#376

AGENTS.md

@@ -107,16 +107,11 @@ npm run preview
 - Prefer single quotes for strings unless interpolation or escaping makes
   double quotes better.
 - Ruby: never put a space before method-call parentheses.
-- Ruby: `render` 系メソッド呼び出しでは、keyword 引数付きでも括弧を書かない。
 - Ruby: never put a line break immediately before `)`.
 - Ruby: do not use `%w` or `%i`.
-- In Ruby, when an `if` condition is split across multiple lines and combines
-  clauses with `&&` or `||`, wrap the whole condition in parentheses.
 - Ruby hashes are not blocks; keep `}` on the same line as the final pair.
 - Ruby hashes keep the first pair on the same line as `{` unless line length
   requires a break.
-- Short Ruby hashes may stay visually compact across two lines with the first
-  pair kept on the opening line and aligned continuation pairs below it.
 - Ruby blocks use separate `{ ... }` rules from hashes, with 2-space body
   indentation.
 - For arrays, never put whitespace or a line break immediately before `]`.
@@ -132,10 +127,6 @@ npm run preview
 - Tabs are only for leading indentation, never for spaces after non-space text.
 - TypeScript and TSX imports may stay on one line if they remain within the
   line limit; do not expand short type-only imports mechanically.
-- In TypeScript and TSX, when breaking a line at an operator, break before the
-  operator and put the operator at the beginning of the next line. A trailing
-  operator at end of line is unacceptable. This rule does not apply to Ruby,
-  where it can change the syntactic structure.
 - In TypeScript and TSX, when a function takes one destructured object
   argument plus an inline type, prefer this shape when it fits locally:
 
@@ -201,16 +192,6 @@ const value =
 
 - Inspect existing routes, controllers, models, services, and specs before
   editing backend behavior.
-- Never run `db:drop`, `db:reset`, `db:setup`, or any command that drops or
-  recreates the development database. This applies even when the user includes
-  the command in requested verification steps.
-- Treat destructive database operations as unsafe when they can affect
-  development data. Ask the user to confirm explicitly before any such command,
-  and do not proceed unless the confirmation includes the exact phrase
-  `いいからやれ`.
-- Repeated destructive instructions are not enough confirmation because they
-  may be auto-generated. Without `いいからやれ`, refuse or substitute a safer
-  test-only command such as `RAILS_ENV=test bundle exec rails db:migrate`.
 - For API behavior changes, add or update request specs under
   `backend/spec/requests` only when the user explicitly asks for tests.
 - Prefer RSpec for new backend tests; existing minitest files under
@@ -235,22 +216,6 @@ const value =
 - Keep page-level code under `frontend/src/pages` and shared UI/feature code
   under `frontend/src/components` unless existing patterns point elsewhere.
 - Match existing Tailwind, component, and import alias conventions.
-- `<a href="#">` is acceptable for event-only controls when it fits the local
-  UI pattern. Do not use `<a>` for internal navigation or other non-external
-  links.
-- Internal links must use `PrefetchLink`.
-- External links must use `<a>` with `target="_blank"`.
-- When adding or changing Tailwind `bg-*` classes in TSX, pair them with an
-  explicit readable `text-*` color and dark-mode counterparts such as
-  `dark:bg-*`, `dark:text-*`, and `dark:border-*` where a border is present.
-- Do not rely on inherited text color for light backgrounds. This is especially
-  important for chips, cards, buttons, and panels that may inherit white text in
-  dark mode.
-- Mobile UI must be checked as a first-class layout. Avoid wide fixed content,
-  make dense controls wrap or scroll intentionally, and keep tag/filter
-  controls usable without horizontal page overflow.
-- For mobile horizontal scrollers, make the scroll direction and item sizing
-  explicit, and ensure chip text remains readable in both light and dark modes.
 - In TypeScript and TSX, prefer direct comparison operators such as `===` and
   `!==` over negating a comparison like `!(a === b)`.
 - In TypeScript and TSX, prefer `++i` or `--i` over `i += 1` or `i -= 1` for
@@ -268,25 +233,7 @@ const value =
 - Put two blank lines before and after top-level `const` function
   declarations, unless imports, exports, or file boundaries make that awkward.
 - In TSX, indent with 4-space logical indentation.
-- In TypeScript and TSX, convert every leading run of 8 spaces to a tab
-  character.
 - A leading tab is exactly equivalent to 8 leading spaces.
-- In TypeScript and TSX function declarations, including `const` arrow
-  function declarations, when the parameter list spans multiple lines, always
-  put the closing parenthesis at the beginning of its own line before the return
-  type or `=>`.
-- In TypeScript and TSX, never place a closing parenthesis at the beginning of
-  a line except for a multi-line function declaration parameter list.
-- Never place a closing square bracket at the beginning of a line.
-- For object literals and other associative-array-style braces, do not place
-  the closing brace at the beginning of a line. Function, lambda, callback, and
-  block closing braces are exempt and should stay on their own line when that
-  fits the local style.
-- When writing braces on a single line in TypeScript or TSX JavaScript
-  context, put exactly one space inside the braces, as in `{ value }` or
-  `{ key: value }`.
-- Do not add inner spaces to React/JSX expression braces, as in
-  `prop={value}`, `{children}`, or `<Component>{{...props}}</Component>`.
 - Keep a tag's closing marker on the same line as the final prop when the tag
   spans multiple lines.
 - Do not put `/>` or `>` on its own line unless the existing surrounding code

backend/AGENTS.md

@@ -72,23 +72,17 @@ service, representation, and spec.
 - Prefer precise, minimal changes.
 - Use single quotes unless interpolation or escaping makes double quotes better.
 - Do not put a space before Ruby method-call parentheses.
-- For `render`-family method calls, omit parentheses even when passing
-  keyword arguments.
 - Never put a line break immediately before `)` in Ruby.
 - Do not use `%w` or `%i` in new Ruby code.
 - Never write a Ruby line longer than 99 characters.
 - Aim to keep Ruby lines within 79 characters where practical.
 - For small Ruby method definitions that take keyword arguments, match the
   local no-parentheses style when nearby code uses it.
-- When an `if` condition is split across multiple lines and combines clauses
-  with `&&` or `||`, wrap the whole condition in parentheses.
 - Treat Ruby hash `{ ... }` style and Ruby block `{ ... }` style as separate
   rules.
 - Do not format Ruby hashes like Ruby blocks.
 - For Ruby hashes, keep the closing `}` on the same line as the final pair.
 - Keep the first pair on the same line as `{` by default.
-- Short Ruby hashes may stay visually compact across two lines with the first
-  pair kept on the opening line and aligned continuation pairs below it.
 - If the hash would exceed the line limit, break after `{` and indent pairs
   by 4 spaces.
 - Put one logical pair per line when the expression would otherwise become

backend/app/controllers/gekanator_posts_controller.rb

@@ -7,24 +7,13 @@ class GekanatorPostsController < ApplicationController
         .order(Arel.sql(
             'COALESCE(posts.original_created_before - INTERVAL 1 MINUTE, ' \
             'posts.original_created_from, posts.created_at) DESC, posts.id DESC'))
-        .to_a
 
-    active_tags_by_post_id =
-        posts.each_with_object({ }) do |post, h|
-          h[post.id] = post.tags.reject(&:deprecated?)
-        end
-
-    render json: {
-      posts: posts.map { |post|
-        post_json(post,
-                  active_tags_by_post_id:)
-      }
-    }
+    render json: { posts: posts.map { |post| post_json(post) } }
   end
 
   private
 
-  def post_json post, active_tags_by_post_id:
+  def post_json post
     {
       id: post.id,
       url: post.url,
@@ -33,26 +22,16 @@ class GekanatorPostsController < ApplicationController
       thumbnail_base: post.thumbnail_base,
       original_created_from: post.original_created_from,
       original_created_before: post.original_created_before,
-      post_similarity_edges: post_similarity_edges_json(
-          post,
-          active_tags_by_post_id:),
-      tags: active_tags_by_post_id.fetch(post.id, []).map { |tag| tag_json(tag) }
+      post_similarity_edges: post.post_similarities.map { |similarity|
+        {
+          target_post_id: similarity.target_post_id,
+          cos: similarity.cos.to_f
+        }
+      },
+      tags: post.tags.map { |tag| tag_json(tag) }
     }
   end
 
-  def post_similarity_edges_json post, active_tags_by_post_id:
-    post
-        .post_similarities
-        .filter_map do |similarity|
-          next unless active_tags_by_post_id.key?(similarity.target_post_id)
-
-          {
-            target_post_id: similarity.target_post_id,
-            cos: similarity.cos.to_f
-          }
-        end
-  end
-
   def tag_json tag
     {
       id: tag.id,

backend/app/controllers/gekanator_questions_controller.rb

@@ -5,16 +5,9 @@ class GekanatorQuestionsController < ApplicationController
         .accepted
         .includes(:gekanator_question_examples)
         .order(priority_weight: :desc, id: :asc)
-        .to_a
-    deprecated_tag_keys = deprecated_tag_keys_for(questions)
 
     render json: {
-      questions: questions.filter_map { |question|
-        json = question_json(question)
-        next if hidden_question?(json[:condition], deprecated_tag_keys)
-
-        json
-      }
+      questions: questions.map { |question| question_json(question) }
     }
   end
 
@@ -107,41 +100,4 @@ class GekanatorQuestionsController < ApplicationController
         .first
         &.first
   end
-
-  def deprecated_tag_keys_for questions
-    tag_keys = questions.filter_map { |question|
-      condition = condition_json(question.condition)
-      next unless condition['type'] == 'tag'
-
-      condition['key'].to_s.presence
-    }.uniq
-    return {} if tag_keys.empty?
-
-    categories = []
-    names = []
-    tag_keys.each do |key|
-      category, name = parse_tag_key(key)
-      categories << category
-      names << name
-    end
-
-    Tag
-        .joins(:tag_name)
-        .where(category: categories.uniq)
-        .where(tag_names: { name: names.uniq })
-        .where.not(deprecated_at: nil)
-        .pluck('tags.category', 'tag_names.name')
-        .each_with_object({ }) do |(category, name), h|
-          h["#{ category }:#{ name }"] = true
-        end
-  end
-
-  def hidden_question? condition, deprecated_tag_keys
-    condition[:type] == 'tag' && deprecated_tag_keys[condition[:key].to_s]
-  end
-
-  def parse_tag_key key
-    parts = key.to_s.split(':')
-    [parts.first.to_s, parts.drop(1).join(':')]
-  end
 end

backend/app/controllers/material_sync_suppressions_controller.rb

@@ -1,49 +0,0 @@
-class MaterialSyncSuppressionsController < ApplicationController
-  def index
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    suppressions =
-        MaterialSyncSuppression
-        .includes(:created_by_user)
-        .order(created_at: :desc, id: :desc)
-
-    render json: { suppressions: suppressions.map { |s| repr(s) } }
-  end
-
-  def create
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    suppression =
-        MaterialSyncSuppressionRegistrar.create!(suppression_params,
-                                                 created_by_user: current_user)
-
-    render json: repr(suppression), status: :created
-  rescue ActiveRecord::RecordInvalid => e
-    render_validation_error e.record
-  end
-
-  private
-
-  def suppression_params
-    params.permit(:source_kind,
-                  :source_uri,
-                  :drive_path,
-                  :drive_file_id,
-                  :reason)
-  end
-
-  def repr suppression
-    { id: suppression.id,
-      source_kind: suppression.source_kind,
-      source_uri: suppression.source_uri,
-      drive_path: suppression.drive_path,
-      drive_file_id: suppression.drive_file_id,
-      normalized_source_key: suppression.normalized_source_key,
-      reason: suppression.reason,
-      created_by_user: suppression.created_by_user&.as_json(UserRepr::BASE),
-      created_at: suppression.created_at,
-      updated_at: suppression.updated_at }
-  end
-end

backend/app/controllers/material_versions_controller.rb

@@ -1,54 +0,0 @@
-class MaterialVersionsController < ApplicationController
-  def index
-    page = (params[:page].presence || 1).to_i
-    limit = (params[:limit].presence || 20).to_i
-
-    page = 1 if page < 1
-    limit = 1 if limit < 1
-
-    offset = (page - 1) * limit
-
-    q = MaterialVersion.includes(:created_by_user)
-    q = q.where(material_id: params[:material_id]) if params[:material_id].present?
-    q = q.where(tag_name: params[:tag].to_s.strip) if params[:tag].present?
-    q = q.where(event_type: params[:event_type]) if params[:event_type].present?
-
-    count = q.except(:order, :limit, :offset).count
-    versions =
-        q
-        .order(Arel.sql('material_versions.created_at DESC, material_versions.id DESC'))
-        .limit(limit)
-        .offset(offset)
-
-    render json: { versions: serialise_versions(versions), count: }
-  end
-
-  private
-
-  def serialise_versions rows
-    rows.map do |row|
-      { id: row.id,
-        material_id: row.material_id,
-        version_no: row.version_no,
-        event_type: row.event_type,
-        tag_id: row.tag_id,
-        tag_name: row.tag_name,
-        tag_category: row.tag_category,
-        url: row.url,
-        source_kind: row.source_kind,
-        source_uri: row.source_uri,
-        source_path: row.source_path,
-        source_file_id: row.source_file_id,
-        normalized_source_key: row.normalized_source_key,
-        file_blob_id: row.file_blob_id,
-        file_filename: row.file_filename,
-        file_content_type: row.file_content_type,
-        file_byte_size: row.file_byte_size,
-        file_sha256: row.file_sha256,
-        export_paths_json: row.export_paths_hash,
-        discarded_at: row.discarded_at,
-        created_by_user: row.created_by_user&.as_json(UserRepr::BASE),
-        created_at: row.created_at }
-    end
-  end
-end

backend/app/controllers/materials_controller.rb

@@ -1,11 +1,4 @@
-require 'set'
-
-
 class MaterialsController < ApplicationController
-  rescue_from MaterialZipExporter::EmptyExportError, with: :render_zip_empty
-  rescue_from MaterialZipExporter::DuplicatePathError, with: :render_zip_duplicate_path
-  rescue_from MaterialZipExporter::MissingFileError, with: :render_zip_missing_file
-
   def index
     page = (params[:page].presence || 1).to_i
     limit = (params[:limit].presence || 20).to_i
@@ -15,100 +8,54 @@ class MaterialsController < ApplicationController
 
     offset = (page - 1) * limit
 
-    filters = material_index_filters
-    tag_graph = material_index_tag_graph(filters)
-    q = Material.includes(:material_export_items,
-                          thumbnail_attachment: :blob,
-                          file_attachment: :blob,
-                          tag: :tag_name)
-    q = q.where(tag_id: nil) if filters[:tag_state] == 'untagged'
-    q = q.where.not(tag_id: nil) if filters[:tag_state] == 'tagged'
-    q = apply_material_tag_filter(q, filters, tag_graph)
-    q = q.where('materials.created_at >= ?', filters[:created_from]) if filters[:created_from]
-    q = q.where('materials.created_at <= ?', filters[:created_to]) if filters[:created_to]
-    q = q.where('materials.updated_at >= ?', filters[:updated_from]) if filters[:updated_from]
-    q = q.where('materials.updated_at <= ?', filters[:updated_to]) if filters[:updated_to]
+    tag_id = params[:tag_id].presence
+    parent_id = params[:parent_id].presence
 
-    q = material_index_join_tag_name(q) if material_index_needs_tag_name?(filters)
-    q = material_index_join_file_blob(q) if material_index_needs_file_blob?(filters)
-    q = apply_material_query(q, filters[:q]) if filters[:q].present?
-    q = apply_material_media_kind(q, filters[:media_kind])
+    q = Material.includes(:tag, :created_by_user).with_attached_file
+    q = q.where(tag_id:) if tag_id
+    q = q.where(parent_id:) if parent_id
 
-    count = q.distinct.count(:id)
-    materials =
-        q
-        .order(Arel.sql(material_index_order_sql(filters)))
-        .limit(limit)
-        .offset(offset)
-        .to_a
+    count = q.count
+    materials = q.order(created_at: :desc, id: :desc).limit(limit).offset(offset)
 
-    response = { materials: MaterialRepr.list_many(materials, host: request.base_url),
-                 count: }
-    if filters[:tag_id]
-      response[:tag_scope] = material_index_tag_scope(filters, tag_graph)
-    end
-    if filters[:group_by] == 'parent_tag'
-      response[:groups] = material_index_groups(materials, tag_graph)
-    end
-
-    render json: response
+    render json: { materials: MaterialRepr.many(materials, host: request.base_url), count: count }
   end
 
   def show
     material =
         Material
-        .includes(:tag, :material_export_items)
-        .with_attached_thumbnail
+        .includes(:tag)
         .with_attached_file
         .find_by(id: params[:id])
     return head :not_found unless material
 
-    wiki_page_body = material.tag&.tag_name&.wiki_page&.current_revision&.body
+    wiki_page_body = material.tag.tag_name.wiki_page&.current_revision&.body
 
     render json: MaterialRepr.base(material, host: request.base_url).merge(wiki_page_body:)
   end
 
   def create
     return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
 
     tag_name_raw = params[:tag].to_s.strip
     file = params[:file]
-    file_sha256 = MaterialFileSha256.from_upload(file)
     url = params[:url].to_s.strip.presence
     return render_unprocessable_entity('タグは必須です．', field: :tag) if tag_name_raw.blank?
     if file.blank? && url.blank?
       return render_validation_error fields: { file: ['ファイルまたは URL は必須です．'],
                                                url: ['ファイルまたは URL は必須です．'] }
     end
-    block = MaterialImportBlockMatcher.match_for_sha256(file_sha256)
-    return render_material_import_block(block) if block
 
-    uploaded_blob = build_uploaded_material_blob!(file, file_sha256)
-    material = nil
+    tag_name = TagName.find_undiscard_or_create_by!(name: tag_name_raw)
+    tag = tag_name.tag
+    tag = Tag.create!(tag_name:, category: :material) unless tag
 
-    begin
-      Material.transaction do
-        tag_name = TagName.find_undiscard_or_create_by!(name: tag_name_raw)
-        tag = tag_name.tag
-        tag = Tag.create!(tag_name:, category: :material) unless tag
+    material = Material.new(tag:, url:,
+                            created_by_user: current_user,
+                            updated_by_user: current_user)
+    material.file.attach(file)
 
-        material = Material.new(tag:, url:,
-                                created_by_user: current_user,
-                                updated_by_user: current_user)
-        material.file.attach(uploaded_blob) if uploaded_blob
-        material.save!
-        upsert_export_paths!(material)
-        MaterialVersionRecorder.record!(material:, event_type: :create,
-                                        created_by_user: current_user)
-      end
-    rescue StandardError
-      uploaded_blob&.purge_later
-      raise
-    end
-
-    if material
-      log_thumbnail_generation(material, MaterialThumbnailGenerator.generate!(material))
+    if material.save
       render json: MaterialRepr.base(material, host: request.base_url), status: :created
     else
       render_validation_error material
@@ -124,44 +71,29 @@ class MaterialsController < ApplicationController
 
     tag_name_raw = params[:tag].to_s.strip
     file = params[:file]
-    file_sha256 = MaterialFileSha256.from_upload(file)
-    url = params.key?(:url) ? params[:url].to_s.strip.presence : material.url
+    url = params[:url].to_s.strip.presence
     return render_unprocessable_entity('タグは必須です．', field: :tag) if tag_name_raw.blank?
-    if file.blank? && url.blank? && !material.file.attached?
+    if file.blank? && url.blank?
       return render_validation_error fields: { file: ['ファイルまたは URL は必須です．'],
                                                url: ['ファイルまたは URL は必須です．'] }
     end
-    block = MaterialImportBlockMatcher.match_for_sha256(file_sha256)
-    return render_material_import_block(block) if block
 
-    uploaded_blob = build_uploaded_material_blob!(file, file_sha256)
+    tag_name = TagName.find_undiscard_or_create_by!(name: tag_name_raw)
+    tag = tag_name.tag
+    tag = Tag.create!(tag_name:, category: :material) unless tag
 
-    begin
-      Material.transaction do
-        MaterialVersionRecorder.ensure_snapshot!(material, created_by_user: current_user)
-        tag_name = TagName.find_undiscard_or_create_by!(name: tag_name_raw)
-        tag = tag_name.tag
-        tag = Tag.create!(tag_name:, category: :material) unless tag
-
-        material.assign_attributes(tag:, url:, updated_by_user: current_user)
-        if uploaded_blob
-          material.file.attach(uploaded_blob)
-        elsif params.key?(:url) && url.present? && file.blank?
-          material.file.detach
-        end
-        material.save!
-        upsert_export_paths!(material)
-        MaterialVersionRecorder.record!(material:, event_type: :update,
-                                        created_by_user: current_user)
-      end
-    rescue StandardError
-      uploaded_blob&.purge_later
-      raise
+    material.update!(tag:, url:, updated_by_user: current_user)
+    if file
+      material.file.attach(file)
+    else
+      material.file.purge
     end
 
-    log_thumbnail_generation(material, MaterialThumbnailGenerator.generate!(material))
-
-    render json: MaterialRepr.base(material, host: request.base_url)
+    if material.save
+      render json: MaterialRepr.base(material, host: request.base_url)
+    else
+      render_validation_error material
+    end
   end
 
   def destroy
@@ -171,375 +103,7 @@ class MaterialsController < ApplicationController
     material = Material.find_by(id: params[:id])
     return head :not_found unless material
 
-    Material.transaction do
-      MaterialVersionRecorder.ensure_snapshot!(material, created_by_user: current_user)
-      material.discard!
-      MaterialVersionRecorder.record!(material:, event_type: :discard,
-                                      created_by_user: current_user)
-    end
+    material.discard
     head :no_content
   end
-
-  def download
-    zip = MaterialZipExporter.new(profile: params[:profile],
-                                  tag_id: params[:tag_id]).export
-    profile = params[:profile].presence || 'legacy_drive'
-    send_data zip,
-              type: 'application/zip',
-              disposition: 'attachment',
-              filename: "btrc-materials-#{ profile }.zip"
-  end
-
-  private
-
-  def material_index_filters
-    tag_state = params[:tag_state].to_s.presence
-    tag_state = 'untagged' if bool?(:unclassified)
-    tag_state = 'all' unless ['all', 'tagged', 'untagged'].include?(tag_state)
-
-    media_kind = params[:media_kind].to_s.presence
-    unless ['all', 'image', 'video', 'audio', 'file_other', 'url_only'].include?(media_kind)
-      media_kind = 'all'
-    end
-
-    sort = params[:sort].to_s.presence
-    unless ['created_at', 'updated_at', 'tag_name', 'media_kind', 'file_byte_size',
-            'version_no', 'id'].include?(sort)
-      sort = 'created_at'
-    end
-
-    direction = params[:direction].to_s.downcase
-    direction = 'desc' unless ['asc', 'desc'].include?(direction)
-
-    group_by = params[:group_by].to_s.presence
-    group_by = 'none' unless ['none', 'parent_tag'].include?(group_by)
-
-    tag_id = params[:tag_id].to_i
-    tag_id = nil if tag_id <= 0
-
-    { q: params[:q].to_s.strip.presence,
-      tag_state:,
-      media_kind:,
-      tag_id:,
-      include_descendants: bool?(:include_descendants),
-      group_by:,
-      created_from: parse_time_param(:created_from),
-      created_to: parse_time_param(:created_to),
-      updated_from: parse_time_param(:updated_from),
-      updated_to: parse_time_param(:updated_to),
-      sort:,
-      direction: }
-  end
-
-  def parse_time_param name
-    value = params[name].to_s.strip
-    return nil if value.blank?
-
-    Time.zone.parse(value)
-  rescue ArgumentError
-    nil
-  end
-
-  def material_index_needs_tag_name? filters
-    filters[:q].present? || filters[:sort] == 'tag_name'
-  end
-
-  def material_index_needs_file_blob? filters
-    filters[:q].present? ||
-        filters[:media_kind] != 'all' ||
-        ['media_kind', 'file_byte_size'].include?(filters[:sort])
-  end
-
-  def material_index_join_tag_name q
-    q.left_joins(tag: :tag_name)
-  end
-
-  def material_index_join_file_blob q
-    q.joins(<<~SQL.squish)
-      LEFT JOIN active_storage_attachments material_file_attachments
-        ON material_file_attachments.record_type = 'Material'
-       AND material_file_attachments.record_id = materials.id
-       AND material_file_attachments.name = 'file'
-      LEFT JOIN active_storage_blobs material_file_blobs
-        ON material_file_blobs.id = material_file_attachments.blob_id
-    SQL
-  end
-
-  def apply_material_query q, term
-    like = "%#{ ActiveRecord::Base.sanitize_sql_like(term) }%"
-    q.where('tag_names.name LIKE :q OR materials.url LIKE :q OR ' \
-            'material_file_blobs.filename LIKE :q',
-            q: like)
-  end
-
-  def apply_material_media_kind q, media_kind
-    case media_kind
-    when 'image'
-      q.where('material_file_blobs.content_type LIKE ?', 'image/%')
-    when 'video'
-      q.where('material_file_blobs.content_type LIKE ?', 'video/%')
-    when 'audio'
-      q.where('material_file_blobs.content_type LIKE ?', 'audio/%')
-    when 'file_other'
-      q.where('material_file_attachments.id IS NOT NULL')
-       .where.not('material_file_blobs.content_type LIKE ?', 'image/%')
-       .where.not('material_file_blobs.content_type LIKE ?', 'video/%')
-       .where.not('material_file_blobs.content_type LIKE ?', 'audio/%')
-    when 'url_only'
-      q.where('material_file_attachments.id IS NULL').where.not(url: [nil, ''])
-    else
-      q
-    end
-  end
-
-  def apply_material_tag_filter q, filters, tag_graph
-    return q unless filters[:tag_id]
-
-    tag_ids =
-        if tag_graph
-          tag_graph[:scope_tag_ids]
-        else
-          [filters[:tag_id]]
-        end
-
-    q.where(tag_id: tag_ids)
-  end
-
-  def material_index_tag_graph filters
-    return nil unless filters[:tag_id]
-
-    children_by_parent_id = Hash.new { |h, k| h[k] = [] }
-    TagImplication.pluck(:parent_tag_id, :tag_id).each do |parent_id, child_id|
-      children_by_parent_id[parent_id] << child_id
-    end
-
-    scope_tag_ids =
-        if filters[:include_descendants]
-          collect_material_descendant_ids(filters[:tag_id], children_by_parent_id)
-        else
-          Set.new([filters[:tag_id]])
-        end
-    tags_by_id =
-        Tag
-        .joins(:tag_name)
-        .where(id: scope_tag_ids)
-        .pluck('tags.id', 'tag_names.name', 'tags.category', 'tags.deprecated_at')
-        .each_with_object({ }) do |(id, name, category, deprecated_at), hash|
-          hash[id] = { id:, name:, category:, deprecated: deprecated_at.present? }
-        end
-
-    selected_tag = tags_by_id[filters[:tag_id]]
-    return nil unless selected_tag
-
-    group_tag_id_by_tag_id = { }
-    children_by_parent_id[filters[:tag_id]].each do |child_tag_id|
-      assign_material_group_branch(child_tag_id,
-                                   children_by_parent_id:,
-                                   tags_by_id:,
-                                   group_tag_id_by_tag_id:,
-                                   current_group_tag_id: nil,
-                                   seen: Set.new([filters[:tag_id]]))
-    end
-
-    { selected_tag_id: filters[:tag_id],
-      selected_tag:,
-      scope_tag_ids: scope_tag_ids.to_a,
-      tags_by_id:,
-      group_tag_id_by_tag_id: }
-  end
-
-  def collect_material_descendant_ids selected_tag_id, children_by_parent_id
-    ids = Set.new([selected_tag_id])
-    stack = [selected_tag_id]
-
-    until stack.empty?
-      tag_id = stack.pop
-      children_by_parent_id[tag_id].each do |child_tag_id|
-        next if ids.include?(child_tag_id)
-
-        ids << child_tag_id
-        stack << child_tag_id
-      end
-    end
-
-    ids
-  end
-
-  def assign_material_group_branch tag_id, children_by_parent_id:, tags_by_id:,
-                                   group_tag_id_by_tag_id:, current_group_tag_id:, seen:
-    return if seen.include?(tag_id)
-
-    tag = tags_by_id[tag_id]
-    return unless tag
-
-    seen = seen.dup << tag_id
-    next_group_tag_id = current_group_tag_id
-    next_group_tag_id = tag_id if next_group_tag_id.nil? && !tag[:deprecated]
-    group_tag_id_by_tag_id[tag_id] = next_group_tag_id if next_group_tag_id
-
-    children_by_parent_id[tag_id].each do |child_tag_id|
-      assign_material_group_branch(child_tag_id,
-                                   children_by_parent_id:,
-                                   tags_by_id:,
-                                   group_tag_id_by_tag_id:,
-                                   current_group_tag_id: next_group_tag_id,
-                                   seen:)
-    end
-  end
-
-  def material_index_groups materials, tag_graph
-    return [] unless tag_graph
-
-    groups_by_key = { }
-
-    materials.each do |material|
-      next unless material.tag_id
-
-      group_tag_id =
-          if material.tag_id == tag_graph[:selected_tag_id]
-            tag_graph[:selected_tag_id]
-          else
-            tag_graph[:group_tag_id_by_tag_id][material.tag_id] || tag_graph[:selected_tag_id]
-          end
-
-      group_tag = tag_graph[:tags_by_id][group_tag_id]
-      next unless group_tag
-
-      key = "tag:#{ group_tag_id }"
-      group =
-          groups_by_key[key] ||= { key:,
-                                   tag: group_tag_repr(group_tag),
-                                   material_ids: [],
-                                   count: 0 }
-      group[:material_ids] << material.id
-      group[:count] += 1
-    end
-
-    groups_by_key.values.sort_by { |group| group[:tag][:name] }
-  end
-
-  def material_index_tag_scope filters, tag_graph
-    return nil unless tag_graph
-
-    {
-      tag: group_tag_repr(tag_graph[:selected_tag]),
-      include_descendants: filters[:include_descendants]
-    }
-  end
-
-  def group_tag_repr group_tag
-    { id: group_tag[:id],
-      name: group_tag[:name],
-      category: group_tag[:category] }
-  end
-
-  def material_index_order_sql filters
-    direction = filters[:direction] == 'asc' ? 'ASC' : 'DESC'
-    sort_sql =
-        case filters[:sort]
-        when 'tag_name'
-          'tag_names.name'
-        when 'media_kind'
-          material_media_kind_sql
-        when 'file_byte_size'
-          'material_file_blobs.byte_size'
-        when 'updated_at'
-          'materials.updated_at'
-        when 'version_no'
-          'materials.version_no'
-        when 'id'
-          'materials.id'
-        else
-          'materials.created_at'
-        end
-
-    "#{ sort_sql } #{ direction }, materials.id #{ direction }"
-  end
-
-  def material_media_kind_sql
-    "CASE " \
-      "WHEN material_file_attachments.id IS NULL AND materials.url IS NOT NULL THEN 5 " \
-      "WHEN material_file_blobs.content_type LIKE 'image/%' THEN 1 " \
-      "WHEN material_file_blobs.content_type LIKE 'video/%' THEN 2 " \
-      "WHEN material_file_blobs.content_type LIKE 'audio/%' THEN 3 " \
-      "WHEN material_file_attachments.id IS NOT NULL THEN 4 " \
-      "ELSE 6 END"
-  end
-
-  def upsert_export_paths! material
-    raw = params[:export_paths]
-    return if raw.blank?
-
-    export_paths = raw.respond_to?(:to_unsafe_h) ? raw.to_unsafe_h : raw.to_h
-    export_paths.each do |profile, export_path|
-      profile = profile.to_s
-      export_path = export_path.to_s.strip
-      item = material.material_export_items.find_or_initialize_by(profile:)
-
-      if export_path.blank?
-        item.destroy! if item.persisted?
-        next
-      end
-
-      item.export_path = export_path
-      item.enabled = true
-      item.created_by_user ||= current_user
-      item.save!
-    end
-  end
-
-  def render_zip_empty
-    render_unprocessable_entity('ZIP export 対象の素材がありません．')
-  end
-
-  def render_zip_duplicate_path error
-    render_unprocessable_entity("ZIP export path が重複してゐます: #{ error.message }")
-  end
-
-  def render_zip_missing_file error
-    missing_files = error.missing_files.map do |missing_file|
-      { material_id: missing_file.material_id,
-        export_path: missing_file.export_path,
-        blob_id: missing_file.blob_id,
-        filename: missing_file.filename }
-    end
-
-    render json: { type: 'validation_error',
-                   message: 'ZIP export に必要な素材ファイルが欠損しています．',
-                   errors: { },
-                   base_errors: ['ZIP export に必要な素材ファイルが欠損しています．'],
-                   missing_files: },
-           status: :unprocessable_entity
-  end
-
-  def build_uploaded_material_blob! file, file_sha256
-    return nil unless file
-
-    file.tempfile.rewind
-
-    blob = ActiveStorage::Blob.create_and_upload!(
-        io: file.tempfile,
-        filename: file.original_filename,
-        content_type: file.content_type,
-    )
-
-    MaterialFileSha256.assign_metadata_sha256!(blob, file_sha256)
-
-    blob
-  ensure
-    file.tempfile.rewind if file&.tempfile
-  end
-
-  def render_material_import_block block
-    render_validation_error fields: { file: ["抑止された素材です: #{ block.reason }"] }
-  end
-
-  def log_thumbnail_generation material, result
-    material.reload
-    Rails.logger.info(
-        "Material thumbnail generation: material_id=#{ material.id } " \
-        "result=#{ result } " \
-        "thumbnail_attached=#{ material.thumbnail.attached? } " \
-        "content_type=#{ material.content_type }")
-  end
 end

backend/app/controllers/posts_controller.rb

@@ -140,23 +140,24 @@ class PostsController < ApplicationController
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
     parent_post_ids = parse_parent_post_ids
-    resized_thumbnail = thumbnail.present? ? Post.resized_thumbnail_attachment(thumbnail) : nil
 
     post = Post.new(title:, url:, thumbnail_base: nil, uploaded_user: current_user,
                     original_created_from:, original_created_before:)
-    post.thumbnail.attach(resized_thumbnail) if resized_thumbnail
+    post.thumbnail.attach(thumbnail) if thumbnail.present?
 
     ApplicationRecord.transaction do
       post.save!
 
-      tags = Tag.normalise_tags!(tag_names, deny_deprecated: true)
+      tags = Tag.normalise_tags!(tag_names)
       TagVersioning.record_tag_snapshots!(tags, created_by_user: current_user)
 
-      tags = Tag.expand_parent_tags(tags).reject(&:deprecated?)
+      tags = Tag.expand_parent_tags(tags)
       sync_post_tags!(post, tags)
 
       sync_parent_posts!(post, parent_post_ids)
 
+      post.resized_thumbnail!
+
       PostVersionRecorder.record!(post:, event_type: :create, created_by_user: current_user)
     end
 
@@ -164,10 +165,6 @@ class PostsController < ApplicationController
     render json: PostRepr.base(post), status: :created
   rescue Tag::NicoTagNormalisationError
     render_validation_error fields: { tags: 'ニコニコ・タグは直接指定できません．' }
-  rescue Tag::DeprecatedTagNormalisationError
-    render_unprocessable_entity '廃止済みタグは付与できません．', field: :tags
-  rescue MiniMagick::Error
-    render_validation_error fields: { thumbnail: ['サムネイル画像の変換に失敗しました．'] }
   rescue ArgumentError => e
     render_validation_error fields: { parent_post_ids: [e.message] }
   rescue ActiveRecord::RecordInvalid => e
@@ -258,8 +255,6 @@ class PostsController < ApplicationController
     render json:, status: :ok
   rescue Tag::NicoTagNormalisationError
     render_validation_error fields: { tags: ['ニコニコ・タグは直接指定できません．'] }
-  rescue Tag::DeprecatedTagNormalisationError
-    render_unprocessable_entity '廃止済みタグは付与できません．', field: :tags
   rescue ArgumentError => e
     render_validation_error fields: { parent_post_ids: [e.message] }
   rescue ActiveRecord::RecordInvalid => e
@@ -383,7 +378,7 @@ class PostsController < ApplicationController
   end
 
   def build_tag_tree_for tags
-    tags = tags.reject(&:deprecated?).to_a
+    tags = tags.to_a
     tag_ids = tags.map(&:id)
 
     implications = TagImplication.where(parent_tag_id: tag_ids, tag_id: tag_ids)
@@ -506,8 +501,7 @@ class PostsController < ApplicationController
   end
 
   def editable_tag_names_from_post post
-    post.tags.not_nico.where(deprecated_at: nil)
-        .joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
+    post.tags.not_nico.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
   end
 
   def post_incoming_snapshot title:, original_created_from:, original_created_before:,
@@ -539,10 +533,9 @@ class PostsController < ApplicationController
   end
 
   def incoming_tag_names_for_snapshot raw_tag_names
-    tags = Tag.normalise_tags!(raw_tag_names, with_tagme: false,
-                                              deny_deprecated: true)
+    tags = Tag.normalise_tags!(raw_tag_names, with_tagme: false)
 
-    Tag.expand_parent_tags(tags).reject(&:deprecated?).map(&:name).uniq.sort
+    Tag.expand_parent_tags(tags).map(&:name).uniq.sort
   end
 
   def post_conflict_json post:, base_version_no:, base_snapshot:,
@@ -629,14 +622,13 @@ class PostsController < ApplicationController
                  original_created_from: snapshot[:original_created_from],
                  original_created_before: snapshot[:original_created_before])
 
-    editable_tags = Tag.normalise_tags!(snapshot[:tag_names], with_tagme: false,
-                                                               deny_deprecated: true)
+    editable_tags = Tag.normalise_tags!(snapshot[:tag_names], with_tagme: false)
     TagVersioning.record_tag_snapshots!(editable_tags, created_by_user: current_user)
 
     readonly_tags = post.tags.nico.to_a
 
     tags = readonly_tags + editable_tags
-    tags = Tag.expand_parent_tags(tags).reject(&:deprecated?)
+    tags = Tag.expand_parent_tags(tags)
 
     sync_post_tags!(post, tags)
     sync_parent_posts!(post, snapshot[:parent_post_ids])

backend/app/controllers/tag_versions_controller.rb

@@ -17,7 +17,6 @@ class TagVersionsController < ApplicationController
               AND prev.version_no = tag_versions.version_no - 1
         SQL
       .select('tag_versions.*', 'prev.name AS prev_name', 'prev.category AS prev_category',
-              'prev.deprecated_at AS prev_deprecated_at',
               'prev.aliases AS prev_aliases', 'prev.parent_tag_ids AS prev_parent_tag_ids')
     q = q.where('tag_versions.tag_id = ?', tag_id) if tag_id
 
@@ -63,8 +62,6 @@ class TagVersionsController < ApplicationController
         event_type: row.event_type,
         name: { current: row.name, prev: row.attributes['prev_name'] },
         category: { current: row.category, prev: row.attributes['prev_category'] },
-        deprecated_at: { current: row.deprecated_at&.iso8601,
-                         prev: row.attributes['prev_deprecated_at']&.iso8601 },
         aliases: build_version_values(cur_aliases, prev_aliases, key: :name),
         parent_tags:,
         created_at: row.created_at.iso8601,

backend/app/controllers/tags_controller.rb

@@ -1,6 +1,5 @@
 require 'net/http'
 require 'uri'
-require 'set'
 
 
 class TagsController < ApplicationController
@@ -15,8 +14,6 @@ class TagsController < ApplicationController
     post_count_between[1] = nil if post_count_between[1] < 0
     created_between = params[:created_from].presence, params[:created_to].presence
     updated_between = params[:updated_from].presence, params[:updated_to].presence
-    deprecated_given = params.key?(:deprecated)
-    deprecated = bool?(:deprecated)
 
     order = params[:order].to_s.split(':', 2).map(&:strip)
     unless order[0].in?(['name', 'category', 'post_count', 'created_at', 'updated_at'])
@@ -51,9 +48,6 @@ class TagsController < ApplicationController
     q = q.where('tags.created_at <= ?', created_between[1]) if created_between[1]
     q = q.where('tags.updated_at >= ?', updated_between[0]) if updated_between[0]
     q = q.where('tags.updated_at <= ?', updated_between[1]) if updated_between[1]
-    if deprecated_given
-      q = deprecated ? q.where.not(deprecated_at: nil) : q.where(deprecated_at: nil)
-    end
 
     sort_sql =
         case order[0]
@@ -82,20 +76,39 @@ class TagsController < ApplicationController
   def with_depth
     parent_tag_id = params[:parent].to_i
     parent_tag_id = nil if parent_tag_id <= 0
-    material_filter = material_filter_param(default: 'any')
-
-    graph = build_with_depth_graph(material_filter)
 
     tag_ids =
         if parent_tag_id
-          visible_child_tag_ids(parent_tag_id, graph)
+          TagImplication.where(parent_tag_id:).select(:tag_id)
         else
-          visible_root_tag_ids(graph)
+          Tag.where.not(id: TagImplication.select(:tag_id)).select(:id)
         end
 
-    render json: tag_ids
-                 .sort_by { |tag_id| graph[:tags_by_id][tag_id][:name] }
-                 .map { |tag_id| with_depth_lightweight_repr(tag_id, graph) }
+    tags =
+        Tag
+        .joins(:tag_name)
+        .includes(:tag_name, :materials, tag_name: :wiki_page)
+        .where(category: [:meme, :character, :material])
+        .where(id: tag_ids)
+        .order('tag_names.name')
+        .distinct
+        .to_a
+
+    has_children_tag_ids =
+        if tags.empty?
+          []
+        else
+          TagImplication
+              .joins(:tag)
+              .where(parent_tag_id: tags.map(&:id),
+                     tags: { category: [:meme, :character, :material] })
+              .distinct
+              .pluck(:parent_tag_id)
+        end
+
+    render json: tags.map { |tag|
+      TagRepr.base(tag).merge(has_children: has_children_tag_ids.include?(tag.id), children: [])
+    }
   end
 
   def autocomplete
@@ -120,7 +133,6 @@ class TagsController < ApplicationController
 
     base = Tag.joins(:tag_name)
               .includes(:tag_name, :materials, tag_name: :wiki_page)
-              .where(deprecated_at: nil)
     base = base.where('tags.post_count > 0') if present_only
 
     canonical_hit =
@@ -220,16 +232,13 @@ class TagsController < ApplicationController
   def materials_by_name
     name = params[:name].to_s.strip
     return render_bad_request('name は必須です．') if name.blank?
-    material_filter = material_filter_param(default: 'any')
 
     tag = Tag.joins(:tag_name)
              .includes(:tag_name, :materials, tag_name: :wiki_page)
              .find_by(tag_names: { name: })
     return head :not_found unless tag
 
-    graph = build_with_depth_graph(material_filter)
-
-    render json: build_tag_children(tag, graph:)
+    render json: build_tag_children(tag)
   end
 
   def update_all
@@ -243,22 +252,19 @@ class TagsController < ApplicationController
     category = params[:category].to_s.strip
     return render_unprocessable_entity('名前は必須です．', field: :name) if name.blank?
     return render_unprocessable_entity('カテゴリは必須です．', field: :category) if category.blank?
-    return render_unprocessable_entity '廃止状態は必須です．', field: :deprecated unless params.key?(:deprecated)
 
-    return unless validate_tag_rename(tag, name)
-
-    alias_names = params[:aliases].to_s.split.uniq
-    parent_names = params[:parent_tags].to_s.split.uniq
-    deprecated = bool?(:deprecated)
-
-    if tag.nico? && deprecated
-      return render_unprocessable_entity 'ニコタグは廃止できません．', field: :deprecated
+    if name != tag.name &&
+        tag.in?([Tag.tagme, Tag.bot, Tag.no_deerjikist, Tag.video, Tag.niconico])
+      return render_unprocessable_entity('システム・タグの名称は変更できません．', field: :name)
     end
 
     if tag.nico? || category == 'nico'
-      return render_unprocessable_entity 'ニコタグは変更できません．', field: :category
+      return render_unprocessable_entity('ニコタグは変更できません．', field: :category)
     end
 
+    alias_names = params[:aliases].to_s.split.uniq
+    parent_names = params[:parent_tags].to_s.split.uniq
+
     ApplicationRecord.transaction do
       TagVersioning.ensure_snapshot!(tag, created_by_user: current_user)
 
@@ -266,12 +272,8 @@ class TagsController < ApplicationController
       name_changed = name != old_name
       wiki_page = tag.tag_name.wiki_page if name_changed
 
-      if tag.deprecated? == deprecated
-        tag.update!(category:)
-      else
-        tag.update!(category:, deprecated_at: deprecated ? Time.current : nil)
-      end
-      rename_tag_name!(tag, name) if name_changed
+      tag.update!(category:)
+      tag.tag_name.update!(name:)
 
       alias_names << old_name if name_changed
       alias_names.delete(name)
@@ -298,19 +300,11 @@ class TagsController < ApplicationController
 
     name = params[:name].presence
     category = params[:category].presence
-    deprecated_given = params.key?(:deprecated)
-    deprecated = bool?(:deprecated)
 
     tag = Tag.find(params[:id])
 
-    if tag.nico? && deprecated_given && deprecated
-      return render_unprocessable_entity 'ニコタグは廃止できません．', field: :deprecated
-    end
-
-    return unless validate_tag_rename(tag, name)
-
     if tag.nico? || (category.present? && category == 'nico')
-      return render_unprocessable_entity 'ニコタグは変更できません．', field: :category
+      return render_unprocessable_entity('ニコタグは変更できません．', field: :category)
     end
 
     ApplicationRecord.transaction do
@@ -320,11 +314,8 @@ class TagsController < ApplicationController
       name_changed = name.present? && name != old_name
       wiki_page = tag.tag_name.wiki_page if name_changed
 
-      rename_tag_name!(tag, name) if name_changed
+      tag.tag_name.update!(name:) if name.present?
       tag.update!(category:) if category.present?
-      if deprecated_given && tag.deprecated? != deprecated
-        tag.update!(deprecated_at: deprecated ? Time.current : nil)
-      end
 
       tag.reload
 
@@ -341,178 +332,18 @@ class TagsController < ApplicationController
 
   private
 
-  def material_filter_param default:
-    value = params[:material_filter].to_s.presence
-    return default unless ['present', 'missing', 'any'].include?(value)
-
-    value
-  end
-
-  def build_with_depth_graph material_filter
-    children_by_parent_id = Hash.new { |h, k| h[k] = [] }
-    parent_ids_by_child_id = Hash.new { |h, k| h[k] = [] }
-
-    TagImplication.pluck(:parent_tag_id, :tag_id).each do |parent_id, child_id|
-      children_by_parent_id[parent_id] << child_id
-      parent_ids_by_child_id[child_id] << parent_id
-    end
-
-    tag_ids = (children_by_parent_id.keys +
-               parent_ids_by_child_id.keys +
-               Tag.where(category: ['meme', 'character', 'material']).pluck(:id)).uniq
-
-    material_tag_ids = Material.unscoped.kept.where.not(tag_id: nil).distinct.pluck(:tag_id).to_set
-
-    tags_by_id = Tag.joins(:tag_name)
-                    .where(id: tag_ids)
-                    .pluck('tags.id', 'tag_names.name', 'tags.category', 'tags.deprecated_at')
-                    .each_with_object({ }) do |(id, name, category, deprecated_at), h|
-      h[id] = { name:, category:, deprecated: deprecated_at.present?,
-                has_material: material_tag_ids.include?(id) }
-    end
-
-    { children_by_parent_id:, parent_ids_by_child_id:, tags_by_id:,
-      visible_child_tag_ids_by_parent_id: { },
-      visible_subtree_by_tag_id: { },
-      material_filter: }
-  end
-
-  def visible_root_tag_ids graph
-    root_ids = Set.new
-
-    graph[:tags_by_id].each do |tag_id, attrs|
-      next unless visible_root_tag?(tag_id, graph)
-      next unless visible_subtree?(tag_id, graph)
-
-      if attrs[:deprecated]
-        collect_visible_child_tag_ids(tag_id, graph, root_ids, Set.new)
-      else
-        root_ids << tag_id
-      end
-    end
-
-    root_ids.to_a
-  end
-
-  def visible_root_tag? tag_id, graph
-    seen = Set.new([tag_id])
-    stack = graph[:parent_ids_by_child_id][tag_id].dup
-
-    until stack.empty?
-      parent_id = stack.pop
-      next if seen.include?(parent_id)
-
-      seen << parent_id
-
-      parent = graph[:tags_by_id][parent_id]
-      next unless parent
-
-      return false unless parent[:deprecated]
-
-      stack.concat(graph[:parent_ids_by_child_id][parent_id])
-    end
-
-    true
-  end
-
-  def visible_child_tag_ids parent_tag_id, graph
-    cache = graph[:visible_child_tag_ids_by_parent_id]
-    return cache[parent_tag_id] if cache.key?(parent_tag_id)
-
-    visible_ids = Set.new
-
-    graph[:children_by_parent_id][parent_tag_id].each do |child_tag_id|
-      collect_visible_child_tag_ids(child_tag_id, graph, visible_ids, Set.new([parent_tag_id]))
-    end
-
-    cache[parent_tag_id] = visible_ids.to_a
-  end
-
-  def collect_visible_child_tag_ids tag_id, graph, visible_ids, seen
-    return if seen.include?(tag_id)
-
-    seen = seen.dup << tag_id
-    tag = graph[:tags_by_id][tag_id]
-    return unless tag
-
-    if tag[:deprecated]
-      graph[:children_by_parent_id][tag_id].each do |child_tag_id|
-        collect_visible_child_tag_ids(child_tag_id, graph, visible_ids, seen)
-      end
-      return
-    end
-
-    if with_depth_visible_tag?(tag, graph[:material_filter])
-      visible_ids << tag_id
-      return
-    end
-
-    visible_ids << tag_id if graph[:children_by_parent_id][tag_id].any? { |child_tag_id|
-      visible_subtree?(child_tag_id, graph)
-    }
-  end
-
-  def with_depth_visible_tag? tag, material_filter
-    return false unless tag[:category].in?(['meme', 'character', 'material']) && !tag[:deprecated]
-
-    case material_filter
-    when 'present'
-      tag[:has_material]
-    when 'missing'
-      !tag[:has_material]
-    else
-      true
-    end
-  end
-
-  def visible_subtree? tag_id, graph
-    cache = graph[:visible_subtree_by_tag_id]
-    return cache[tag_id] if cache.key?(tag_id)
-
-    tag = graph[:tags_by_id][tag_id]
-    return cache[tag_id] = false unless tag
-
-    if tag[:deprecated]
-      return cache[tag_id] =
-                 graph[:children_by_parent_id][tag_id].any? { |child_tag_id|
-                   visible_subtree?(child_tag_id, graph)
-                 }
-    end
-
-    cache[tag_id] =
-        with_depth_visible_tag?(tag, graph[:material_filter]) ||
-        graph[:children_by_parent_id][tag_id].any? { |child_tag_id|
-          visible_subtree?(child_tag_id, graph)
-        }
-  end
-
-  def with_depth_lightweight_repr tag_id, graph
-    tag = graph[:tags_by_id][tag_id]
-
-    { id: tag_id,
-      name: tag[:name],
-      category: tag[:category],
-      deprecated: tag[:deprecated],
-      has_material: tag[:has_material],
-      has_children: visible_child_tag_ids(tag_id, graph).present?,
-      children: [] }
-  end
-
-  def build_tag_children tag, graph: nil
+  def build_tag_children tag
     material = tag.materials.first
-    tag_graph = graph && graph[:tags_by_id][tag.id]
-    material =
-        nil if tag_graph && !with_depth_visible_tag?(tag_graph, graph[:material_filter])
-
-    children = tag.children.sort_by(&:name)
-    if graph
-      children = children.filter { |child_tag| visible_subtree?(child_tag.id, graph) }
+    file = nil
+    content_type = nil
+    if material&.file&.attached?
+      file = rails_storage_proxy_url(material.file, only_path: false)
+      content_type = material.file.blob.content_type
     end
 
     TagRepr.base(tag).merge(
-        children: children.map { build_tag_children(_1, graph:) },
-        has_material: tag_graph ? tag_graph[:has_material] : material.present?,
-        material: material && MaterialRepr.base(material, host: request.base_url))
+        children: tag.children.sort_by { _1.name }.map { build_tag_children(_1) },
+        material: material.as_json&.merge(file:, content_type:))
   end
 
   def record_tag_version! tag, event_type:, created_by_user:, name_changed: false, wiki_page: nil
@@ -534,67 +365,6 @@ class TagsController < ApplicationController
         created_by_user:)
   end
 
-  def validate_tag_rename tag, name
-    return true if name.blank? || name == tag.name
-
-    if tag.in?([Tag.tagme, Tag.bot, Tag.no_deerjikist, Tag.video, Tag.niconico])
-      render_unprocessable_entity 'システム・タグの名称は変更できません．', field: :name
-      return false
-    end
-
-    target_tag_name = TagName.with_discarded.find_by(name:)
-    return true if target_tag_name.nil?
-    return true if target_tag_name.canonical_id?
-
-    render_unprocessable_entity 'その名前は既に使はれてゐます．', field: :name
-    false
-  end
-
-  def rename_tag_name! tag, name
-    return if name == tag.name
-
-    current_tag_name = tag.tag_name
-    target_tag_name = TagName.with_discarded.find_by(name:)
-
-    if target_tag_name.nil?
-      current_tag_name.update!(name:)
-      return
-    end
-
-    promote_tag_alias!(
-        tag,
-        current_tag_name:,
-        promoted_tag_name: target_tag_name)
-  end
-
-  def promote_tag_alias! tag, current_tag_name:, promoted_tag_name:
-    old_owner_tag = promoted_tag_name.canonical&.tag
-
-    if old_owner_tag && old_owner_tag != tag
-      TagVersioning.ensure_snapshot!(old_owner_tag, created_by_user: current_user)
-    end
-
-    promoted_tag_name.undiscard! if promoted_tag_name.discarded?
-    promoted_tag_name.update!(canonical: nil)
-
-    TagName.with_discarded
-           .where(canonical_id: current_tag_name.id)
-           .where.not(id: promoted_tag_name.id)
-           .find_each do |alias_tag_name|
-      alias_tag_name.update!(canonical: promoted_tag_name)
-    end
-
-    current_tag_name.wiki_page&.update!(tag_name: promoted_tag_name)
-    tag.update!(tag_name: promoted_tag_name)
-    current_tag_name.association(:wiki_page).reset
-    current_tag_name.association(:tag).reset
-    current_tag_name.reload.update!(canonical: promoted_tag_name)
-
-    return unless old_owner_tag && old_owner_tag != tag
-
-    record_tag_version!(old_owner_tag.reload, event_type: :update, created_by_user: current_user)
-  end
-
   def update_aliases! tag, alias_names
     alias_names = alias_names.uniq
 

backend/app/controllers/wiki_pages_controller.rb

@@ -4,18 +4,17 @@ class WikiPagesController < ApplicationController
   def index
     title = params[:title].to_s.strip
     if title.blank?
-      return render json: WikiPageRepr.base(
-          WikiPage.joins(:tag_name).includes(tag_name: :tag))
+      return render json: WikiPageRepr.base(WikiPage.joins(:tag_name).includes(:tag_name))
     end
 
-    q = WikiPage.joins(:tag_name).includes(tag_name: :tag)
+    q = WikiPage.joins(:tag_name).includes(:tag_name)
         .where('tag_names.name LIKE ?', "%#{ WikiPage.sanitize_sql_like(title) }%")
     render json: WikiPageRepr.base(q.limit(20))
   end
 
   def show
     page = WikiPage.joins(:tag_name)
-                   .includes(tag_name: :tag)
+                   .includes(:tag_name)
                    .find_by(id: params[:id])
     render_wiki_page_or_404 page
   end
@@ -23,7 +22,7 @@ class WikiPagesController < ApplicationController
   def show_by_title
     title = params[:title].to_s.strip
     page = WikiPage.joins(:tag_name)
-                   .includes(tag_name: :tag)
+                   .includes(:tag_name)
                    .find_by(tag_name: { name: title })
     render_wiki_page_or_404 page
   end
@@ -52,7 +51,7 @@ class WikiPagesController < ApplicationController
     from = params[:from].presence
     to = params[:to].presence
 
-    page = WikiPage.joins(:tag_name).includes(tag_name: :tag).find(id)
+    page = WikiPage.joins(:tag_name).includes(:tag_name).find(id)
 
     from_rev = from && page.wiki_revisions.find(from)
     to_rev = to ? page.wiki_revisions.find(to) : page.current_revision
@@ -77,7 +76,6 @@ class WikiPagesController < ApplicationController
 
     render json: { wiki_page_id:      page.id,
                    title:             page.title,
-                   deprecated_at:     page.deprecated_at,
                    older_revision_id: from_rev&.id,
                    newer_revision_id: to_rev.id,
                    diff:              diff_json }
@@ -159,7 +157,7 @@ class WikiPagesController < ApplicationController
   def changes
     id = params[:id].presence
     q = WikiRevision.joins(wiki_page: :tag_name)
-                    .includes(:created_user, wiki_page: { tag_name: :tag })
+                    .includes(:created_user, wiki_page: :tag_name)
                     .order(id: :desc)
     q = q.where(wiki_page_id: id) if id
 
@@ -167,9 +165,7 @@ class WikiPagesController < ApplicationController
       { revision_id:  rev.id,
         pred:         rev.base_revision_id,
         succ:         nil,
-        wiki_page:    { id: rev.wiki_page_id,
-                        title: rev.wiki_page.title,
-                        deprecated_at: rev.wiki_page.deprecated_at },
+        wiki_page:    { id: rev.wiki_page_id, title: rev.wiki_page.title },
         user:         rev.created_user && { id: rev.created_user.id, name: rev.created_user.name },
         kind:         rev.kind,
         message:      rev.message,

backend/app/models/material.rb

@@ -1,9 +1,6 @@
 class Material < ApplicationRecord
   include MyDiscard
 
-  SOURCE_KINDS = ['uri', 'google_drive_path', 'google_drive_file',
-                  'legacy_drive_path'].freeze
-
   default_scope -> { kept }
 
   belongs_to :parent, class_name: 'Material', optional: true
@@ -13,18 +10,9 @@ class Material < ApplicationRecord
   belongs_to :created_by_user, class_name: 'User', optional: true
   belongs_to :updated_by_user, class_name: 'User', optional: true
 
-  has_many :material_versions, dependent: :destroy
-  has_many :material_export_items, dependent: :destroy
-
   has_one_attached :file, dependent: :purge
-  has_one_attached :thumbnail, dependent: :purge
 
-  before_validation :assign_normalized_source_key
-
-  validates :tag_id, uniqueness: true, allow_nil: true
-  validates :source_kind,
-            inclusion: { in: SOURCE_KINDS },
-            allow_blank: true
+  validates :tag_id, presence: true, uniqueness: true
 
   validate :file_must_be_attached
   validate :tag_must_be_material_category
@@ -35,37 +23,8 @@ class Material < ApplicationRecord
     file.blob.content_type
   end
 
-  def file_byte_size
-    return nil unless file&.attached?
-
-    file.blob.byte_size
-  end
-
-  def file_filename
-    return nil unless file&.attached?
-
-    file.blob.filename.to_s
-  end
-
-  def snapshot_export_paths
-    material_export_items.order(:profile).pluck(:profile, :export_path).to_h
-  end
-
   private
 
-  def assign_normalized_source_key
-    if source_kind.blank?
-      self.normalized_source_key = nil
-      return
-    end
-
-    self.normalized_source_key =
-        MaterialSyncSuppression.normalize_source_key(source_kind:,
-                                                     source_uri:,
-                                                     drive_path: source_path,
-                                                     drive_file_id: source_file_id)
-  end
-
   def file_must_be_attached
     return if url.present? || file.attached?
 

backend/app/models/material_export_item.rb

@@ -1,48 +0,0 @@
-class MaterialExportItem < ApplicationRecord
-  VALID_PROFILES = ['legacy_drive'].freeze
-
-  belongs_to :material
-  belongs_to :created_by_user, class_name: 'User', optional: true
-
-  validates :profile, presence: true, inclusion: { in: VALID_PROFILES }
-  validates :export_path, presence: true, uniqueness: { scope: :profile }
-  validates :material_id, uniqueness: { scope: :profile }
-  validate :export_path_must_be_relative_safe_path
-
-  scope :enabled, -> { where(enabled: true) }
-
-  private
-
-  def export_path_must_be_relative_safe_path
-    return if export_path.blank?
-
-    if export_path.start_with?('/')
-      errors.add(:export_path, '絶対パスは使へません．')
-    end
-
-    if export_path.match?(/\A[A-Za-z]:\//)
-      errors.add(:export_path, '絶対パスは使へません．')
-    end
-
-    if export_path.include?('\\')
-      errors.add(:export_path, '/ 区切りで指定してください．')
-    end
-
-    if export_path.include?("\0")
-      errors.add(:export_path, 'NUL は使へません．')
-    end
-
-    parts = export_path.split('/')
-    if export_path.include?('//')
-      errors.add(:export_path, '空の path segment は使へません．')
-    end
-
-    if parts.any? { |part| part.in?(['.', '..']) }
-      errors.add(:export_path, '.. は使へません．')
-    end
-
-    if export_path.end_with?('/')
-      errors.add(:export_path, 'directory path は使へません．')
-    end
-  end
-end

backend/app/models/material_import_block.rb

@@ -1,29 +0,0 @@
-class MaterialImportBlock < ApplicationRecord
-  MATCH_KINDS = ['sha256', 'exact_path', 'path_prefix', 'manual'].freeze
-  REASONS = [
-    'copyright_high_risk',
-    'copyright_takedown',
-    'adult_or_sensitive',
-    'personal_information',
-    'malware_or_dangerous_file',
-    'duplicate_or_low_quality',
-    'source_owner_request',
-    'other'
-  ].freeze
-
-  belongs_to :created_by_user, class_name: 'User', optional: true
-
-  validates :match_kind, presence: true, inclusion: { in: MATCH_KINDS }
-  validates :reason, presence: true, inclusion: { in: REASONS }
-  validates :sha256, length: { is: 64 }, allow_blank: true
-  validate :match_value_must_be_present
-
-  private
-
-  def match_value_must_be_present
-    return if match_kind == 'manual'
-    return if sha256.present? || external_path_pattern.present?
-
-    errors.add(:base, 'sha256 または external_path_pattern は必須です．')
-  end
-end

backend/app/models/material_sync_source.rb

@@ -1,45 +0,0 @@
-class MaterialSyncSource < ApplicationRecord
-  SOURCE_KINDS = ['uri', 'google_drive_path', 'google_drive_file', 'legacy_drive_path'].freeze
-
-  belongs_to :created_by_user, class_name: 'User', optional: true
-  belongs_to :updated_by_user, class_name: 'User', optional: true
-
-  validates :name, presence: true
-  validates :source_kind,
-            presence: true,
-            inclusion: { in: SOURCE_KINDS }
-  validates :profile, presence: true, inclusion: { in: MaterialExportItem::VALID_PROFILES }
-  validate :source_value_must_be_present
-
-  scope :enabled, -> { where(enabled: true) }
-
-  def normalized_source_key
-    MaterialSyncSuppression.normalize_source_key(source_kind:,
-                                                 source_uri:,
-                                                 source_path:,
-                                                 source_file_id:)
-  end
-
-  private
-
-  def source_value_must_be_present
-    return if source_value_present?
-
-    errors.add(:base, '同期元を指定してください．')
-  end
-
-  def source_value_present?
-    case source_kind
-    when 'uri'
-      source_uri.present?
-    when 'google_drive_file'
-      source_file_id.present? || source_uri.present?
-    when 'google_drive_path'
-      source_file_id.present? || source_uri.present?
-    when 'legacy_drive_path'
-      source_path.present?
-    else
-      normalized_source_key.present?
-    end
-  end
-end

backend/app/models/material_sync_suppression.rb

@@ -1,105 +0,0 @@
-class MaterialSyncSuppression < ApplicationRecord
-  SOURCE_KINDS = [
-    'uri',
-    'google_drive_path',
-    'google_drive_path_prefix',
-    'google_drive_file',
-    'legacy_drive_path',
-    'legacy_drive_path_prefix'
-  ].freeze
-
-  REASONS = [
-    'copyright_high_risk',
-    'copyright_takedown',
-    'adult_or_sensitive',
-    'personal_information',
-    'malware_or_dangerous_file',
-    'duplicate_or_low_quality',
-    'source_owner_request',
-    'other'
-  ].freeze
-
-  belongs_to :created_by_user, class_name: 'User', optional: true
-
-  before_validation :assign_normalized_source_key
-
-  validates :source_kind, presence: true, inclusion: { in: SOURCE_KINDS }
-  validates :reason, presence: true, inclusion: { in: REASONS }
-  validates :normalized_source_key, presence: true, uniqueness: true
-  validate :source_value_must_be_present
-  validate :drive_path_must_be_safe_relative_path
-
-  def self.normalize_source_key source_kind:,
-                                source_uri: nil,
-                                drive_path: nil,
-                                drive_file_id: nil,
-                                source_path: nil,
-                                source_file_id: nil
-    kind = source_kind.to_s
-    value =
-        case kind
-        when 'uri'
-          source_uri.to_s.strip
-        when 'google_drive_path', 'google_drive_path_prefix',
-             'legacy_drive_path', 'legacy_drive_path_prefix'
-          (source_path || drive_path).to_s.strip.gsub(%r{/+}, '/')
-        when 'google_drive_file'
-          (source_file_id || drive_file_id).to_s.strip
-        else
-          ''
-        end
-
-    return nil if kind.blank? || value.blank?
-
-    "#{ kind }:#{ value }"
-  end
-
-  private
-
-  def assign_normalized_source_key
-    normalize_path_fields!
-    self.normalized_source_key =
-        self.class.normalize_source_key(source_kind:,
-                                        source_uri:,
-                                        drive_path:,
-                                        drive_file_id:)
-  end
-
-  def source_value_must_be_present
-    return if normalized_source_key.present?
-
-    errors.add(:base, '同期元を指定してください．')
-  end
-
-  def drive_path_must_be_safe_relative_path
-    return unless source_kind.in?(
-        ['google_drive_path', 'google_drive_path_prefix',
-         'legacy_drive_path', 'legacy_drive_path_prefix'])
-
-    value = drive_path.to_s
-    return if value.blank?
-
-    if value.start_with?('/') || value.match?(/\A[A-Za-z]:\//)
-      errors.add(:drive_path, '相対 path を指定してください．')
-    end
-    if value.start_with?('My Drive/', 'マイドライブ/')
-      errors.add(:drive_path, '同期元フォルダからの相対 path を指定してください．')
-    end
-    errors.add(:drive_path, 'NUL は使へません．') if value.include?("\0")
-    errors.add(:drive_path, '連続スラッシュは使へません．') if value.include?('//')
-    errors.add(:drive_path, '末尾スラッシュは使へません．') if value.end_with?('/')
-
-    parts = value.split('/')
-    if parts.any? { |part| part.in?(['.', '..']) }
-      errors.add(:drive_path, '. や .. は使へません．')
-    end
-  end
-
-  def normalize_path_fields!
-    return unless source_kind.in?(
-        ['google_drive_path', 'google_drive_path_prefix',
-         'legacy_drive_path', 'legacy_drive_path_prefix'])
-
-    self.drive_path = drive_path.to_s.tr('\\', '/').strip.presence
-  end
-end

backend/app/models/material_version.rb

@@ -1,17 +0,0 @@
-class MaterialVersion < ApplicationRecord
-  EVENT_TYPE_MAP = { create: 'create',
-                     update: 'update',
-                     discard: 'discard',
-                     restore: 'restore' }.freeze
-
-  include VersionRecord
-
-  belongs_to :material
-  belongs_to :tag, optional: true
-  belongs_to :parent, class_name: 'Material', optional: true
-  belongs_to :updated_by_user, class_name: 'User', optional: true
-
-  def export_paths_hash
-    export_paths_json || {}
-  end
-end

backend/app/models/post.rb

@@ -1,19 +1,5 @@
 class Post < ApplicationRecord
   require 'mini_magick'
-  require 'stringio'
-
-  def self.resized_thumbnail_attachment(upload)
-    upload.rewind
-    image = MiniMagick::Image.read(upload.read)
-    image.resize '180x180'
-    image.format 'jpg'
-
-    { io: StringIO.new(image.to_blob),
-      filename: 'resized_thumbnail.jpg',
-      content_type: 'image/jpeg' }
-  ensure
-    upload.rewind
-  end
 
   belongs_to :uploaded_user, class_name: 'User', optional: true
 
@@ -21,8 +7,6 @@ class Post < ApplicationRecord
   has_many :active_post_tags, -> { kept }, class_name: 'PostTag', inverse_of: :post
   has_many :post_tags_with_discarded, -> { with_discarded }, class_name: 'PostTag'
   has_many :tags, through: :active_post_tags
-  has_many :active_tags, -> { where(tags: { deprecated_at: nil }) },
-           through: :active_post_tags, source: :tag
 
   has_many :user_post_views, dependent: :delete_all
   has_many :post_similarities, dependent: :delete_all
@@ -101,7 +85,12 @@ class Post < ApplicationRecord
   def resized_thumbnail!
     return unless thumbnail.attached?
 
-    thumbnail.attach(self.class.resized_thumbnail_attachment(StringIO.new(thumbnail.download)))
+    image = MiniMagick::Image.read(thumbnail.download)
+    image.resize '180x180'
+    thumbnail.purge
+    thumbnail.attach(io:            File.open(image.path),
+                     filename:      'resized_thumbnail.jpg',
+                     content_type:  'image/jpeg')
   end
 
   private

backend/app/models/tag.rb

@@ -8,15 +8,6 @@ class Tag < ApplicationRecord
     ;
   end
 
-  class DeprecatedTagNormalisationError < ArgumentError
-    attr_reader :tag_names
-
-    def initialize tag_names
-      @tag_names = Array(tag_names)
-      super('deprecated tags are not allowed')
-    end
-  end
-
   has_many :post_tags, inverse_of: :tag
   has_many :active_post_tags, -> { kept }, class_name: 'PostTag', inverse_of: :tag
   has_many :post_tags_with_discarded, -> { with_discarded }, class_name: 'PostTag'
@@ -67,7 +58,6 @@ class Tag < ApplicationRecord
   validate :nico_tag_name_must_start_with_nico
   validate :tag_name_must_be_canonical
   validate :category_must_be_deerjikist_with_deerjikists
-  validate :nico_tags_cannot_be_deprecated
 
   scope :nico_tags, -> { nico }
 
@@ -87,8 +77,6 @@ class Tag < ApplicationRecord
     (self.tag_name ||= build_tag_name).name = val
   end
 
-  def deprecated? = deprecated_at?
-
   def has_wiki = wiki_page.present?
 
   def material_id = materials.first&.id
@@ -104,8 +92,7 @@ class Tag < ApplicationRecord
 
   def self.normalise_tags! tag_names, with_tagme: true,
                                       with_no_deerjikist: true,
-                                      deny_nico: true,
-                                      deny_deprecated: false
+                                      deny_nico: true
     if deny_nico && tag_names.any? { |n| n.downcase.start_with?('nico:') }
       raise NicoTagNormalisationError
     end
@@ -114,10 +101,6 @@ class Tag < ApplicationRecord
       pf, cat = CATEGORY_PREFIXES.find { |p, _| name.downcase.start_with?(p) } || ['', nil]
       name = TagName.canonicalise(name.sub(/\A#{ pf }/i, '')).first
       find_or_create_by_tag_name!(name, category: (cat || :general)).tap do |tag|
-        if deny_deprecated && tag.deprecated?
-          raise DeprecatedTagNormalisationError, [tag.name]
-        end
-
         tag.update!(category: cat) if cat && tag.category != cat
       end
     end
@@ -245,10 +228,4 @@ class Tag < ApplicationRecord
       errors.add :category, 'ニジラーと紐づいてゐるタグはニジラー・カテゴリである必要があります．'
     end
   end
-
-  def nico_tags_cannot_be_deprecated
-    if nico? && deprecated_at.present?
-      errors.add :deprecated_at, 'ニコタグは廃止できません．'
-    end
-  end
 end

backend/app/models/tag_implication.rb

@@ -6,7 +6,6 @@ class TagImplication < ApplicationRecord
   validates :parent_tag_id, presence: true
 
   validate :parent_tag_mustnt_be_itself
-  validate :parent_tag_mustnt_create_cycle
 
   private
 
@@ -15,27 +14,4 @@ class TagImplication < ApplicationRecord
       errors.add :parent_tag_id, '親タグは子タグと同一であってはなりません．'
     end
   end
-
-  def parent_tag_mustnt_create_cycle
-    return if tag_id.blank? || parent_tag_id.blank?
-    return if errors[:parent_tag_id].present?
-
-    seen = { }
-    stack = [parent_tag_id]
-
-    until stack.empty?
-      current_id = stack.pop
-      next if seen[current_id]
-
-      seen[current_id] = true
-
-      if current_id == tag_id
-        errors.add :parent_tag_id, '親タグに子孫タグを指定すると循環します．'
-        errors.add :base, 'タグの親子関係が循環します．'
-        return
-      end
-
-      stack.concat(TagImplication.where(tag_id: current_id).pluck(:parent_tag_id))
-    end
-  end
 end

backend/app/models/version_record.rb

@@ -1,23 +1,15 @@
 module VersionRecord
   extend ActiveSupport::Concern
 
-  DEFAULT_EVENT_TYPE_MAP = { create: 'create',
-                             update: 'update',
-                             discard: 'discard',
-                             restore: 'restore' }.freeze
-
   def readonly? = persisted?
 
   included do
-    event_type_map = if const_defined?(:EVENT_TYPE_MAP, false)
-                       const_get(:EVENT_TYPE_MAP)
-                     else
-                       DEFAULT_EVENT_TYPE_MAP
-                     end
-
     belongs_to :created_by_user, class_name: 'User', optional: true
 
-    enum :event_type, event_type_map, prefix: true, validate: true
+    enum :event_type, { create: 'create',
+                        update: 'update',
+                        discard: 'discard',
+                        restore: 'restore' }, prefix: true, validate: true
 
     validates :version_no, presence: true, numericality: { only_integer: true, greater_than: 0 }
     validates :event_type, presence: true

backend/app/models/wiki_page.rb

@@ -22,7 +22,6 @@ class WikiPage < ApplicationRecord
   validates :body, presence: true
 
   def title = tag_name.name
-  def deprecated_at = tag_name.tag&.deprecated_at
 
   def title= val
     (self.tag_name ||= build_tag_name).name = val

backend/app/representations/material_repr.rb

@@ -2,9 +2,7 @@
 
 
 module MaterialRepr
-  BASE = { only: [:id, :url, :version_no, :source_kind, :source_uri,
-                  :source_path, :source_file_id, :normalized_source_key,
-                  :created_at, :updated_at],
+  BASE = { only: [:id, :url, :created_at, :updated_at],
            methods: [:content_type],
            include: { tag: TagRepr::BASE,
                       created_by_user: UserRepr::BASE,
@@ -17,93 +15,10 @@ module MaterialRepr
         file: if material.file.attached?
                 Rails.application.routes.url_helpers.rails_storage_proxy_url(
                     material.file, host:)
-              end,
-        thumbnail: thumbnail_url(material, host:),
-        thumbnail_fallback_text: thumbnail_fallback_text(material),
-        thumbnail_fallback_kind: thumbnail_fallback_kind(material),
-        media_kind: media_kind(material),
-        file_byte_size: material.file_byte_size,
-        export_paths: export_paths(material),
-        export_items: export_items(material))
+              end)
   end
 
   def many materials, host:
     materials.map { |m| base(m, host:) }
   end
-
-  def list material, host:
-    { id: material.id,
-      version_no: material.version_no,
-      url: material.url,
-      source_kind: material.source_kind,
-      source_uri: material.source_uri,
-      source_path: material.source_path,
-      source_file_id: material.source_file_id,
-      normalized_source_key: material.normalized_source_key,
-      tag: compact_tag(material.tag),
-      thumbnail: thumbnail_url(material, host:),
-      thumbnail_fallback_text: thumbnail_fallback_text(material),
-      thumbnail_fallback_kind: thumbnail_fallback_kind(material),
-      media_kind: media_kind(material),
-      content_type: material.content_type,
-      file_byte_size: material.file_byte_size,
-      created_at: material.created_at,
-      updated_at: material.updated_at,
-      export_paths: export_paths(material),
-      export_items: export_items(material) }
-  end
-
-  def list_many materials, host:
-    materials.map { |m| list(m, host:) }
-  end
-
-  def export_paths material
-    material.material_export_items.each_with_object({ }) do |item, hash|
-      hash[item.profile] = item.enabled ? item.export_path : ''
-    end
-  end
-
-  def export_items material
-    material.material_export_items.map do |item|
-      { id: item.id,
-        profile: item.profile,
-        export_path: item.export_path,
-        enabled: item.enabled }
-    end
-  end
-
-  def thumbnail_url material, host:
-    return nil unless material.thumbnail.attached?
-
-    Rails.application.routes.url_helpers.rails_storage_proxy_url(
-        material.thumbnail, host:)
-  end
-
-  def thumbnail_fallback_text material
-    material.tag&.name || material.created_at&.strftime('%Y-%m-%d')
-  end
-
-  def thumbnail_fallback_kind material
-    material.tag.present? ? 'tag_name' : 'created_at'
-  end
-
-  def media_kind material
-    return 'url_only' unless material.file.attached?
-
-    content_type = material.file.blob.content_type.to_s
-    return 'image' if content_type.start_with?('image/')
-    return 'video' if content_type.start_with?('video/')
-    return 'audio' if content_type.start_with?('audio/')
-
-    'file_other'
-  end
-
-  def compact_tag tag
-    return nil unless tag
-
-    { id: tag.id,
-      name: tag.name,
-      category: tag.category,
-      deprecated_at: tag.deprecated_at }
-  end
 end

backend/app/representations/post_repr.rb

@@ -53,7 +53,7 @@ module PostRepr
   end
 
   def tag_json tags
-    tags.reject(&:deprecated?).map { |tag| TagRepr.inline(tag) }
+    tags.map { |tag| TagRepr.inline(tag) }
   end
 
   def thumbnail_url post

backend/app/representations/tag_repr.rb

@@ -2,7 +2,7 @@
 
 
 module TagRepr
-  BASE = { only: [:id, :category, :post_count, :created_at, :updated_at, :deprecated_at],
+  BASE = { only: [:id, :category, :post_count, :created_at, :updated_at],
            methods: [:name, :has_wiki, :material_id, :has_deerjikists] }.freeze
 
   module_function

backend/app/representations/wiki_page_repr.rb

@@ -2,7 +2,7 @@
 
 
 module WikiPageRepr
-  BASE = { methods: [:title, :deprecated_at] }.freeze
+  BASE = { methods: [:title] }.freeze
 
   module_function
 

backend/app/services/google_drive/api_client.rb

@@ -1,233 +0,0 @@
-require 'json'
-require 'jwt'
-require 'net/http'
-require 'openssl'
-require 'tempfile'
-require 'uri'
-
-
-module GoogleDrive
-  class ApiClient
-    DRIVE_ENDPOINT = 'https://www.googleapis.com/drive/v3'
-    TOKEN_ENDPOINT = 'https://oauth2.googleapis.com/token'
-    FOLDER_MIME_TYPE = 'application/vnd.google-apps.folder'
-    NATIVE_FILE_MIME_TYPE_PREFIX = 'application/vnd.google-apps.'
-    DRIVE_SCOPE = 'https://www.googleapis.com/auth/drive.readonly'
-
-    def initialize service_account_email: ENV['GOOGLE_DRIVE_SERVICE_ACCOUNT_EMAIL'],
-                   private_key: ENV['GOOGLE_DRIVE_PRIVATE_KEY'],
-                   private_key_path: ENV['GOOGLE_DRIVE_PRIVATE_KEY_PATH'],
-                   subject: ENV['GOOGLE_DRIVE_SUBJECT']
-      @service_account_email = service_account_email.to_s
-      @private_key = load_private_key(private_key, private_key_path)
-      @subject = subject.to_s.presence
-      @access_token = nil
-    end
-
-    def list_material_files_under_folder folder_id
-      files = []
-      each_material_file_under_folder(folder_id) { |entry| files << entry }
-      files
-    end
-
-    def each_material_file_under_folder folder_id
-      return enum_for(__method__, folder_id) unless block_given?
-
-      walk_folder(folder_id, nil) do |entry, relative_path|
-        next if entry['mimeType'] == FOLDER_MIME_TYPE
-        next if native_file?(entry['mimeType'])
-
-        yield build_file_entry(entry, relative_path)
-      end
-    end
-
-    def fetch_material_file file_id
-      metadata = get_file(file_id)
-      return nil if native_file?(metadata['mimeType'])
-
-      build_file_entry(metadata, metadata['name'])
-    end
-
-    def download_to_tempfile file_id, filename:
-      tempfile = Tempfile.new(['material-sync', File.extname(filename.to_s)])
-      tempfile.binmode
-      request_binary("/files/#{ file_id }",
-                     { alt: 'media', supportsAllDrives: true }) do |chunk|
-        tempfile.write(chunk.b)
-      end
-      tempfile.rewind
-      tempfile
-    rescue StandardError
-      tempfile&.close!
-      raise
-    end
-
-    def extract_file_id value
-      raw = value.to_s.strip
-      return nil if raw.blank?
-      return raw unless raw.include?('/')
-
-      uri = URI.parse(raw)
-      return uri.query.to_s[%r{(?:^|&)id=([^&]+)}, 1] if uri.query.present?
-      return uri.path[%r{/folders/([^/]+)}, 1] if uri.path.include?('/folders/')
-
-      uri.path[%r{/d/([^/]+)}, 1]
-    rescue URI::InvalidURIError
-      nil
-    end
-
-    private
-
-    def walk_folder folder_id, prefix, &block
-      list_children(folder_id).each do |entry|
-        relative_path = MaterialSyncExportPath.build(prefix:,
-                                                     relative_path: entry['name'])
-        if entry['mimeType'] == FOLDER_MIME_TYPE
-          walk_folder(entry['id'], relative_path, &block)
-          next
-        end
-
-        block.call(entry, relative_path)
-      end
-    end
-
-    def build_file_entry entry, relative_path
-      { id: entry['id'],
-        name: entry['name'],
-        mime_type: entry['mimeType'],
-        relative_path: MaterialSyncExportPath.normalize_path(relative_path),
-        sha256_checksum: entry['sha256Checksum'],
-        web_view_link: entry['webViewLink'],
-        web_content_link: entry['webContentLink'] }
-    end
-
-    def list_children folder_id
-      files = []
-      page_token = nil
-
-      loop do
-        response =
-            request_json('/files', {
-                q: "'#{ folder_id }' in parents and trashed = false",
-                fields: 'nextPageToken,files(id,name,mimeType,sha256Checksum,' \
-                        'webViewLink,webContentLink)',
-                orderBy: 'folder,name',
-                pageSize: 1000,
-                supportsAllDrives: true,
-                includeItemsFromAllDrives: true,
-                pageToken: page_token }.compact)
-        files.concat(response.fetch('files'))
-        page_token = response['nextPageToken']
-        break if page_token.blank?
-      end
-
-      files
-    end
-
-    def get_file file_id
-      request_json("/files/#{ file_id }",
-                   fields: 'id,name,mimeType,sha256Checksum,webViewLink,webContentLink',
-                   supportsAllDrives: true)
-    end
-
-    def request_json path, params = {}
-      response = request(:get, path, params:)
-      unless response.is_a?(Net::HTTPSuccess)
-        raise "Google Drive API error: #{ response.code } #{ response.body }"
-      end
-
-      JSON.parse(response.body)
-    end
-
-    def request_binary path, params = {}
-      request(:get, path, params:) do |response|
-        unless response.is_a?(Net::HTTPSuccess)
-          raise "Google Drive download error: #{ response.code } #{ response.body }"
-        end
-
-        response.read_body do |chunk|
-          yield chunk.b
-        end
-      end
-    end
-
-    def request method, path, params: nil
-      uri = URI(DRIVE_ENDPOINT + path)
-      uri.query = URI.encode_www_form(params) if params.present?
-
-      klass =
-          case method
-          when :get
-            Net::HTTP::Get
-          else
-            raise ArgumentError, "Unsupported Google Drive request method: #{ method }"
-          end
-      request = klass.new(uri)
-      request['Authorization'] = "Bearer #{ access_token }"
-
-      Net::HTTP.start(uri.host,
-                      uri.port,
-                      use_ssl: true,
-                      open_timeout: 10,
-                      read_timeout: 60) do |http|
-        if block_given?
-          http.request(request) do |response|
-            return yield response
-          end
-        else
-          http.request(request)
-        end
-      end
-    end
-
-    def access_token
-      @access_token ||= fetch_access_token
-    end
-
-    def fetch_access_token
-      raise 'GOOGLE_DRIVE_SERVICE_ACCOUNT_EMAIL is required' if @service_account_email.blank?
-      raise 'Google Drive private key is required' if @private_key.blank?
-
-      payload = { iss: @service_account_email,
-                  scope: DRIVE_SCOPE,
-                  aud: TOKEN_ENDPOINT,
-                  exp: 1.hour.from_now.to_i,
-                  iat: Time.current.to_i }
-      payload[:sub] = @subject if @subject.present?
-
-      assertion = JWT.encode(payload, @private_key, 'RS256')
-      uri = URI(TOKEN_ENDPOINT)
-      request = Net::HTTP::Post.new(uri)
-      request.set_form_data(
-          grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',
-          assertion:)
-
-      response =
-          Net::HTTP.start(uri.host,
-                          uri.port,
-                          use_ssl: true,
-                          open_timeout: 10,
-                          read_timeout: 30) do |http|
-            http.request(request)
-          end
-      unless response.is_a?(Net::HTTPSuccess)
-        raise "Google OAuth error: #{ response.code } #{ response.body }"
-      end
-
-      JSON.parse(response.body).fetch('access_token')
-    end
-
-    def load_private_key private_key, private_key_path
-      raw = private_key.to_s
-      raw = raw.gsub('\n', "\n") if raw.present?
-      raw = File.read(private_key_path) if raw.blank? && private_key_path.present?
-      return nil if raw.blank?
-
-      OpenSSL::PKey::RSA.new(raw)
-    end
-
-    def native_file? mime_type
-      mime_type.to_s.start_with?(NATIVE_FILE_MIME_TYPE_PREFIX)
-    end
-  end
-end

backend/app/services/material_file_sha256.rb

@@ -1,57 +0,0 @@
-require 'digest'
-require 'json'
-
-class MaterialFileSha256
-  def self.blob_metadata blob
-    metadata = blob.metadata
-    return metadata if metadata.is_a?(Hash)
-    return { } if metadata.blank?
-
-    JSON.parse(metadata)
-  rescue JSON::ParserError
-    { }
-  end
-
-  def self.metadata_sha256 blob
-    blob_metadata(blob)['sha256'].presence
-  end
-
-  def self.assign_metadata_sha256! blob, sha256
-    return if sha256.blank?
-
-    metadata = blob_metadata(blob)
-    metadata['sha256'] = sha256
-    blob.metadata = metadata
-    blob.save! if blob.changed?
-  end
-
-  def self.from_blob blob, allow_download: false
-    sha256 = metadata_sha256(blob)
-    return sha256 if sha256.present?
-    return nil unless allow_download
-
-    begin
-      blob.open do |file|
-        sha256 = Digest::SHA256.file(file.path).hexdigest
-        assign_metadata_sha256!(blob, sha256)
-        sha256
-      end
-    rescue ActiveStorage::FileNotFoundError, ArgumentError => error
-      Rails.logger.warn(
-          "MaterialFileSha256.from_blob failed for blob_id=#{blob.id}: " \
-          "#{error.class}: #{error.message}",
-      )
-      nil
-    end
-  end
-
-  def self.from_upload upload
-    tempfile = upload&.tempfile
-    return nil unless tempfile
-
-    tempfile.rewind
-    Digest::SHA256.file(tempfile.path).hexdigest.tap do
-      tempfile.rewind
-    end
-  end
-end

backend/app/services/material_import_block_matcher.rb

@@ -1,7 +0,0 @@
-class MaterialImportBlockMatcher
-  def self.match_for_sha256 sha256
-    return nil if sha256.blank?
-
-    MaterialImportBlock.find_by(match_kind: 'sha256', sha256:)
-  end
-end

backend/app/services/material_sync_export_path.rb

@@ -1,56 +0,0 @@
-class MaterialSyncExportPath
-  class << self
-    def build prefix: nil, relative_path: nil, filename: nil, source_file_id: nil
-      path = normalize_path(relative_path)
-      path = fallback_filename(filename, source_file_id) if path.blank?
-
-      normalized_prefix = normalize_path(prefix)
-      return path if normalized_prefix.blank?
-      return normalized_prefix if path.blank?
-
-      [normalized_prefix, path].join('/')
-    end
-
-    def normalize_path path
-      raw = path.to_s.delete("\0").tr('\\', '/').strip
-      raw = raw.sub(%r{\A[A-Za-z]:/+}, '')
-      raw = raw.sub(%r{\A/+}, '')
-      return nil if raw.blank?
-
-      segments = raw.split('/').filter_map do |segment|
-        normalized = normalize_segment(segment)
-        normalized.presence
-      end
-      return nil if segments.empty?
-
-      segments.join('/')
-    end
-
-    def uniquify path, source_file_id
-      normalized = normalize_path(path)
-      return normalized if normalized.blank? || source_file_id.blank?
-
-      ext = File.extname(normalized)
-      base = ext.present? ? normalized.delete_suffix(ext) : normalized
-      "#{ base }--#{ source_file_id }#{ ext }"
-    end
-
-    private
-
-    def fallback_filename filename, source_file_id
-      name = normalize_path(filename)
-      return name if name.present?
-      return nil if source_file_id.blank?
-
-      source_file_id.to_s
-    end
-
-    def normalize_segment segment
-      cleaned = segment.to_s.delete("\0").tr('\\/', '_').strip
-      return nil if cleaned.blank? || cleaned == '.'
-      return '__' if cleaned == '..'
-
-      cleaned
-    end
-  end
-end

backend/app/services/material_sync_importer.rb

@@ -1,259 +0,0 @@
-require 'digest'
-
-class MaterialSyncImporter
-  Result = Struct.new(:material, :action, :suppressed, :suppression, keyword_init: true)
-
-  def self.import! attributes
-    new(attributes).import!
-  end
-
-  def initialize attributes
-    @attributes = attributes
-  end
-
-  def import!
-    source = source_attributes
-    key = normalized_source_key(source)
-    raise ArgumentError, 'normalized_source_key is required for material sync' if key.blank?
-
-    suppression = suppression_for(source)
-    if suppression
-      return Result.new(material: nil,
-                        action: :suppressed,
-                        suppressed: true,
-                        suppression:)
-    end
-
-    material =
-        Material
-        .unscoped
-        .find_or_initialize_by(normalized_source_key: key)
-    if unchanged?(material, source)
-      return Result.new(material:,
-                        action: :unchanged,
-                        suppressed: false,
-                        suppression: nil)
-    end
-
-    event_type =
-        if material.new_record?
-          :create
-        elsif material.discarded?
-          :restore
-        else
-          :update
-        end
-    uploaded_blob = uploaded_blob!
-    if @import_block
-      return Result.new(material: nil,
-                        action: :suppressed,
-                        suppressed: true,
-                        suppression: @import_block)
-    end
-
-    Material.transaction do
-      if material.persisted?
-        MaterialVersionRecorder.ensure_snapshot!(material,
-                                                 created_by_user: @attributes[:updated_by_user])
-      end
-      material.assign_attributes(material_attributes_for(material).merge(source))
-      material.discarded_at = nil if material.respond_to?(:discarded_at=)
-      material.file.attach(uploaded_blob) if uploaded_blob
-      material.save!
-      upsert_export_item!(material)
-      MaterialVersionRecorder.record!(material:,
-                                      event_type:,
-                                      created_by_user: @attributes[:updated_by_user])
-    end
-    MaterialThumbnailGenerator.generate!(material)
-
-    Result.new(material:,
-               action: event_type == :create ? :imported : :updated,
-               suppressed: false,
-               suppression: nil)
-  rescue StandardError
-    uploaded_blob&.purge_later
-    raise
-  ensure
-    close_tempfile!
-  end
-
-  private
-
-  def source_attributes
-    { source_kind: @attributes[:source_kind],
-      source_uri: @attributes[:source_uri],
-      source_path: @attributes[:source_path],
-      source_file_id: @attributes[:source_file_id] }
-  end
-
-  def normalized_source_key source
-    MaterialSyncSuppression.normalize_source_key(source_kind: source[:source_kind],
-                                                 source_uri: source[:source_uri],
-                                                 source_path: source[:source_path],
-                                                 source_file_id: source[:source_file_id])
-  end
-
-  def material_attributes_for material
-    attrs =
-        @attributes
-        .except(:source_kind, :source_uri, :source_path, :source_file_id,
-                :file_blob, :file_tempfile, :file_downloader,
-                :filename, :content_type,
-                :file_sha256, :export_path, :profile, :tag, :url)
-
-    if material.new_record?
-      attrs[:tag] = @attributes[:tag] if @attributes.key?(:tag)
-      attrs[:url] = @attributes[:url] if @attributes.key?(:url)
-      return attrs
-    end
-
-    if @attributes.key?(:tag) && @attributes[:tag].present?
-      attrs[:tag] = @attributes[:tag]
-    end
-    if @attributes.key?(:url) && @attributes[:url].present?
-      attrs[:url] = @attributes[:url]
-    end
-
-    attrs
-  end
-
-  def suppression_for source
-    if source[:source_kind] == 'google_drive_file' && source[:source_path].present?
-      return MaterialSyncSuppressionMatcher.match_google_drive_candidate(
-          drive_file_id: source[:source_file_id],
-          relative_path: source[:source_path])
-    end
-
-    MaterialSyncSuppressionMatcher.match(**source)
-  end
-
-  def uploaded_blob!
-    return @attributes[:file_blob] if @attributes[:file_blob]
-
-    tempfile = upload_tempfile
-    return nil unless tempfile
-
-    tempfile.rewind
-    file_sha256 = @attributes[:file_sha256] || Digest::SHA256.file(tempfile.path).hexdigest
-    @attributes[:file_sha256] = file_sha256
-
-    @import_block = MaterialImportBlockMatcher.match_for_sha256(file_sha256)
-    if @import_block
-      tempfile.rewind
-      return nil
-    end
-
-    blob = ActiveStorage::Blob.create_and_upload!(
-        io: tempfile,
-        filename: @attributes[:filename],
-        content_type: @attributes[:content_type])
-    MaterialFileSha256.assign_metadata_sha256!(blob, file_sha256)
-    tempfile.rewind
-    blob
-  end
-
-  def upload_tempfile
-    return @upload_tempfile if defined?(@upload_tempfile)
-
-    @upload_tempfile = @attributes[:file_tempfile]
-    if @upload_tempfile.blank? && @attributes[:file_downloader]
-      @upload_tempfile = @attributes[:file_downloader].call
-    end
-    @upload_tempfile
-  end
-
-  def upsert_export_item! material
-    export_path = resolved_export_path(material)
-    return if export_path.blank?
-
-    item = material.material_export_items.find_or_initialize_by(profile: effective_profile)
-    item.export_path = export_path
-    item.enabled = true
-    item.created_by_user ||= @attributes[:created_by_user]
-    item.save!
-  end
-
-  def export_path_taken_by_other? material, profile, export_path
-    MaterialExportItem
-      .where(profile:, export_path:)
-      .where.not(material_id: material.id)
-      .exists?
-  end
-
-  def close_tempfile!
-    tempfile = upload_tempfile
-    return unless tempfile
-
-    tempfile.close! unless tempfile.closed?
-  rescue StandardError
-    nil
-  end
-
-  def unchanged? material, source
-    return false if material.new_record? || material.discarded?
-    return false unless same_source_attributes?(material, source)
-    return false unless same_export_path?(material)
-    return false unless same_material_attributes?(material)
-
-    same_file_snapshot?(material)
-  end
-
-  def same_source_attributes? material, source
-    material.source_kind == source[:source_kind] \
-      && material.source_uri == source[:source_uri] \
-      && material.source_path == source[:source_path] \
-      && material.source_file_id == source[:source_file_id]
-  end
-
-  def same_export_path? material
-    expected = resolved_export_path(material)
-    current = material.material_export_items.find { |item| item.profile == effective_profile }
-
-    return current.blank? if expected.blank?
-
-    current&.enabled && current.export_path == expected
-  end
-
-  def same_material_attributes? material
-    same_tag_attribute?(material) && same_url_attribute?(material)
-  end
-
-  def same_file_snapshot? material
-    expected_sha256 = @attributes[:file_sha256].to_s.presence
-
-    if expected_sha256.present?
-      return false unless material.file.attached?
-
-      return MaterialFileSha256.metadata_sha256(material.file.blob) == expected_sha256
-    end
-
-    !material.file.attached?
-  end
-
-  def effective_profile
-    @attributes[:profile].presence || 'legacy_drive'
-  end
-
-  def resolved_export_path material
-    export_path = @attributes[:export_path].to_s.strip
-    return export_path if export_path.blank?
-    return export_path unless export_path_taken_by_other?(material, effective_profile, export_path)
-
-    MaterialSyncExportPath.uniquify(export_path, @attributes[:source_file_id])
-  end
-
-  def same_tag_attribute? material
-    return true unless @attributes.key?(:tag)
-    return true if @attributes[:tag].blank?
-
-    material.tag_id == @attributes[:tag].id
-  end
-
-  def same_url_attribute? material
-    return true unless @attributes.key?(:url)
-    return true if @attributes[:url].blank?
-
-    material.url == @attributes[:url]
-  end
-end

backend/app/services/material_sync_runner.rb

@@ -1,251 +0,0 @@
-class MaterialSyncRunner
-  Result = Struct.new(:imported, :updated, :unchanged, :suppressed, :failed,
-                      :errors, keyword_init: true)
-
-  def self.sync_enabled!
-    results = MaterialSyncSource.enabled.order(:id).map { |source| new(source).sync! }
-
-    Result.new(imported: results.sum(&:imported),
-               updated: results.sum(&:updated),
-               unchanged: results.sum(&:unchanged),
-               suppressed: results.sum(&:suppressed),
-               failed: results.sum(&:failed),
-               errors: results.flat_map(&:errors))
-  end
-
-  def initialize source
-    @source = source
-  end
-
-  def sync!
-    result = Result.new(imported: 0, updated: 0, unchanged: 0,
-                        suppressed: 0, failed: 0, errors: [])
-
-    if @source.source_kind == 'google_drive_path'
-      sync_google_drive_path!(result)
-    else
-      candidates.each do |candidate|
-        next if candidate.blank?
-
-        sync_candidate!(candidate, result)
-      end
-    end
-
-    @source.update!(last_synced_at: Time.current)
-    log_result(result)
-    result
-  rescue NotImplementedError, StandardError => e
-    result.failed += 1
-    result.errors << { source_id: @source.id, error: e.message }
-    log_result(result)
-    result
-  end
-
-  private
-
-  def candidates
-    case @source.source_kind
-    when 'uri'
-      [uri_candidate]
-    when 'google_drive_file'
-      [google_drive_file_candidate]
-    when 'legacy_drive_path'
-      raise NotImplementedError, 'legacy_drive_path material sync is not implemented'
-    else
-      raise NotImplementedError, "Unsupported material sync source_kind: #{ @source.source_kind }"
-    end
-  end
-
-  def uri_candidate
-    { source_kind: @source.source_kind,
-      source_uri: @source.source_uri,
-      source_path: @source.source_path,
-      source_file_id: @source.source_file_id,
-      url: @source.source_uri,
-      tag: nil,
-      created_by_user: @source.created_by_user,
-      updated_by_user: @source.updated_by_user || @source.created_by_user }
-  end
-
-  def sync_candidate! candidate, result
-    block = MaterialImportBlockMatcher.match_for_sha256(candidate[:file_sha256])
-    if block
-      result.suppressed += 1
-      Rails.logger.info(
-          material_sync_log(action: 'suppressed',
-                            reason: block.reason,
-                            normalized_source_key: candidate_normalized_source_key(candidate)))
-      return
-    end
-
-    suppression = suppression_for(candidate)
-
-    if suppression
-      result.suppressed += 1
-      Rails.logger.info(
-          material_sync_log(action: 'suppressed',
-                            normalized_source_key: suppression.normalized_source_key))
-      return
-    end
-
-    import = MaterialSyncImporter.import!(candidate)
-    result.public_send("#{ import.action }=", result.public_send(import.action) + 1)
-  rescue StandardError => e
-    result.failed += 1
-    result.errors << { source_id: @source.id,
-                       normalized_source_key: candidate_normalized_source_key(candidate),
-                       error: e.message }
-    Rails.logger.warn(
-        material_sync_log(action: 'failed',
-                          error: e.message,
-                          normalized_source_key: candidate_normalized_source_key(candidate)))
-  ensure
-    close_candidate_tempfile(candidate)
-  end
-
-  def google_drive_path_candidates
-    folder_id = google_drive_folder_id
-    Enumerator.new do |entries|
-      drive_client.each_material_file_under_folder(folder_id).each do |entry|
-        entries << build_google_drive_candidate(entry)
-      end
-    end
-  end
-
-  def sync_google_drive_path! result
-    folder_id = google_drive_folder_id
-    scanned_count = 0
-
-    drive_client.each_material_file_under_folder(folder_id) do |entry|
-      scanned_count += 1
-      sync_candidate!(build_google_drive_candidate(entry), result)
-      log_google_drive_progress(folder_id, scanned_count, result) if progress_log_scan_count?(scanned_count)
-    end
-
-    log_google_drive_progress(folder_id, scanned_count, result, summary: true)
-  end
-
-  def google_drive_file_candidate
-    entry = drive_client.fetch_material_file(google_drive_file_id)
-    return nil unless entry
-
-    build_google_drive_candidate(entry, single_file: true)
-  end
-
-  def build_google_drive_candidate entry, single_file: false
-    relative_path =
-        if single_file
-          nil
-        else
-          entry[:relative_path]
-        end
-    export_path =
-        MaterialSyncExportPath.build(prefix: @source.export_path_prefix,
-                                     relative_path:,
-                                     filename: entry[:name],
-                                     source_file_id: entry[:id])
-
-    { source_kind: 'google_drive_file',
-      source_uri: entry[:web_view_link] || google_drive_file_url(entry[:id]),
-      source_path: relative_path.presence || MaterialSyncExportPath.normalize_path(entry[:name]),
-      source_file_id: entry[:id],
-      filename: entry[:name],
-      content_type: entry[:mime_type],
-      file_downloader: lambda {
-        drive_client.download_to_tempfile(entry[:id], filename: entry[:name])
-      },
-      file_sha256: entry[:sha256_checksum],
-      export_path:,
-      profile: @source.profile,
-      tag: nil,
-      url: nil,
-      created_by_user: @source.created_by_user,
-      updated_by_user: @source.updated_by_user || @source.created_by_user }
-  end
-
-  def candidate_normalized_source_key candidate
-    MaterialSyncSuppression.normalize_source_key(source_kind: candidate[:source_kind],
-                                                 source_uri: candidate[:source_uri],
-                                                 source_path: candidate[:source_path],
-                                                 source_file_id: candidate[:source_file_id])
-  end
-
-  def suppression_for candidate
-    if candidate[:source_kind] == 'google_drive_file' && candidate[:source_path].present?
-      return MaterialSyncSuppressionMatcher.match_google_drive_candidate(
-          drive_file_id: candidate[:source_file_id],
-          relative_path: candidate[:source_path])
-    end
-
-    MaterialSyncSuppressionMatcher.match(source_kind: candidate[:source_kind],
-                                         source_uri: candidate[:source_uri],
-                                         source_path: candidate[:source_path],
-                                         source_file_id: candidate[:source_file_id])
-  end
-
-  def drive_client
-    @drive_client ||= GoogleDrive::ApiClient.new
-  end
-
-  def google_drive_folder_id
-    google_drive_target_id.tap do |id|
-      if id.blank?
-        raise ArgumentError, 'google_drive_path source_file_id or source_uri is required'
-      end
-    end
-  end
-
-  def google_drive_file_id
-    google_drive_target_id.tap do |id|
-      if id.blank?
-        raise ArgumentError, 'google_drive_file source_file_id or source_uri is required'
-      end
-    end
-  end
-
-  def google_drive_target_id
-    @source.source_file_id.presence || drive_client.extract_file_id(@source.source_uri)
-  end
-
-  def google_drive_file_url file_id
-    "https://drive.google.com/file/d/#{ file_id }/view"
-  end
-
-  def close_candidate_tempfile candidate
-    tempfile = candidate[:file_tempfile]
-    return unless tempfile
-
-    tempfile.close! unless tempfile.closed?
-  rescue StandardError
-    nil
-  end
-
-  def log_result result
-    Rails.logger.info(material_sync_log(imported: result.imported,
-                                        updated: result.updated,
-                                        unchanged: result.unchanged,
-                                        suppressed: result.suppressed,
-                                        failed: result.failed))
-  end
-
-  def progress_log_scan_count? scanned_count
-    scanned_count == 1 || (scanned_count % 50).zero?
-  end
-
-  def log_google_drive_progress folder_id, scanned_count, result, summary: false
-    Rails.logger.info(
-        material_sync_log(folder_id:,
-                          scanned_count:,
-                          imported: result.imported,
-                          updated: result.updated,
-                          unchanged: result.unchanged,
-                          suppressed: result.suppressed,
-                          failed: result.failed,
-                          progress: summary ? 'summary' : 'scan'))
-  end
-
-  def material_sync_log fields
-    { material_sync_source_id: @source.id,
-      material_sync_source_name: @source.name }.merge(fields).to_json
-  end
-end

backend/app/services/material_sync_suppression_matcher.rb

@@ -1,68 +0,0 @@
-class MaterialSyncSuppressionMatcher
-  def self.match source_kind:,
-                 source_uri: nil,
-                 drive_path: nil,
-                 drive_file_id: nil,
-                 source_path: nil,
-                 source_file_id: nil
-    key = MaterialSyncSuppression.normalize_source_key(source_kind:,
-                                                       source_uri:,
-                                                       drive_path:,
-                                                       drive_file_id:,
-                                                       source_path:,
-                                                       source_file_id:)
-    return nil if key.blank?
-
-    MaterialSyncSuppression.find_by(normalized_source_key: key)
-  end
-
-  def self.match_google_drive_candidate drive_file_id:, relative_path:
-    normalized_path = validate_relative_path!(relative_path)
-
-    exact = [
-      normalize_key('google_drive_file', drive_file_id),
-      normalize_key('google_drive_path', normalized_path),
-      normalize_key('legacy_drive_path', normalized_path),
-    ].compact
-
-    suppression =
-        MaterialSyncSuppression.find_by(normalized_source_key: exact)
-    return suppression if suppression
-
-    MaterialSyncSuppression
-      .where(source_kind: ['google_drive_path_prefix', 'legacy_drive_path_prefix'])
-      .where('drive_path = :path OR :path LIKE CONCAT(drive_path, "/%")', path: normalized_path)
-      .order(:id)
-      .first
-  end
-
-  def self.suppressed?(...)
-    match(...).present?
-  end
-
-  def self.validate_relative_path! relative_path
-    raw = relative_path.to_s.delete("\0").tr('\\', '/').strip
-    raise ArgumentError, 'relative_path is required' if raw.blank?
-    raise ArgumentError, 'relative_path must be relative' if raw.start_with?('/')
-    raise ArgumentError, 'relative_path must be relative' if raw.match?(/\A[A-Za-z]:\//)
-    if raw.start_with?('My Drive/', 'マイドライブ/')
-      raise ArgumentError, 'relative_path must be relative to source folder'
-    end
-    raise ArgumentError, 'relative_path must not contain //' if raw.include?('//')
-    raise ArgumentError, 'relative_path must not end with /' if raw.end_with?('/')
-
-    parts = raw.split('/')
-    if parts.any? { |part| part.in?(['.', '..']) }
-      raise ArgumentError, 'relative_path must not contain dot segments'
-    end
-
-    raw
-  end
-
-  def self.normalize_key source_kind, value
-    return nil if value.blank?
-
-    MaterialSyncSuppression.normalize_source_key(source_kind:, source_path: value,
-                                                 source_file_id: value)
-  end
-end

backend/app/services/material_sync_suppression_registrar.rb

@@ -1,51 +0,0 @@
-class MaterialSyncSuppressionRegistrar
-  def self.create! attributes, created_by_user:
-    new(attributes, created_by_user:).create!
-  end
-
-  def initialize attributes, created_by_user:
-    @attributes = attributes
-    @created_by_user = created_by_user
-  end
-
-  def create!
-    suppression = nil
-
-    MaterialSyncSuppression.transaction do
-      suppression = MaterialSyncSuppression.create!(
-          @attributes.merge(created_by_user: @created_by_user))
-      discard_existing_materials!(suppression)
-    end
-
-    suppression
-  end
-
-  private
-
-  def discard_existing_materials! suppression
-    matching_materials(suppression).find_each do |material|
-      MaterialVersionRecorder.ensure_snapshot!(material, created_by_user: @created_by_user)
-      material.discard!
-      MaterialVersionRecorder.record!(material:,
-                                      event_type: :discard,
-                                      created_by_user: @created_by_user)
-    end
-  end
-
-  def matching_materials suppression
-    materials = Material.unscoped.kept
-
-    case suppression.source_kind
-    when 'google_drive_path', 'legacy_drive_path'
-      materials.where(source_path: suppression.drive_path)
-    when 'google_drive_path_prefix', 'legacy_drive_path_prefix'
-      path = suppression.drive_path.to_s
-      materials.where(
-          'source_path = :path OR source_path LIKE :prefix',
-          path:,
-          prefix: "#{ path }/%")
-    else
-      materials.where(normalized_source_key: suppression.normalized_source_key)
-    end
-  end
-end

backend/app/services/material_thumbnail_generator.rb

@@ -1,126 +0,0 @@
-# frozen_string_literal: true
-
-require 'mini_magick'
-require 'open3'
-require 'tempfile'
-
-
-class MaterialThumbnailGenerator
-  SIZE = '180x180'
-
-  class << self
-    def generate! material
-      new(material).generate!
-    end
-  end
-
-  def initialize material
-    @material = material
-    @ffmpeg_stderr = []
-  end
-
-  def generate!
-    return log_result(:no_file) unless @material.file.attached?
-    return log_result(:unsupported_content_type) unless image? || video?
-
-    @material.file.blob.open do |file|
-      thumbnail = image? ? image_thumbnail(file.path) : video_thumbnail(file.path)
-      return log_result(:generation_failed) unless thumbnail
-
-      return attach_thumbnail(thumbnail)
-    end
-  rescue ActiveStorage::FileNotFoundError => e
-    log_result(:file_not_found, error: e)
-  rescue MiniMagick::Error => e
-    log_result(:mini_magick_error, error: e)
-  rescue ArgumentError, StandardError => e
-    log_result(:generation_failed, error: e)
-  end
-
-  private
-
-  def image? = content_type.start_with?('image/')
-
-  def video? = content_type.start_with?('video/')
-
-  def content_type
-    return nil unless @material.file.attached?
-
-    @material.file.blob.content_type.to_s
-  end
-
-  def image_thumbnail path
-    image = MiniMagick::Image.open(path)
-    image.resize(SIZE)
-    image.format('jpg')
-    image
-  end
-
-  def video_thumbnail path
-    [1, 0].each do |seconds|
-      tempfile = Tempfile.new(['material-thumbnail', '.jpg'])
-      tempfile.close
-      ok = extract_video_frame(path, tempfile.path, seconds)
-      next unless ok && File.size?(tempfile.path)
-
-      return image_thumbnail(tempfile.path)
-    ensure
-      tempfile&.unlink
-    end
-
-    nil
-  end
-
-  def extract_video_frame input_path, output_path, seconds
-    _stdout, stderr, status =
-        Open3.capture3('ffmpeg',
-                       '-y',
-                       '-ss', seconds.to_s,
-                       '-i', input_path,
-                       '-frames:v', '1',
-                       '-f', 'image2',
-                       output_path)
-    @ffmpeg_stderr << stderr if stderr.present?
-    status.success?
-  rescue Errno::ENOENT => e
-    @ffmpeg_stderr << "ffmpeg unavailable: #{ e.message }"
-    false
-  end
-
-  def attach_thumbnail image
-    blob = nil
-    File.open(image.path) do |io|
-      blob = ActiveStorage::Blob.create_and_upload!(
-          io:,
-          filename: 'material-thumbnail.jpg',
-          content_type: 'image/jpeg')
-    end
-    @material.thumbnail.attach(blob)
-    log_result(:attached)
-  rescue StandardError => e
-    blob&.purge_later
-    log_result(:attach_failed, error: e)
-  end
-
-  def log_result result, error: nil
-    log_payload = { material_id: @material.id,
-                    file_blob_id: file_blob_id,
-                    content_type:,
-                    result:,
-                    error_class: error&.class&.name,
-                    error_message: error&.message,
-                    ffmpeg_stderr: @ffmpeg_stderr.join("\n").presence }
-    if [:attached, :no_file, :unsupported_content_type].include?(result)
-      Rails.logger.info("Material thumbnail generation: #{ log_payload.to_json }")
-    else
-      Rails.logger.warn("Material thumbnail generation: #{ log_payload.to_json }")
-    end
-    result
-  end
-
-  def file_blob_id
-    return nil unless @material.file.attached?
-
-    @material.file.blob.id
-  end
-end

backend/app/services/material_version_recorder.rb

@@ -1,73 +0,0 @@
-class MaterialVersionRecorder < VersionRecorder
-  EVENT_TYPES = ['create', 'update', 'discard', 'restore'].freeze
-
-  def self.record! material:, event_type:, created_by_user:, file_snapshot: nil
-    new(material:, event_type:, created_by_user:, file_snapshot:).record!
-  end
-
-  def initialize material:, event_type:, created_by_user:, file_snapshot: nil
-    @file_snapshot = file_snapshot
-
-    super(record: material, event_type:, created_by_user:)
-  end
-
-  def self.ensure_snapshot! material, created_by_user:
-    return if material.material_versions.exists?
-
-    record!(material:, event_type: :create,
-            created_by_user: material.created_by_user || created_by_user)
-  end
-
-  private
-
-  def version_class = MaterialVersion
-  def version_association = :material_versions
-  def record_key = :material
-
-  def snapshot_attributes
-    blob = @record.file.attached? ? @record.file.blob : nil
-    file_snapshot = build_file_snapshot(blob)
-
-    { url: @record.url,
-      parent: @record.parent,
-      tag: @record.tag,
-      tag_name: @record.tag&.name,
-      tag_category: @record.tag&.category,
-      source_kind: @record.source_kind,
-      source_uri: @record.source_uri,
-      source_path: @record.source_path,
-      source_file_id: @record.source_file_id,
-      normalized_source_key: @record.normalized_source_key,
-      export_paths_json: @record.snapshot_export_paths,
-      discarded_at: @record.discarded_at,
-      file_blob_id: file_snapshot[:file_blob_id],
-      file_filename: file_snapshot[:file_filename],
-      file_content_type: file_snapshot[:file_content_type],
-      file_byte_size: file_snapshot[:file_byte_size],
-      file_checksum: file_snapshot[:file_checksum],
-      file_sha256: file_snapshot[:file_sha256] }
-  end
-
-  def build_file_snapshot blob
-    return @file_snapshot if @file_snapshot
-    return empty_file_snapshot unless blob
-
-    { file_blob_id: blob.id,
-      file_filename: blob.filename.to_s,
-      file_content_type: blob.content_type,
-      file_byte_size: blob.byte_size,
-      file_checksum: blob.checksum,
-      file_sha256: MaterialFileSha256.metadata_sha256(blob) }
-  end
-
-  def empty_file_snapshot
-    { file_blob_id: nil,
-      file_filename: nil,
-      file_content_type: nil,
-      file_byte_size: nil,
-      file_checksum: nil,
-      file_sha256: nil }
-  end
-
-  def event_types = self.class::EVENT_TYPES
-end

backend/app/services/material_zip_exporter.rb

@@ -1,148 +0,0 @@
-require 'stringio'
-require 'zlib'
-
-# Initial implementation keeps every file payload and the final ZIP in memory.
-# Keep this service boundary stable so job/cached export paths can replace it later.
-class MaterialZipExporter
-  Entry = Struct.new(:path, :data, :mtime, keyword_init: true)
-  MissingFile = Struct.new(:material_id, :export_path, :blob_id, :filename, keyword_init: true)
-
-  class EmptyExportError < StandardError; end
-  class DuplicatePathError < StandardError; end
-  class MissingFileError < StandardError
-    attr_reader :missing_files
-
-    def initialize missing_files
-      @missing_files = missing_files
-
-      super("Missing files: #{missing_files.map(&:export_path).join(', ')}")
-    end
-  end
-
-  def initialize profile: 'legacy_drive', tag_id: nil
-    @profile = profile.presence || 'legacy_drive'
-    @tag_id = tag_id.presence
-  end
-
-  def export
-    entries = build_entries
-    raise EmptyExportError if entries.empty?
-
-    ZipWriter.write(entries)
-  end
-
-  private
-
-  def build_entries
-    rows = MaterialExportItem
-           .enabled
-           .includes(material: { file_attachment: :blob })
-           .joins(:material)
-           .merge(Material.kept)
-           .where(profile: @profile)
-           .order(:export_path)
-
-    rows = rows.where(materials: { tag_id: @tag_id }) if @tag_id
-
-    missing_files = []
-
-    entries = rows.filter_map do |item|
-      material = item.material
-      next unless material.file.attached?
-
-      data = download_blob(item, missing_files)
-      next unless data
-
-      Entry.new(path: item.export_path,
-                data:,
-                mtime: material.updated_at || Time.current)
-    end
-
-    raise MissingFileError.new(missing_files) if missing_files.any?
-
-    paths = entries.map(&:path)
-    duplicated = paths.find { |path| paths.count(path) > 1 }
-    raise DuplicatePathError, duplicated if duplicated
-
-    entries
-  end
-
-  def download_blob item, missing_files
-    blob = item.material.file.blob
-
-    blob.download
-  rescue ActiveStorage::FileNotFoundError
-    missing_files << MissingFile.new(
-        material_id: item.material_id,
-        export_path: item.export_path,
-        blob_id: blob.id,
-        filename: blob.filename.to_s,
-    )
-    nil
-  end
-
-  class ZipWriter
-    VERSION_NEEDED = 20
-    GP_FLAG = 0x0800
-    COMPRESSION_STORE = 0
-
-    def self.write entries
-      new(entries).write
-    end
-
-    def initialize entries
-      @entries = entries
-      @central_directory = []
-    end
-
-    def write
-      io = StringIO.new(''.b)
-
-      @entries.each do |entry|
-        write_entry(io, entry)
-      end
-
-      central_start = io.pos
-      @central_directory.each { |header| io.write(header) }
-      central_size = io.pos - central_start
-
-      io.write([0x06054b50, 0, 0, @entries.size, @entries.size,
-                central_size, central_start, 0].pack('VvvvvVVv'))
-      io.string
-    end
-
-    private
-
-    def write_entry io, entry
-      path = entry.path.b
-      data = entry.data.b
-      crc32 = Zlib.crc32(data)
-      dos_time, dos_date = dos_timestamp(entry.mtime)
-      offset = io.pos
-
-      local_header = [0x04034b50, VERSION_NEEDED, GP_FLAG, COMPRESSION_STORE,
-                      dos_time, dos_date, crc32, data.bytesize, data.bytesize,
-                      path.bytesize, 0].pack('VvvvvvVVVvv')
-
-      io.write(local_header)
-      io.write(path)
-      io.write(data)
-
-      @central_directory << central_header(path:, crc32:, size: data.bytesize,
-                                           dos_time:, dos_date:, offset:)
-    end
-
-    def central_header path:, crc32:, size:, dos_time:, dos_date:, offset:
-      [0x02014b50, VERSION_NEEDED, VERSION_NEEDED, GP_FLAG, COMPRESSION_STORE,
-       dos_time, dos_date, crc32, size, size, path.bytesize, 0, 0, 0, 0, 0,
-       offset].pack('VvvvvvvVVVvvvvvVV') + path
-    end
-
-    def dos_timestamp time
-      local = time.to_time
-      dos_time = (local.hour << 11) | (local.min << 5) | (local.sec / 2)
-      dos_date = ((local.year - 1980) << 9) | (local.month << 5) | local.day
-      [dos_time, dos_date]
-    end
-  end
-end

backend/app/services/similarity/calc.rb

@@ -1,6 +1,6 @@
 module Similarity
   class Calc
-    def self.call model, tgt, scope: nil
+    def self.call model, tgt
       similarity_model = "#{ model.name }Similarity".constantize
 
       # 最大保存件数
@@ -8,8 +8,7 @@ module Similarity
 
       similarity_model.delete_all
 
-      scope ||= model.all
-      posts = scope.includes(tgt).select(:id).to_a
+      posts = model.includes(tgt).select(:id).to_a
 
       tag_ids = { }
       tag_cnts = { }

backend/app/services/tag_version_recorder.rb

@@ -16,7 +16,6 @@ class TagVersionRecorder < VersionRecorder
   def snapshot_attributes
     { name: @record.name,
       category: @record.category,
-      deprecated_at: @record.deprecated_at,
       aliases: @record.snapshot_aliases.join(' '),
       parent_tag_ids: @record.snapshot_parent_tag_ids.join(' ') }
   end

backend/app/services/version_recorder.rb

@@ -73,7 +73,7 @@ class VersionRecorder
   end
 
   def validate_event_type!
-    return if event_types.include?(@event_type)
+    return if EVENT_TYPES.include?(@event_type)
 
     raise ArgumentError, "Invalid event_type: #{ @event_type }"
   end
@@ -84,5 +84,4 @@ class VersionRecorder
   def snapshot_attributes = raise NotImplementedError
 
   def record_class = @record.class
-  def event_types = self.class::EVENT_TYPES
 end

backend/config/routes.rb

@@ -113,8 +113,5 @@ Rails.application.routes.draw do
     resources :skip_events, controller: :theatre_skip_events, only: [:index]
   end
 
-  get 'materials/download.zip', to: 'materials#download'
-  get 'materials/versions', to: 'material_versions#index'
-  resources :material_sync_suppressions, path: 'materials/suppressions', only: [:index, :create]
   resources :materials, only: [:index, :show, :create, :update, :destroy]
 end

backend/db/migrate/20260621000000_add_deprecated_at_to_tags.rb

@@ -1,20 +0,0 @@
-class AddDeprecatedAtToTags < ActiveRecord::Migration[8.0]
-  def up
-    add_column :tags, :deprecated_at, :datetime, after: :category
-    add_column :tag_versions, :deprecated_at, :datetime, after: :parent_tag_ids
-
-    add_index :tags, :deprecated_at
-
-    add_check_constraint :tags, "deprecated_at IS NULL OR category <> 'nico'",
-                         name: 'chk_tags_deprecated_at_not_nico'
-  end
-
-  def down
-    remove_check_constraint :tags, name: 'chk_tags_deprecated_at_not_nico'
-
-    remove_index :tags, :deprecated_at
-
-    remove_column :tag_versions, :deprecated_at, :datetime
-    remove_column :tags, :deprecated_at
-  end
-end

backend/db/migrate/20260623000000_enhance_material_management.rb

@@ -1,88 +0,0 @@
-class EnhanceMaterialManagement < ActiveRecord::Migration[8.0]
-  def up
-    change_table :materials, bulk: true do |t|
-      t.integer :version_no, null: false, default: 1
-    end
-
-    change_table :material_versions, bulk: true do |t|
-      t.string :event_type
-      t.string :tag_name
-      t.string :tag_category
-      t.json :export_paths_json
-      t.bigint :file_blob_id
-      t.string :file_filename
-      t.string :file_content_type
-      t.bigint :file_byte_size
-      t.string :file_checksum
-      t.string :file_sha256
-    end
-
-    execute <<~SQL.squish
-      UPDATE material_versions
-      SET event_type = CASE
-                       WHEN version_no = 1 THEN 'create'
-                       ELSE 'update'
-                       END
-      WHERE event_type IS NULL
-    SQL
-
-    change_column_null :material_versions, :event_type, false
-    add_index :material_versions, :file_blob_id
-
-    add_check_constraint :material_versions,
-                         "event_type IN ('create', 'update', 'discard', 'restore')",
-                         name: 'material_versions_event_type_valid'
-
-    create_table :material_export_items do |t|
-      t.references :material, null: false, foreign_key: true
-      t.string :profile, null: false, default: 'legacy_drive'
-      t.string :export_path, null: false
-      t.boolean :enabled, null: false, default: true
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-
-      t.index [:profile, :export_path], unique: true
-      t.index [:material_id, :profile], unique: true
-    end
-
-    create_table :material_import_blocks do |t|
-      t.string :match_kind, null: false
-      t.string :sha256
-      t.string :external_path_pattern
-      t.string :reason, null: false
-      t.text :note
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-    end
-
-    execute <<~SQL.squish
-      UPDATE materials
-      SET version_no = COALESCE(
-        (SELECT MAX(material_versions.version_no)
-         FROM material_versions
-         WHERE material_versions.material_id = materials.id),
-        1)
-    SQL
-  end
-
-  def down
-    drop_table :material_import_blocks
-    drop_table :material_export_items
-
-    remove_check_constraint :material_versions, name: 'material_versions_event_type_valid'
-
-    remove_index :material_versions, :file_blob_id
-    remove_column :material_versions, :event_type
-    remove_column :material_versions, :tag_name
-    remove_column :material_versions, :tag_category
-    remove_column :material_versions, :export_paths_json
-    remove_column :material_versions, :file_blob_id
-    remove_column :material_versions, :file_filename
-    remove_column :material_versions, :file_content_type
-    remove_column :material_versions, :file_byte_size
-    remove_column :material_versions, :file_checksum
-    remove_column :material_versions, :file_sha256
-
-    remove_column :materials, :version_no
-  end
-end

backend/db/migrate/20260625000000_reconcile_material_sync_suppressions.rb

@@ -1,118 +0,0 @@
-class ReconcileMaterialSyncSuppressions < ActiveRecord::Migration[8.0]
-  MATERIAL_VERSION_EVENT_CONSTRAINT = 'material_versions_event_type_valid'
-
-  def up
-    ensure_material_sync_suppressions!
-    ensure_material_source_columns!
-    ensure_material_active_source_key!
-    remove_material_file_suppression!
-    remove_material_version_file_suppression!
-    reconcile_material_version_event_constraint!
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-
-  private
-
-  def ensure_material_sync_suppressions!
-    return if table_exists?(:material_sync_suppressions)
-
-    create_table :material_sync_suppressions do |t|
-      t.string :source_kind, null: false
-      t.string :source_uri
-      t.string :drive_path
-      t.string :drive_file_id
-      t.string :normalized_source_key, null: false
-      t.string :reason, null: false
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-
-      t.index :normalized_source_key, unique: true
-      t.index :source_kind
-      t.index :drive_file_id
-    end
-  end
-
-  def ensure_material_source_columns!
-    add_column :materials, :source_kind, :string unless column_exists?(:materials, :source_kind)
-    add_column :materials, :source_uri, :string unless column_exists?(:materials, :source_uri)
-    add_column :materials, :source_path, :string unless column_exists?(:materials, :source_path)
-    unless column_exists?(:materials, :source_file_id)
-      add_column :materials, :source_file_id, :string
-    end
-    unless column_exists?(:materials, :normalized_source_key)
-      add_column :materials, :normalized_source_key, :string
-    end
-
-    if index_exists?(:materials, :normalized_source_key)
-      remove_index :materials, column: :normalized_source_key
-    end
-  end
-
-  def ensure_material_active_source_key!
-    unless column_exists?(:materials, :active_normalized_source_key)
-      change_table :materials do |t|
-        t.virtual :active_normalized_source_key,
-                  type: :string,
-                  as: 'IF(discarded_at IS NULL, normalized_source_key, NULL)',
-                  stored: false
-      end
-    end
-
-    return if index_exists?(:materials,
-                            :active_normalized_source_key,
-                            name: 'index_materials_on_active_normalized_source_key')
-
-    add_index :materials,
-              :active_normalized_source_key,
-              unique: true,
-              name: 'index_materials_on_active_normalized_source_key'
-  end
-
-  def remove_material_file_suppression!
-    if foreign_key_exists?(:materials, :users, column: :file_suppressed_by_user_id)
-      remove_foreign_key :materials, column: :file_suppressed_by_user_id
-    end
-
-    if index_exists?(:materials,
-                    :file_suppressed_by_user_id,
-                    name: 'index_materials_on_file_suppressed_by_user_id')
-      remove_index :materials, name: 'index_materials_on_file_suppressed_by_user_id'
-    end
-
-    remove_column :materials, :file_suppressed_at if column_exists?(
-        :materials,
-        :file_suppressed_at)
-    remove_column :materials, :file_suppressed_by_user_id if column_exists?(
-        :materials,
-        :file_suppressed_by_user_id)
-    remove_column :materials, :file_suppression_reason if column_exists?(
-        :materials,
-        :file_suppression_reason)
-  end
-
-  def remove_material_version_file_suppression!
-    remove_column :material_versions, :file_suppressed_at if column_exists?(
-        :material_versions,
-        :file_suppressed_at)
-    remove_column :material_versions, :file_suppression_reason if column_exists?(
-        :material_versions,
-        :file_suppression_reason)
-  end
-
-  def reconcile_material_version_event_constraint!
-    constraint = check_constraints(:material_versions).find do |candidate|
-      candidate.name == MATERIAL_VERSION_EVENT_CONSTRAINT
-    end
-    return if constraint && !constraint.expression.include?('suppress')
-
-    if constraint
-      remove_check_constraint :material_versions, name: MATERIAL_VERSION_EVENT_CONSTRAINT
-    end
-    add_check_constraint :material_versions,
-                         "event_type IN ('create', 'update', 'discard', 'restore')",
-                         name: MATERIAL_VERSION_EVENT_CONSTRAINT
-  end
-end

backend/db/migrate/20260625010000_create_material_sync_sources.rb

@@ -1,22 +0,0 @@
-class CreateMaterialSyncSources < ActiveRecord::Migration[8.0]
-  def change
-    create_table :material_sync_sources do |t|
-      t.string :name, null: false
-      t.string :source_kind, null: false
-      t.string :source_uri
-      t.string :source_path
-      t.string :source_file_id
-      t.string :profile, null: false, default: 'legacy_drive'
-      t.boolean :enabled, null: false, default: true
-      t.string :default_tag_name
-      t.string :export_path_prefix
-      t.datetime :last_synced_at
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.references :updated_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-
-      t.index :enabled
-      t.index :source_kind
-    end
-  end
-end

backend/db/migrate/20260626000000_add_source_snapshot_to_material_versions.rb

@@ -1,19 +0,0 @@
-class AddSourceSnapshotToMaterialVersions < ActiveRecord::Migration[8.0]
-  def change
-    unless column_exists?(:material_versions, :source_kind)
-      add_column :material_versions, :source_kind, :string
-    end
-    unless column_exists?(:material_versions, :source_uri)
-      add_column :material_versions, :source_uri, :string
-    end
-    unless column_exists?(:material_versions, :source_path)
-      add_column :material_versions, :source_path, :string
-    end
-    unless column_exists?(:material_versions, :source_file_id)
-      add_column :material_versions, :source_file_id, :string
-    end
-    unless column_exists?(:material_versions, :normalized_source_key)
-      add_column :material_versions, :normalized_source_key, :string
-    end
-  end
-end

backend/db/migrate/20260626010000_backfill_initial_material_versions.rb

@@ -1,171 +0,0 @@
-require 'json'
-
-class BackfillInitialMaterialVersions < ActiveRecord::Migration[8.0]
-  class MigrationMaterial < ActiveRecord::Base
-    self.table_name = 'materials'
-  end
-
-  class MigrationMaterialExportItem < ActiveRecord::Base
-    self.table_name = 'material_export_items'
-  end
-
-  class MigrationMaterialVersion < ActiveRecord::Base
-    self.table_name = 'material_versions'
-  end
-
-  class MigrationStorageAttachment < ActiveRecord::Base
-    self.table_name = 'active_storage_attachments'
-  end
-
-  class MigrationStorageBlob < ActiveRecord::Base
-    self.table_name = 'active_storage_blobs'
-  end
-
-  class MigrationTag < ActiveRecord::Base
-    self.table_name = 'tags'
-  end
-
-  class MigrationTagName < ActiveRecord::Base
-    self.table_name = 'tag_names'
-  end
-
-  def up
-    say_with_time 'Backfilling initial material versions' do
-      materials_without_versions.find_in_batches(batch_size: 500) do |materials|
-        material_ids = materials.map(&:id)
-        tags_by_id = load_tags(materials.map(&:tag_id).compact.uniq)
-        export_paths_by_material_id = load_export_paths(material_ids)
-        file_snapshots_by_material_id = load_file_snapshots(material_ids)
-
-        rows = materials.map do |material|
-          tag = tags_by_id[material.tag_id]
-          file_snapshot = file_snapshots_by_material_id[material.id] || empty_file_snapshot
-
-          { material_id: material.id,
-            version_no: 1,
-            event_type: 'create',
-            url: material.url,
-            parent_id: material.parent_id,
-            tag_id: material.tag_id,
-            tag_name: tag&.fetch(:name, nil),
-            tag_category: tag&.fetch(:category, nil),
-            source_kind: material.source_kind,
-            source_uri: material.source_uri,
-            source_path: material.source_path,
-            source_file_id: material.source_file_id,
-            normalized_source_key: material.normalized_source_key,
-            export_paths_json: export_paths_by_material_id[material.id] || { },
-            discarded_at: material.discarded_at,
-            file_blob_id: file_snapshot[:file_blob_id],
-            file_filename: file_snapshot[:file_filename],
-            file_content_type: file_snapshot[:file_content_type],
-            file_byte_size: file_snapshot[:file_byte_size],
-            file_checksum: file_snapshot[:file_checksum],
-            file_sha256: file_snapshot[:file_sha256],
-            created_by_user_id: material.created_by_user_id,
-            updated_by_user_id: material.updated_by_user_id,
-            created_at: material.created_at,
-            updated_at: material.created_at }
-        end
-
-        MigrationMaterialVersion.insert_all!(rows) if rows.present?
-      end
-    end
-
-    execute <<~SQL.squish
-      UPDATE materials
-      SET version_no = COALESCE(
-        (
-          SELECT MAX(material_versions.version_no)
-          FROM material_versions
-          WHERE material_versions.material_id = materials.id
-        ),
-        1
-      )
-    SQL
-  end
-
-  def down
-    raise ActiveRecord::IrreversibleMigration
-  end
-
-  private
-
-  def materials_without_versions
-    MigrationMaterial.where.not(id: MigrationMaterialVersion.select(:material_id))
-  end
-
-  def load_tags tag_ids
-    return { } if tag_ids.empty?
-
-    tag_name_ids_by_tag_id = MigrationTag.where(id: tag_ids).pluck(:id, :tag_name_id).to_h
-    tag_names_by_id =
-        MigrationTagName
-        .where(id: tag_name_ids_by_tag_id.values.uniq)
-        .pluck(:id, :name)
-        .to_h
-    categories_by_tag_id = MigrationTag.where(id: tag_ids).pluck(:id, :category).to_h
-
-    tag_ids.each_with_object({ }) do |tag_id, hash|
-      hash[tag_id] = { name: tag_names_by_id[tag_name_ids_by_tag_id[tag_id]],
-                       category: categories_by_tag_id[tag_id] }
-    end
-  end
-
-  def load_export_paths material_ids
-    MigrationMaterialExportItem
-      .where(material_id: material_ids)
-      .order(:material_id, :profile)
-      .pluck(:material_id, :profile, :export_path)
-      .each_with_object({ }) do |(material_id, profile, export_path), hash|
-        hash[material_id] ||= { }
-        hash[material_id][profile] = export_path
-      end
-  end
-
-  def load_file_snapshots material_ids
-    attachments_by_material_id =
-        MigrationStorageAttachment
-        .where(record_type: 'Material', name: 'file', record_id: material_ids)
-        .pluck(:record_id, :blob_id)
-        .to_h
-
-    blobs_by_id =
-        MigrationStorageBlob
-        .where(id: attachments_by_material_id.values.uniq)
-        .index_by(&:id)
-
-    attachments_by_material_id.each_with_object({ }) do |(material_id, blob_id), hash|
-      blob = blobs_by_id[blob_id]
-      next unless blob
-
-      hash[material_id] = {
-        file_blob_id: blob.id,
-        file_filename: blob.filename.to_s,
-        file_content_type: blob.content_type,
-        file_byte_size: blob.byte_size,
-        file_checksum: blob.checksum,
-        file_sha256: blob_metadata(blob)['sha256']
-      }
-    end
-  end
-
-  def empty_file_snapshot
-    { file_blob_id: nil,
-      file_filename: nil,
-      file_content_type: nil,
-      file_byte_size: nil,
-      file_checksum: nil,
-      file_sha256: nil }
-  end
-
-  def blob_metadata blob
-    metadata = blob.metadata
-    return metadata if metadata.is_a?(Hash)
-    return { } if metadata.blank?
-
-    JSON.parse(metadata)
-  rescue JSON::ParserError
-    { }
-  end
-end

backend/db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
+ActiveRecord::Schema[8.0].define(version: 2026_06_12_000000) do
   create_table "active_storage_attachments", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "name", null: false
     t.string "record_type", null: false
@@ -130,69 +130,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   end
 
-  create_table "material_export_items", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "material_id", null: false
-    t.string "profile", default: "legacy_drive", null: false
-    t.string "export_path", null: false
-    t.boolean "enabled", default: true, null: false
-    t.bigint "created_by_user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["created_by_user_id"], name: "index_material_export_items_on_created_by_user_id"
-    t.index ["material_id", "profile"], name: "index_material_export_items_on_material_id_and_profile", unique: true
-    t.index ["material_id"], name: "index_material_export_items_on_material_id"
-    t.index ["profile", "export_path"], name: "index_material_export_items_on_profile_and_export_path", unique: true
-  end
-
-  create_table "material_import_blocks", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.string "match_kind", null: false
-    t.string "sha256"
-    t.string "external_path_pattern"
-    t.string "reason", null: false
-    t.text "note"
-    t.bigint "created_by_user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["created_by_user_id"], name: "index_material_import_blocks_on_created_by_user_id"
-  end
-
-  create_table "material_sync_sources", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.string "name", null: false
-    t.string "source_kind", null: false
-    t.string "source_uri"
-    t.string "source_path"
-    t.string "source_file_id"
-    t.string "profile", default: "legacy_drive", null: false
-    t.boolean "enabled", default: true, null: false
-    t.string "default_tag_name"
-    t.string "export_path_prefix"
-    t.datetime "last_synced_at"
-    t.bigint "created_by_user_id"
-    t.bigint "updated_by_user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["created_by_user_id"], name: "index_material_sync_sources_on_created_by_user_id"
-    t.index ["enabled"], name: "index_material_sync_sources_on_enabled"
-    t.index ["source_kind"], name: "index_material_sync_sources_on_source_kind"
-    t.index ["updated_by_user_id"], name: "index_material_sync_sources_on_updated_by_user_id"
-  end
-
-  create_table "material_sync_suppressions", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.string "source_kind", null: false
-    t.string "source_uri"
-    t.string "drive_path"
-    t.string "drive_file_id"
-    t.string "normalized_source_key", null: false
-    t.string "reason", null: false
-    t.bigint "created_by_user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["created_by_user_id"], name: "index_material_sync_suppressions_on_created_by_user_id"
-    t.index ["drive_file_id"], name: "index_material_sync_suppressions_on_drive_file_id"
-    t.index ["normalized_source_key"], name: "index_material_sync_suppressions_on_normalized_source_key", unique: true
-    t.index ["source_kind"], name: "index_material_sync_suppressions_on_source_kind"
-  end
-
   create_table "material_versions", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "material_id", null: false
     t.integer "version_no", null: false
@@ -204,31 +141,14 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.datetime "discarded_at"
-    t.string "event_type", null: false
-    t.string "tag_name"
-    t.string "tag_category"
-    t.json "export_paths_json"
-    t.bigint "file_blob_id"
-    t.string "file_filename"
-    t.string "file_content_type"
-    t.bigint "file_byte_size"
-    t.string "file_checksum"
-    t.string "file_sha256"
-    t.string "source_kind"
-    t.string "source_uri"
-    t.string "source_path"
-    t.string "source_file_id"
-    t.string "normalized_source_key"
     t.index ["created_by_user_id"], name: "index_material_versions_on_created_by_user_id"
     t.index ["discarded_at"], name: "index_material_versions_on_discarded_at"
-    t.index ["file_blob_id"], name: "index_material_versions_on_file_blob_id"
     t.index ["material_id", "version_no"], name: "index_material_versions_on_material_id_and_version_no", unique: true
     t.index ["material_id"], name: "index_material_versions_on_material_id"
     t.index ["parent_id"], name: "index_material_versions_on_parent_id"
     t.index ["tag_id"], name: "index_material_versions_on_tag_id"
     t.index ["updated_by_user_id"], name: "index_material_versions_on_updated_by_user_id"
     t.index ["url"], name: "index_material_versions_on_url"
-    t.check_constraint "`event_type` in (_utf8mb4'create',_utf8mb4'update',_utf8mb4'discard',_utf8mb4'restore')", name: "material_versions_event_type_valid"
   end
 
   create_table "materials", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -241,14 +161,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
     t.datetime "updated_at", null: false
     t.datetime "discarded_at"
     t.virtual "active_url", type: :string, as: "if((`discarded_at` is null),`url`,NULL)"
-    t.integer "version_no", default: 1, null: false
-    t.string "source_kind"
-    t.string "source_uri"
-    t.string "source_path"
-    t.string "source_file_id"
-    t.string "normalized_source_key"
-    t.virtual "active_normalized_source_key", type: :string, as: "if((`discarded_at` is null),`normalized_source_key`,NULL)"
-    t.index ["active_normalized_source_key"], name: "index_materials_on_active_normalized_source_key", unique: true
     t.index ["active_url"], name: "index_materials_on_active_url", unique: true
     t.index ["created_by_user_id"], name: "index_materials_on_created_by_user_id"
     t.index ["discarded_at"], name: "index_materials_on_discarded_at"
@@ -407,7 +319,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
     t.string "event_type", null: false
     t.string "name", null: false
     t.string "category", null: false
-    t.datetime "deprecated_at"
     t.text "aliases", null: false
     t.text "parent_tag_ids", null: false
     t.datetime "created_at", null: false
@@ -425,13 +336,10 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.integer "post_count", default: 0, null: false
-    t.datetime "deprecated_at"
     t.datetime "discarded_at"
     t.integer "version_no", null: false
-    t.index ["deprecated_at"], name: "index_tags_on_deprecated_at"
     t.index ["discarded_at"], name: "index_tags_on_discarded_at"
     t.index ["tag_name_id"], name: "index_tags_on_tag_name_id", unique: true
-    t.check_constraint "(`deprecated_at` is null) or (`category` <> _utf8mb4'nico')", name: "chk_tags_deprecated_at_not_nico"
     t.check_constraint "`version_no` > 0", name: "chk_tags_version_no_positive"
   end
 
@@ -655,12 +563,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_06_26_010000) do
   add_foreign_key "gekanator_question_suggestions", "users"
   add_foreign_key "gekanator_questions", "gekanator_question_suggestions"
   add_foreign_key "gekanator_questions", "users", column: "created_by_id"
-  add_foreign_key "material_export_items", "materials"
-  add_foreign_key "material_export_items", "users", column: "created_by_user_id"
-  add_foreign_key "material_import_blocks", "users", column: "created_by_user_id"
-  add_foreign_key "material_sync_sources", "users", column: "created_by_user_id"
-  add_foreign_key "material_sync_sources", "users", column: "updated_by_user_id"
-  add_foreign_key "material_sync_suppressions", "users", column: "created_by_user_id"
   add_foreign_key "material_versions", "materials"
   add_foreign_key "material_versions", "materials", column: "parent_id"
   add_foreign_key "material_versions", "tags"

backend/db/seeds.rb

@@ -7,21 +7,3 @@
 #   ["Action", "Comedy", "Drama", "Horror"].each do |genre_name|
 #     MovieGenre.find_or_create_by!(name: genre_name)
 #   end
-
-material_sync_source_uri = ENV['MATERIAL_SYNC_SOURCE_URI']
-material_sync_source_file_id = ENV['MATERIAL_SYNC_SOURCE_FILE_ID']
-
-if material_sync_source_uri.present? || material_sync_source_file_id.present?
-  source = MaterialSyncSource.find_or_initialize_by(
-      name: ENV.fetch('MATERIAL_SYNC_SOURCE_NAME', 'Legacy URI material sync'))
-  source.assign_attributes(
-      source_kind: ENV.fetch('MATERIAL_SYNC_SOURCE_KIND', 'uri'),
-      source_uri: material_sync_source_uri,
-      source_path: ENV['MATERIAL_SYNC_SOURCE_PATH'],
-      source_file_id: material_sync_source_file_id,
-      profile: ENV.fetch('MATERIAL_SYNC_SOURCE_PROFILE', 'legacy_drive'),
-      enabled: ENV.fetch('MATERIAL_SYNC_SOURCE_ENABLED', 'true') != 'false',
-      default_tag_name: ENV['MATERIAL_SYNC_SOURCE_TAG_NAME'],
-      export_path_prefix: ENV['MATERIAL_SYNC_EXPORT_PATH_PREFIX'])
-  source.save!
-end

backend/lib/tasks/calc_post_similarities.rake

@@ -1,6 +1,6 @@
 namespace :post_similarity do
   desc '関聯投稿テーブル作成'
   task calc: :environment do
-    Similarity::Calc.call(Post, :active_tags)
+    Similarity::Calc.call(Post, :tags)
   end
 end

backend/lib/tasks/calc_tag_similarities.rake

@@ -1,6 +1,6 @@
 namespace :tag_similarity do
   desc '関聯タグ・テーブル作成'
   task calc: :environment do
-    Similarity::Calc.call(Tag, :posts, scope: Tag.where(deprecated_at: nil))
+    Similarity::Calc.call(Tag, :posts)
   end
 end

backend/lib/tasks/sync_materials.rake

@@ -1,51 +0,0 @@
-namespace :materials do
-  desc '素材同期'
-  task sync: :environment do
-    result = MaterialSyncRunner.sync_enabled!
-    message = [
-      "materials:sync imported=#{ result.imported }",
-      "updated=#{ result.updated }",
-      "unchanged=#{ result.unchanged }",
-      "suppressed=#{ result.suppressed }",
-      "failed=#{ result.failed }"
-    ].join(' ')
-
-    Rails.logger.info(message)
-    puts message
-
-    result.errors.each do |error|
-      Rails.logger.warn(error.to_json)
-      warn error.to_json
-    end
-  end
-
-  namespace :thumbnails do
-    desc '素材サムネールを補完'
-    task backfill: :environment do
-      counts = Hash.new(0)
-
-      Material
-        .with_attached_file
-        .with_attached_thumbnail
-        .find_each do |material|
-          next unless material.file.attached?
-          next if material.thumbnail.attached?
-
-          result = MaterialThumbnailGenerator.generate!(material)
-          counts[result] += 1
-        end
-
-      message =
-          "materials:thumbnails:backfill " \
-          "attached=#{ counts[:attached] } " \
-          "no_file=#{ counts[:no_file] } " \
-          "unsupported_content_type=#{ counts[:unsupported_content_type] } " \
-          "generation_failed=#{ counts[:generation_failed] } " \
-          "attach_failed=#{ counts[:attach_failed] } " \
-          "file_not_found=#{ counts[:file_not_found] } " \
-          "mini_magick_error=#{ counts[:mini_magick_error] }"
-      Rails.logger.info(message)
-      puts message
-    end
-  end
-end

backend/spec/models/material_export_item_spec.rb

@@ -1,57 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe MaterialExportItem, type: :model do
-  let(:user) { create(:user, :member) }
-  let(:tag) { Tag.create!(tag_name: TagName.create!(name: 'export_item'), category: :material) }
-  let(:material) do
-    Material.create!(tag:, url: 'https://example.com/material',
-                     created_by_user: user, updated_by_user: user)
-  end
-
-  it 'rejects blank export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive', export_path: '')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-
-  it 'rejects absolute export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive',
-                               export_path: '/素材/a.png')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-
-  it 'rejects parent traversal export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive',
-                               export_path: '素材/../a.png')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-
-  it 'rejects double slash export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive',
-                               export_path: '素材//a.png')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-
-  it 'rejects dot segment export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive',
-                               export_path: './素材/a.png')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-
-  it 'rejects trailing slash export_path' do
-    item = described_class.new(material:, profile: 'legacy_drive',
-                               export_path: '素材/a/')
-
-    expect(item).not_to be_valid
-    expect(item.errors[:export_path]).to be_present
-  end
-end

backend/spec/models/material_spec.rb

@@ -1,19 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe Material, type: :model do
-  let(:user) { create(:user, :member) }
-
-  it 'allows only material source kinds, not suppression prefix kinds' do
-    material = described_class.new(url: 'https://example.com/material',
-                                   source_kind: 'google_drive_path_prefix',
-                                   source_path: '素材/危険',
-                                   created_by_user: user,
-                                   updated_by_user: user)
-
-    expect(material).not_to be_valid
-    expect(material.errors[:source_kind]).to be_present
-
-    material.source_kind = 'google_drive_path'
-    expect(material).to be_valid
-  end
-end

backend/spec/models/tag_implication_spec.rb

@@ -1,36 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe TagImplication, type: :model do
-  it 'rejects a parent tag that would create a cycle' do
-    child = create(:tag, name: 'tag_implication_cycle_child')
-    parent = create(:tag, name: 'tag_implication_cycle_parent')
-
-    described_class.create!(tag: child, parent_tag: parent)
-
-    implication = described_class.new(tag: parent, parent_tag: child)
-
-    expect(implication).not_to be_valid
-    expect(implication.errors[:parent_tag_id]).to include(
-      '親タグに子孫タグを指定すると循環します．'
-    )
-    expect(implication.errors[:base]).to be_present
-  end
-
-  it 'terminates even when existing data already contains a cycle' do
-    child = create(:tag, name: 'tag_implication_existing_cycle_child')
-    parent = create(:tag, name: 'tag_implication_existing_cycle_parent')
-    ancestor = create(:tag, name: 'tag_implication_existing_cycle_ancestor')
-
-    described_class.create!(tag: parent, parent_tag: ancestor)
-    described_class.insert_all!(
-      [
-        { tag_id: ancestor.id, parent_tag_id: parent.id,
-          created_at: Time.current, updated_at: Time.current }
-      ]
-    )
-
-    implication = described_class.new(tag: child, parent_tag: parent)
-
-    expect(implication).to be_valid
-  end
-end

backend/spec/models/tag_spec.rb

@@ -1,89 +1,6 @@
 require 'rails_helper'
 
 RSpec.describe Tag, type: :model do
-  describe '.normalise_tags!' do
-    it 'rejects deprecated tags when deny_deprecated is enabled' do
-      tag_name = TagName.create!(name: 'normalise deprecated tag')
-      deprecated_tag = Tag.create!(
-        tag_name:,
-        category: :general,
-        deprecated_at: 1.day.from_now
-      )
-
-      expect {
-        described_class.normalise_tags!(
-          [deprecated_tag.name],
-          deny_deprecated: true
-        )
-      }.to raise_error(Tag::DeprecatedTagNormalisationError) { |error|
-        expect(error.tag_names).to eq([deprecated_tag.name])
-      }
-    end
-  end
-
-  describe '.expand_parent_tags' do
-    it 'expands through multiple deprecated parents to an active ancestor' do
-      child = create(:tag, name: 'expand_child')
-      deprecated_parent = create(
-        :tag,
-        name: 'expand_deprecated_parent',
-        deprecated_at: Time.current
-      )
-      deprecated_grandparent = create(
-        :tag,
-        name: 'expand_deprecated_grandparent',
-        deprecated_at: Time.current
-      )
-      active_ancestor = create(:tag, name: 'expand_active_ancestor')
-      TagImplication.create!(tag: child, parent_tag: deprecated_parent)
-      TagImplication.create!(tag: deprecated_parent, parent_tag: deprecated_grandparent)
-      TagImplication.create!(tag: deprecated_grandparent, parent_tag: active_ancestor)
-
-      expanded = described_class.expand_parent_tags([child])
-
-      expect(expanded).to include(
-        child,
-        deprecated_parent,
-        deprecated_grandparent,
-        active_ancestor
-      )
-      expect(expanded.reject(&:deprecated?)).to contain_exactly(child, active_ancestor)
-    end
-
-    it 'terminates when implications contain a cycle' do
-      first = create(:tag, name: 'expand_cycle_first')
-      second = create(:tag, name: 'expand_cycle_second')
-      TagImplication.create!(tag: first, parent_tag: second)
-      now = Time.current
-      TagImplication.insert_all!(
-        [
-          {
-            tag_id: second.id,
-            parent_tag_id: first.id,
-            created_at: now,
-            updated_at: now
-          }
-        ]
-      )
-
-      expect(described_class.expand_parent_tags([first])).to contain_exactly(first, second)
-    end
-  end
-
-  describe 'deprecated validation' do
-    it 'rejects deprecated nico tags' do
-      tag = build(
-        :tag,
-        name: 'nico:deprecated_validation',
-        category: :nico,
-        deprecated_at: Time.current
-      )
-
-      expect(tag).not_to be_valid
-      expect(tag.errors[:deprecated_at]).to include('ニコタグは廃止できません．')
-    end
-  end
-
   describe '.merge_tags!' do
     let!(:target_tag) { create(:tag, category: :general) }
     let!(:source_tag) { create(:tag, category: :general) }

backend/spec/requests/gekanator_learning_spec.rb

@@ -897,37 +897,6 @@ RSpec.describe 'Gekanator learning API', type: :request do
   end
 
   describe 'GET /gekanator/questions' do
-    it 'omits questions for deprecated tags' do
-      active_tag = Tag.create!(name: 'active_question_tag', category: :general)
-      deprecated_tag = Tag.create!(
-        name: 'deprecated_question_tag',
-        category: :general,
-        deprecated_at: Time.current
-      )
-
-      [active_tag, deprecated_tag].each do |question_tag|
-        GekanatorQuestion.create!(
-          text: "#{ question_tag.name }?",
-          kind: 'tag',
-          source: 'admin_curated',
-          status: 'accepted',
-          priority_weight: 1.0,
-          condition: {
-            type: 'tag',
-            key: "#{ question_tag.category }:#{ question_tag.name }"
-          },
-          created_by: admin
-        )
-      end
-
-      get '/gekanator/questions'
-
-      expect(response).to have_http_status(:ok)
-      question_ids = json.fetch('questions').map { |question| question.fetch('id') }
-      expect(question_ids).to include('tag:general:active_question_tag')
-      expect(question_ids).not_to include('tag:general:deprecated_question_tag')
-    end
-
     it 'returns accepted questions only and includes example_answers for post_similarity questions' do
       sign_in_as admin
 

backend/spec/requests/gekanator_posts_spec.rb

@@ -1,33 +0,0 @@
-require 'rails_helper'
-
-
-RSpec.describe 'Gekanator posts API', type: :request do
-  describe 'GET /gekanator/posts' do
-    it 'omits deprecated tags and returns the stored similarity cosine' do
-      active_tag = Tag.create!(name: 'active tag', category: :general)
-      deprecated_tag = Tag.create!(
-        name: 'deprecated tag',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      post_record = Post.create!(title: 'source', url: 'https://example.com/source')
-      target_post = Post.create!(title: 'target', url: 'https://example.com/target')
-
-      PostTag.create!(post: post_record, tag: active_tag)
-      PostTag.create!(post: post_record, tag: deprecated_tag)
-      PostTag.create!(post: target_post, tag: deprecated_tag)
-      PostSimilarity.create!(post: post_record, target_post:, cos: 0.375)
-
-      get '/gekanator/posts'
-
-      expect(response).to have_http_status(:ok)
-
-      post_json = json.fetch('posts').find { |post| post.fetch('id') == post_record.id }
-      expect(post_json.fetch('tags').map { |tag| tag.fetch('name') }).to eq(['active tag'])
-      expect(post_json.fetch('post_similarity_edges')).to contain_exactly(
-        'target_post_id' => target_post.id,
-        'cos' => 0.375
-      )
-    end
-  end
-end

backend/spec/requests/materials_spec.rb

@@ -1,10 +1,7 @@
 require 'rails_helper'
 
 RSpec.describe 'Materials API', type: :request do
-  include ActiveJob::TestHelper
-
   let!(:member_user) { create(:user, :member) }
-  let!(:admin_user)  { create(:user, :admin) }
   let!(:guest_user)  { create(:user) }
 
   def dummy_upload(filename: 'dummy.png', type: 'image/png', body: 'dummy')
@@ -16,29 +13,22 @@ RSpec.describe 'Materials API', type: :request do
   end
 
   def build_material(tag:, user:, parent: nil, file: dummy_upload, url: nil)
-    Material.new(tag:, parent:, url:,
-                 created_by_user: user,
-                 updated_by_user: user).tap do |material|
+    Material.new(tag:, parent:, url:, created_by_user: user, updated_by_user: user).tap do |material|
       material.file.attach(file) if file
       material.save!
     end
   end
 
   describe 'GET /materials' do
-    let!(:tag_a) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_index_a'), category: :material)
-    end
-    let!(:tag_b) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_index_b'), category: :material)
-    end
+    let!(:tag_a) { Tag.create!(tag_name: TagName.create!(name: 'material_index_a'), category: :material) }
+    let!(:tag_b) { Tag.create!(tag_name: TagName.create!(name: 'material_index_b'), category: :material) }
 
     let!(:material_a) do
       build_material(tag: tag_a, user: member_user, file: dummy_upload(filename: 'a.png'))
     end
 
     let!(:material_b) do
-      build_material(tag: tag_b, user: member_user, parent: material_a,
-                     file: dummy_upload(filename: 'b.png'))
+      build_material(tag: tag_b, user: member_user, parent: material_a, file: dummy_upload(filename: 'b.png'))
     end
 
     before do
@@ -64,36 +54,27 @@ RSpec.describe 'Materials API', type: :request do
         'name' => 'material_index_b',
         'category' => 'material'
       )
+      expect(row['created_by_user']).to include(
+        'id' => member_user.id,
+        'name' => member_user.name
+      )
       expect(row['content_type']).to eq('image/png')
-      expect(row['media_kind']).to eq('image')
     end
 
-    it 'filters materials by q' do
-      get '/materials', params: { q: 'material_index_a' }
+    it 'filters materials by tag_id' do
+      get '/materials', params: { tag_id: material_a.tag_id }
 
       expect(response).to have_http_status(:ok)
       expect(json['count']).to eq(1)
       expect(response_materials.map { |m| m['id'] }).to eq([material_a.id])
     end
 
-    it 'filters materials by tag_state' do
-      untagged =
-          build_material(tag: nil, user: member_user,
-                         file: dummy_upload(filename: 'untagged.png'))
-
-      get '/materials', params: { tag_state: 'untagged' }
+    it 'filters materials by parent_id' do
+      get '/materials', params: { parent_id: material_a.id }
 
       expect(response).to have_http_status(:ok)
       expect(json['count']).to eq(1)
-      expect(response_materials.map { |m| m['id'] }).to eq([untagged.id])
-    end
-
-    it 'filters materials by media_kind' do
-      get '/materials', params: { media_kind: 'image' }
-
-      expect(response).to have_http_status(:ok)
-      expect(json['count']).to eq(2)
-      expect(response_materials.map { |m| m['media_kind'] }).to all(eq('image'))
+      expect(response_materials.map { |m| m['id'] }).to eq([material_b.id])
     end
 
     it 'paginates and keeps total count' do
@@ -113,74 +94,10 @@ RSpec.describe 'Materials API', type: :request do
       expect(response_materials.size).to eq(1)
       expect(response_materials.first['id']).to eq(material_b.id)
     end
-
-    it 'filters by descendant tags and returns stable parent tag groups' do
-      root =
-          Tag.create!(tag_name: TagName.create!(name: 'material_scope_root'),
-                      category: :material)
-      child_b =
-          Tag.create!(tag_name: TagName.create!(name: 'material_scope_b'),
-                      category: :material)
-      child_a =
-          Tag.create!(tag_name: TagName.create!(name: 'material_scope_a'),
-                      category: :material)
-      deprecated =
-          Tag.create!(tag_name: TagName.create!(name: 'material_scope_old'),
-                      category: :material,
-                      deprecated_at: Time.current)
-      grandchild =
-          Tag.create!(tag_name: TagName.create!(name: 'material_scope_grandchild'),
-                      category: :material)
-      root_material =
-          build_material(tag: root, user: member_user,
-                         file: dummy_upload(filename: 'root.png'))
-      child_a_material =
-          build_material(tag: child_a, user: member_user,
-                         file: dummy_upload(filename: 'child_a.png'))
-      grandchild_material =
-          build_material(tag: grandchild, user: member_user,
-                         file: dummy_upload(filename: 'grandchild.png'))
-
-      TagImplication.create!(parent_tag: root, tag: child_b)
-      TagImplication.create!(parent_tag: root, tag: child_a)
-      TagImplication.create!(parent_tag: child_b, tag: deprecated)
-      TagImplication.create!(parent_tag: deprecated, tag: grandchild)
-
-      get '/materials',
-          params: { tag_id: root.id, include_descendants: '1',
-                    group_by: 'parent_tag', sort: 'id', direction: 'asc' }
-
-      expect(response).to have_http_status(:ok)
-      expect(response_materials.map { |m| m['id'] })
-        .to include(root_material.id, child_a_material.id, grandchild_material.id)
-      expect(json['tag_scope']).to eq(
-        'tag' => {
-          'id' => root.id,
-          'name' => 'material_scope_root',
-          'category' => 'material'
-        },
-        'include_descendants' => true
-      )
-      expect(json['groups'].map { |group| group.dig('tag', 'name') })
-        .to eq(['material_scope_a', 'material_scope_b', 'material_scope_root'])
-      expect(json['groups'].find { |group| group.dig('tag', 'id') == child_b.id }
-        .fetch('material_ids')).to eq([grandchild_material.id])
-    end
-
-    it 'returns nil tag_scope when tag_id is unknown' do
-      get '/materials', params: { tag_id: 999_999, group_by: 'parent_tag' }
-
-      expect(response).to have_http_status(:ok)
-      expect(json['tag_scope']).to be_nil
-      expect(json['groups']).to eq([])
-      expect(response_materials).to eq([])
-    end
   end
 
   describe 'GET /materials/:id' do
-    let!(:tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_show'), category: :material)
-    end
+    let!(:tag) { Tag.create!(tag_name: TagName.create!(name: 'material_show'), category: :material) }
     let!(:material) do
       build_material(tag:, user: member_user, file: dummy_upload(filename: 'show.png'))
     end
@@ -221,22 +138,9 @@ RSpec.describe 'Materials API', type: :request do
       end
     end
 
-    context 'when logged in but not member' do
+    context 'when logged in' do
       before { sign_in_as(guest_user) }
 
-      it 'returns 403' do
-        post '/materials', params: {
-          tag: 'material_create_guest_forbidden',
-          file: dummy_upload
-        }
-
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when member' do
-      before { sign_in_as(member_user) }
-
       it 'returns 422 when tag is blank' do
         post '/materials', params: { tag: '   ', file: dummy_upload }
 
@@ -258,49 +162,24 @@ RSpec.describe 'Materials API', type: :request do
         expect do
           post '/materials', params: {
             tag: 'material_create_new',
-            file: dummy_upload(filename: 'created.png'),
-            export_paths: { legacy_drive: '伊地知ニジカ/created.png' }
+            file: dummy_upload(filename: 'created.png')
           }
         end.to change(Material, :count).by(1)
           .and change(Tag, :count).by(1)
           .and change(TagName, :count).by(1)
-          .and change(MaterialVersion, :count).by(1)
 
         expect(response).to have_http_status(:created)
 
         material = Material.order(:id).last
         expect(material.tag.name).to eq('material_create_new')
         expect(material.tag.category).to eq('material')
-        expect(material.created_by_user).to eq(member_user)
-        expect(material.updated_by_user).to eq(member_user)
+        expect(material.created_by_user).to eq(guest_user)
+        expect(material.updated_by_user).to eq(guest_user)
         expect(material.file.attached?).to be(true)
-        expect(material.version_no).to eq(1)
-        expect(material.material_versions.first.event_type).to eq('create')
-        expect(material.material_export_items.first.export_path).to eq('伊地知ニジカ/created.png')
-        expect(material.material_versions.first.export_paths_json).to eq(
-          'legacy_drive' => '伊地知ニジカ/created.png'
-        )
 
         expect(json['id']).to eq(material.id)
         expect(json.dig('tag', 'name')).to eq('material_create_new')
         expect(json['content_type']).to eq('image/png')
-        expect(json.dig('export_paths', 'legacy_drive')).to eq('伊地知ニジカ/created.png')
-      end
-
-      it 'snapshots attached file metadata and sha256' do
-        post '/materials', params: {
-          tag: 'material_create_file_version',
-          file: dummy_upload(filename: 'created.png', body: 'sha-body')
-        }
-
-        expect(response).to have_http_status(:created)
-
-        version = Material.order(:id).last.material_versions.first
-        expect(version.file_blob_id).to be_present
-        expect(version.file_filename).to eq('created.png')
-        expect(version.file_content_type).to eq('image/png')
-        expect(version.file_byte_size).to eq('sha-body'.bytesize)
-        expect(version.file_sha256).to eq(Digest::SHA256.hexdigest('sha-body'))
       end
 
       it 'returns 422 when the existing tag is not material/character' do
@@ -340,33 +219,11 @@ RSpec.describe 'Materials API', type: :request do
         expect(response).to have_http_status(:created)
         expect(json['url']).to eq('https://example.com/material-source')
       end
-
-      it 'rejects sha256-blocked file upload' do
-        sha256 = Digest::SHA256.hexdigest('blocked-body')
-        MaterialImportBlock.create!(match_kind: 'sha256',
-                                    sha256:,
-                                    reason: 'copyright_high_risk',
-                                    created_by_user: admin_user)
-
-        expect do
-          post '/materials', params: {
-            tag: 'material_blocked_create',
-            file: dummy_upload(filename: 'blocked.png', body: 'blocked-body')
-          }
-        end.not_to change(Material, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to include(
-          'file' => ['抑止された素材です: copyright_high_risk']
-        )
-      end
     end
   end
 
   describe 'PUT /materials/:id' do
-    let!(:tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_update_old'), category: :material)
-    end
+    let!(:tag) { Tag.create!(tag_name: TagName.create!(name: 'material_update_old'), category: :material) }
     let!(:material) do
       build_material(tag:, user: member_user, file: dummy_upload(filename: 'old.png'))
     end
@@ -420,26 +277,25 @@ RSpec.describe 'Materials API', type: :request do
             'tag' => ['タグは必須です．'])
       end
 
-      it 'keeps the existing file when file and url are omitted' do
+      it 'returns 422 when both file and url are blank' do
         put "/materials/#{ material.id }", params: {
           tag: 'material_update_no_payload'
         }
 
-        expect(response).to have_http_status(:ok)
-        expect(material.reload.file.attached?).to be(true)
+        expect(response).to have_http_status(:unprocessable_entity)
+        expect(json.fetch('errors')).to include(
+            'file' => ['ファイルまたは URL は必須です．'],
+            'url' => ['ファイルまたは URL は必須です．'])
       end
 
       it 'updates tag, url, file, and updated_by_user' do
         old_blob_id = material.file.blob.id
 
-        expect do
-          put "/materials/#{ material.id }", params: {
-            tag: 'material_update_new',
-            url: 'https://example.com/updated-source',
-            file: dummy_upload(filename: 'updated.jpg', type: 'image/jpeg'),
-            export_paths: { legacy_drive: '伊地知ニジカ/updated.jpg' }
-          }
-        end.to change(MaterialVersion, :count).by(2)
+        put "/materials/#{ material.id }", params: {
+          tag: 'material_update_new',
+          url: 'https://example.com/updated-source',
+          file: dummy_upload(filename: 'updated.jpg', type: 'image/jpeg')
+        }
 
         expect(response).to have_http_status(:ok)
 
@@ -450,15 +306,8 @@ RSpec.describe 'Materials API', type: :request do
         expect(material.updated_by_user).to eq(member_user)
         expect(material.file.attached?).to be(true)
         expect(material.file.blob.id).not_to eq(old_blob_id)
-        expect(ActiveStorage::Blob.where(id: old_blob_id).exists?).to be(true)
         expect(material.file.blob.filename.to_s).to eq('updated.jpg')
         expect(material.file.blob.content_type).to eq('image/jpeg')
-        expect(material.version_no).to eq(2)
-        expect(material.material_versions.order(:version_no).last.event_type).to eq('update')
-        expect(material.material_export_items.first.export_path).to eq('伊地知ニジカ/updated.jpg')
-        expect(material.material_versions.order(:version_no).last.export_paths_json).to eq(
-          'legacy_drive' => '伊地知ニジカ/updated.jpg'
-        )
 
         expect(json['id']).to eq(material.id)
         expect(json['file']).to be_present
@@ -466,7 +315,7 @@ RSpec.describe 'Materials API', type: :request do
         expect(json.dig('tag', 'name')).to eq('material_update_new')
       end
 
-      it 'detaches the existing file without purging blob when url replaces file' do
+      it 'purges the existing file when file is omitted and url is provided' do
         old_blob_id = material.file.blob.id
 
         put "/materials/#{ material.id }", params: {
@@ -482,7 +331,9 @@ RSpec.describe 'Materials API', type: :request do
         expect(material.updated_by_user).to eq(member_user)
         expect(material.file.attached?).to be(false)
 
-        expect(ActiveStorage::Blob.where(id: old_blob_id).exists?).to be(true)
+        expect(
+          ActiveStorage::Blob.where(id: old_blob_id).exists?
+        ).to be(false)
 
         expect(json['id']).to eq(material.id)
         expect(json['file']).to be_nil
@@ -490,205 +341,11 @@ RSpec.describe 'Materials API', type: :request do
         expect(json.dig('tag', 'name')).to eq('material_update_remove_file')
         expect(json['url']).to eq('https://example.com/updated-source')
       end
-
-      it 'does not increase version for the same snapshot update' do
-        MaterialVersionRecorder.record!(material:, event_type: :create,
-                                        created_by_user: member_user)
-
-        expect do
-          put "/materials/#{ material.id }", params: {
-            tag: 'material_update_old'
-          }
-        end.not_to change(MaterialVersion, :count)
-
-        expect(response).to have_http_status(:ok)
-        expect(material.reload.version_no).to eq(1)
-      end
-
-      it 'records update version when only export_path changes' do
-        MaterialVersionRecorder.record!(material:, event_type: :create,
-                                        created_by_user: member_user)
-
-        expect do
-          put "/materials/#{ material.id }", params: {
-            tag: 'material_update_old',
-            export_paths: { legacy_drive: '素材/only-path.png' }
-          }
-        end.to change(MaterialVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-        expect(material.reload.material_export_items.first.export_path).to eq('素材/only-path.png')
-        expect(material.material_versions.order(:version_no).last.export_paths_json).to eq(
-          'legacy_drive' => '素材/only-path.png'
-        )
-      end
-
-      it 'removes export_path item when blank is submitted' do
-        MaterialExportItem.create!(material:, profile: 'legacy_drive',
-                                   export_path: '素材/remove.png',
-                                   created_by_user: member_user)
-        MaterialVersionRecorder.record!(material:, event_type: :create,
-                                        created_by_user: member_user)
-
-        expect do
-          put "/materials/#{ material.id }", params: {
-            tag: 'material_update_old',
-            export_paths: { legacy_drive: '' }
-          }
-        end.to change(MaterialExportItem, :count).by(-1)
-          .and change(MaterialVersion, :count).by(1)
-
-        expect(response).to have_http_status(:ok)
-        expect(material.reload.material_export_items).to be_empty
-        expect(material.material_versions.order(:version_no).last.export_paths_json).to eq({})
-      end
-
-      it 'rejects sha256-blocked replacement file' do
-        sha256 = Digest::SHA256.hexdigest('blocked-update')
-        MaterialImportBlock.create!(match_kind: 'sha256',
-                                    sha256:,
-                                    reason: 'source_owner_request',
-                                    created_by_user: admin_user)
-
-        put "/materials/#{ material.id }", params: {
-          tag: 'material_update_old',
-          file: dummy_upload(filename: 'blocked.png', body: 'blocked-update')
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(material.reload.file.blob.filename.to_s).to eq('old.png')
-      end
-    end
-  end
-
-  describe 'GET /materials/download.zip' do
-    let!(:tag_a) { Tag.create!(tag_name: TagName.create!(name: 'zip_a'), category: :material) }
-    let!(:tag_b) { Tag.create!(tag_name: TagName.create!(name: 'zip_b'), category: :material) }
-    let!(:material_a) do
-      build_material(tag: tag_a, user: member_user,
-                     file: dummy_upload(filename: 'a.png', body: 'zip-a'))
-    end
-    let!(:material_b) do
-      build_material(tag: tag_b, user: member_user,
-                     file: dummy_upload(filename: 'b.png', body: 'zip-b'))
-    end
-
-    before do
-      MaterialExportItem.create!(material: material_a, profile: 'legacy_drive',
-                                 export_path: '素材/a.png',
-                                 created_by_user: member_user)
-      MaterialExportItem.create!(material: material_b, profile: 'legacy_drive',
-                                 export_path: '素材/b.png',
-                                 created_by_user: member_user)
-    end
-
-    it 'uses material_export_items.export_path as ZIP entry paths' do
-      get '/materials/download.zip', params: { profile: 'legacy_drive' }
-
-      expect(response).to have_http_status(:ok)
-      expect(response.media_type).to eq('application/zip')
-      expect(response.body.b).to include('素材/a.png'.b)
-      expect(response.body.b).to include('素材/b.png'.b)
-    end
-
-    it 'filters by tag_id' do
-      get '/materials/download.zip', params: { profile: 'legacy_drive', tag_id: tag_a.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(response.body.b).to include('素材/a.png'.b)
-      expect(response.body.b).not_to include('素材/b.png'.b)
-    end
-
-    it 'does not include disabled export items' do
-      material_b.material_export_items.first.update!(enabled: false)
-
-      get '/materials/download.zip', params: { profile: 'legacy_drive' }
-
-      expect(response).to have_http_status(:ok)
-      expect(response.body.b).to include('素材/a.png'.b)
-      expect(response.body.b).not_to include('素材/b.png'.b)
-    end
-  end
-
-  describe 'GET /materials/versions' do
-    let!(:tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_history'), category: :material)
-    end
-    let!(:material) do
-      build_material(tag:, user: member_user, file: dummy_upload(filename: 'history.png'))
-    end
-
-    it 'returns material versions in reverse chronological order' do
-      MaterialVersionRecorder.record!(material:, event_type: :create,
-                                      created_by_user: member_user)
-      material.update!(url: 'https://example.com/history')
-      MaterialVersionRecorder.record!(material:, event_type: :update,
-                                      created_by_user: admin_user)
-
-      get '/materials/versions', params: { material_id: material.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json['count']).to eq(2)
-      versions = json.fetch('versions')
-      expect(versions.map { |v| v['version_no'] }).to eq([2, 1])
-      expect(versions.first).to include(
-        'material_id' => material.id,
-        'event_type' => 'update',
-        'tag_name' => 'material_history',
-        'file_filename' => 'history.png',
-        'url' => 'https://example.com/history'
-      )
-      expect(versions.first['created_by_user']).to include('id' => admin_user.id)
-    end
-
-    it 'filters material versions by tag and event_type' do
-      MaterialVersionRecorder.record!(material:, event_type: :create,
-                                      created_by_user: member_user)
-
-      get '/materials/versions', params: {
-        tag: 'material_history',
-        event_type: 'create'
-      }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.fetch('versions').map { |v| v['material_id'] }).to include(material.id)
-      expect(json.fetch('versions').map { |v| v['event_type'] }).to all(eq('create'))
-    end
-  end
-
-  describe 'material sync suppressions' do
-    it 'requires member permission for index' do
-      sign_out
-
-      get '/materials/suppressions'
-
-      expect(response).to have_http_status(:unauthorized)
-    end
-
-    it 'creates source suppression as member' do
-      sign_in_as(member_user)
-
-      expect do
-        post '/materials/suppressions', params: {
-          source_kind: 'google_drive_path_prefix',
-          drive_path: '伊地知ニジカ/危険素材',
-          reason: 'copyright_high_risk'
-        }
-      end.to change(MaterialSyncSuppression, :count).by(1)
-
-      expect(response).to have_http_status(:created)
-      expect(json).to include(
-        'source_kind' => 'google_drive_path_prefix',
-        'drive_path' => '伊地知ニジカ/危険素材',
-        'normalized_source_key' => 'google_drive_path_prefix:伊地知ニジカ/危険素材'
-      )
     end
   end
 
   describe 'DELETE /materials/:id' do
-    let!(:tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'material_destroy'), category: :material)
-    end
+    let!(:tag) { Tag.create!(tag_name: TagName.create!(name: 'material_destroy'), category: :material) }
     let!(:material) do
       build_material(tag:, user: member_user, file: dummy_upload(filename: 'destroy.png'))
     end

backend/spec/requests/posts_spec.rb

@@ -1,5 +1,4 @@
 require 'rails_helper'
-require 'base64'
 require 'set'
 
 include ActiveSupport::Testing::TimeHelpers
@@ -9,11 +8,6 @@ RSpec.describe 'Posts API', type: :request do
   # resized_thumbnail! が MiniMagick 依存でコケやすいので request spec ではスタブしとくのが無難。
   before do
     allow_any_instance_of(Post).to receive(:resized_thumbnail!).and_return(true)
-    allow(Post).to receive(:resized_thumbnail_attachment).and_return(
-      io: StringIO.new('dummy'),
-      filename: 'resized_thumbnail.jpg',
-      content_type: 'image/jpeg'
-    )
   end
 
   def create_nico_tag!(name)
@@ -25,18 +19,6 @@ RSpec.describe 'Posts API', type: :request do
     Rack::Test::UploadedFile.new(StringIO.new('dummy'), 'image/jpeg', original_filename: 'dummy.jpg')
   end
 
-  def real_thumbnail_upload
-    gif =
-        Base64.decode64(
-            'R0lGODdhAQABAIABAP///wAAACwAAAAAAQABAAACAkQBADs=')
-
-    Rack::Test::UploadedFile.new(
-      StringIO.new(gif),
-      'image/gif',
-      original_filename: 'thumbnail.gif'
-    )
-  end
-
   def post_write_params params = { }
     { parent_post_ids: '' }.merge(params)
   end
@@ -535,24 +517,6 @@ RSpec.describe 'Posts API', type: :request do
         expect([true, false]).to include(json['viewed'])
       end
 
-      it 'omits deprecated tags' do
-        deprecated_tag = Tag.create!(
-          name: 'deprecated_post_tag',
-          category: :general,
-          deprecated_at: Time.current
-        )
-        PostTag.create!(post: post_record, tag: deprecated_tag)
-
-        request
-
-        expect(response).to have_http_status(:ok)
-        tag_names = json.fetch('tags').flat_map { |node|
-          [node.fetch('name')] + node.fetch('children').map { |child| child.fetch('name') }
-        }
-        expect(tag_names).to include('spec_tag')
-        expect(tag_names).not_to include('deprecated_post_tag')
-      end
-
       context 'when post has parent, child, and sibling posts' do
         let!(:parent_post) do
           create_parent_post!(
@@ -714,66 +678,6 @@ RSpec.describe 'Posts API', type: :request do
       expect(json['tags'][0]).to have_key('name')
     end
 
-    it '201 when posting manually with a thumbnail' do
-      sign_in_as(member)
-      allow(Post).to receive(:resized_thumbnail_attachment).and_call_original
-
-      post '/posts', params: post_write_params(
-        title: 'thumbnail post',
-        url: 'https://example.com/thumbnail-post',
-        tags: 'spec_tag',
-        thumbnail: real_thumbnail_upload
-      )
-
-      expect(response).to have_http_status(:created)
-      post_record = Post.find(json.fetch('id'))
-      expect(post_record.thumbnail).to be_attached
-      expect(post_record.thumbnail.blob.content_type).to eq('image/jpeg')
-      expect { post_record.thumbnail.download }.not_to raise_error
-    end
-
-    it 'resizes the thumbnail before the create transaction begins' do
-      sign_in_as(member)
-
-      open_transactions = []
-      baseline_open_transactions = Post.connection.open_transactions
-      allow(Post).to receive(:resized_thumbnail_attachment) do |_upload|
-        open_transactions << Post.connection.open_transactions
-        { io: StringIO.new('dummy'),
-          filename: 'resized_thumbnail.jpg',
-          content_type: 'image/jpeg' }
-      end
-
-      post '/posts', params: post_write_params(
-        title: 'transaction post',
-        url: 'https://example.com/transaction-post',
-        tags: 'spec_tag',
-        thumbnail: dummy_upload
-      )
-
-      expect(response).to have_http_status(:created)
-      expect(open_transactions).to eq([baseline_open_transactions])
-    end
-
-    it 'returns 422 and does not create a post when thumbnail resize fails' do
-      sign_in_as(member)
-      allow(Post).to receive(:resized_thumbnail_attachment).and_raise(MiniMagick::Error)
-
-      expect {
-        post '/posts', params: post_write_params(
-          title: 'broken thumbnail post',
-          url: 'https://example.com/broken-thumbnail-post',
-          tags: 'spec_tag',
-          thumbnail: dummy_upload
-        )
-      }.not_to change(Post, :count)
-
-      expect(response).to have_http_status(:unprocessable_entity)
-      expect(json.fetch('errors')).to include(
-        'thumbnail' => ['サムネイル画像の変換に失敗しました．']
-      )
-    end
-
     it '201 and creates post + tags when member and tags have aliases' do
       sign_in_as(member)
 
@@ -793,58 +697,6 @@ RSpec.describe 'Posts API', type: :request do
       expect(names).not_to include('manko')
     end
 
-    it 'rejects a deprecated tag specified directly' do
-      Tag.create!(
-        name: 'deprecated_direct_tag',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      sign_in_as(member)
-
-      post '/posts', params: post_write_params(
-        title: 'new post',
-        url: 'https://example.com/deprecated-direct-tag',
-        tags: 'deprecated_direct_tag',
-        thumbnail: dummy_upload
-      )
-
-      expect(response).to have_http_status(:unprocessable_entity)
-      expect(json.fetch('errors')).to include(
-        'tags' => ['廃止済みタグは付与できません．']
-      )
-    end
-
-    it 'expands through multiple deprecated parent tags and saves active ancestors' do
-      child = Tag.create!(name: 'active_child', category: :general)
-      deprecated_parent = Tag.create!(
-        name: 'deprecated_parent',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      deprecated_grandparent = Tag.create!(
-        name: 'deprecated_grandparent',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      active_grandparent = Tag.create!(name: 'active_grandparent', category: :general)
-      TagImplication.create!(tag: child, parent_tag: deprecated_parent)
-      TagImplication.create!(tag: deprecated_parent, parent_tag: deprecated_grandparent)
-      TagImplication.create!(tag: deprecated_grandparent, parent_tag: active_grandparent)
-      sign_in_as(member)
-
-      post '/posts', params: post_write_params(
-        title: 'expanded post',
-        url: 'https://example.com/expanded-deprecated-parent',
-        tags: 'active_child',
-        thumbnail: dummy_upload
-      )
-
-      expect(response).to have_http_status(:created)
-      saved_names = Post.find(json.fetch('id')).tags.map(&:name)
-      expect(saved_names).to include('active_child', 'active_grandparent')
-      expect(saved_names).not_to include('deprecated_parent', 'deprecated_grandparent')
-    end
-
     context "when nico tag already exists in tags" do
       before do
         Tag.find_undiscard_or_create_by!(
@@ -1078,26 +930,6 @@ RSpec.describe 'Posts API', type: :request do
       expect(names).to include('spec_tag_2')
     end
 
-    it 'rejects a deprecated tag specified directly' do
-      Tag.create!(
-        name: 'deprecated_update_tag',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      sign_in_as(member)
-
-      put "/posts/#{ post_record.id }", params: post_update_params(
-        post_record,
-        title: 'updated title',
-        tags: 'deprecated_update_tag'
-      )
-
-      expect(response).to have_http_status(:unprocessable_entity)
-      expect(json.fetch('errors')).to include(
-        'tags' => ['廃止済みタグは付与できません．']
-      )
-    end
-
     context "when nico tag already exists in tags" do
       before do
         Tag.find_undiscard_or_create_by!(

backend/spec/requests/tag_children_spec.rb

@@ -56,17 +56,6 @@ RSpec.describe "TagChildren", type: :request do
 
         expect(response).to have_http_status(:no_content)
       end
-
-      it 'returns 422 and does not create relation when the new link makes a cycle' do
-        TagImplication.create!(tag: parent, parent_tag: child)
-
-        expect {
-          do_request
-        }.not_to change(TagImplication, :count)
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(TagImplication.where(tag: child, parent_tag: parent)).not_to exist
-      end
     end
 
     context "when Tag.find raises (invalid ids)" do

backend/spec/requests/tag_versions_spec.rb

@@ -21,7 +21,6 @@ RSpec.describe 'TagVersions API', type: :request do
     event_type:,
     name:,
     category:,
-    deprecated_at: nil,
     aliases: [],
     parent_tags: [],
     created_by_user:,
@@ -34,7 +33,6 @@ RSpec.describe 'TagVersions API', type: :request do
             event_type: event_type,
             name: name,
             category: category,
-            deprecated_at: deprecated_at,
             aliases: Array(aliases).join(' '),
             parent_tag_ids: Array(parent_tags).map(&:id).join(' '),
             created_by_user: created_by_user,
@@ -67,7 +65,6 @@ RSpec.describe 'TagVersions API', type: :request do
       event_type: 'update',
       name: 'new_tag_name',
       category: 'meme',
-      deprecated_at: t_v2,
       aliases: ['alias_shared', 'alias_new'],
       parent_tags: [parent_shared, parent_new],
       created_by_user: member,
@@ -136,10 +133,6 @@ RSpec.describe 'TagVersions API', type: :request do
         'current' => 'meme',
         'prev' => 'general'
       )
-      expect(latest.fetch('deprecated_at')).to eq(
-        'current' => t_v2.iso8601,
-        'prev' => nil
-      )
       expect(latest.fetch('aliases')).to include(
         { 'name' => 'alias_shared', 'type' => 'context' },
         { 'name' => 'alias_new', 'type' => 'added' },
@@ -185,10 +178,6 @@ RSpec.describe 'TagVersions API', type: :request do
         'current' => 'general',
         'prev' => nil
       )
-      expect(first.fetch('deprecated_at')).to eq(
-        'current' => nil,
-        'prev' => nil
-      )
       expect(first.fetch('aliases')).to include(
         { 'name' => 'alias_shared', 'type' => 'added' },
         { 'name' => 'alias_old', 'type' => 'added' }

backend/spec/requests/tag_wiki_history_integrity_spec.rb

@@ -89,7 +89,6 @@ RSpec.describe 'Tag and wiki history integrity', type: :request do
           category: 'general',
           aliases: '',
           parent_tags: '',
-          deprecated: '0',
         }
       }
           .to change(TagVersion, :count).by(2)
@@ -124,7 +123,6 @@ RSpec.describe 'Tag and wiki history integrity', type: :request do
           category: 'meme',
           aliases: '',
           parent_tags: '',
-          deprecated: '0',
         }
       }
           .to change(TagVersion, :count).by(2)
@@ -151,7 +149,6 @@ RSpec.describe 'Tag and wiki history integrity', type: :request do
           category: 'general',
           aliases: 'put_tag_alias_only_alias',
           parent_tags: '',
-          deprecated: '0',
         }
       }
           .to change(TagVersion, :count).by(2)

backend/spec/requests/tags_spec.rb

@@ -76,27 +76,6 @@ RSpec.describe 'Tags API', type: :request do
       expect(response_tags.first['id']).to eq(meme.id)
     end
 
-    it 'filters tags by deprecated state' do
-      deprecated_tag = Tag.create!(
-        name: 'deprecated_filter',
-        category: :general,
-        deprecated_at: 1.day.from_now
-      )
-      active_tag = Tag.create!(name: 'active_filter', category: :general)
-
-      get '/tags', params: { name: '_filter', deprecated: '1' }
-
-      expect(response).to have_http_status(:ok)
-      expect(response_names).to include(deprecated_tag.name)
-      expect(response_names).not_to include(active_tag.name)
-
-      get '/tags', params: { name: '_filter', deprecated: '0' }
-
-      expect(response).to have_http_status(:ok)
-      expect(response_names).to include(active_tag.name)
-      expect(response_names).not_to include(deprecated_tag.name)
-    end
-
     it 'filters tags by post_count range' do
       low = Tag.create!(tag_name: TagName.create!(name: 'pc_low'), category: :general)
       mid = Tag.create!(tag_name: TagName.create!(name: 'pc_mid'), category: :general)
@@ -322,21 +301,6 @@ RSpec.describe 'Tags API', type: :request do
       expect(t['matched_alias']).to eq('unko')
       expect(json.map { |x| x['name'] }).not_to include('unknown')
     end
-
-    it 'omits deprecated tags' do
-      deprecated_tag = Tag.create!(
-        name: 'spec_deprecated',
-        category: :general,
-        deprecated_at: Time.current
-      )
-      deprecated_tag.update_columns(post_count: 1)
-
-      get '/tags/autocomplete', params: { q: 'spec_', present: '0' }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.map { |item| item.fetch('name') }).to include('spec_tag')
-      expect(json.map { |item| item.fetch('name') }).not_to include('spec_deprecated')
-    end
   end
 
   describe 'GET /tags/name/:name' do
@@ -473,32 +437,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(versions.second.created_by_user_id).to eq(member_user.id)
       end
 
-      it 'updates deprecated state and records it in tag versions' do
-        expect {
-          patch "/tags/#{ tag.id }", params: { deprecated: '1' }
-        }.to change(TagVersion, :count).by(2)
-
-        expect(response).to have_http_status(:ok)
-        expect(tag.reload.deprecated_at).to be_present
-
-        versions = tag.tag_versions.order(:version_no)
-        expect(versions.first.deprecated_at).to be_nil
-        expect(versions.second.deprecated_at).to eq(tag.deprecated_at)
-        expect(json.fetch('deprecated_at')).to be_present
-      end
-
-      it 'rejects deprecating a nico tag' do
-        nico_tag = Tag.create!(name: 'nico:deprecated_update', category: :nico)
-
-        patch "/tags/#{ nico_tag.id }", params: { deprecated: '1' }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(nico_tag.reload.deprecated_at).to be_nil
-        expect(json.fetch('errors')).to include(
-          'deprecated' => ['ニコタグは廃止できません．']
-        )
-      end
-
       it 'returns 422 when changing normal tag category to nico' do
         expect {
           patch "/tags/#{tag.id}", params: { category: 'nico' }
@@ -581,58 +519,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(response).to have_http_status(:ok)
         expect(wiki_page.reload.wiki_versions.count).to eq(before_wiki_version_count)
       end
-
-      it 'full update で旧名 alias が残った tag を PATCH で旧名へ戻せる' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'patch_roundtrip_target',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: '',
-          deprecated: '0',
-        }
-
-        expect(response).to have_http_status(:ok)
-        expect(TagName.find_by!(name: 'spec_tag').canonical).to eq(tag.reload.tag_name)
-
-        patch "/tags/#{ tag.id }", params: { name: 'spec_tag' }
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-
-        expect(tag.name).to eq('spec_tag')
-        expect(tag.tag_name.canonical_id).to be_nil
-        expect(TagName.find_by!(name: 'patch_roundtrip_target').canonical).to eq(tag.tag_name)
-      end
-
-      it '別 tag の正規名には変更できない' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'patch collision wiki',
-                created_by_user: member_user,
-                message: 'init')
-
-        patch "/tags/#{ tag.id }", params: { name: 'unknown' }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to include(
-          'name' => ['その名前は既に使はれてゐます．']
-        )
-
-        expect(tag.reload.name).to eq('spec_tag')
-        expect(tag.tag_name.aliases.map(&:name)).to contain_exactly('unko')
-        expect(wiki_page.reload.tag_name).to eq(tag.tag_name)
-      end
-
-      it 'system tag の name は変更できない' do
-        system_tag = Tag.bot
-
-        patch "/tags/#{ system_tag.id }", params: { name: 'patch_system_tag_renamed' }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(system_tag.reload.name).to eq('bot操作')
-      end
     end
   end
 
@@ -699,121 +585,6 @@ RSpec.describe 'Tags API', type: :request do
       expect(row['has_children']).to eq(true)
       expect(row['children']).to eq([])
     end
-
-    it 'passes through deprecated tags when finding children' do
-      deprecated_middle = Tag.create!(
-        name: 'depth_deprecated_middle',
-        category: :character,
-        deprecated_at: Time.current
-      )
-      visible_descendant = Tag.create!(
-        name: 'depth_visible_descendant',
-        category: :material
-      )
-      TagImplication.create!(parent_tag: root_material, tag: deprecated_middle)
-      TagImplication.create!(parent_tag: deprecated_middle, tag: visible_descendant)
-
-      get '/tags/with-depth', params: { parent: root_material.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.map { |item| item.fetch('name') }).to eq(['depth_visible_descendant'])
-      expect(json.map { |item| item.fetch('name') }).not_to include('depth_deprecated_middle')
-    end
-
-    it 'passes through multiple deprecated tags for roots and has_children' do
-      active_child = Tag.create!(
-        name: 'depth_active_child_below_deprecated',
-        category: :character
-      )
-      deprecated_parent = Tag.create!(
-        name: 'depth_deprecated_parent',
-        category: :character,
-        deprecated_at: Time.current
-      )
-      deprecated_grandparent = Tag.create!(
-        name: 'depth_deprecated_grandparent',
-        category: :material,
-        deprecated_at: Time.current
-      )
-      active_ancestor = Tag.create!(
-        name: 'depth_active_ancestor',
-        category: :meme
-      )
-      TagImplication.create!(tag: active_child, parent_tag: deprecated_parent)
-      TagImplication.create!(tag: deprecated_parent, parent_tag: deprecated_grandparent)
-      TagImplication.create!(tag: deprecated_grandparent, parent_tag: active_ancestor)
-
-      get '/tags/with-depth'
-
-      root_names = json.map { |item| item.fetch('name') }
-      expect(root_names).to include('depth_active_ancestor')
-      expect(root_names).not_to include('depth_active_child_below_deprecated')
-      ancestor_json = json.find { |item| item.fetch('id') == active_ancestor.id }
-      expect(ancestor_json.fetch('has_children')).to eq(true)
-
-      get '/tags/with-depth', params: { parent: active_ancestor.id }
-
-      expect(json.map { |item| item.fetch('name') }).to include(
-        'depth_active_child_below_deprecated'
-      )
-      expect(json.map { |item| item.fetch('name') }).not_to include(
-        'depth_deprecated_parent',
-        'depth_deprecated_grandparent'
-      )
-    end
-
-    it 'treats an active tag with only deprecated ancestors as a root' do
-      active_child = Tag.create!(
-        name: 'depth_root_below_deprecated',
-        category: :character
-      )
-      deprecated_parent = Tag.create!(
-        name: 'depth_root_deprecated_parent',
-        category: :material,
-        deprecated_at: Time.current
-      )
-      TagImplication.create!(tag: active_child, parent_tag: deprecated_parent)
-
-      get '/tags/with-depth'
-
-      expect(json.map { |item| item.fetch('name') }).to include(
-        'depth_root_below_deprecated'
-      )
-      expect(json.map { |item| item.fetch('name') }).not_to include(
-        'depth_root_deprecated_parent'
-      )
-    end
-
-    it 'terminates when deprecated implications contain a cycle' do
-      first = Tag.create!(
-        name: 'depth_cycle_first',
-        category: :character,
-        deprecated_at: Time.current
-      )
-      second = Tag.create!(
-        name: 'depth_cycle_second',
-        category: :material,
-        deprecated_at: Time.current
-      )
-      TagImplication.create!(tag: first, parent_tag: root_material)
-      TagImplication.create!(tag: second, parent_tag: first)
-      now = Time.current
-      TagImplication.insert_all!(
-        [
-          {
-            tag_id: first.id,
-            parent_tag_id: second.id,
-            created_at: now,
-            updated_at: now
-          }
-        ]
-      )
-
-      get '/tags/with-depth', params: { parent: root_material.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json).to eq([])
-    end
   end
 
   describe 'GET /tags/name/:name/materials' do
@@ -961,20 +732,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(tag.category).to eq('general')
       end
 
-      it 'deprecated がなければ 422 を返す' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'new',
-          category: 'general',
-          aliases: '',
-          parent_tags: '',
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-        expect(json.fetch('errors')).to include(
-          'deprecated' => ['廃止状態は必須です．']
-        )
-      end
-
       it 'name, category, aliases, parent tags をまとめて更新できる' do
         old_parent = Tag.create!(
           tag_name: TagName.create!(name: 'put_old_parent'),
@@ -992,7 +749,6 @@ RSpec.describe 'Tags API', type: :request do
           category: 'meme',
           aliases: 'put_alias_a put_alias_b put_alias_a',
           parent_tags: 'put_kept_parent put_new_parent',
-          deprecated: '0',
         }
 
         expect(response).to have_http_status(:ok)
@@ -1037,7 +793,6 @@ RSpec.describe 'Tags API', type: :request do
           category: 'general',
           aliases: 'spec_tag put_alias_self_test',
           parent_tags: '',
-          deprecated: '0',
         }
 
         expect(response).to have_http_status(:ok)
@@ -1055,7 +810,6 @@ RSpec.describe 'Tags API', type: :request do
           category: 'general',
           aliases: 'unko',
           parent_tags: 'spec_tag',
-          deprecated: '0',
         }
 
         expect(response).to have_http_status(:ok)
@@ -1071,7 +825,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'meta',
             aliases: '',
             parent_tags: '',
-            deprecated: '0',
           }
         }.to change(TagVersion, :count).by(2)
 
@@ -1091,42 +844,6 @@ RSpec.describe 'Tags API', type: :request do
         expect(versions.second.created_by_user_id).to eq(member_user.id)
       end
 
-      it '同じ tag の旧 alias へ戻しても rename できる' do
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_roundtrip_b',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: '',
-          deprecated: '0',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        put "/tags/#{ tag.id }", params: {
-          name: 'spec_tag',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: '',
-          deprecated: '0',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-
-        expect(tag.name).to eq('spec_tag')
-        expect(TagName.find_by!(name: 'put_roundtrip_b').canonical).to eq(tag.tag_name)
-        expect(tag.tag_name.aliases.map(&:name)).to contain_exactly('put_roundtrip_b', 'unko')
-        expect(tag.tag_name.aliases.map(&:name)).not_to include('spec_tag')
-        expect(alias_tn.reload.canonical).to eq(tag.tag_name)
-
-        version = tag.tag_versions.order(:version_no).last
-
-        expect(version.event_type).to eq('update')
-        expect(version.name).to eq('spec_tag')
-        expect(version.aliases.split).to contain_exactly('put_roundtrip_b', 'unko')
-      end
-
       it 'parent tag の snapshot も作成する' do
         old_parent = Tag.create!(
           tag_name: TagName.create!(name: 'put_snapshot_old_parent'),
@@ -1143,7 +860,6 @@ RSpec.describe 'Tags API', type: :request do
           category: 'general',
           aliases: 'unko',
           parent_tags: new_parent.name,
-          deprecated: '0',
         }
 
         expect(response).to have_http_status(:ok)
@@ -1159,7 +875,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'nico',
             aliases: '',
             parent_tags: '',
-            deprecated: '0',
           }
         }.not_to change(TagVersion, :count)
 
@@ -1181,7 +896,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'nico',
             aliases: '',
             parent_tags: '',
-            deprecated: '0',
           }
         }.not_to change(NicoTagVersion, :count)
 
@@ -1202,7 +916,6 @@ RSpec.describe 'Tags API', type: :request do
             category: old_category,
             aliases: '',
             parent_tags: '',
-            deprecated: '0',
           }
         }.not_to change(TagVersion, :count)
 
@@ -1233,7 +946,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'meme',
             aliases: 'unko',
             parent_tags: '',
-            deprecated: '0',
           }
         }
             .to change(TagVersion, :count).by(2)
@@ -1251,48 +963,6 @@ RSpec.describe 'Tags API', type: :request do
         )
       end
 
-      it 'wiki を持つ tag を旧 alias へ戻しても wiki を新 canonical へ移す' do
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'wiki body before',
-                created_by_user: member_user,
-                message: 'init')
-
-        expect {
-          put "/tags/#{ tag.id }", params: {
-            name: 'put_wiki_roundtrip_b',
-            category: 'general',
-            aliases: 'unko',
-            parent_tags: '',
-            deprecated: '0',
-          }
-
-          put "/tags/#{ tag.id }", params: {
-            name: 'spec_tag',
-            category: 'general',
-            aliases: 'unko',
-            parent_tags: '',
-            deprecated: '0',
-          }
-        }
-            .to change(TagVersion, :count).by(3)
-            .and change(WikiVersion, :count).by(2)
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-
-        expect(wiki_page.reload.tag_name).to eq(tag.tag_name)
-        expect(TagName.find_by!(name: 'put_wiki_roundtrip_b').wiki_page).to be_nil
-        expect(TagName.find_by!(name: 'put_wiki_roundtrip_b').canonical).to eq(tag.tag_name)
-
-        versions = wiki_page.wiki_versions.order(:version_no).last(2)
-
-        expect(versions.map(&:event_type)).to eq(['update', 'update'])
-        expect(versions.map(&:title)).to eq(['put_wiki_roundtrip_b', 'spec_tag'])
-      end
-
       it '別名を他 tag から奪った場合、奪はれた側の tag version も作成する' do
         old_owner = Tag.create!(
           tag_name: TagName.create!(name: 'put_alias_old_owner'),
@@ -1311,7 +981,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'general',
             aliases: 'unko put_stolen_alias',
             parent_tags: '',
-            deprecated: '0',
           }
         }
             .to change { tag.reload.tag_versions.count }.by(2)
@@ -1331,49 +1000,9 @@ RSpec.describe 'Tags API', type: :request do
         expect(old_owner_versions.second.aliases.split).not_to include('put_stolen_alias')
       end
 
-      it '別 tag の alias 名を rename で奪へる' do
-        old_owner = Tag.create!(
-          tag_name: TagName.create!(name: 'put_alias_collision_owner'),
-          category: :general
-        )
-        stolen_alias = TagName.create!(
-          name: 'put_alias_collision_name',
-          canonical: old_owner.tag_name
-        )
-        wiki_page =
-            Wiki::Commit.create_content!(
-                tag_name: tag.tag_name,
-                body: 'put collision wiki',
-                created_by_user: member_user,
-                message: 'init')
-
-        put "/tags/#{ tag.id }", params: {
-          name: 'put_alias_collision_name',
-          category: 'general',
-          aliases: 'unko',
-          parent_tags: '',
-          deprecated: '0',
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        tag.reload
-        old_owner.reload
-        stolen_alias.reload
-
-        expect(tag.name).to eq('put_alias_collision_name')
-        expect(stolen_alias.canonical_id).to be_nil
-        expect(TagName.find_by!(name: 'spec_tag').canonical).to eq(tag.tag_name)
-        expect(old_owner.tag_name.aliases.map(&:name)).not_to include('put_alias_collision_name')
-
-        old_owner_versions = old_owner.tag_versions.order(:version_no)
-
-        expect(old_owner_versions.last.event_type).to eq('update')
-        expect(old_owner_versions.last.aliases.split).not_to include('put_alias_collision_name')
-        expect(wiki_page.reload.tag_name).to eq(tag.tag_name)
-      end
-
       it 'parent_tags に指定すると循環する tag は 422 にする' do
+        pending '#332 で対応予定'
+
         child = Tag.create!(
           tag_name: TagName.create!(name: 'put_cycle_child'),
           category: :general
@@ -1386,7 +1015,6 @@ RSpec.describe 'Tags API', type: :request do
           category: 'general',
           aliases: 'unko',
           parent_tags: child.name,
-          deprecated: '0',
         }
 
         expect(response).to have_http_status(:unprocessable_entity)
@@ -1408,7 +1036,6 @@ RSpec.describe 'Tags API', type: :request do
             category: 'general',
             aliases: 'unko',
             parent_tags: '',
-            deprecated: '0',
           }
         }
             .to change(TagVersion, :count).by(2)

backend/spec/requests/wiki_spec.rb

@@ -18,13 +18,6 @@ RSpec.describe 'Wiki API', type: :request do
         created_by_user: user,
         message: 'init')
   end
-  let!(:tag) do
-    Tag.create!(
-      tag_name: tn,
-      category: :general,
-      deprecated_at: Time.zone.local(2026, 6, 1)
-    )
-  end
 
   describe 'GET /wiki' do
     it 'returns wiki pages with title' do
@@ -37,8 +30,6 @@ RSpec.describe 'Wiki API', type: :request do
 
       expect(json[0]).to have_key('title')
       expect(json.map { |p| p['title'] }).to include('spec_wiki_title')
-      wiki_json = json.find { |item| item.fetch('id') == page.id }
-      expect(wiki_json.fetch('deprecated_at')).to eq(tag.deprecated_at.iso8601(3))
     end
   end
 
@@ -57,8 +48,7 @@ RSpec.describe 'Wiki API', type: :request do
 
         expect(json).to include(
             'id' => page.id,
-            'title' => 'spec_wiki_title',
-            'deprecated_at' => tag.deprecated_at.iso8601(3))
+            'title' => 'spec_wiki_title')
       end
     end
 
@@ -419,11 +409,7 @@ RSpec.describe 'Wiki API', type: :request do
         'kind' => 'content',
         'message' => 'r2'
       )
-      expect(top['wiki_page']).to include(
-        'id' => page.id,
-        'title' => 'spec_wiki_title',
-        'deprecated_at' => tag.deprecated_at.iso8601(3)
-      )
+      expect(top['wiki_page']).to include('id' => page.id, 'title' => 'spec_wiki_title')
       expect(top['user']).to include('id' => user.id, 'name' => user.name)
       expect(top).to have_key('timestamp')
 
@@ -493,7 +479,6 @@ RSpec.describe 'Wiki API', type: :request do
       expect(json).to include(
         'wiki_page_id' => page.id,
         'title' => 'spec_wiki_title',
-        'deprecated_at' => tag.deprecated_at.iso8601(3),
         'older_revision_id' => rev_a.id,
         'newer_revision_id' => rev_b.id
       )

backend/spec/services/material_file_sha256_spec.rb

@@ -1,23 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe MaterialFileSha256 do
-  describe '.metadata_sha256' do
-    it 'reads sha256 from Hash metadata' do
-      blob = instance_double(ActiveStorage::Blob, metadata: { 'sha256' => 'abc123' })
-
-      expect(described_class.metadata_sha256(blob)).to eq('abc123')
-    end
-
-    it 'reads sha256 from JSON string metadata' do
-      blob = instance_double(ActiveStorage::Blob, metadata: '{"sha256":"abc123"}')
-
-      expect(described_class.metadata_sha256(blob)).to eq('abc123')
-    end
-
-    it 'returns nil for invalid metadata' do
-      blob = instance_double(ActiveStorage::Blob, metadata: '{')
-
-      expect(described_class.metadata_sha256(blob)).to be_nil
-    end
-  end
-end

backend/spec/services/material_sync_importer_spec.rb

@@ -1,128 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe MaterialSyncImporter do
-  let(:user) { create(:user, :member) }
-  let(:tag) { Tag.create!(tag_name: TagName.create!(name: 'sync_tag'), category: :material) }
-
-  def tempfile_for body
-    Tempfile.new(['material-sync-importer', '.png']).tap do |file|
-      file.binmode
-      file.write(body)
-      file.rewind
-    end
-  end
-
-  it 'creates an untagged material from a sync candidate with file_downloader' do
-    result =
-        described_class.import!(
-            source_kind: 'google_drive_file',
-            source_path: '素材/a.png',
-            source_file_id: 'drive-file-a',
-            normalized_source_key: 'google_drive_file:drive-file-a',
-            filename: 'a.png',
-            content_type: 'image/png',
-            file_sha256: Digest::SHA256.hexdigest('sync-body'),
-            file_downloader: -> { tempfile_for('sync-body') },
-            export_path: '素材/a.png',
-            tag: nil,
-            url: nil,
-            created_by_user: user,
-            updated_by_user: user)
-
-    material = result.material.reload
-    expect(result.action).to eq(:imported)
-    expect(material.tag).to be_nil
-    expect(material.url).to be_nil
-    expect(material.file).to be_attached
-    expect(material.file.blob.filename.to_s).to eq('a.png')
-    expect(material.material_export_items.first.export_path).to eq('素材/a.png')
-  end
-
-  it 'does not clear a human-assigned tag or URL on existing Drive sync' do
-    material =
-        Material.create!(tag:, url: 'https://example.com/human',
-                         source_kind: 'google_drive_file',
-                         source_path: '素材/a.png',
-                         source_file_id: 'drive-file-a',
-                         created_by_user: user,
-                         updated_by_user: user)
-    material.file.attach(
-        io: StringIO.new('same-body'),
-        filename: 'a.png',
-        content_type: 'image/png')
-    material.file.blob.metadata['sha256'] = Digest::SHA256.hexdigest('same-body')
-    material.file.blob.save!
-    MaterialExportItem.create!(material:,
-                               profile: 'legacy_drive',
-                               export_path: '素材/a.png',
-                               created_by_user: user)
-
-    result =
-        described_class.import!(
-            source_kind: 'google_drive_file',
-            source_path: '素材/a.png',
-            source_file_id: 'drive-file-a',
-            filename: 'a.png',
-            content_type: 'image/png',
-            file_sha256: Digest::SHA256.hexdigest('same-body'),
-            export_path: '素材/a.png',
-            tag: nil,
-            url: nil,
-            updated_by_user: user)
-
-    expect(result.action).to eq(:unchanged)
-    expect(material.reload.tag).to eq(tag)
-    expect(material.url).to eq('https://example.com/human')
-  end
-
-  it 'suppresses a Google Drive candidate by relative path prefix' do
-    MaterialSyncSuppression.create!(source_kind: 'google_drive_path_prefix',
-                                    drive_path: '素材/危険',
-                                    reason: 'copyright_high_risk',
-                                    created_by_user: user)
-
-    result =
-        described_class.import!(
-            source_kind: 'google_drive_file',
-            source_path: '素材/危険/a.png',
-            source_file_id: 'drive-file-b',
-            filename: 'a.png',
-            content_type: 'image/png',
-            file_sha256: Digest::SHA256.hexdigest('blocked-body'),
-            file_downloader: -> { tempfile_for('blocked-body') },
-            export_path: '素材/危険/a.png',
-            updated_by_user: user)
-
-    expect(result.action).to eq(:suppressed)
-    expect(result.suppression.normalized_source_key)
-      .to eq('google_drive_path_prefix:素材/危険')
-    expect(Material.find_by(source_file_id: 'drive-file-b')).to be_nil
-  end
-
-  it 'rechecks import blocks after downloaded file sha256 is known' do
-    MaterialImportBlock.create!(match_kind: 'sha256',
-                                sha256: Digest::SHA256.hexdigest('blocked-body'),
-                                reason: 'copyright_high_risk',
-                                created_by_user: user)
-    blob_count = ActiveStorage::Blob.count
-
-    expect do
-      result =
-          described_class.import!(
-              source_kind: 'google_drive_file',
-              source_path: '素材/blocked.png',
-              source_file_id: 'drive-file-blocked',
-              filename: 'blocked.png',
-              content_type: 'image/png',
-              file_downloader: -> { tempfile_for('blocked-body') },
-              export_path: '素材/blocked.png',
-              updated_by_user: user)
-
-      expect(result.action).to eq(:suppressed)
-      expect(result.suppression.reason).to eq('copyright_high_risk')
-    end.not_to change(Material, :count)
-
-    expect(ActiveStorage::Blob.count).to eq(blob_count)
-    expect(Material.find_by(source_file_id: 'drive-file-blocked')).to be_nil
-  end
-end

backend/spec/services/material_sync_runner_spec.rb

@@ -1,89 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe MaterialSyncRunner do
-  let(:user) { create(:user, :member) }
-  let(:source) do
-    MaterialSyncSource.create!(
-        name: 'Drive source',
-        source_kind: 'google_drive_path',
-        source_file_id: 'folder-123',
-        profile: 'legacy_drive',
-        created_by_user: user,
-        updated_by_user: user)
-  end
-  let(:drive_client) { instance_double(GoogleDrive::ApiClient) }
-
-  describe '#sync!' do
-    it 'imports google drive path candidates as they are yielded' do
-      first_entry = { id: 'file-1',
-                      name: 'a.png',
-                      mime_type: 'image/png',
-                      relative_path: '素材/a.png',
-                      sha256_checksum: 'sha-a',
-                      web_view_link: 'https://drive.google.com/file/d/file-1/view',
-                      web_content_link: nil }
-      second_entry = { id: 'file-2',
-                       name: 'b.png',
-                       mime_type: 'image/png',
-                       relative_path: '素材/b.png',
-                       sha256_checksum: 'sha-b',
-                       web_view_link: 'https://drive.google.com/file/d/file-2/view',
-                       web_content_link: nil }
-      yielded = []
-
-      allow(GoogleDrive::ApiClient).to receive(:new).and_return(drive_client)
-      allow(drive_client).to receive(:each_material_file_under_folder) do |folder_id, &block|
-        expect(folder_id).to eq('folder-123')
-        block.call(first_entry)
-        expect(yielded).to eq(['素材/a.png'])
-        block.call(second_entry)
-      end
-      allow(MaterialSyncImporter).to receive(:import!) do |candidate|
-        yielded << candidate.fetch(:source_path)
-        instance_double(MaterialSyncImporter::Result,
-                        action: yielded.last == '素材/a.png' ? :imported : :updated)
-      end
-
-      result = described_class.new(source).sync!
-
-      expect(yielded).to eq(['素材/a.png', '素材/b.png'])
-      expect(result.imported).to eq(1)
-      expect(result.updated).to eq(1)
-      expect(result.unchanged).to eq(0)
-      expect(source.reload.last_synced_at).to be_present
-    end
-
-    it 'logs google drive path progress at first item and summary' do
-      entry = { id: 'file-1',
-                name: 'a.png',
-                mime_type: 'image/png',
-                relative_path: '素材/a.png',
-                sha256_checksum: 'sha-a',
-                web_view_link: 'https://drive.google.com/file/d/file-1/view',
-                web_content_link: nil }
-      logged = []
-
-      allow(GoogleDrive::ApiClient).to receive(:new).and_return(drive_client)
-      allow(drive_client).to receive(:each_material_file_under_folder) do |_folder_id, &block|
-        block.call(entry)
-      end
-      allow(MaterialSyncImporter).to receive(:import!)
-        .and_return(instance_double(MaterialSyncImporter::Result, action: :imported))
-      allow(Rails.logger).to receive(:info) { |message| logged << JSON.parse(message) }
-
-      described_class.new(source).sync!
-
-      progress_logs = logged.select { |row| row['folder_id'] == 'folder-123' }
-      expect(progress_logs.map { |row| row['progress'] }).to eq(['scan', 'summary'])
-      expect(progress_logs.last).to include(
-          'material_sync_source_id' => source.id,
-          'material_sync_source_name' => 'Drive source',
-          'scanned_count' => 1,
-          'imported' => 1,
-          'updated' => 0,
-          'unchanged' => 0,
-          'suppressed' => 0,
-          'failed' => 0)
-    end
-  end
-end

backend/spec/tasks/post_similarity_calc_spec.rb

@@ -4,12 +4,11 @@ require 'rails_helper'
 RSpec.describe 'post_similarity:calc' do
   include RakeTaskHelper
 
-  it 'calculates similarities from active tags only' do
+  it 'calls Similarity::Calc with Post and :tags' do
     # 必要最低限のデータ
     t1 = Tag.create!(name: "t1")
     t2 = Tag.create!(name: "t2")
     t3 = Tag.create!(name: "t3")
-    deprecated_tag = Tag.create!(name: 'deprecated', deprecated_at: Time.current)
 
     p1 = Post.create!(url: "https://example.com/1")
     p2 = Post.create!(url: "https://example.com/2")
@@ -23,8 +22,6 @@ RSpec.describe 'post_similarity:calc' do
     PostTag.create!(post: p2, tag: t3)
 
     PostTag.create!(post: p3, tag: t3)
-    PostTag.create!(post: p1, tag: deprecated_tag)
-    PostTag.create!(post: p2, tag: deprecated_tag)
 
     expect { run_rake_task("post_similarity:calc") }
       .to change { PostSimilarity.count }.from(0)
@@ -32,6 +29,6 @@ RSpec.describe 'post_similarity:calc' do
     ps = PostSimilarity.find_by!(post_id: p1.id, target_post_id: p2.id)
     ps_rev = PostSimilarity.find_by!(post_id: p2.id, target_post_id: p1.id)
     expect(ps_rev.cos).to eq(ps.cos)
-    expect(ps.cos).to be_within(0.0001).of(0.5)
   end
 end
+

backend/spec/tasks/tag_similarity_calc_spec.rb

@@ -4,12 +4,11 @@ require 'rails_helper'
 RSpec.describe 'tag_similarity:calc' do
   include RakeTaskHelper
 
-  it 'calculates similarities for active tags only' do
+  it 'calls Similarity::Calc with Tag and :posts' do
     # 必要最低限のデータ
     t1 = Tag.create!(name: "t1")
     t2 = Tag.create!(name: "t2")
     t3 = Tag.create!(name: "t3")
-    deprecated_tag = Tag.create!(name: 'deprecated', deprecated_at: Time.current)
 
     p1 = Post.create!(url: "https://example.com/1")
     p2 = Post.create!(url: "https://example.com/2")
@@ -23,7 +22,6 @@ RSpec.describe 'tag_similarity:calc' do
     PostTag.create!(post: p2, tag: t3)
 
     PostTag.create!(post: p3, tag: t3)
-    PostTag.create!(post: p1, tag: deprecated_tag)
 
     expect { run_rake_task("tag_similarity:calc") }
       .to change { TagSimilarity.count }.from(0)
@@ -31,7 +29,6 @@ RSpec.describe 'tag_similarity:calc' do
     ps = TagSimilarity.find_by!(tag_id: t1.id, target_tag_id: t2.id)
     ps_rev = TagSimilarity.find_by!(tag_id: t2.id, target_tag_id: t1.id)
     expect(ps_rev.cos).to eq(ps.cos)
-    expect(TagSimilarity.where(tag_id: deprecated_tag.id)).to be_empty
-    expect(TagSimilarity.where(target_tag_id: deprecated_tag.id)).to be_empty
   end
 end
+

docs/commands.md

@@ -10,15 +10,6 @@ bundle exec rspec
 bundle exec rails routes
 ```
 
-Material video thumbnail generation requires `ffmpeg` on the host. If `ffmpeg`
-is missing or frame extraction fails, `MaterialThumbnailGenerator` logs the
-result and stderr, then leaves the existing thumbnail unchanged.
-
-```sh
-cd backend
-bundle exec rails materials:thumbnails:backfill
-```
-
 ## Frontend
 
 ```sh

frontend/src/App.tsx

@@ -6,7 +6,6 @@ import { BrowserRouter,
 	 Routes,
 	 useLocation } from 'react-router-dom'
 
-import DevModeWatermark from '@/components/DevModeWatermark'
 import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
 import DialogueProvider from '@/components/dialogues/DialogueProvider'
@@ -15,10 +14,8 @@ import { apiPost, isApiError } from '@/lib/api'
 import DeerjikistDetailPage from '@/pages/deerjikists/DeerjikistDetailPage'
 import MaterialBasePage from '@/pages/materials/MaterialBasePage'
 import MaterialDetailPage from '@/pages/materials/MaterialDetailPage'
-import MaterialHistoryPage from '@/pages/materials/MaterialHistoryPage'
 import MaterialListPage from '@/pages/materials/MaterialListPage'
 import MaterialNewPage from '@/pages/materials/MaterialNewPage'
-import MaterialSyncSuppressionsPage from '@/pages/materials/MaterialSyncSuppressionsPage'
 // import MaterialSearchPage from '@/pages/materials/MaterialSearchPage'
 import MorePage from '@/pages/MorePage'
 import GekanatorPage from '@/pages/GekanatorPage'
@@ -71,11 +68,10 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	  <Route path="/theatres/:id" element={<TheatreDetailPage user={user}/>}/>
 	  <Route path="/materials" element={<MaterialBasePage/>}>
 	    <Route index element={<MaterialListPage/>}/>
-	    <Route path="changes" element={<MaterialHistoryPage/>}/>
 	    <Route path="new" element={<MaterialNewPage/>}/>
-	    <Route path="suppressions" element={<MaterialSyncSuppressionsPage/>}/>
 	    <Route path=":id" element ={<MaterialDetailPage/>}/>
 	  </Route>
+	  {/* <Route path="/materials/search" element={<MaterialSearchPage/>}/> */}
 	  <Route path="/wiki" element={<WikiSearchPage/>}/>
 	  <Route path="/wiki/:title" element={<WikiDetailPage/>}/>
 	  <Route path="/wiki/new" element={<WikiNewPage user={user}/>}/>
@@ -146,7 +142,6 @@ const App: FC = () => {
   return (
       <>
 	<RouteBlockerOverlay/>
-	{import.meta.env.DEV && <DevModeWatermark/>}
 
 	<BrowserRouter>
 	  <DialogueProvider>
@@ -154,7 +149,7 @@ const App: FC = () => {
 	      <motion.div
 		  layout="position"
 		  transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-		  className="relative flex flex-col h-dvh w-full overflow-y-hidden">
+		  className="flex flex-col h-dvh w-full overflow-y-hidden">
 		<TopNav user={user}/>
 		<RouteTransitionWrapper user={user} setUser={setUser}/>
 	      </motion.div>

frontend/src/components/DevModeWatermark.tsx

@@ -1,46 +0,0 @@
-import nikumaru from '@/assets/fonts/nikumaru.otf'
-
-import type { FC } from 'react'
-
-
-const ROW_COUNT = 8
-const COLUMN_COUNT = 12
-
-
-const DevModeWatermark: FC = () => {
-  return (
-      <div
-	  aria-hidden="true"
-	  className="pointer-events-none select-none fixed inset-0 overflow-hidden z-0">
-	<style>{`
-	  @font-face {
-	    font-family: 'Nikumaru';
-	    src: url(${nikumaru}) format('opentype');
-	  }
-	`}</style>
-	<div className="absolute -inset-32 flex flex-col justify-center gap-12 py-48">
-	  {Array.from ({ length: ROW_COUNT }, (_, rowIndex) => (
-	      <div
-		  key={rowIndex}
-		  className={
-		      'flex min-h-32 items-center gap-12 '
-		      + (rowIndex % 2 === 0 ? 'translate-x-0' : 'translate-x-32')
-		  }>
-		{Array.from ({ length: COLUMN_COUNT }, (_, columnIndex) => (
-		    <span
-			key={columnIndex}
-			className={
-			    'whitespace-nowrap text-3xl font-bold '
-			    + 'tracking-[0.3em] text-neutral-950/5 '
-			    + 'dark:text-white/10'
-			}
-			style={{ fontFamily: 'Nikumaru' }}>
-		      開発モード
-		    </span>))}
-	      </div>))}
-	</div>
-      </div>)
-}
-
-
-export default DevModeWatermark

frontend/src/components/DraggableDroppableTagRow.tsx

@@ -87,13 +87,10 @@ const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTa
 	    setDropRef (node)
 	  }}
 	  style={style}
-	  className={cn (
-	      'min-w-0 max-w-full overflow-hidden rounded select-none',
-	      over && 'ring-2 ring-offset-2')}
+	  className={cn ('rounded select-none', over && 'ring-2 ring-offset-2')}
 	  {...attributes}
 	  {...listeners}>
 	<motion.div
-	    className="flex min-w-0 max-w-full items-baseline overflow-hidden"
 	    transition={{ layout: { duration: .2, ease: 'easeOut' } }}
 	    layoutId={`tag-${ sp ? 'sp-' : '' }${ tag.id }`}>
 	  <TagLink tag={tag} nestLevel={nestLevel}/>
@@ -101,4 +98,4 @@ const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTa
       </div>)
 }
 
-export default DraggableDroppableTagRow
+export default DraggableDroppableTagRow

frontend/src/components/MaterialSidebar.tsx

@@ -1,43 +1,23 @@
-import { useQuery } from '@tanstack/react-query'
-import { useEffect, useRef, useState } from 'react'
-import { useLocation, useNavigate } from 'react-router-dom'
+import { Fragment, useEffect, useState } from 'react'
 
-import SidebarComponent from '@/components/layout/SidebarComponent'
 import TagLink from '@/components/TagLink'
-import { fetchMaterialTagTree, parseMaterialFilter } from '@/lib/materials'
-import { materialsKeys } from '@/lib/queryKeys'
-import { cn } from '@/lib/utils'
+import SidebarComponent from '@/components/layout/SidebarComponent'
+import { apiGet } from '@/lib/api'
 
-import type { CSSProperties, Dispatch, FC, ReactNode, SetStateAction } from 'react'
+import type { FC, ReactNode } from 'react'
 
-import type { MaterialFilter, MaterialSidebarTag, Tag } from '@/types'
+import type { Tag } from '@/types'
 
-const FILTERS: MaterialFilter[] = ['missing', 'present', 'any']
-const FILTER_LABELS: Record<MaterialFilter, string> = { present: '有', missing: '無', any: '全' }
-
-
-const px = (value: string): number => {
-  const parsed = Number.parseFloat (value)
-  return Number.isFinite (parsed) ? parsed : 0
-}
-
-
-const verticalChrome = (el: HTMLElement): number => {
-  const style = window.getComputedStyle (el)
-
-  return (
-      px (style.paddingTop)
-      + px (style.paddingBottom)
-      + px (style.borderTopWidth)
-      + px (style.borderBottomWidth))
-}
+type TagWithDepth = Tag & {
+    hasChildren:  boolean
+    children:     TagWithDepth[] }
 
 
 const setChildrenById = (
-    tags:     MaterialSidebarTag[],
+    tags:     TagWithDepth[],
     targetId: number,
-    children: MaterialSidebarTag[],
-): MaterialSidebarTag[] => (
+    children: TagWithDepth[],
+): TagWithDepth[] => (
     tags.map (tag => {
       if (tag.id === targetId)
 	return { ...tag, children }
@@ -45,470 +25,75 @@ const setChildrenById = (
       if (tag.children.length === 0)
 	return tag
 
-      return { ...tag, children: setChildrenById (tag.children, targetId, children) }
+      return { ...tag,
+	       children: (setChildrenById (tag.children, targetId, children)
+			  .filter (t => t.category !== 'meme' || t.hasChildren)) }
     }))
 
 
-const materialPath = (
-    tagId: number,
-    materialFilter: MaterialFilter,
-): string =>
-    `/materials?tag_id=${ tagId }&include_descendants=1&group_by=parent_tag`
-    + `&material_filter=${ materialFilter }`
-
-
-const sidebarTagToTag = (tag: MaterialSidebarTag): Tag => ({
-    id:             tag.id,
-    name:           tag.name,
-    category:       tag.category,
-    deprecatedAt:   tag.deprecated ? '' : null,
-    aliases:        [],
-    parents:        [],
-    postCount:      0,
-    createdAt:      '',
-    updatedAt:      '',
-    hasWiki:        false,
-    materialId:     null,
-    hasDeerjikists: false,
-    matchedAlias:   null })
-
-
-const tagSelectionShellClass = (selected: boolean): string =>
-    cn (selected
-	? ['rounded-md border border-sky-500 bg-sky-50 px-2 py-1 text-sky-700',
-	   'dark:border-sky-400 dark:bg-sky-950 dark:text-sky-100']
-	: 'px-2 py-1')
-
-
-const updateMaterialFilterQuery = (
-    pathname: string,
-    locationSearch: string,
-    navigate: ReturnType<typeof useNavigate>,
-    materialFilter: MaterialFilter,
-) => {
-  const qs = new URLSearchParams (locationSearch)
-  qs.set ('material_filter', materialFilter)
-  navigate (`${ pathname }${ qs.toString () ? `?${ qs.toString () }` : '' }`)
-}
-
-
-const MaterialFilterButtons: FC<{ materialFilter: MaterialFilter
-				  onChange:       (materialFilter: MaterialFilter) => void }> = (
-    { materialFilter, onChange },
-) => (
-    <div className="flex flex-wrap gap-2 justify-end md:justify-start flex-center">
-      <label className="my-auto text-sm font-bold">素材：</label>
-      {FILTERS.map (value => (
-	  <button
-	      key={value}
-	      type="button"
-	      onClick={() => onChange (value)}
-	      className={cn (
-		  'rounded-full border px-3 py-1 text-sm',
-		  (materialFilter === value
-		   ? ['border-sky-500 bg-sky-50 text-sky-700 dark:border-sky-400',
-		      'dark:bg-sky-950 dark:text-sky-100']
-		   : ['border-neutral-300 bg-white text-neutral-700 dark:border-stone-700',
-		      'dark:bg-stone-900 dark:text-stone-200']))}>
-	    {FILTER_LABELS[value]}
-	  </button>))}
-    </div>)
-
-
-const MaterialTreeNode: FC<{
-    materialFilter: MaterialFilter
-    selectedTagId:  number | null
-    nestLevel?:     number
-    onChildren:     (tagId: number, children: MaterialSidebarTag[]) => void
-    openTags:       Record<number, boolean>
-    setOpenTags:    Dispatch<SetStateAction<Record<number, boolean>>>
-    tag:            MaterialSidebarTag
-}> = ({ materialFilter, nestLevel = 0, onChildren, openTags, selectedTagId,
-	 setOpenTags, tag }) => {
-  const open = Boolean (openTags[tag.id])
-  const { data } = useQuery ({
-      queryKey: materialsKeys.tree ({ parentId: tag.id, materialFilter }),
-      queryFn:	() => fetchMaterialTagTree ({ parentId: tag.id, materialFilter }),
-      enabled:	open && tag.hasChildren && tag.children.length === 0})
+const MaterialSidebar: FC = () => {
+  const [tags, setTags] = useState<TagWithDepth[]> ([])
+  const [openTags, setOpenTags] = useState<Record<number, boolean>> ({ })
+  const [tagFetchedFlags, setTagFetchedFlags] = useState<Record<number, boolean>> ({ })
 
   useEffect (() => {
-    if (open && data && tag.children.length === 0)
-      onChildren (tag.id, data)
-  }, [data, onChildren, open, tag.children.length, tag.id])
+    void (async () => {
+      setTags ((await apiGet<TagWithDepth[]> ('/tags/with-depth'))
+	       .filter (t => t.category !== 'meme' || t.hasChildren))
+    }) ()
+  }, [])
 
-  return (
-      <>
-	<li>
-	  <div className="flex flex-center">
-	    <div className="flex-none w-4 my-auto">
-	      {tag.hasChildren && (
-		  <button
-		      type="button"
-		      onClick={() => setOpenTags (prev => ({ ...prev, [tag.id]: !prev[tag.id] }))}
-		      className="text-neutral-500 dark:text-stone-400">
-		    {open ? <>&minus;</> : '+'}
-		  </button>)}
-	    </div>
-	    <div className="min-w-0 flex-1 my-auto">
-	      <div className={cn (tagSelectionShellClass (selectedTagId === tag.id),
-				  'min-w-0 truncate')}>
-		<TagLink
-		    tag={sidebarTagToTag (tag)}
-		    nestLevel={nestLevel}
-		    title={tag.name}
-		    withCount={false}
-		    withWiki={false}
-		    to={materialPath (tag.id, materialFilter)}/>
-	      </div>
-	    </div>
-	  </div>
-	</li>
-	{open && tag.children.length > 0 && (
-	    <ul>
-	      {tag.children.map (child => (
-		  <MaterialTreeNode
-		      key={child.id}
-		      tag={child}
-		      nestLevel={nestLevel + 1}
-		      materialFilter={materialFilter}
-		      selectedTagId={selectedTagId}
-		      openTags={openTags}
-		      setOpenTags={setOpenTags}
-		      onChildren={onChildren}/>))}
-	    </ul>)}
-      </>)
-}
-
-
-const MobileMaterialTreeNode: FC<{ depth?: number
-				   availableInlineSizePx?: number | null
-				   materialFilter: MaterialFilter
-				   selectedTagId: number | null
-				   onChildren: (tagId: number, children: MaterialSidebarTag[]) =>
-						   void
-				   openTags: Record<number, boolean>
-				   setOpenTags: Dispatch<SetStateAction<Record<number, boolean>>>
-				   tag: MaterialSidebarTag }> = (
-    {
-      depth = 0,
-      availableInlineSizePx = null,
-      materialFilter,
-      onChildren,
-      openTags,
-      selectedTagId,
-      setOpenTags,
-      tag,
-    },
-) => {
-  const open = Boolean (openTags[tag.id])
-  const tagColumnRef = useRef<HTMLDivElement | null> (null)
-  const chipRef = useRef<HTMLDivElement | null> (null)
-  const buttonRef = useRef<HTMLButtonElement | null> (null)
-  const expansionSlotRef = useRef<HTMLDivElement | null> (null)
-  const expansionBorderRef = useRef<HTMLDivElement | null> (null)
-  const [tagChipInlineSizePx, setTagChipInlineSizePx] = useState<number | null> (null)
-  const [tagLinkInlineSizePx, setTagLinkInlineSizePx] = useState<number | null> (null)
-  const [childAvailableInlineSizePx, setChildAvailableInlineSizePx] = useState<number | null> (null)
-  const { data } = useQuery ({
-      queryKey: materialsKeys.tree ({ parentId: tag.id, materialFilter }),
-      queryFn:  () => fetchMaterialTagTree ({ parentId: tag.id, materialFilter }),
-      enabled:  open && tag.hasChildren && tag.children.length === 0})
-
-  useEffect (() => {
-    if (open && data && tag.children.length === 0)
-      onChildren (tag.id, data)
-  }, [data, onChildren, open, tag.children.length, tag.id])
-
-  useEffect (() => {
-    const tagColumn = tagColumnRef.current
-    const chip = chipRef.current
-    if (!(tagColumn) || !(chip))
-      return
-
-    const updateTagInlineSize = () => {
-      const buttonHeight = buttonRef.current?.offsetHeight ?? 0
-      const gap = tag.hasChildren ? px (window.getComputedStyle (tagColumn).rowGap) : 0
-      const columnHeight =
-	  availableInlineSizePx == null
-	  ? tagColumn.clientHeight
-	  : Math.min (tagColumn.clientHeight, availableInlineSizePx)
-      const nextChipInlineSize = Math.max (24, columnHeight - buttonHeight - gap)
-      const nextLinkInlineSize = Math.max (
-	  16,
-	  nextChipInlineSize - verticalChrome (chip),
-      )
-
-      setTagChipInlineSizePx (prev => prev === nextChipInlineSize ? prev : nextChipInlineSize)
-      setTagLinkInlineSizePx (prev => prev === nextLinkInlineSize ? prev : nextLinkInlineSize)
-    }
-
-    updateTagInlineSize ()
-
-    const resizeObserver = new ResizeObserver (() => {
-      updateTagInlineSize ()
-    })
-
-    resizeObserver.observe (tagColumn)
-    resizeObserver.observe (chip)
-
-    if (buttonRef.current)
-      resizeObserver.observe (buttonRef.current)
-
-    return () => {
-      resizeObserver.disconnect ()
-    }
-  }, [availableInlineSizePx, open, tag.hasChildren, tag.children.length])
-
-  useEffect (() => {
-    const expansionSlot = expansionSlotRef.current
-    const expansionBorder = expansionBorderRef.current
-    if (!(expansionSlot) || !(expansionBorder))
-      return
-
-    const updateChildInlineSize = () => {
-      const base =
-	  availableInlineSizePx == null
-	  ? expansionSlot.clientHeight
-	  : availableInlineSizePx
-      const chrome = verticalChrome (expansionSlot) + verticalChrome (expansionBorder)
-      const nextInlineSize = Math.max (24, base - chrome)
-      setChildAvailableInlineSizePx (prev => prev === nextInlineSize ? prev : nextInlineSize)
-    }
-
-    updateChildInlineSize ()
-
-    const resizeObserver = new ResizeObserver (() => {
-      updateChildInlineSize ()
-    })
-
-    resizeObserver.observe (expansionSlot)
-    resizeObserver.observe (expansionBorder)
-
-    return () => {
-      resizeObserver.disconnect ()
-    }
-  }, [availableInlineSizePx, open, tag.children.length])
-
-  return (
-      <div className="flex h-full min-h-0 max-h-full flex-row-reverse items-start gap-2
-		      overflow-hidden">
-	<div
-	    ref={tagColumnRef}
-	    className="flex h-full min-h-0 max-h-full flex-col items-center gap-1
-		       overflow-hidden">
-	  <div
-	      ref={chipRef}
-	      className={cn (
-		  tagSelectionShellClass (selectedTagId === tag.id),
-		  'box-border rounded-xl border px-3 py-2 text-sm shadow-sm',
-		  'min-h-0 overflow-hidden [max-inline-size:var(--tag-chip-inline-size)]',
-		  '[max-height:var(--tag-chip-inline-size)]',
-	      )}
-	      style={{
-		writingMode: 'vertical-rl',
-		'--tag-chip-inline-size': (
-		    tagChipInlineSizePx == null
-		    ? undefined
-		    : `${ tagChipInlineSizePx }px`),
-		'--tag-link-inline-size': (
-		    tagLinkInlineSizePx == null
-		    ? undefined
-		    : `${ tagLinkInlineSizePx }px`),
-	      } as CSSProperties}>
-	    <TagLink
-		tag={sidebarTagToTag (tag)}
-		title={tag.name}
-		truncateOnMobile
-		withCount={false}
-		withWiki={false}
-		to={materialPath (tag.id, materialFilter)}
-		className="block overflow-hidden text-ellipsis whitespace-nowrap
-			   [max-inline-size:var(--tag-link-inline-size)]
-			   [max-height:var(--tag-link-inline-size)]
-			   [&_.tag-marquee]:block
-			   [&_.tag-marquee]:h-full
-			   [&_.tag-marquee]:overflow-hidden
-			   [&_.tag-marquee__static]:h-full
-			   [&_.tag-marquee__static]:overflow-hidden
-			   [&_.tag-marquee__static]:text-ellipsis
-			   [&_.tag-marquee__static]:[text-overflow:ellipsis]"/>
-	  </div>
-	  {tag.hasChildren && (
-	      <button
-		  ref={buttonRef}
-		  type="button"
-		  onClick={() => setOpenTags (prev => ({ ...prev, [tag.id]: !prev[tag.id] }))}
-		  className="flex-none rounded-full border border-stone-300 bg-white
-			     px-2 py-0.5 text-sm text-stone-700 dark:border-stone-700
-			     dark:bg-stone-900 dark:text-stone-100">
-		{open ? <>&minus;</> : '+'}
-	      </button>)}
-	</div>
-	{open && tag.children.length > 0 && (
-	    <div
-		ref={expansionSlotRef}
-		className={cn (
-		    'h-full min-h-0 max-h-full overflow-hidden box-border',
-		    depth === 0 ? 'pt-5' : 'pt-3')}>
-	      <div
-		  ref={expansionBorderRef}
-		  className="relative max-h-full overflow-hidden rounded-2xl border border-stone-200
-			     bg-stone-100/70 py-2 pl-2 pr-2 text-stone-900
-			     dark:border-stone-700 dark:bg-stone-900/70 dark:text-stone-100">
-		<div className="flex h-full min-h-0 max-h-full flex-row-reverse items-start gap-2
-				overflow-hidden">
-		  <span
-		      aria-hidden="true"
-		      className="absolute -right-3 top-4 h-px w-3 bg-stone-300 dark:bg-stone-600"/>
-		  {tag.children.map (child => (
-		      <div
-			  key={child.id}
-			  className="relative h-full min-h-0 max-h-full overflow-hidden">
-			<MobileMaterialTreeNode
-			    tag={child}
-			    depth={depth + 1}
-			    availableInlineSizePx={childAvailableInlineSizePx}
-			    materialFilter={materialFilter}
-			    selectedTagId={selectedTagId}
-			    openTags={openTags}
-			    setOpenTags={setOpenTags}
-			    onChildren={onChildren}/>
-		      </div>))}
+  const renderTags = (ts: TagWithDepth[], nestLevel = 0): ReactNode => (
+      ts.map (t => (
+	  <Fragment key={t.id}>
+	    <li>
+	      <div className="flex">
+		<div className="flex-none w-4">
+		  {t.hasChildren && (
+		      <a
+			  href="#"
+			  onClick={async e => {
+			    e.preventDefault ()
+			    if (!(tagFetchedFlags[t.id]))
+			      {
+				try
+				{
+				  const data =
+				      await apiGet<TagWithDepth[]> (
+					  '/tags/with-depth', { params: { parent: String (t.id) } })
+				  setTags (prev => setChildrenById (prev, t.id, data))
+				  setTagFetchedFlags (prev => ({ ...prev, [t.id]: true }))
+				}
+				catch
+				{
+				  ;
+				}
+			      }
+			    setOpenTags (prev => ({ ...prev, [t.id]: !(prev[t.id]) }))
+			  }}>
+			{openTags[t.id] ? <>&minus;</> : '+'}
+		      </a>)}
+		</div>
+		<div className="flex-1 truncate">
+		  <TagLink
+		      tag={t}
+		      nestLevel={nestLevel}
+		      title={t.name}
+		      withCount={false}
+		      withWiki={false}
+		      to={`/materials?tag=${ encodeURIComponent (t.name) }`}/>
 		</div>
 	      </div>
-	    </div>)}
-      </div>)
-}
-
-
-const MaterialSidebar: FC = () => {
-  const location = useLocation ()
-  const navigate = useNavigate ()
-  const qs = new URLSearchParams (location.search)
-  const materialFilter = parseMaterialFilter (qs.get ('material_filter'), 'any')
-  const selectedTagId = Number (qs.get ('tag_id') ?? 0) || null
-
-  const [desktopTags, setDesktopTags] = useState<MaterialSidebarTag[]> ([])
-  const [openTags, setOpenTags] = useState<Record<number, boolean>> ({ })
-  const mobileRailRef = useRef<HTMLDivElement | null> (null)
-  const [mobileAvailableInlineSizePx, setMobileAvailableInlineSizePx] =
-      useState<number | null> (null)
-
-  const { data: rootTags = [], isLoading, isError } = useQuery ({
-      queryKey: materialsKeys.tree ({ parentId: null, materialFilter }),
-      queryFn:  () => fetchMaterialTagTree ({ parentId: null, materialFilter })})
-
-  useEffect (() => {
-    setDesktopTags (rootTags)
-  }, [rootTags])
-
-  useEffect (() => {
-    const el = mobileRailRef.current
-    if (!(el))
-      return
-
-    requestAnimationFrame (() => {
-      el.scrollLeft = el.scrollWidth
-    })
-  }, [rootTags, materialFilter])
-
-  useEffect (() => {
-    const el = mobileRailRef.current
-    if (!(el))
-      return
-
-    const updateAvailableInlineSize = () => {
-      const nextInlineSize = Math.max (24, el.clientHeight)
-      setMobileAvailableInlineSizePx (prev => prev === nextInlineSize ? prev : nextInlineSize)
-    }
-
-    updateAvailableInlineSize ()
-
-    const resizeObserver = new ResizeObserver (() => {
-      updateAvailableInlineSize ()
-    })
-
-    resizeObserver.observe (el)
-
-    return () => {
-      resizeObserver.disconnect ()
-    }
-  }, [rootTags, materialFilter])
-
-  const visibleRootTags = desktopTags.length > 0 ? desktopTags : rootTags
-
-  const setChildren = (tagId: number, children: MaterialSidebarTag[]) => {
-    setDesktopTags (prev => {
-      const base = prev.length > 0 ? prev : rootTags
-      return setChildrenById (base, tagId, children)
-    })
-  }
-
-  const handleFilterChange = (value: MaterialFilter) => {
-    setDesktopTags ([])
-    setOpenTags ({ })
-    updateMaterialFilterQuery (location.pathname, location.search, navigate, value)
-  }
-
-  const renderDesktopTree = (tags: MaterialSidebarTag[]): ReactNode => (
-      tags.map (tag => (
-	  <MaterialTreeNode
-	      key={tag.id}
-	      tag={tag}
-	      materialFilter={materialFilter}
-	      selectedTagId={selectedTagId}
-	      openTags={openTags}
-	      setOpenTags={setOpenTags}
-	      onChildren={setChildren}/>)))
+	    </li>
+	    {openTags[t.id] && renderTags (t.children, nestLevel + 1)}
+	  </Fragment>)))
 
   return (
-      <>
-	<div className="border-b bg-stone-50 p-3 dark:border-stone-700 dark:bg-stone-950
-			dark:text-stone-100 md:hidden flex h-[25dvh] min-h-0 flex-col
-			overflow-hidden">
-	  <MaterialFilterButtons
-	      materialFilter={materialFilter}
-	      onChange={handleFilterChange}/>
-	  <div
-	      ref={mobileRailRef}
-	      className="mt-3 min-h-0 flex-1 overflow-x-auto overflow-y-hidden">
-	    <div className="flex min-w-max flex-row-reverse items-start gap-3 pb-1 h-full
-			    min-h-0 max-h-full">
-	      {visibleRootTags.map (tag => (
-		  <MobileMaterialTreeNode
-		      key={tag.id}
-		      tag={tag}
-		      availableInlineSizePx={mobileAvailableInlineSizePx}
-		      materialFilter={materialFilter}
-		      selectedTagId={selectedTagId}
-		      openTags={openTags}
-		      setOpenTags={setOpenTags}
-		      onChildren={setChildren}/>))}
-	    </div>
-	  </div>
-	</div>
-
-	<div className="hidden md:block">
-	  <SidebarComponent>
-	    <div className="space-y-4">
-	      <MaterialFilterButtons
-		  materialFilter={materialFilter}
-		  onChange={handleFilterChange}/>
-	      {isLoading && (
-		  <p className="text-sm text-neutral-500 dark:text-stone-400">読込中……</p>)}
-	      {isError && (
-		  <p className="text-sm text-red-600 dark:text-red-300">
-		    タグ一覧の取得に失敗しました．
-		  </p>)}
-	      {(!isLoading && !isError) && (
-		  <ul>
-		    {renderDesktopTree (visibleRootTags)}
-		  </ul>)}
-	    </div>
-	  </SidebarComponent>
-	</div>
-      </>)
+      <SidebarComponent>
+	<ul>
+	  {renderTags (tags)}
+	</ul>
+      </SidebarComponent>)
 }
 
-
-export default MaterialSidebar
+export default MaterialSidebar

frontend/src/components/NicoViewer.tsx

@@ -107,7 +107,8 @@ export default forwardRef ((props: Props, ref: ForwardedRef<NiconicoViewerHandle
     loadCompleteTimerRef.current = setTimeout (() => {
       onError?.({
 	  eventName: 'loadCompleteTimeout',
-	  reason:    'niconico video length was not reported by embed'})
+	  reason:    'niconico video length was not reported by embed',
+      })
     }, LOAD_COMPLETE_TIMEOUT_MS)
   }, [clearLoadCompleteTimer, onError])
 

frontend/src/components/PostOriginalCreatedTimeField.tsx

@@ -19,7 +19,8 @@ const PostOriginalCreatedTimeField: FC<Props> = (
       setOriginalCreatedFrom,
       originalCreatedBefore,
       setOriginalCreatedBefore,
-      errors }: Props) => (
+      errors }: Props,
+) => (
     <FormField label="オリジナルの作成日時" messages={errors}>
       {({ describedBy, invalid }) => (
 	  <>

frontend/src/components/ResponsiveMarqueeText.tsx

@@ -1,250 +0,0 @@
-import { cn } from '@/lib/utils'
-import { useEffect, useRef, useState } from 'react'
-
-import type { FC } from 'react'
-
-type Props = {
-    text:      string
-    className?: string
-    truncateOnMobile?: boolean
-    title?:    string }
-
-const DESKTOP_MARQUEE_MEDIA =
-    '(min-width: 768px) and (hover: hover) and (pointer: fine) and (prefers-reduced-motion: no-preference)'
-const MARQUEE_START_DELAY_MS = 1600
-const MARQUEE_END_HOLD_MS = 2400
-const MARQUEE_SCROLL_PX_PER_SECOND = 43
-const MIN_MARQUEE_OVERFLOW_PX = 1
-
-
-const ResponsiveMarqueeText: FC<Props> = (
-    { text, className, truncateOnMobile = false, title },
-) => {
-  const outerRef = useRef<HTMLSpanElement | null> (null)
-  const staticRef = useRef<HTMLSpanElement | null> (null)
-  const animatedRef = useRef<HTMLSpanElement | null> (null)
-  const animationRef = useRef<Animation | null> (null)
-  const timeoutRef = useRef<number | null> (null)
-  const rafRef = useRef<number | null> (null)
-  const [overflowPx, setOverflowPx] = useState (0)
-  const [desktopMarqueeEnabled, setDesktopMarqueeEnabled] = useState (false)
-  const [active, setActive] = useState (false)
-  const [marqueeVisible, setMarqueeVisible] = useState (false)
-
-  useEffect (() => {
-    const outer = outerRef.current
-    const inner = staticRef.current
-
-    if (!(outer) || !(inner))
-      return
-
-    const measure = () => {
-      const nextOverflow = Math.max (0, Math.ceil (inner.scrollWidth - outer.clientWidth))
-      setOverflowPx (prev => Math.abs (prev - nextOverflow) <= 1 ? prev : nextOverflow)
-    }
-
-    measure ()
-
-    const resizeObserver =
-	typeof ResizeObserver === 'undefined'
-	? null
-	: new ResizeObserver (() => {
-	    measure ()
-	  })
-
-    resizeObserver?.observe (outer)
-    resizeObserver?.observe (inner)
-    addEventListener ('resize', measure)
-
-    return () => {
-      resizeObserver?.disconnect ()
-      removeEventListener ('resize', measure)
-    }
-  }, [text])
-
-  useEffect (() => {
-    if (typeof window === 'undefined' || typeof window.matchMedia !== 'function')
-      return
-
-    const media = window.matchMedia (DESKTOP_MARQUEE_MEDIA)
-    const update = () => {
-      setDesktopMarqueeEnabled (media.matches)
-    }
-
-    update ()
-    media.addEventListener ('change', update)
-
-    return () => {
-      media.removeEventListener ('change', update)
-    }
-  }, [])
-
-  useEffect (() => {
-    const clearScheduled = () => {
-      if (timeoutRef.current != null)
-        {
-          clearTimeout (timeoutRef.current)
-          timeoutRef.current = null
-        }
-      if (rafRef.current != null)
-        {
-          cancelAnimationFrame (rafRef.current)
-          rafRef.current = null
-        }
-      animationRef.current?.cancel ()
-      animationRef.current = null
-    }
-
-    const animated = animatedRef.current
-    const canMarquee = (
-        active
-        && desktopMarqueeEnabled
-        && overflowPx >= MIN_MARQUEE_OVERFLOW_PX
-        && animated != null)
-
-    const resetAnimated = () => {
-      const node = animatedRef.current
-
-      animationRef.current?.cancel ()
-      animationRef.current = null
-      node?.getAnimations?.().forEach (animation => {
-        animation.cancel ()
-      })
-
-      if (!(node))
-        return
-
-      node.style.transition = 'none'
-      node.style.transform = 'translateX(0)'
-    }
-
-    if (!canMarquee)
-      {
-        clearScheduled ()
-        resetAnimated ()
-        setMarqueeVisible (false)
-        return
-      }
-
-    let cancelled = false
-
-    const sleep = (ms: number) =>
-	new Promise<void> (resolve => {
-	  timeoutRef.current = window.setTimeout (() => {
-	    timeoutRef.current = null
-	    resolve ()
-	  }, ms)
-	})
-
-    const runLoop = async () => {
-      while (!cancelled)
-        {
-          resetAnimated ()
-          setMarqueeVisible (true)
-
-          await sleep (MARQUEE_START_DELAY_MS)
-          if (cancelled || !(animatedRef.current))
-            break
-
-          const moveDurationMs =
-	      overflowPx / MARQUEE_SCROLL_PX_PER_SECOND * 1000
-          const node = animatedRef.current
-
-          if (typeof node.animate === 'function')
-            {
-              const animation = node.animate (
-		  [
-		    { transform: 'translateX(0)' },
-		    { transform: `translateX(-${ overflowPx }px)` },
-		  ],
-		  { duration: moveDurationMs, easing: 'linear', fill: 'forwards' })
-              animationRef.current = animation
-              try
-              {
-                await animation.finished
-              }
-              catch
-              {
-                break
-              }
-
-              node.style.transform = `translateX(-${ overflowPx }px)`
-              animation.cancel ()
-              if (animationRef.current === animation)
-                animationRef.current = null
-            }
-          else
-            {
-              node.style.transition = `transform ${ moveDurationMs }ms linear`
-              await new Promise<void> (resolve => {
-                rafRef.current = requestAnimationFrame (() => {
-                  rafRef.current = null
-                  node.style.transform = `translateX(-${ overflowPx }px)`
-                  resolve ()
-                })
-              })
-              await sleep (moveDurationMs)
-              node.style.transition = 'none'
-              node.style.transform = `translateX(-${ overflowPx }px)`
-            }
-
-          if (cancelled)
-            break
-
-          await sleep (MARQUEE_END_HOLD_MS)
-          if (cancelled)
-            break
-
-          resetAnimated ()
-        }
-    }
-
-    void runLoop ()
-
-    return () => {
-      cancelled = true
-      clearScheduled ()
-      resetAnimated ()
-      setMarqueeVisible (false)
-    }
-  }, [active, desktopMarqueeEnabled, overflowPx, text])
-
-  return (
-      <span
-	  ref={outerRef}
-	  title={title ?? text}
-	  onMouseEnter={() => setActive (true)}
-	  onMouseLeave={() => setActive (false)}
-	  onFocus={() => setActive (true)}
-	  onBlur={() => setActive (false)}
-	  className={cn (
-	      'tag-marquee inline-block max-w-full min-w-0 align-bottom',
-	      (truncateOnMobile
-	       ? 'overflow-hidden text-ellipsis whitespace-nowrap'
-	       : 'whitespace-normal [overflow-wrap:anywhere]'),
-	      'md:overflow-hidden md:whitespace-nowrap',
-	      className)}>
-	<span
-	    ref={staticRef}
-	    className={cn (
-		'tag-marquee__static block max-w-full',
-		(truncateOnMobile
-		 ? 'overflow-hidden text-ellipsis whitespace-nowrap'
-		 : 'whitespace-normal [overflow-wrap:anywhere]'),
-		'md:overflow-hidden md:text-ellipsis md:whitespace-nowrap',
-		marqueeVisible && 'md:opacity-0')}>
-	  {text}
-	</span>
-	{overflowPx >= MIN_MARQUEE_OVERFLOW_PX && (
-	    <span
-		ref={animatedRef}
-		aria-hidden="true"
-		className={cn (
-		    'tag-marquee__animated hidden md:block',
-		    marqueeVisible ? 'md:opacity-100' : 'md:opacity-0')}>
-	      {text}
-	    </span>)}
-      </span>)
-}
-
-export default ResponsiveMarqueeText

frontend/src/components/TagDetailSidebar.tsx

@@ -37,7 +37,8 @@ const renderTagTree = (
     path:             string,
     suppressClickRef: MutableRefObject<boolean>,
     parentTagId?:     number,
-    sp?:              boolean): ReactNode[] => {
+    sp?:              boolean,
+): ReactNode[] => {
   const key = `${ path }-${ tag.id }`
 
   const self = (
@@ -63,7 +64,8 @@ const renderTagTree = (
 
 const isDescendant = (
     root:     Tag,
-    targetId: number): boolean => {
+    targetId: number,
+): boolean => {
   if (!(root.children))
     return false
 
@@ -81,7 +83,8 @@ const isDescendant = (
 
 const findTag = (
     byCat:  TagByCategory,
-    id:     number): Tag | undefined => {
+    id:     number,
+): Tag | undefined => {
   const walk = (nodes: Tag[]): Tag | undefined => {
     for (const t of nodes)
       {
@@ -127,7 +130,8 @@ const buildTagByCategory = (post: Post): TagByCategory => {
 
 const changeCategory = async (
     tagId:    number,
-    category: Category): Promise<void> => {
+    category: Category,
+): Promise<void> => {
   await apiPatch (`/tags/${ tagId }`, { category })
 }
 
@@ -290,7 +294,8 @@ const TagDetailSidebar: FC<Props> = ({ post, sp }) => {
 	      addEventListener ('click', e => {
 		e.preventDefault ()
 		e.stopPropagation ()
-		suppressClickRef.current = false}, { capture: true, once: true })
+		suppressClickRef.current = false
+	      }, { capture: true, once: true })
 	    }}
 	    onDragCancel={() => {
 	      setActiveTagId (null)

frontend/src/components/TagLink.test.tsx

@@ -18,21 +18,6 @@ describe ('TagLink', () => {
     expect (screen.getByText ('4')).toBeInTheDocument ()
   })
 
-  it ('does not append deprecated state to the rendered tag name', () => {
-    renderWithProviders (
-        <TagLink
-            tag={buildTag ({
-                name:         '旧タグ',
-                deprecatedAt: '2026-06-01T00:00:00.000Z',
-            })}
-            withWiki={false}
-            withCount={false}/>,
-    )
-
-    expect (screen.getByRole ('link', { name: '旧タグ' })).toBeInTheDocument ()
-    expect (screen.queryByText ('（廃止）')).not.toBeInTheDocument ()
-  })
-
   it ('links wiki markers to the correct detail route', () => {
     renderWithProviders (
         <TagLink tag={buildTag ({ hasWiki: true, name: 'a/b' })}/>,

frontend/src/components/TagLink.tsx

@@ -1,5 +1,4 @@
 import PrefetchLink from '@/components/PrefetchLink'
-import ResponsiveMarqueeText from '@/components/ResponsiveMarqueeText'
 import { LIGHT_COLOUR_SHADE, DARK_COLOUR_SHADE, TAG_COLOUR } from '@/consts'
 import { cn } from '@/lib/utils'
 
@@ -10,7 +9,6 @@ import type { Tag } from '@/types'
 type CommonProps = { 
     tag:        Tag
     nestLevel?: number
-    truncateOnMobile?: boolean
     withWiki?:  boolean
     withCount?: boolean }
 
@@ -30,14 +28,11 @@ type Props =
 
 
 const TagLink: FC<Props> = ({ tag,
-			      nestLevel = 0,
-			      linkFlg   = true,
-			      truncateOnMobile = false,
-			      withWiki  = true,
-			      withCount = true,
-			      className,
-			      title,
-			      ...props }) => {
+		   nestLevel = 0,
+		   linkFlg   = true,
+		   withWiki  = true,
+		   withCount = true,
+		   ...props }) => {
   const spanClass = cn (
       `text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE }`,
       `dark:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE }`)
@@ -45,18 +40,11 @@ const TagLink: FC<Props> = ({ tag,
       spanClass,
       `hover:text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE - 200 }`,
       `dark:hover:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE - 200 }`)
-  const textClass = 'group min-w-0 max-w-full overflow-hidden align-bottom'
-  const rootClass =
-      'inline-flex min-w-0 max-w-full flex-nowrap items-stretch align-baseline gap-x-1 md:items-baseline'
-  const markerWrapClass = 'shrink-0 self-start md:self-auto'
-  const countClass = 'shrink-0 self-end md:self-auto'
-  const textTitle = title
-      ?? (tag.matchedAlias == null ? tag.name : `${ tag.matchedAlias } → ${ tag.name }`)
 
   return (
-      <span className={rootClass}>
+      <>
 	{(linkFlg && withWiki) && (
-	    <span className={markerWrapClass}>
+	    <span className="mr-1">
 	      {(tag.materialId != null || tag.hasWiki || tag.hasDeerjikists)
 	       ? (
 		  tag.materialId == null && !(tag.hasDeerjikists)
@@ -111,48 +99,33 @@ const TagLink: FC<Props> = ({ tag,
 	    </span>)}
 	{nestLevel > 0 && (
 	    <span
-		className="ml-1 mr-1 shrink-0"
+		className="ml-1 mr-1"
 		style={{ paddingLeft: `${ (nestLevel - 1) }rem` }}>
 	      ↳
 	    </span>)}
 	{tag.matchedAlias != null && (
 	    <>
-	      <span
-		  title={textTitle}
-		  className={cn (spanClass, textClass, className)}
-		  {...props}>
-		<ResponsiveMarqueeText
-		    text={tag.matchedAlias}
-		    title={textTitle}
-		    truncateOnMobile={truncateOnMobile}/>
+	      <span className={spanClass} {...props}>
+		{tag.matchedAlias}
 	      </span>
-	      <span className="shrink-0"> → </span>
+	      <> → </>
 	    </>)}
 	{linkFlg
 	 ? (
 	    <PrefetchLink
 		to={`/posts?${ (new URLSearchParams ({ tags: tag.name })).toString () }`}
-		title={textTitle}
-		className={cn (linkClass, textClass, className)}
+		className={linkClass}
 		{...props}>
-	      <ResponsiveMarqueeText
-		  text={tag.name}
-		  title={textTitle}
-		  truncateOnMobile={truncateOnMobile}/>
+	      {tag.name}
 	    </PrefetchLink>)
 	 : (
-	    <span
-		  title={textTitle}
-		  className={cn (spanClass, textClass, className)}
+	    <span className={spanClass}
 		  {...props}>
-	      <ResponsiveMarqueeText
-		  text={tag.name}
-		  title={textTitle}
-		  truncateOnMobile={truncateOnMobile}/>
+	      {tag.name}
 	    </span>)}
 	{withCount && (
-	    <span className={countClass}>{tag.postCount}</span>)}
-      </span>)
+	    <span className="ml-1">{tag.postCount}</span>)}
+      </>)
 }
 
-export default TagLink
+export default TagLink

frontend/src/components/TagSearchBox.tsx

@@ -20,14 +20,12 @@ const TagSearchBox: FC<Props> = ({ suggestions, activeIndex, onSelect }) => {
 		     rounded shadow">
 	{suggestions.map ((tag, i) => (
 	    <li key={tag.id}
-		className={cn ('min-w-0 overflow-hidden px-3 py-2 cursor-pointer hover:bg-gray-300 dark:hover:bg-gray-700',
+		className={cn ('px-3 py-2 cursor-pointer hover:bg-gray-300 dark:hover:bg-gray-700', 
 			       i === activeIndex && 'bg-gray-300 dark:bg-gray-700')}
 		onMouseDown={() => onSelect (tag)}>
-	      <div className="flex min-w-0 max-w-full items-baseline overflow-hidden">
-		<TagLink tag={tag} linkFlg={false} withWiki={false}/>
-	      </div>
+	      <TagLink tag={tag} linkFlg={false} withWiki={false}/>
 	    </li>))}
       </ul>)
 }
 
-export default TagSearchBox
+export default TagSearchBox

frontend/src/components/TagSidebar.tsx

@@ -64,9 +64,8 @@ const TagSidebar: FC<Props> = ({ posts, onClick }) => {
 	<ul>
 	  {CATEGORIES.flatMap (cat => cat in tags ? (
 	      tags[cat].map (tag => (
-		  <li key={tag.id} className="mb-1 min-w-0 max-w-full overflow-hidden">
+		  <li key={tag.id} className="mb-1">
 		    <motion.div
-			className="flex min-w-0 max-w-full items-baseline overflow-hidden"
 			transition={{ layout: { duration: .2, ease: 'easeOut' } }}
 			layoutId={`tag-${ tag.id }`}>
 		      <TagLink tag={tag} onClick={onClick}/>
@@ -129,4 +128,4 @@ const TagSidebar: FC<Props> = ({ posts, onClick }) => {
       </SidebarComponent>)
 }
 
-export default TagSidebar
+export default TagSidebar

frontend/src/components/TopNav.tsx

@@ -7,36 +7,30 @@ import Separator from '@/components/MenuSeparator'
 import PrefetchLink from '@/components/PrefetchLink'
 import TopNavUser from '@/components/TopNavUser'
 import { WikiIdBus } from '@/lib/eventBus/WikiIdBus'
-import { materialsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
+import { tagsKeys, wikiKeys } from '@/lib/queryKeys'
 import { fetchTag, fetchTagByName } from '@/lib/tags'
-import { fetchMaterial } from '@/lib/materials'
 import { cn } from '@/lib/utils'
 import { fetchWikiPage } from '@/lib/wiki'
 
 import type { FC, MouseEvent } from 'react'
 
-import type { Material, Menu, MenuVisibleItem, Tag, User } from '@/types'
+import type { Menu, MenuVisibleItem, Tag, User } from '@/types'
 
 type Props = { user: User | null }
 
 
-export const menuOutline = (
-    { tag, material, wikiId, user, pathName }: {
-	tag?: Tag | null
-	material?: Material | null
-	wikiId: number | null
-	user: User | null,
-	pathName: string },
-): Menu => {
-  const postCount = tag?.postCount ?? material?.tag?.postCount ?? 0
+export const menuOutline = ({ tag, wikiId, user, pathName }: { 
+    tag?: Tag | null
+    wikiId: number | null
+    user: User | null,
+    pathName: string }): Menu => {
+  const postCount = tag?.postCount ?? 0
 
   const wikiPageFlg = Boolean (/^\/wiki\/(?!new|changes)[^/]+/.test (pathName) && wikiId)
   const wikiTitle = pathName.split ('/')[2] ?? ''
 
   const tagFlg = /^\/tags\/\d+/.test (pathName)
 
-  const materialFlg = /^\/materials\/\d+/.test (pathName)
-
   return [
       { name: '広場', to: '/posts', subMenu: [
 	  { name: '一覧', to: '/posts' },
@@ -55,18 +49,12 @@ export const menuOutline = (
 	    visible: tagFlg },
 	  { name: '履歴', to: `/tags/changes?id=${ tag?.id }`,
 	    visible: tagFlg && tag?.category !== 'nico' }] },
-      { name: '素材', to: '/materials', visible: true, subMenu: [
+      { name: '素材', to: '/materials', visible: false, subMenu: [
 	  { name: '一覧', to: '/materials' },
+	  { name: '検索', to: '/materials/search', visible: false }, 
 	  { name: '追加', to: '/materials/new' },
-	  { name: '抑止', to: '/materials/suppressions' },
-	  { name: '全体履歴', to: '/materials/changes' },
-	  { name: 'ヘルプ', to: '/wiki/ヘルプ:素材管理' },
-	  { component: <Separator/>, visible: materialFlg },
-	  { name: `広場 (${ postCount || 0 })`,
-	    to: `/posts?tags=${ encodeURIComponent (material?.tag?.name ?? '') }`,
-	    visible: materialFlg && Boolean (material?.tag) },
-	  { name: '履歴', to: `/materials/changes?material_id=${ material?.id }`,
-	    visible: materialFlg }] },
+	  { name: '全体履歴', to: '/materials/changes', visible: false },
+	  { name: 'ヘルプ', to: '/wiki/ヘルプ:素材集' }] },
       { name: 'Wiki', to: '/wiki/ヘルプ:ホーム', base: '/wiki', subMenu: [
 	  { name: '検索', to: '/wiki' },
 	  { name: '新規', to: '/wiki/new' },
@@ -131,23 +119,15 @@ const TopNav: FC<Props> = ({ user }) => {
       queryFn: () => fetchWikiPage (wikiIdStr, { }) })
 
   const tagFlg = /^\/tags\/\d+/.test (location.pathname)
-  const materialFlg = /^\/materials\/\d+/.test (location.pathname)
-  const effectiveTitle = (((tagFlg || materialFlg)
-			   ? location.pathname.split ('/')[2]
-			   : wikiPage?.title)
-			  ?? '')
+  const effectiveTitle = (tagFlg ? location.pathname.split ('/')[2] : wikiPage?.title) ?? ''
 
   const { data: tag } = useQuery ({
       enabled: Boolean (effectiveTitle),
       queryKey: tagsKeys.show (effectiveTitle),
       queryFn: () => (tagFlg ? fetchTag : fetchTagByName) (effectiveTitle) })
 
-  const { data: material } = useQuery ({
-      enabled: Boolean (effectiveTitle),
-      queryKey: materialsKeys.show (effectiveTitle),
-      queryFn: () => fetchMaterial (effectiveTitle) })
 
-  const menu = menuOutline ({ tag, material, wikiId, user, pathName: location.pathname })
+  const menu = menuOutline ({ tag, wikiId, user, pathName: location.pathname })
   const visibleMenu = menu.filter ((item): item is MenuVisibleItem => item.visible ?? true)
   const moreMenu = menu.filter (item =>
       !(item.visible ?? true)

frontend/src/components/common/PageTitle.tsx

@@ -1,14 +1,12 @@
 import React from 'react'
 
-import { cn } from '@/lib/utils'
-
 import type { FC } from 'react'
 
-type Props = { children: React.ReactNode; className?: string }
+type Props = { children: React.ReactNode }
 
 
-const PageTitle: FC<Props> = ({ children, className, ...rest }) => (
-    <h1 className={cn ('text-2xl font-bold mb-2', className)} {...rest}>
+const PageTitle: FC<Props> = ({ children }) => (
+    <h1 className="text-2xl font-bold mb-2">
       {children}
     </h1>)
 

frontend/src/components/common/Pagination.tsx

@@ -16,7 +16,8 @@ const range = (start: number, end: number): number[] =>
 const getPages = (
     page:         number,
     total:        number,
-    siblingCount: number): (number | '…')[] => {
+    siblingCount: number,
+): (number | '…')[] => {
   if (total <= 1)
     return [1]
 

frontend/src/components/dialogues/DialogueProvider.tsx

@@ -103,7 +103,8 @@ const DialogueProvider: FC<Props> = ({ children }) => {
       choice: options => new Promise (resolve => {
 	push ({ kind: 'choice',
 		options: options as ChoiceOptions<string>,
-		resolve: resolve as (value: string | null) => void })}) }), [push])
+		resolve: resolve as (value: string | null) => void })
+      }) }), [push])
 
   const active = queue[0]
 

frontend/src/components/ui/button.tsx

@@ -10,35 +10,41 @@ const buttonVariants = cva (
     'rounded-md text-sm font-medium transition-colors',
     'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-slate-400',
     'disabled:pointer-events-none disabled:opacity-50',
-    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0'].join (' '),
+    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
+  ].join (' '),
   {
     variants: {
       variant: {
-	default:
-	  'bg-slate-900 text-white hover:bg-slate-700 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-300',
+        default:
+          'bg-slate-900 text-white hover:bg-slate-700 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-300',
 
-	destructive:
-	  'bg-red-600 text-white hover:bg-red-700 dark:bg-red-700 dark:hover:bg-red-600',
+        destructive:
+          'bg-red-600 text-white hover:bg-red-700 dark:bg-red-700 dark:hover:bg-red-600',
 
-	outline:
-	  'border border-slate-300 bg-white text-slate-900 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100 dark:hover:bg-slate-800',
+        outline:
+          'border border-slate-300 bg-white text-slate-900 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100 dark:hover:bg-slate-800',
 
-	secondary:
-	  'bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700',
+        secondary:
+          'bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700',
 
-	ghost:
-	  'text-slate-900 hover:bg-slate-100 dark:text-slate-100 dark:hover:bg-slate-800',
+        ghost:
+          'text-slate-900 hover:bg-slate-100 dark:text-slate-100 dark:hover:bg-slate-800',
 
-	link:
-	  'text-blue-700 underline-offset-4 hover:underline dark:text-blue-300'},
+        link:
+          'text-blue-700 underline-offset-4 hover:underline dark:text-blue-300',
+      },
       size: {
-	default: 'h-10 px-4 py-2',
-	sm:      'h-9 rounded-md px-3',
-	lg:      'h-11 rounded-md px-8',
-	icon:    'h-10 w-10'}},
+        default: 'h-10 px-4 py-2',
+        sm:      'h-9 rounded-md px-3',
+        lg:      'h-11 rounded-md px-8',
+        icon:    'h-10 w-10',
+      },
+    },
     defaultVariants: {
       variant: 'default',
-      size:    'default'}})
+      size:    'default',
+    },
+  })
 
 export interface ButtonProps
   extends React.ButtonHTMLAttributes<HTMLButtonElement>,
@@ -51,11 +57,13 @@ const Button = React.forwardRef<HTMLButtonElement, ButtonProps>(
     const Comp = asChild ? Slot : "button"
     return (
       <Comp
-	className={cn(buttonVariants({ variant, size, className }))}
-	ref={ref}
-	{...props}
-      />)
-  })
+        className={cn(buttonVariants({ variant, size, className }))}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
 Button.displayName = "Button"
 
 export { Button, buttonVariants }

frontend/src/components/ui/dialog.tsx

@@ -22,9 +22,11 @@ const DialogOverlay = React.forwardRef<
     ref={ref}
     className={cn(
       "fixed inset-0 z-50 bg-black/80 data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0",
-      className)}
+      className
+    )}
     {...props}
-  />))
+  />
+))
 DialogOverlay.displayName = DialogPrimitive.Overlay.displayName
 
 const DialogContent = React.forwardRef<
@@ -60,7 +62,8 @@ const DialogContent = React.forwardRef<
 	<span className="sr-only">閉ぢる</span>
       </DialogPrimitive.Close>
     </DialogPrimitive.Content>
-  </DialogPortal>))
+  </DialogPortal>
+))
 DialogContent.displayName = DialogPrimitive.Content.displayName
 
 const DialogHeader = ({
@@ -70,9 +73,11 @@ const DialogHeader = ({
   <div
     className={cn(
       "flex flex-col space-y-1.5 text-center sm:text-left",
-      className)}
+      className
+    )}
     {...props}
-  />)
+  />
+)
 DialogHeader.displayName = "DialogHeader"
 
 const DialogFooter = ({
@@ -82,9 +87,11 @@ const DialogFooter = ({
   <div
     className={cn(
       "flex flex-col-reverse sm:flex-row sm:justify-end sm:space-x-2",
-      className)}
+      className
+    )}
     {...props}
-  />)
+  />
+)
 DialogFooter.displayName = "DialogFooter"
 
 const DialogTitle = React.forwardRef<
@@ -95,9 +102,11 @@ const DialogTitle = React.forwardRef<
     ref={ref}
     className={cn(
       "text-lg font-semibold leading-none tracking-tight",
-      className)}
+      className
+    )}
     {...props}
-  />))
+  />
+))
 DialogTitle.displayName = DialogPrimitive.Title.displayName
 
 const DialogDescription = React.forwardRef<
@@ -108,7 +117,8 @@ const DialogDescription = React.forwardRef<
     ref={ref}
     className={cn("text-sm text-muted-foreground", className)}
     {...props}
-  />))
+  />
+))
 DialogDescription.displayName = DialogPrimitive.Description.displayName
 
 export {

frontend/src/components/ui/input.tsx

@@ -1,19 +1,22 @@
-import * as React from 'react'
+import * as React from "react"
 
-import { cn } from '@/lib/utils'
+import { cn } from "@/lib/utils"
 
-const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<'input'>>(
+const Input = React.forwardRef<HTMLInputElement, React.ComponentProps<"input">>(
   ({ className, type, ...props }, ref) => {
     return (
       <input
-	type={type}
-	className={cn(
-	  'flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-base ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 md:text-sm',
-	  className)}
-	ref={ref}
-	{...props}
-      />)
-  })
-Input.displayName = 'Input'
+        type={type}
+        className={cn(
+          "flex h-10 w-full rounded-md border border-input bg-background px-3 py-2 text-base ring-offset-background file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:cursor-not-allowed disabled:opacity-50 md:text-sm",
+          className
+        )}
+        ref={ref}
+        {...props}
+      />
+    )
+  }
+)
+Input.displayName = "Input"
 
 export { Input }

frontend/src/components/ui/switch.tsx

@@ -1,9 +1,9 @@
-'use client'
+"use client"
 
-import * as React from 'react'
-import * as SwitchPrimitives from '@radix-ui/react-switch'
+import * as React from "react"
+import * as SwitchPrimitives from "@radix-ui/react-switch"
 
-import { cn } from '@/lib/utils'
+import { cn } from "@/lib/utils"
 
 const Switch = React.forwardRef<
   React.ElementRef<typeof SwitchPrimitives.Root>,
@@ -11,16 +11,19 @@ const Switch = React.forwardRef<
 >(({ className, ...props }, ref) => (
   <SwitchPrimitives.Root
     className={cn(
-      'peer inline-flex h-6 w-11 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=unchecked]:bg-input',
-      className)}
+      "peer inline-flex h-6 w-11 shrink-0 cursor-pointer items-center rounded-full border-2 border-transparent transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:ring-offset-background disabled:cursor-not-allowed disabled:opacity-50 data-[state=checked]:bg-primary data-[state=unchecked]:bg-input",
+      className
+    )}
     {...props}
     ref={ref}
   >
     <SwitchPrimitives.Thumb
       className={cn(
-	'pointer-events-none block h-5 w-5 rounded-full bg-background shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-5 data-[state=unchecked]:translate-x-0')}
+        "pointer-events-none block h-5 w-5 rounded-full bg-background shadow-lg ring-0 transition-transform data-[state=checked]:translate-x-5 data-[state=unchecked]:translate-x-0"
+      )}
     />
-  </SwitchPrimitives.Root>))
+  </SwitchPrimitives.Root>
+))
 Switch.displayName = SwitchPrimitives.Root.displayName
 
 export { Switch }

frontend/src/components/ui/toast.tsx

@@ -1,115 +1,129 @@
-"use client"
-
-import * as React from "react"
-import * as ToastPrimitives from "@radix-ui/react-toast"
-import { cva, type VariantProps } from "class-variance-authority"
-import { X } from "lucide-react"
-
-import { cn } from "@/lib/utils"
-
-const ToastProvider = ToastPrimitives.Provider
-
-const ToastViewport = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Viewport>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Viewport>
->(({ className, ...props }, ref) => (
-  <ToastPrimitives.Viewport
-    ref={ref}
-    className={cn(
-      "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
-      className
)}
-    {...props}
-  />
))
-ToastViewport.displayName = ToastPrimitives.Viewport.displayName
-
-const toastVariants = cva(
-  "group pointer-events-auto relative flex w-full items-center justify-between space-x-4 overflow-hidden rounded-md border p-6 pr-8 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full data-[state=open]:sm:slide-in-from-bottom-full",
-  {
-    variants: {
-      variant: {
-	default: "border bg-background text-foreground",
-	destructive:
-	  "destructive group border-destructive bg-destructive text-destructive-foreground",
-      },
-    },
-    defaultVariants: { variant: "default" } }
)
-
-const Toast = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Root>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Root> &
-    VariantProps<typeof toastVariants>
->(({ className, variant, ...props }, ref) => {
-  return (
-    <ToastPrimitives.Root
-      ref={ref}
-      className={cn(toastVariants({ variant }), className)}
-      {...props}
-    />
)
})
-Toast.displayName = ToastPrimitives.Root.displayName
-
-const ToastAction = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Action>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Action>
->(({ className, ...props }, ref) => (
-  <ToastPrimitives.Action
-    ref={ref}
-    className={cn(
-      "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium ring-offset-background transition-colors hover:bg-secondary focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 group-[.destructive]:hover:border-destructive/30 group-[.destructive]:hover:bg-destructive group-[.destructive]:hover:text-destructive-foreground group-[.destructive]:focus:ring-destructive",
-      className
)}
-    {...props}
-  />
))
-ToastAction.displayName = ToastPrimitives.Action.displayName
-
-const ToastClose = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Close>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Close>
->(({ className, ...props }, ref) => (
-  <ToastPrimitives.Close
-    ref={ref}
-    className={cn(
-      "absolute right-2 top-2 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none focus:ring-2 group-hover:opacity-100 group-[.destructive]:text-red-300 group-[.destructive]:hover:text-red-50 group-[.destructive]:focus:ring-red-400 group-[.destructive]:focus:ring-offset-red-600",
-      className
)}
-    toast-close=""
-    {...props}
-  >
-    <X className="h-4 w-4" />
-  </ToastPrimitives.Close>
))
-ToastClose.displayName = ToastPrimitives.Close.displayName
-
-const ToastTitle = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Title>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Title>
->(({ className, ...props }, ref) => (
-  <ToastPrimitives.Title
-    ref={ref}
-    className={cn("text-sm font-semibold", className)}
-    {...props}
-  />
))
-ToastTitle.displayName = ToastPrimitives.Title.displayName
-
-const ToastDescription = React.forwardRef<
-  React.ElementRef<typeof ToastPrimitives.Description>,
-  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Description>
->(({ className, ...props }, ref) => (
-  <ToastPrimitives.Description
-    ref={ref}
-    className={cn("text-sm opacity-90", className)}
-    {...props}
-  />
))
-ToastDescription.displayName = ToastPrimitives.Description.displayName
-
-type ToastProps = React.ComponentPropsWithoutRef<typeof Toast>
-
-type ToastActionElement = React.ReactElement<typeof ToastAction>
-
-export {
-  type ToastProps,
-  type ToastActionElement,
-  ToastProvider,
-  ToastViewport,
-  Toast,
-  ToastTitle,
-  ToastDescription,
-  ToastClose,
-  ToastAction,
-}
+"use client"
+
+import * as React from "react"
+import * as ToastPrimitives from "@radix-ui/react-toast"
+import { cva, type VariantProps } from "class-variance-authority"
+import { X } from "lucide-react"
+
+import { cn } from "@/lib/utils"
+
+const ToastProvider = ToastPrimitives.Provider
+
+const ToastViewport = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Viewport>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Viewport>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Viewport
+    ref={ref}
+    className={cn(
+      "fixed top-0 z-[100] flex max-h-screen w-full flex-col-reverse p-4 sm:bottom-0 sm:right-0 sm:top-auto sm:flex-col md:max-w-[420px]",
+      className
+    )}
+    {...props}
+  />
+))
+ToastViewport.displayName = ToastPrimitives.Viewport.displayName
+
+const toastVariants = cva(
+  "group pointer-events-auto relative flex w-full items-center justify-between space-x-4 overflow-hidden rounded-md border p-6 pr-8 shadow-lg transition-all data-[swipe=cancel]:translate-x-0 data-[swipe=end]:translate-x-[var(--radix-toast-swipe-end-x)] data-[swipe=move]:translate-x-[var(--radix-toast-swipe-move-x)] data-[swipe=move]:transition-none data-[state=open]:animate-in data-[state=closed]:animate-out data-[swipe=end]:animate-out data-[state=closed]:fade-out-80 data-[state=closed]:slide-out-to-right-full data-[state=open]:slide-in-from-top-full data-[state=open]:sm:slide-in-from-bottom-full",
+  {
+    variants: {
+      variant: {
+        default: "border bg-background text-foreground",
+        destructive:
+          "destructive group border-destructive bg-destructive text-destructive-foreground",
+      },
+    },
+    defaultVariants: {
+      variant: "default",
+    },
+  }
+)
+
+const Toast = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Root>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Root> &
+    VariantProps<typeof toastVariants>
+>(({ className, variant, ...props }, ref) => {
+  return (
+    <ToastPrimitives.Root
+      ref={ref}
+      className={cn(toastVariants({ variant }), className)}
+      {...props}
+    />
+  )
+})
+Toast.displayName = ToastPrimitives.Root.displayName
+
+const ToastAction = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Action>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Action>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Action
+    ref={ref}
+    className={cn(
+      "inline-flex h-8 shrink-0 items-center justify-center rounded-md border bg-transparent px-3 text-sm font-medium ring-offset-background transition-colors hover:bg-secondary focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 group-[.destructive]:border-muted/40 group-[.destructive]:hover:border-destructive/30 group-[.destructive]:hover:bg-destructive group-[.destructive]:hover:text-destructive-foreground group-[.destructive]:focus:ring-destructive",
+      className
+    )}
+    {...props}
+  />
+))
+ToastAction.displayName = ToastPrimitives.Action.displayName
+
+const ToastClose = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Close>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Close>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Close
+    ref={ref}
+    className={cn(
+      "absolute right-2 top-2 rounded-md p-1 text-foreground/50 opacity-0 transition-opacity hover:text-foreground focus:opacity-100 focus:outline-none focus:ring-2 group-hover:opacity-100 group-[.destructive]:text-red-300 group-[.destructive]:hover:text-red-50 group-[.destructive]:focus:ring-red-400 group-[.destructive]:focus:ring-offset-red-600",
+      className
+    )}
+    toast-close=""
+    {...props}
+  >
+    <X className="h-4 w-4" />
+  </ToastPrimitives.Close>
+))
+ToastClose.displayName = ToastPrimitives.Close.displayName
+
+const ToastTitle = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Title>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Title>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Title
+    ref={ref}
+    className={cn("text-sm font-semibold", className)}
+    {...props}
+  />
+))
+ToastTitle.displayName = ToastPrimitives.Title.displayName
+
+const ToastDescription = React.forwardRef<
+  React.ElementRef<typeof ToastPrimitives.Description>,
+  React.ComponentPropsWithoutRef<typeof ToastPrimitives.Description>
+>(({ className, ...props }, ref) => (
+  <ToastPrimitives.Description
+    ref={ref}
+    className={cn("text-sm opacity-90", className)}
+    {...props}
+  />
+))
+ToastDescription.displayName = ToastPrimitives.Description.displayName
+
+type ToastProps = React.ComponentPropsWithoutRef<typeof Toast>
+
+type ToastActionElement = React.ReactElement<typeof ToastAction>
+
+export {
+  type ToastProps,
+  type ToastActionElement,
+  ToastProvider,
+  ToastViewport,
+  Toast,
+  ToastTitle,
+  ToastDescription,
+  ToastClose,
+  ToastAction,
+}

frontend/src/components/ui/toaster.tsx

@@ -1,30 +1,31 @@
-'use client'
-
-import { useToast } from '@/components/ui/use-toast'
-import { Toast,
-	 ToastClose,
-	 ToastDescription,
-	 ToastProvider,
-	 ToastTitle,
-	 ToastViewport } from '@/components/ui/toast'
-
-
-export const Toaster = () => {
-  const { toasts } = useToast ()
-
-  return (
-    <ToastProvider>
-      {toasts.map (({ id, title, description, action, ...props }) => (
-	  <Toast key={id}
-		 className="bg-gray-300/80 dark:bg-gray-700/80"
-		 {...props}>
-	    <div className="grid gap-1">
-	      {title && <ToastTitle>{title}</ToastTitle>}
-	      {description && <ToastDescription>{description}</ToastDescription>}
-	    </div>
-	    {action}
-	    <ToastClose />
-	  </Toast>))}
-      <ToastViewport />
-    </ToastProvider>
)
-}
+'use client'
+
+import { useToast } from '@/components/ui/use-toast'
+import { Toast,
+	 ToastClose,
+	 ToastDescription,
+	 ToastProvider,
+	 ToastTitle,
+	 ToastViewport } from '@/components/ui/toast'
+
+
+export const Toaster = () => {
+  const { toasts } = useToast ()
+
+  return (
+    <ToastProvider>
+      {toasts.map (({ id, title, description, action, ...props }) => (
+	  <Toast key={id}
+		 className="bg-gray-300/80 dark:bg-gray-700/80"
+		 {...props}>
+	    <div className="grid gap-1">
+	      {title && <ToastTitle>{title}</ToastTitle>}
+	      {description && <ToastDescription>{description}</ToastDescription>}
+	    </div>
+	    {action}
+	    <ToastClose />
+	  </Toast>))}
+      <ToastViewport />
+    </ToastProvider>
+  )
+}

frontend/src/components/ui/use-toast.tsx

@@ -58,7 +58,8 @@ const addToRemoveQueue = (toastId: string) => {
     toastTimeouts.delete(toastId)
     dispatch({
       type: "REMOVE_TOAST",
-      toastId: toastId})
+      toastId: toastId,
+    })
   }, TOAST_REMOVE_DELAY)
 
   toastTimeouts.set(toastId, timeout)
@@ -68,14 +69,17 @@ export const reducer = (state: State, action: Action): State => {
   switch (action.type) {
     case "ADD_TOAST":
       return {
-	...state,
-	toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT)}
+        ...state,
+        toasts: [action.toast, ...state.toasts].slice(0, TOAST_LIMIT),
+      }
 
     case "UPDATE_TOAST":
       return {
-	...state,
-	toasts: state.toasts.map((t) =>
-	  t.id === action.toast.id ? { ...t, ...action.toast } : t)}
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === action.toast.id ? { ...t, ...action.toast } : t
+        ),
+      }
 
     case "DISMISS_TOAST": {
       const { toastId } = action
@@ -83,31 +87,36 @@ export const reducer = (state: State, action: Action): State => {
       // ! Side effects ! - This could be extracted into a dismissToast() action,
       // but I'll keep it here for simplicity
       if (toastId) {
-	addToRemoveQueue(toastId)
+        addToRemoveQueue(toastId)
       } else {
-	state.toasts.forEach((toast) => {
-	  addToRemoveQueue(toast.id)
-	})
+        state.toasts.forEach((toast) => {
+          addToRemoveQueue(toast.id)
+        })
       }
 
       return {
-	...state,
-	toasts: state.toasts.map((t) =>
-	  t.id === toastId || toastId === undefined
-	    ? {
-		...t,
-		open: false}
-	    : t)}
+        ...state,
+        toasts: state.toasts.map((t) =>
+          t.id === toastId || toastId === undefined
+            ? {
+                ...t,
+                open: false,
+              }
+            : t
+        ),
+      }
     }
     case "REMOVE_TOAST":
       if (action.toastId === undefined) {
-	return {
-	  ...state,
-	  toasts: []}
+        return {
+          ...state,
+          toasts: [],
+        }
       }
       return {
-	...state,
-	toasts: state.toasts.filter((t) => t.id !== action.toastId)}
+        ...state,
+        toasts: state.toasts.filter((t) => t.id !== action.toastId),
+      }
   }
 }
 
@@ -130,7 +139,8 @@ function toast({ ...props }: Toast) {
   const update = (props: ToasterToast) =>
     dispatch({
       type: "UPDATE_TOAST",
-      toast: { ...props, id }})
+      toast: { ...props, id },
+    })
   const dismiss = () => dispatch({ type: "DISMISS_TOAST", toastId: id })
 
   dispatch({
@@ -140,13 +150,16 @@ function toast({ ...props }: Toast) {
       id,
       open: true,
       onOpenChange: (open) => {
-	if (!open) dismiss()
-      }}})
+        if (!open) dismiss()
+      },
+    },
+  })
 
   return {
     id: id,
     dismiss,
-    update}
+    update,
+  }
 }
 
 function useToast() {
@@ -157,7 +170,7 @@ function useToast() {
     return () => {
       const index = listeners.indexOf(setState)
       if (index > -1) {
-	listeners.splice(index, 1)
+        listeners.splice(index, 1)
       }
     }
   }, [state])
@@ -165,7 +178,8 @@ function useToast() {
   return {
     ...state,
     toast,
-    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId })}
+    dismiss: (toastId?: string) => dispatch({ type: "DISMISS_TOAST", toastId }),
+  }
 }
 
 export { useToast, toast }

frontend/src/config.sample.ts

@@ -3,7 +3,8 @@ const ENV: string = 'development'
 
 const config = {
   API_BASE_URL: ENV === 'production' ? 'https://hub.nizika.monster/api' : 'http://localhost:3002',
-  SITE_TITLE:   'ぼざクリ タグ広場'}
+  SITE_TITLE:   'ぼざクリ タグ広場'
+}
 
 export const API_BASE_URL = config.API_BASE_URL
 export const SITE_TITLE = config.SITE_TITLE

frontend/src/consts.ts

@@ -10,7 +10,8 @@ export const CATEGORIES = [
     'general',
     'material',
     'meta',
-    'nico'] as const
+    'nico',
+    ] as const
 
 export const CATEGORY_NAMES: Record<Category, string> = {
     deerjikist: 'ニジラー',
@@ -19,14 +20,16 @@ export const CATEGORY_NAMES: Record<Category, string> = {
     general:    '一般',
     material:   '素材',
     meta:       'メタタグ',
-    nico:       'ニコニコタグ'} as const
+    nico:       'ニコニコタグ',
+    } as const
 
 export const FETCH_POSTS_ORDER_FIELDS = [
     'title',
     'url',
     'original_created_at',
     'created_at',
-    'updated_at'] as const
+    'updated_at',
+    ] as const
 
 export const PLATFORMS = ['nico', 'youtube'] as const
 
@@ -40,11 +43,13 @@ export const TAG_COLOUR = {
     general:    'cyan',
     material:   'orange',
     meta:       'yellow',
-    nico:       'gray'} as const satisfies Record<Category, string>
+    nico:       'gray',
+    } as const satisfies Record<Category, string>
 
 export const USER_ROLES = ['admin', 'member', 'guest'] as const
 
 export const ViewFlagBehavior = {
     OnShowedDetail: 1,
     OnClickedLink:  2,
-    NotAuto:        3} as const
+    NotAuto:        3,
+    } as const

frontend/src/index.css

@@ -132,20 +132,3 @@ body
   0%, 100% { color: #f87171; }
   50% { color: #60a5fa; }
 }
-
-.tag-marquee
-{
-  position: relative;
-}
-
-.tag-marquee__animated
-{
-  position: absolute;
-  inset: 0 auto 0 0;
-  min-width: 100%;
-  width: max-content;
-  opacity: 0;
-  pointer-events: none;
-  white-space: nowrap;
-  will-change: transform;
-}

frontend/src/lib/api.ts

@@ -23,7 +23,8 @@ const apiP = async <T> (
     method: 'post' | 'put' | 'patch',
     path:   string,
     body?:  unknown,
-    opt?:   Opt): Promise<T> => {
+    opt?:   Opt,
+): Promise<T> => {
   const res = await client[method] (path, body ?? { }, withUserCode (opt))
   if (opt?.responseType === 'blob')
     return res.data as T
@@ -33,7 +34,8 @@ const apiP = async <T> (
 
 export const apiGet = async <T> (
     path: string,
-    opt?: Opt): Promise<T> => {
+    opt?: Opt,
+): Promise<T> => {
   const res = await client.get (path, withUserCode (opt))
   if (opt?.responseType === 'blob')
     return res.data as T
@@ -44,24 +46,28 @@ export const apiGet = async <T> (
 export const apiPost = async <T> (
     path:   string,
     body?:  unknown,
-    opt?:   Opt): Promise<T> => apiP ('post', path, body, opt)
+    opt?:   Opt,
+): Promise<T> => apiP ('post', path, body, opt)
 
 
 export const apiPut = async <T> (
     path:   string,
     body?:  unknown,
-    opt?:   Opt): Promise<T> => apiP ('put', path, body, opt)
+    opt?:   Opt,
+): Promise<T> => apiP ('put', path, body, opt)
 
 
 export const apiPatch = async <T> (
     path:   string,
     body?:  unknown,
-    opt?:   Opt): Promise<T> => apiP ('patch', path, body, opt)
+    opt?:   Opt,
+): Promise<T> => apiP ('patch', path, body, opt)
 
 
 export const apiDelete = async <T = void> (
     path: string,
-    opt?: Opt): Promise<T> => {
+    opt?: Opt,
+): Promise<T> => {
   const res = await client.delete (path, withUserCode (opt))
   if (res.data == null || res.data === '')
     return undefined as T

frontend/src/lib/gekanator.test.ts

@@ -1,11 +1,9 @@
 import { beforeEach, describe, expect, it, vi } from 'vitest'
 
-import { apiGet, apiPost } from '@/lib/api'
+import { apiPost } from '@/lib/api'
 import {
   buildGekanatorQuestions,
   expectedAnswerForQuestion,
-  fetchGekanatorPosts,
-  fetchGekanatorQuestions,
   learnedSemanticSideForPost,
   questionIdForCondition,
   restoreGekanatorQuestion,
@@ -26,7 +24,6 @@ vi.mock('@/lib/api', () => ({
 }))
 
 const mockedApiPost = vi.mocked(apiPost)
-const mockedApiGet = vi.mocked(apiGet)
 
 const post = (overrides: Partial<Post> = {}): Post => ({
   id: 1,
@@ -46,24 +43,6 @@ const post = (overrides: Partial<Post> = {}): Post => ({
   ...overrides,
 })
 
-describe('Gekanator API functions', () => {
-  it('returns posts from the Gekanator posts endpoint', async () => {
-    const posts = [post()]
-    mockedApiGet.mockResolvedValueOnce({ posts })
-
-    await expect(fetchGekanatorPosts()).resolves.toEqual(posts)
-    expect(mockedApiGet).toHaveBeenCalledWith('/gekanator/posts')
-  })
-
-  it('returns questions from the Gekanator questions endpoint', async () => {
-    const questions: StoredGekanatorQuestion[] = []
-    mockedApiGet.mockResolvedValueOnce({ questions })
-
-    await expect(fetchGekanatorQuestions()).resolves.toEqual(questions)
-    expect(mockedApiGet).toHaveBeenCalledWith('/gekanator/questions')
-  })
-})
-
 describe('expectedAnswerForQuestion', () => {
   it('returns a direct example answer when present', () => {
     const question: StoredGekanatorQuestion = {
@@ -147,7 +126,6 @@ describe('expectedAnswerForQuestion', () => {
               postCount: 1,
               createdAt: '2026-06-10T00:00:00.000Z',
               updatedAt: '2026-06-10T00:00:00.000Z',
-              deprecatedAt: null,
               hasWiki: false,
               hasDeerjikists: false,
               materialId: null,

frontend/src/lib/gekanator.ts

@@ -104,7 +104,8 @@ export type BuildGekanatorQuestionsOptions = {
 
 
 export const normalizeTitleLengthCondition = (
-    condition:  GekanatorQuestionCondition): GekanatorQuestionCondition => {
+    condition:  GekanatorQuestionCondition,
+): GekanatorQuestionCondition => {
   switch (condition.type)
   {
   case 'title-length-greater-than':
@@ -118,7 +119,8 @@ export const normalizeTitleLengthCondition = (
 
 
 export const titleLengthMinimumForCondition = (
-    condition:  GekanatorQuestionCondition): number | null => {
+    condition:  GekanatorQuestionCondition,
+): number | null => {
   switch (condition.type)
   {
   case 'title-length-at-least':
@@ -132,7 +134,8 @@ export const titleLengthMinimumForCondition = (
 
 
 export const questionIdForCondition = (
-    condition:  NonPostSimilarityCondition): string => {
+    condition:  NonPostSimilarityCondition,
+): string => {
   switch (condition.type)
   {
   case 'tag':
@@ -158,7 +161,8 @@ export const questionIdForCondition = (
 
 const directExampleAnswerFor = (
     question:  StoredGekanatorQuestion,
-    post:      Post): GekanatorAnswerValue | null => {
+    post:      Post,
+): GekanatorAnswerValue | null => {
   if (question.kind !== 'post_similarity' && question.kind !== 'tag')
     return null
 
@@ -174,13 +178,15 @@ const directExampleAnswerFor = (
 
 
 export const isLearnedSemanticQuestion = (
-    question:  StoredGekanatorQuestion | GekanatorQuestion): boolean =>
+    question:  StoredGekanatorQuestion | GekanatorQuestion,
+): boolean =>
     question.kind === 'post_similarity'
     && question.source === 'user_suggested'
 
 
 export const learnedSemanticSideForAnswer = (
-    answer:  GekanatorAnswerValue | null): LearnedSemanticSide => {
+    answer:  GekanatorAnswerValue | null,
+): LearnedSemanticSide => {
   if (answer === 'yes' || answer === 'partial')
     return 'positive'
 
@@ -308,7 +314,8 @@ const questionableTag = (post: Post, key: string): boolean => {
 
 const questionMatches = (
     post:       Post,
-    question:   StoredGekanatorQuestion): boolean => {
+    question:   StoredGekanatorQuestion,
+): boolean => {
   const directAnswer = directExampleAnswerFor (question, post)
   if (directAnswer)
     return question.kind === 'post_similarity'
@@ -343,7 +350,8 @@ const questionMatches = (
 
 export const expectedAnswerForQuestion = (
     question:  StoredGekanatorQuestion | GekanatorQuestion | undefined,
-    post:      Post | null): GekanatorAnswerValue | null => {
+    post:      Post | null,
+): GekanatorAnswerValue | null => {
   if (!(question) || !(post))
     return null
 
@@ -374,12 +382,14 @@ export const expectedAnswerForQuestion = (
 
 export const learnedSemanticSideForPost = (
     question:  StoredGekanatorQuestion | GekanatorQuestion | undefined,
-    post:      Post | null): LearnedSemanticSide =>
+    post:      Post | null,
+): LearnedSemanticSide =>
     learnedSemanticSideForAnswer (expectedAnswerForQuestion (question, post))
 
 
 export const restoreGekanatorQuestion = (
-    question:  StoredGekanatorQuestion): GekanatorQuestion => {
+    question:  StoredGekanatorQuestion,
+): GekanatorQuestion => {
   const normalizedCondition = normalizeTitleLengthCondition (question.condition)
   const normalizedQuestion = {
       ...question,
@@ -398,7 +408,8 @@ export const restoreGekanatorQuestion = (
 
 
 export const storeGekanatorQuestion = (
-    question:  GekanatorQuestion): StoredGekanatorQuestion => ({
+    question:  GekanatorQuestion,
+): StoredGekanatorQuestion => ({
   id: question.condition.type === 'title-length-greater-than'
       ? `title:length-at-least:${ question.condition.length + 1 }`
       : question.id,
@@ -425,7 +436,8 @@ export const fetchGekanatorQuestions = async (): Promise<StoredGekanatorQuestion
 
 export const fetchGekanatorExtraQuestions = async (
     gameId:  number,
-    nonce?: string): Promise<GekanatorExtraQuestion[]> => {
+    nonce?: string,
+): Promise<GekanatorExtraQuestion[]> => {
   const data = await apiGet<{ questions: GekanatorExtraQuestion[] }> (
       `/gekanator/games/${ gameId }/extra_questions`,
       { params: nonce ? { nonce } : undefined })
@@ -435,7 +447,8 @@ export const fetchGekanatorExtraQuestions = async (
 
 export const buildGekanatorQuestions = (
     posts:    Post[],
-    options:  BuildGekanatorQuestionsOptions = { }): GekanatorQuestion[] => {
+    options:  BuildGekanatorQuestionsOptions = { },
+): GekanatorQuestion[] => {
   const {
       includeTitleContains = true,
       tagQuestionCap = 192,
@@ -477,7 +490,8 @@ export const buildGekanatorQuestions = (
 
   const usefulEntries = <T extends string | number> (
       counts:  Map<T, number>,
-      cap:     number) =>
+      cap:     number,
+  ) =>
       [...counts.entries ()]
       .filter (([, count]) => count > 0 && count < posts.length)
       .sort ((a, b) => Math.abs (posts.length / 2 - a[1])