#279

backend/Gemfile

@@ -50,6 +50,8 @@ group :development, :test do
   gem 'factory_bot_rails'
 end
 
+
+
 gem "mysql2", "~> 0.5.6"
 
 gem "image_processing", "~> 1.14"
@@ -67,5 +69,3 @@ gem 'whenever', require: false
 gem 'discard'
 
 gem "rspec-rails", "~> 8.0", :groups => [:development, :test]
-
-gem 'aws-sdk-s3', require: false

backend/Gemfile.lock

@@ -73,25 +73,6 @@ GEM
       tzinfo (~> 2.0, >= 2.0.5)
       uri (>= 0.13.1)
     ast (2.4.3)
-    aws-eventstream (1.4.0)
-    aws-partitions (1.1231.0)
-    aws-sdk-core (3.244.0)
-      aws-eventstream (~> 1, >= 1.3.0)
-      aws-partitions (~> 1, >= 1.992.0)
-      aws-sigv4 (~> 1.9)
-      base64
-      bigdecimal
-      jmespath (~> 1, >= 1.6.1)
-      logger
-    aws-sdk-kms (1.123.0)
-      aws-sdk-core (~> 3, >= 3.244.0)
-      aws-sigv4 (~> 1.5)
-    aws-sdk-s3 (1.217.0)
-      aws-sdk-core (~> 3, >= 3.244.0)
-      aws-sdk-kms (~> 1)
-      aws-sigv4 (~> 1.5)
-    aws-sigv4 (1.12.1)
-      aws-eventstream (~> 1, >= 1.0.2)
     base64 (0.2.0)
     bcrypt_pbkdf (1.1.1)
     bcrypt_pbkdf (1.1.1-arm64-darwin)
@@ -176,7 +157,6 @@ GEM
       pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    jmespath (1.6.2)
     json (2.12.0)
     jwt (2.10.1)
       base64
@@ -461,7 +441,6 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  aws-sdk-s3
   bootsnap
   brakeman
   diff-lcs

backend/app/controllers/materials_controller.rb

@@ -1,101 +0,0 @@
-class MaterialsController < 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
-
-    tag_id = params[:tag_id].presence
-    parent_id = params[:parent_id].presence
-
-    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.count
-    materials = q.order(created_at: :desc, id: :desc).limit(limit).offset(offset)
-
-    render json: { materials: MaterialRepr.many(materials, host: request.base_url), count: count }
-  end
-
-  def show
-    material =
-        Material
-        .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
-
-    render json: MaterialRepr.base(material, host: request.base_url).merge(wiki_page_body:)
-  end
-
-  def create
-    return head :unauthorized unless current_user
-
-    tag_name_raw = params[:tag].to_s.strip
-    file = params[:file]
-    url = params[:url].to_s.strip.presence
-    return head :bad_request if tag_name_raw.blank? || (file.blank? && url.blank?)
-
-    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)
-
-    if material.save
-      render json: MaterialRepr.base(material, host: request.base_url), status: :created
-    else
-      render json: { errors: material.errors.full_messages }, status: :unprocessable_entity
-    end
-  end
-
-  def update
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    material = Material.with_attached_file.find_by(id: params[:id])
-    return head :not_found unless material
-
-    tag_name_raw = params[:tag].to_s.strip
-    file = params[:file]
-    url = params[:url].to_s.strip.presence
-    return head :bad_request if tag_name_raw.blank? || (file.blank? && url.blank?)
-
-    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.update!(tag:, url:, updated_by_user: current_user)
-    if file
-      material.file.attach(file)
-    else
-      material.file.purge
-    end
-
-    if material.save
-      render json: MaterialRepr.base(material, host: request.base_url)
-    else
-      render json: { errors: material.errors.full_messages }, status: :unprocessable_entity
-    end
-  end
-
-  def destroy
-    return head :unauthorized unless current_user
-    return head :forbidden unless current_user.gte_member?
-
-    material = Material.find_by(id: params[:id])
-    return head :not_found unless material
-
-    material.discard
-    head :no_content
-  end
-end

backend/app/controllers/tags_controller.rb

@@ -2,8 +2,8 @@ class TagsController < ApplicationController
   def index
     post_id = params[:post]
 
-    name = params[:name].presence
-    category = params[:category].presence
+    name = params[:name].to_s.strip.presence
+    category = params[:category].to_s.strip.presence
     post_count_between = (params[:post_count_gte].presence || -1).to_i,
                          (params[:post_count_lte].presence || -1).to_i
     post_count_between[0] = nil if post_count_between[0] < 0
@@ -33,11 +33,13 @@ class TagsController < ApplicationController
         else
           Tag.joins(:tag_name)
         end
-        .includes(:tag_name, :materials, tag_name: :wiki_page)
+        .includes(:tag_name, tag_name: :wiki_page)
     q = q.where(posts: { id: post_id }) if post_id.present?
 
-    q = q.where('tag_names.name LIKE ?', "%#{ name }%") if name
-    q = q.where(category:) if category
+    if name
+      q = q.where('tag_names.name LIKE ?', "%#{ ActiveRecord::Base.sanitize_sql_like(name) }%")
+    end
+    q = q.where(category: category) if category
     q = q.where('tags.post_count >= ?', post_count_between[0]) if post_count_between[0]
     q = q.where('tags.post_count <= ?', post_count_between[1]) if post_count_between[1]
     q = q.where('tags.created_at >= ?', created_between[0]) if created_between[0]
@@ -69,44 +71,6 @@ class TagsController < ApplicationController
     render json: { tags: TagRepr.base(tags), count: q.size }
   end
 
-  def with_depth
-    parent_tag_id = params[:parent].to_i
-    parent_tag_id = nil if parent_tag_id <= 0
-
-    tag_ids =
-        if parent_tag_id
-          TagImplication.where(parent_tag_id:).select(:tag_id)
-        else
-          Tag.where.not(id: TagImplication.select(:tag_id)).select(:id)
-        end
-
-    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
     q = params[:q].to_s.strip.sub(/\Anot:/i, '')
 
@@ -115,7 +79,7 @@ class TagsController < ApplicationController
 
     alias_rows =
         TagName
-        .where('name LIKE ?', "#{ q }%")
+        .where('name LIKE ?', "#{ ActiveRecord::Base.sanitize_sql_like(q) }%")
         .where.not(canonical_id: nil)
         .pluck(:canonical_id, :name)
 
@@ -128,14 +92,15 @@ class TagsController < ApplicationController
     end
 
     base = Tag.joins(:tag_name)
-              .includes(:tag_name, :materials, tag_name: :wiki_page)
+              .includes(:tag_name, tag_name: :wiki_page)
     base = base.where('tags.post_count > 0') if present_only
 
     canonical_hit =
         base
         .where(((with_nico ? '(tags.category = ? AND tag_names.name LIKE ?) OR ' : '') +
                 'tag_names.name LIKE ?'),
-               *(with_nico ? ['nico', "nico:#{ q }%"] : []), "#{ q }%")
+               *(with_nico ? ['nico', "nico:#{ ActiveRecord::Base.sanitise_sql_like(q) }%"] : []),
+               "#{ ActiveRecord::Base.sanitise_sql_like(q) }%")
 
     tags =
         if canonical_ids.present?
@@ -153,7 +118,7 @@ class TagsController < ApplicationController
 
   def show
     tag = Tag.joins(:tag_name)
-             .includes(:tag_name, :materials, tag_name: :wiki_page)
+             .includes(:tag_name, tag_name: :wiki_page)
              .find_by(id: params[:id])
     if tag
       render json: TagRepr.base(tag)
@@ -167,7 +132,7 @@ class TagsController < ApplicationController
     return head :bad_request if name.blank?
 
     tag = Tag.joins(:tag_name)
-             .includes(:tag_name, :materials, tag_name: :wiki_page)
+             .includes(:tag_name, tag_name: :wiki_page)
              .find_by(tag_names: { name: })
     if tag
       render json: TagRepr.base(tag)
@@ -197,18 +162,6 @@ class TagsController < ApplicationController
     render json: DeerjikistRepr.many(tag.deerjikists)
   end
 
-  def materials_by_name
-    name = params[:name].to_s.strip
-    return head :bad_request if name.blank?
-
-    tag = Tag.joins(:tag_name)
-             .includes(:tag_name, :materials, tag_name: :wiki_page)
-             .find_by(tag_names: { name: })
-    return head :not_found unless tag
-
-    render json: build_tag_children(tag)
-  end
-
   def update
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
@@ -228,20 +181,4 @@ class TagsController < ApplicationController
 
     render json: TagRepr.base(tag)
   end
-
-  private
-
-  def build_tag_children(tag)
-    material = tag.materials.first
-    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: tag.children.sort_by { _1.name }.map { build_tag_children(_1) },
-        material: material.as_json&.merge(file:, content_type:))
-  end
 end

backend/app/controllers/theatre_comments_controller.rb

@@ -1,32 +0,0 @@
-class TheatreCommentsController < ApplicationController
-  def index
-    no_gt = params[:no_gt].to_i
-    no_gt = 0 if no_gt.negative?
-
-    comments = TheatreComment
-               .where(theatre_id: params[:theatre_id])
-               .where('no > ?', no_gt)
-               .order(no: :desc)
-
-    render json: comments.as_json(include: { user: { only: [:id, :name] } })
-  end
-
-  def create
-    return head :unauthorized unless current_user
-
-    content = params[:content]
-    return head :unprocessable_entity if content.blank?
-
-    theatre = Theatre.find_by(id: params[:theatre_id])
-    return head :not_found unless theatre
-
-    comment = nil
-    theatre.with_lock do
-      no = theatre.next_comment_no
-      comment = TheatreComment.create!(theatre:, no:, user: current_user, content:)
-      theatre.update!(next_comment_no: no + 1)
-    end
-
-    render json: comment, status: :created
-  end
-end

backend/app/controllers/theatres_controller.rb

@@ -31,9 +31,7 @@ class TheatresController < ApplicationController
       post_started_at = theatre.current_post_started_at
     end
 
-    render json: {
-        host_flg:, post_id:, post_started_at:,
-        watching_users: theatre.watching_users.as_json(only: [:id, :name]) }
+    render json: { host_flg:, post_id:, post_started_at: }
   end
 
   def next_post

backend/app/models/material.rb

@@ -1,39 +0,0 @@
-class Material < ApplicationRecord
-  include MyDiscard
-
-  default_scope -> { kept }
-
-  belongs_to :parent, class_name: 'Material', optional: true
-  has_many :children, class_name: 'Material', foreign_key: :parent_id, dependent: :nullify
-
-  belongs_to :tag, optional: true
-  belongs_to :created_by_user, class_name: 'User', optional: true
-  belongs_to :updated_by_user, class_name: 'User', optional: true
-
-  has_one_attached :file, dependent: :purge
-
-  validates :tag_id, presence: true, uniqueness: true
-
-  validate :file_must_be_attached
-  validate :tag_must_be_material_category
-
-  def content_type
-    return nil unless file&.attached?
-
-    file.blob.content_type
-  end
-
-  private
-
-  def file_must_be_attached
-    return if url.present? || file.attached?
-
-    errors.add(:url, 'URL かファイルのどちらかは必須です．')
-  end
-
-  def tag_must_be_material_category
-    return if tag.blank? || tag.character? || tag.material?
-
-    errors.add(:tag, '素材カテゴリのタグを指定してください．')
-  end
-end

backend/app/models/tag.rb

@@ -31,7 +31,6 @@ class Tag < ApplicationRecord
            class_name: 'TagSimilarity', foreign_key: :target_tag_id, dependent: :delete_all
 
   has_many :deerjikists, dependent: :delete_all
-  has_many :materials
 
   belongs_to :tag_name
   delegate :wiki_page, to: :tag_name
@@ -73,8 +72,6 @@ class Tag < ApplicationRecord
 
   def has_wiki = wiki_page.present?
 
-  def material_id = materials.first&.id
-
   def self.tagme
     @tagme ||= find_or_create_by_tag_name!('タグ希望', category: :meta)
   end

backend/app/models/theatre_comment.rb

@@ -1,8 +1,8 @@
 class TheatreComment < ApplicationRecord
-  include Discard::Model
+  include MyDiscard
 
   self.primary_key = :theatre_id, :no
 
   belongs_to :theatre
-  belongs_to :user
 end
+

backend/app/representations/material_repr.rb

@@ -1,24 +0,0 @@
-# frozen_string_literal: true
-
-
-module MaterialRepr
-  BASE = { only: [:id, :url, :created_at, :updated_at],
-           methods: [:content_type],
-           include: { tag: TagRepr::BASE,
-                      created_by_user: UserRepr::BASE,
-                      updated_by_user: UserRepr::BASE } }.freeze
-
-  module_function
-
-  def base material, host:
-    material.as_json(BASE).merge(
-        file: if material.file.attached?
-                Rails.application.routes.url_helpers.rails_storage_proxy_url(
-                    material.file, host:)
-              end)
-  end
-
-  def many materials, host:
-    materials.map { |m| base(m, host:) }
-  end
-end

backend/app/representations/tag_repr.rb

@@ -3,7 +3,7 @@
 
 module TagRepr
   BASE = { only: [:id, :category, :post_count, :created_at, :updated_at],
-           methods: [:name, :has_wiki, :material_id] }.freeze
+           methods: [:name, :has_wiki] }.freeze
 
   module_function
 

backend/config/environments/production.rb

@@ -18,7 +18,8 @@ Rails.application.configure do
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.asset_host = "http://assets.example.com"
 
-  config.active_storage.service = :r2
+  # Store uploaded files on the local file system (see config/storage.yml for options).
+  config.active_storage.service = :local
 
   # Assume all access to the app is happening through a SSL-terminating reverse proxy.
   config.assume_ssl = true

backend/config/environments/test.rb

@@ -50,6 +50,4 @@ Rails.application.configure do
 
   # Raise error when a before_action's only/except options reference missing actions.
   config.action_controller.raise_on_missing_callback_actions = true
-
-  Rails.application.routes.default_url_options[:host] = 'www.example.com'
 end

backend/config/routes.rb

@@ -9,11 +9,9 @@ Rails.application.routes.draw do
   resources :tags, only: [:index, :show, :update] do
     collection do
       get :autocomplete
-      get :'with-depth', action: :with_depth
 
       scope :name do
         get ':name/deerjikists', action: :deerjikists_by_name
-        get ':name/materials', action: :materials_by_name
         get ':name', action: :show_by_name
       end
     end
@@ -80,9 +78,5 @@ Rails.application.routes.draw do
       put :watching
       patch :next_post
     end
-
-    resources :comments, controller: :theatre_comments, only: [:index, :create]
   end
-
-  resources :materials, only: [:index, :show, :create, :update, :destroy]
 end

backend/config/storage.yml

@@ -6,10 +6,29 @@ local:
   service: Disk
   root: <%= Rails.root.join("storage") %>
 
-r2:
-  service: S3
-  endpoint: <%= ENV['R2_ENDPOINT'] %>
-  access_key_id: <%= ENV['R2_ACCESS_KEY_ID'] %>
-  secret_access_key: <%= ENV['R2_SECRET_ACCESS_KEY'] %>
-  bucket: <%= ENV['R2_BUCKET'] %>
-  region: auto
+# Use bin/rails credentials:edit to set the AWS secrets (as aws:access_key_id|secret_access_key)
+# amazon:
+#   service: S3
+#   access_key_id: <%= Rails.application.credentials.dig(:aws, :access_key_id) %>
+#   secret_access_key: <%= Rails.application.credentials.dig(:aws, :secret_access_key) %>
+#   region: us-east-1
+#   bucket: your_own_bucket-<%= Rails.env %>
+
+# Remember not to checkin your GCS keyfile to a repository
+# google:
+#   service: GCS
+#   project: your_project
+#   credentials: <%= Rails.root.join("path/to/gcs.keyfile") %>
+#   bucket: your_own_bucket-<%= Rails.env %>
+
+# Use bin/rails credentials:edit to set the Azure Storage secret (as azure_storage:storage_access_key)
+# microsoft:
+#   service: AzureStorage
+#   storage_account_name: your_account_name
+#   storage_access_key: <%= Rails.application.credentials.dig(:azure_storage, :storage_access_key) %>
+#   container: your_container_name-<%= Rails.env %>
+
+# mirror:
+#   service: Mirror
+#   primary: local
+#   mirrors: [ amazon, google, microsoft ]

backend/db/migrate/20260329034700_create_materials.rb

@@ -1,34 +0,0 @@
-class CreateMaterials < ActiveRecord::Migration[8.0]
-  def change
-    create_table :materials do |t|
-      t.string :url
-      t.references :parent, index: true, foreign_key: { to_table: :materials }
-      t.references :tag, index: true, foreign_key: true
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.references :updated_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-      t.datetime :discarded_at, index: true
-      t.virtual :active_url, type: :string,
-                             as: 'IF(discarded_at IS NULL, url, NULL)',
-                             stored: false
-
-      t.index :active_url, unique: true
-    end
-
-    create_table :material_versions do |t|
-      t.references :material, null: false, foreign_key: true
-      t.integer :version_no, null: false
-      t.string :url, index: true
-      t.references :parent, index: true, foreign_key: { to_table: :materials }
-      t.references :tag, index: true, foreign_key: true
-      t.references :created_by_user, foreign_key: { to_table: :users }
-      t.references :updated_by_user, foreign_key: { to_table: :users }
-      t.timestamps
-      t.datetime :discarded_at, index: true
-
-      t.index [:material_id, :version_no],
-              unique: true,
-              name: 'index_material_versions_on_material_id_and_version_no'
-    end
-  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_03_29_034700) do
+ActiveRecord::Schema[8.0].define(version: 2026_03_17_015000) 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
@@ -56,45 +56,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_03_29_034700) do
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   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
-    t.string "url"
-    t.bigint "parent_id"
-    t.bigint "tag_id"
-    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.datetime "discarded_at"
-    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 ["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"
-  end
-
-  create_table "materials", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.string "url"
-    t.bigint "parent_id"
-    t.bigint "tag_id"
-    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.datetime "discarded_at"
-    t.virtual "active_url", type: :string, as: "if((`discarded_at` is null),`url`,NULL)"
-    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"
-    t.index ["parent_id"], name: "index_materials_on_parent_id"
-    t.index ["tag_id"], name: "index_materials_on_tag_id"
-    t.index ["updated_by_user_id"], name: "index_materials_on_updated_by_user_id"
-  end
-
   create_table "nico_tag_relations", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.bigint "nico_tag_id", null: false
     t.bigint "tag_id", null: false
@@ -278,19 +239,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_03_29_034700) do
     t.datetime "updated_at", null: false
   end
 
-  create_table "wiki_assets", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
-    t.bigint "wiki_page_id", null: false
-    t.integer "no", null: false
-    t.string "alt_text"
-    t.binary "sha256", limit: 32, null: false
-    t.bigint "created_by_user_id", null: false
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
-    t.index ["created_by_user_id"], name: "index_wiki_assets_on_created_by_user_id"
-    t.index ["wiki_page_id", "no"], name: "index_wiki_assets_on_wiki_page_id_and_no", unique: true
-    t.index ["wiki_page_id", "sha256"], name: "index_wiki_assets_on_wiki_page_id_and_sha256", unique: true
-  end
-
   create_table "wiki_lines", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.string "sha256", limit: 64, null: false
     t.text "body", null: false
@@ -306,7 +254,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_03_29_034700) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.datetime "discarded_at"
-    t.integer "next_asset_no", default: 1, null: false
     t.index ["created_user_id"], name: "index_wiki_pages_on_created_user_id"
     t.index ["discarded_at"], name: "index_wiki_pages_on_discarded_at"
     t.index ["tag_name_id"], name: "index_wiki_pages_on_tag_name_id", unique: true
@@ -345,15 +292,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_03_29_034700) do
 
   add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
   add_foreign_key "active_storage_variant_records", "active_storage_blobs", column: "blob_id"
-  add_foreign_key "material_versions", "materials"
-  add_foreign_key "material_versions", "materials", column: "parent_id"
-  add_foreign_key "material_versions", "tags"
-  add_foreign_key "material_versions", "users", column: "created_by_user_id"
-  add_foreign_key "material_versions", "users", column: "updated_by_user_id"
-  add_foreign_key "materials", "materials", column: "parent_id"
-  add_foreign_key "materials", "tags"
-  add_foreign_key "materials", "users", column: "created_by_user_id"
-  add_foreign_key "materials", "users", column: "updated_by_user_id"
   add_foreign_key "nico_tag_relations", "tags"
   add_foreign_key "nico_tag_relations", "tags", column: "nico_tag_id"
   add_foreign_key "post_similarities", "posts"
@@ -382,8 +320,6 @@ ActiveRecord::Schema[8.0].define(version: 2026_03_29_034700) do
   add_foreign_key "user_ips", "users"
   add_foreign_key "user_post_views", "posts"
   add_foreign_key "user_post_views", "users"
-  add_foreign_key "wiki_assets", "users", column: "created_by_user_id"
-  add_foreign_key "wiki_assets", "wiki_pages"
   add_foreign_key "wiki_pages", "tag_names"
   add_foreign_key "wiki_pages", "users", column: "created_user_id"
   add_foreign_key "wiki_pages", "users", column: "updated_user_id"

backend/spec/factories/theatre_comments.rb

@@ -1,8 +0,0 @@
-FactoryBot.define do
-  factory :theatre_comment do
-    association :theatre
-    association :user
-    sequence (:no) { |n| n }
-    content { 'test comment' }
-  end
-end

backend/spec/factories/theatres.rb

@@ -1,11 +0,0 @@
-FactoryBot.define do
-  factory :theatre do
-    name { 'Test Theatre' }
-    kind { 1 }
-    opens_at { Time.current }
-    closes_at { 1.day.from_now }
-    next_comment_no { 1 }
-
-    association :created_by_user, factory: :user
-  end
-end

backend/spec/requests/materials_spec.rb

@@ -1,378 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'Materials API', type: :request do
-  let!(:member_user) { create(:user, :member) }
-  let!(:guest_user)  { create(:user) }
-
-  def dummy_upload(filename: 'dummy.png', type: 'image/png', body: 'dummy')
-    Rack::Test::UploadedFile.new(StringIO.new(body), type, original_filename: filename)
-  end
-
-  def response_materials
-    json.fetch('materials')
-  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.file.attach(file) if file
-      material.save!
-    end
-  end
-
-  describe 'GET /materials' do
-    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'))
-    end
-
-    before do
-      old_time = Time.zone.local(2026, 3, 29, 1, 0, 0)
-      new_time = Time.zone.local(2026, 3, 29, 2, 0, 0)
-
-      material_a.update_columns(created_at: old_time, updated_at: old_time)
-      material_b.update_columns(created_at: new_time, updated_at: new_time)
-    end
-
-    it 'returns materials with count and metadata' do
-      get '/materials'
-
-      expect(response).to have_http_status(:ok)
-      expect(json).to include('materials', 'count')
-      expect(response_materials).to be_an(Array)
-      expect(json['count']).to eq(2)
-
-      row = response_materials.find { |m| m['id'] == material_b.id }
-      expect(row).to be_present
-      expect(row['tag']).to include(
-        'id' => tag_b.id,
-        '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')
-    end
-
-    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 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([material_b.id])
-    end
-
-    it 'paginates and keeps total count' do
-      get '/materials', params: { page: 2, limit: 1 }
-
-      expect(response).to have_http_status(:ok)
-      expect(json['count']).to eq(2)
-      expect(response_materials.size).to eq(1)
-      expect(response_materials.first['id']).to eq(material_a.id)
-    end
-
-    it 'normalises invalid page and limit' do
-      get '/materials', params: { page: 0, limit: 0 }
-
-      expect(response).to have_http_status(:ok)
-      expect(json['count']).to eq(2)
-      expect(response_materials.size).to eq(1)
-      expect(response_materials.first['id']).to eq(material_b.id)
-    end
-  end
-
-  describe 'GET /materials/:id' do
-    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
-
-    it 'returns a material with file, tag, and content_type' do
-      get "/materials/#{ material.id }"
-
-      expect(response).to have_http_status(:ok)
-      expect(json).to include(
-        'id' => material.id,
-        'content_type' => 'image/png'
-      )
-      expect(json['file']).to be_present
-      expect(json['tag']).to include(
-        'id' => tag.id,
-        'name' => 'material_show',
-        'category' => 'material'
-      )
-    end
-
-    it 'returns 404 when material does not exist' do
-      get '/materials/999999999'
-      expect(response).to have_http_status(:not_found)
-    end
-  end
-
-  describe 'POST /materials' do
-    context 'when not logged in' do
-      before { sign_out }
-
-      it 'returns 401' do
-        post '/materials', params: {
-          tag: 'material_create_unauthorized',
-          file: dummy_upload
-        }
-
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in' do
-      before { sign_in_as(guest_user) }
-
-      it 'returns 400 when tag is blank' do
-        post '/materials', params: { tag: '   ', file: dummy_upload }
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it 'returns 400 when both file and url are blank' do
-        post '/materials', params: { tag: 'material_create_blank' }
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it 'creates a material with an attached file' do
-        expect do
-          post '/materials', params: {
-            tag: 'material_create_new',
-            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)
-
-        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(guest_user)
-        expect(material.updated_by_user).to eq(guest_user)
-        expect(material.file.attached?).to be(true)
-
-        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')
-      end
-
-      it 'returns 422 when the existing tag is not material/character' do
-        general_tag_name = TagName.create!(name: 'material_create_general_tag')
-        Tag.create!(tag_name: general_tag_name, category: :general)
-
-        post '/materials', params: {
-          tag: 'material_create_general_tag',
-          file: dummy_upload
-        }
-
-        expect(response).to have_http_status(:unprocessable_entity)
-      end
-
-      it 'persists url-only material' do
-        expect do
-          post '/materials', params: {
-            tag: 'material_create_url_only',
-            url: 'https://example.com/material-source'
-          }
-        end.to change(Material, :count).by(1)
-
-        expect(response).to have_http_status(:created)
-
-        material = Material.order(:id).last
-        expect(material.tag.name).to eq('material_create_url_only')
-        expect(material.url).to eq('https://example.com/material-source')
-        expect(material.file.attached?).to be(false)
-      end
-
-      it 'returns the original url for url-only material' do
-        post '/materials', params: {
-          tag: 'material_create_url_only_response',
-          url: 'https://example.com/material-source'
-        }
-
-        expect(response).to have_http_status(:created)
-        expect(json['url']).to eq('https://example.com/material-source')
-      end
-    end
-  end
-
-  describe 'PUT /materials/:id' do
-    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
-
-    context 'when not logged in' do
-      before { sign_out }
-
-      it 'returns 401' do
-        put "/materials/#{ material.id }", params: {
-          tag: 'material_update_new',
-          file: dummy_upload(filename: 'new.png')
-        }
-
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in but not member' do
-      before { sign_in_as(guest_user) }
-
-      it 'returns 403' do
-        put "/materials/#{ material.id }", params: {
-          tag: 'material_update_new',
-          file: dummy_upload(filename: 'new.png')
-        }
-
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when member' do
-      before { sign_in_as(member_user) }
-
-      it 'returns 404 when material does not exist' do
-        put '/materials/999999999', params: {
-          tag: 'material_update_missing',
-          file: dummy_upload
-        }
-
-        expect(response).to have_http_status(:not_found)
-      end
-
-      it 'returns 400 when tag is blank' do
-        put "/materials/#{ material.id }", params: {
-          tag: '   ',
-          file: dummy_upload
-        }
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it 'returns 400 when both file and url are blank' do
-        put "/materials/#{ material.id }", params: {
-          tag: 'material_update_no_payload'
-        }
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it 'updates tag, url, file, and updated_by_user' do
-        old_blob_id = material.file.blob.id
-
-        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)
-
-        material.reload
-        expect(material.tag.name).to eq('material_update_new')
-        expect(material.tag.category).to eq('material')
-        expect(material.url).to eq('https://example.com/updated-source')
-        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(material.file.blob.filename.to_s).to eq('updated.jpg')
-        expect(material.file.blob.content_type).to eq('image/jpeg')
-
-        expect(json['id']).to eq(material.id)
-        expect(json['file']).to be_present
-        expect(json['content_type']).to eq('image/jpeg')
-        expect(json.dig('tag', 'name')).to eq('material_update_new')
-      end
-
-      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: {
-          tag: 'material_update_remove_file',
-          url: 'https://example.com/updated-source'
-        }
-
-        expect(response).to have_http_status(:ok)
-
-        material.reload
-        expect(material.tag.name).to eq('material_update_remove_file')
-        expect(material.url).to eq('https://example.com/updated-source')
-        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(false)
-
-        expect(json['id']).to eq(material.id)
-        expect(json['file']).to be_nil
-        expect(json['content_type']).to be_nil
-        expect(json.dig('tag', 'name')).to eq('material_update_remove_file')
-        expect(json['url']).to eq('https://example.com/updated-source')
-      end
-    end
-  end
-
-  describe 'DELETE /materials/:id' do
-    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
-
-    context 'when not logged in' do
-      before { sign_out }
-
-      it 'returns 401' do
-        delete "/materials/#{ material.id }"
-        expect(response).to have_http_status(:unauthorized)
-      end
-    end
-
-    context 'when logged in but not member' do
-      before { sign_in_as(guest_user) }
-
-      it 'returns 403' do
-        delete "/materials/#{ material.id }"
-        expect(response).to have_http_status(:forbidden)
-      end
-    end
-
-    context 'when member' do
-      before { sign_in_as(member_user) }
-
-      it 'returns 404 when material does not exist' do
-        delete '/materials/999999999'
-        expect(response).to have_http_status(:not_found)
-      end
-
-      it 'discards the material and returns 204' do
-        delete "/materials/#{ material.id }"
-
-        expect(response).to have_http_status(:no_content)
-        expect(Material.find_by(id: material.id)).to be_nil
-        expect(Material.with_discarded.find(material.id)).to be_discarded
-      end
-    end
-  end
-end

backend/spec/requests/tags_spec.rb

@@ -19,17 +19,6 @@ RSpec.describe 'Tags API', type: :request do
     response_tags.map { |t| t.fetch('name') }
   end
 
-  def dummy_material_upload(filename: 'dummy.png', type: 'image/png', body: 'dummy')
-    Rack::Test::UploadedFile.new(StringIO.new(body), type, original_filename: filename)
-  end
-
-  def create_material(tag, user:, filename: 'dummy.png', type: 'image/png', url: nil)
-    Material.new(tag:, url:, created_by_user: user, updated_by_user: user).tap do |material|
-      material.file.attach(dummy_material_upload(filename:, type:)) if filename
-      material.save!
-    end
-  end
-
   describe 'GET /tags' do
     it 'returns tags with count and metadata' do
       get '/tags'
@@ -370,144 +359,4 @@ RSpec.describe 'Tags API', type: :request do
       end
     end
   end
-
-  describe 'GET /tags/with-depth' do
-    let!(:root_meme) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_a_root_meme'), category: :meme)
-    end
-
-    let!(:root_material) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_b_root_material'), category: :material)
-    end
-
-    let!(:hidden_general_root) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_hidden_general_root'), category: :general)
-    end
-
-    let!(:child_character) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_child_character'), category: :character)
-    end
-
-    let!(:grandchild_material) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_grandchild_material'), category: :material)
-    end
-
-    let!(:child_general) do
-      Tag.create!(tag_name: TagName.create!(name: 'depth_child_general'), category: :general)
-    end
-
-    before do
-      TagImplication.create!(parent_tag: root_meme, tag: child_character)
-      TagImplication.create!(parent_tag: child_character, tag: grandchild_material)
-      TagImplication.create!(parent_tag: root_material, tag: child_general)
-    end
-
-    it 'returns only visible root tags and visible has_children flags' do
-      get '/tags/with-depth'
-
-      expect(response).to have_http_status(:ok)
-      expect(json.map { |t| t['name'] }).to eq([
-        'depth_a_root_meme',
-        'depth_b_root_material'
-      ])
-
-      meme_row = json.find { |t| t['name'] == 'depth_a_root_meme' }
-      material_row = json.find { |t| t['name'] == 'depth_b_root_material' }
-
-      expect(meme_row['has_children']).to eq(true)
-      expect(meme_row['children']).to eq([])
-
-      expect(material_row['has_children']).to eq(false)
-      expect(material_row['children']).to eq([])
-
-      expect(json.map { |t| t['name'] }).not_to include('depth_hidden_general_root')
-    end
-
-    it 'returns children of the specified parent' do
-      get '/tags/with-depth', params: { parent: root_meme.id }
-
-      expect(response).to have_http_status(:ok)
-      expect(json.map { |t| t['name'] }).to eq(['depth_child_character'])
-
-      row = json.first
-      expect(row['category']).to eq('character')
-      expect(row['has_children']).to eq(true)
-      expect(row['children']).to eq([])
-    end
-  end
-
-  describe 'GET /tags/name/:name/materials' do
-    let!(:material_user) { create_member_user! }
-
-    let!(:root_tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'materials_root'), category: :material)
-    end
-
-    let!(:child_a_tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'materials_child_a'), category: :material)
-    end
-
-    let!(:child_b_tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'materials_child_b'), category: :character)
-    end
-
-    let!(:grandchild_tag) do
-      Tag.create!(tag_name: TagName.create!(name: 'materials_grandchild'), category: :material)
-    end
-
-    let!(:root_material) do
-      create_material(root_tag, user: material_user, filename: 'root.png')
-    end
-
-    let!(:child_a_material) do
-      create_material(child_a_tag, user: material_user, filename: 'child_a.png')
-    end
-
-    let!(:grandchild_material) do
-      create_material(grandchild_tag, user: material_user, filename: 'grandchild.png')
-    end
-
-    before do
-      TagImplication.create!(parent_tag: root_tag, tag: child_b_tag)
-      TagImplication.create!(parent_tag: root_tag, tag: child_a_tag)
-      TagImplication.create!(parent_tag: child_a_tag, tag: grandchild_tag)
-    end
-
-    it 'returns a tag tree with nested materials sorted by child name' do
-      get "/tags/name/#{ CGI.escape(root_tag.name) }/materials"
-
-      expect(response).to have_http_status(:ok)
-
-      expect(json).to include(
-        'id' => root_tag.id,
-        'name' => 'materials_root',
-        'category' => 'material'
-      )
-
-      expect(json['material']).to be_present
-      expect(json.dig('material', 'id')).to eq(root_material.id)
-      expect(json.dig('material', 'file')).to be_present
-      expect(json.dig('material', 'content_type')).to eq('image/png')
-
-      expect(json['children'].map { |t| t['name'] }).to eq([
-        'materials_child_a',
-        'materials_child_b'
-      ])
-
-      child_a = json['children'].find { |t| t['name'] == 'materials_child_a' }
-      child_b = json['children'].find { |t| t['name'] == 'materials_child_b' }
-
-      expect(child_a.dig('material', 'id')).to eq(child_a_material.id)
-      expect(child_a['children'].map { |t| t['name'] }).to eq(['materials_grandchild'])
-      expect(child_a.dig('children', 0, 'material', 'id')).to eq(grandchild_material.id)
-
-      expect(child_b['material']).to be_nil
-      expect(child_b['children']).to eq([])
-    end
-
-    it 'returns 404 when the tag does not exist' do
-      get '/tags/name/no_such_tag_12345/materials'
-      expect(response).to have_http_status(:not_found)
-    end
-  end
 end

backend/spec/requests/theatre_comments_spec.rb

@@ -1,150 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe 'TheatreComments', type: :request do
-  def sign_in_as(user)
-    allow_any_instance_of(ApplicationController).to receive(:current_user).and_return(user)
-  end
-
-  describe 'GET /theatres/:theatre_id/comments' do
-    let(:theatre) { create(:theatre) }
-    let(:other_theatre) { create(:theatre) }
-    let(:alice) { create(:user, name: 'Alice') }
-    let(:bob) { create(:user, name: 'Bob') }
-
-    let!(:comment_3) do
-      create(
-        :theatre_comment,
-        theatre: theatre,
-        no: 3,
-        user: alice,
-        content: 'third comment'
-      )
-    end
-
-    let!(:comment_1) do
-      create(
-        :theatre_comment,
-        theatre: theatre,
-        no: 1,
-        user: alice,
-        content: 'first comment'
-      )
-    end
-
-    let!(:comment_2) do
-      create(
-        :theatre_comment,
-        theatre: theatre,
-        no: 2,
-        user: bob,
-        content: 'second comment'
-      )
-    end
-
-    let!(:other_comment) do
-      create(
-        :theatre_comment,
-        theatre: other_theatre,
-        no: 1,
-        user: bob,
-        content: 'other theatre comment'
-      )
-    end
-
-    it 'theatre_id で絞り込み、no_gt より大きいものを no 降順で返す' do
-      get "/theatres/#{theatre.id}/comments", params: { no_gt: 1 }
-
-      expect(response).to have_http_status(:ok)
-      expect(response.parsed_body.map { |row| row['no'] }).to eq([3, 2])
-      expect(response.parsed_body.map { |row| row['content'] }).to eq([
-        'third comment',
-        'second comment'
-      ])
-    end
-
-    it 'user は id と name だけを含む' do
-      get "/theatres/#{theatre.id}/comments", params: { no_gt: 1 }
-
-      expect(response).to have_http_status(:ok)
-
-      expect(response.parsed_body.first['user']).to eq({
-        'id' => alice.id,
-        'name' => 'Alice'
-      })
-      expect(response.parsed_body.first['user'].keys).to contain_exactly('id', 'name')
-    end
-
-    it 'no_gt が負数なら 0 として扱う' do
-      get "/theatres/#{theatre.id}/comments", params: { no_gt: -100 }
-
-      expect(response).to have_http_status(:ok)
-      expect(response.parsed_body.map { |row| row['no'] }).to eq([3, 2, 1])
-    end
-  end
-
-  describe 'POST /theatres/:theatre_id/comments' do
-    let(:user) { create(:user, name: 'Alice') }
-    let(:theatre) { create(:theatre, next_comment_no: 2) }
-
-    before do
-      create(
-        :theatre_comment,
-        theatre: theatre,
-        no: 1,
-        user: user,
-        content: 'existing comment'
-      )
-    end
-
-    it '未ログインなら 401 を返す' do
-      expect {
-        post "/theatres/#{theatre.id}/comments", params: { content: 'hello' }
-      }.not_to change(TheatreComment, :count)
-
-      expect(response).to have_http_status(:unauthorized)
-    end
-
-    it 'content が blank なら 422 を返す' do
-      sign_in_as(user)
-
-      expect {
-        post "/theatres/#{theatre.id}/comments", params: { content: '   ' }
-      }.not_to change(TheatreComment, :count)
-
-      expect(response).to have_http_status(:unprocessable_entity)
-    end
-
-    it 'theatre が存在しなければ 404 を返す' do
-      sign_in_as(user)
-
-      expect {
-        post '/theatres/999999/comments', params: { content: 'hello' }
-      }.not_to change(TheatreComment, :count)
-
-      expect(response).to have_http_status(:not_found)
-    end
-
-    it 'コメントを作成し、user を紐づけ、next_comment_no を進める' do
-      sign_in_as(user)
-
-      expect {
-        post "/theatres/#{theatre.id}/comments", params: { content: 'new comment' }
-      }.to change(TheatreComment, :count).by(1)
-
-      expect(response).to have_http_status(:created)
-
-      comment = TheatreComment.find_by!(theatre: theatre, no: 2)
-
-      expect(comment.user).to eq(user)
-      expect(comment.content).to eq('new comment')
-      expect(theatre.reload.next_comment_no).to eq(3)
-
-      expect(response.parsed_body.slice('theatre_id', 'no', 'user_id', 'content')).to eq({
-        'theatre_id' => theatre.id,
-        'no' => 2,
-        'user_id' => user.id,
-        'content' => 'new comment'
-      })
-    end
-  end
-end

backend/spec/requests/theatres_spec.rb

@@ -117,18 +117,11 @@ RSpec.describe 'Theatres API', type: :request do
         expect(theatre.host_user_id).to eq(member.id)
         expect(watch.expires_at).to be_within(1.second).of(30.seconds.from_now)
 
-        expect(json).to include(
+        expect(json).to eq(
           'host_flg' => true,
           'post_id' => nil,
           'post_started_at' => nil
         )
-
-        expect(json.fetch('watching_users')).to contain_exactly(
-          {
-            'id' => member.id,
-            'name' => 'member user'
-          }
-        )
       end
     end
 
@@ -174,22 +167,11 @@ RSpec.describe 'Theatres API', type: :request do
         expect(response).to have_http_status(:ok)
         expect(theatre.reload.host_user_id).to eq(other_user.id)
 
-        expect(json).to include(
+        expect(json).to eq(
           'host_flg' => false,
           'post_id' => nil,
           'post_started_at' => nil
         )
-
-        expect(json.fetch('watching_users')).to contain_exactly(
-          {
-            'id' => member.id,
-            'name' => 'member user'
-          },
-          {
-            'id' => other_user.id,
-            'name' => 'other user'
-          }
-        )
       end
     end
 

frontend/src/App.tsx

@@ -10,11 +10,6 @@ import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
 import { Toaster } from '@/components/ui/toaster'
 import { apiPost, isApiError } from '@/lib/api'
-import MaterialBasePage from '@/pages/materials/MaterialBasePage'
-import MaterialDetailPage from '@/pages/materials/MaterialDetailPage'
-import MaterialListPage from '@/pages/materials/MaterialListPage'
-import MaterialNewPage from '@/pages/materials/MaterialNewPage'
-// import MaterialSearchPage from '@/pages/materials/MaterialSearchPage'
 import NicoTagListPage from '@/pages/tags/NicoTagListPage'
 import NotFound from '@/pages/NotFound'
 import PostDetailPage from '@/pages/posts/PostDetailPage'
@@ -46,7 +41,7 @@ const RouteTransitionWrapper = ({ user, setUser }: {
   return (
       <LayoutGroup id="gallery-shared">
 	<AnimatePresence mode="wait">
-	  <Routes location={location}>
+	  <Routes location={location} key={location.pathname}>
 	    <Route path="/" element={<Navigate to="/posts" replace/>}/>
 	    <Route path="/posts" element={<PostListPage/>}/>
 	    <Route path="/posts/new" element={<PostNewPage user={user}/>}/>
@@ -56,12 +51,6 @@ const RouteTransitionWrapper = ({ user, setUser }: {
 	    <Route path="/tags" element={<TagListPage/>}/>
 	    <Route path="/tags/nico" element={<NicoTagListPage user={user}/>}/>
 	    <Route path="/theatres/:id" element={<TheatreDetailPage/>}/>
-	    <Route path="/materials" element={<MaterialBasePage/>}>
-	      <Route index element={<MaterialListPage/>}/>
-	      <Route path="new" element={<MaterialNewPage/>}/>
-	      <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}/>}/>
@@ -131,7 +120,7 @@ export default (() => {
       <>
 	<RouteBlockerOverlay/>
 	<BrowserRouter>
-	  <div className="flex flex-col h-dvh w-screen">
+	  <div className="flex flex-col h-screen w-screen">
 	    <TopNav user={user}/>
 	    <RouteTransitionWrapper user={user} setUser={setUser}/>
 	  </div>

frontend/src/components/MaterialSidebar.tsx

@@ -1,97 +0,0 @@
-import { Fragment, useEffect, useState } from 'react'
-
-import TagLink from '@/components/TagLink'
-import SidebarComponent from '@/components/layout/SidebarComponent'
-import { apiGet } from '@/lib/api'
-
-import type { FC, ReactNode } from 'react'
-
-import type { Tag } from '@/types'
-
-type TagWithDepth = Tag & {
-    hasChildren:  boolean
-    children:     TagWithDepth[] }
-
-
-const setChildrenById = (
-    tags:     TagWithDepth[],
-    targetId: number,
-    children: TagWithDepth[],
-): TagWithDepth[] => (
-    tags.map (tag => {
-      if (tag.id === targetId)
-	return { ...tag, children }
-
-      if (tag.children.length === 0)
-	return tag
-
-      return { ...tag,
-	       children: (setChildrenById (tag.children, targetId, children)
-			  .filter (t => t.category !== 'meme' || t.hasChildren)) }
-    }))
-
-
-export default (() => {
-  const [tags, setTags] = useState<TagWithDepth[]> ([])
-  const [openTags, setOpenTags] = useState<Record<number, boolean>> ({ })
-  const [tagFetchedFlags, setTagFetchedFlags] = useState<Record<number, boolean>> ({ })
-
-  useEffect (() => {
-    void (async () => {
-      setTags ((await apiGet<TagWithDepth[]> ('/tags/with-depth'))
-	       .filter (t => t.category !== 'meme' || t.hasChildren))
-    }) ()
-  }, [])
-
-  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>
-	    </li>
-	    {openTags[t.id] && renderTags (t.children, nestLevel + 1)}
-	  </Fragment>)))
-
-  return (
-      <SidebarComponent>
-	<ul>
-	  {renderTags (tags)}
-	</ul>
-      </SidebarComponent>)
-}) satisfies FC

frontend/src/components/PrefetchLink.tsx

@@ -71,8 +71,7 @@ export default forwardRef<HTMLAnchorElement, Props> (({
 	  || ev.metaKey
 	  || ev.ctrlKey
 	  || ev.shiftKey
-	  || ev.altKey
-	  || (rest.target && rest.target !== '_self'))
+	  || ev.altKey)
 	return
 
       ev.preventDefault ()

frontend/src/components/TagLink.tsx

@@ -1,5 +1,8 @@
+import { useEffect, useState } from 'react'
+
 import PrefetchLink from '@/components/PrefetchLink'
 import { LIGHT_COLOUR_SHADE, DARK_COLOUR_SHADE, TAG_COLOUR } from '@/consts'
+import { apiGet } from '@/lib/api'
 import { cn } from '@/lib/utils'
 
 import type { ComponentProps, FC, HTMLAttributes } from 'react'
@@ -10,7 +13,8 @@ type CommonProps = {
     tag:        Tag
     nestLevel?: number
     withWiki?:  boolean
-    withCount?: boolean }
+    withCount?: boolean
+    prefetch?:  boolean }
 
 type PropsWithLink =
     & CommonProps
@@ -32,7 +36,37 @@ export default (({ tag,
 		   linkFlg   = true,
 		   withWiki  = true,
 		   withCount = true,
+		   prefetch  = false,
 		   ...props }: Props) => {
+  const [havingWiki, setHavingWiki] = useState (true)
+
+  const wikiExists = async (tag: Tag) => {
+    if ('hasWiki' in tag)
+      {
+	setHavingWiki (tag.hasWiki)
+	return
+      }
+
+    const tagName = (tag as Tag).name
+
+    try
+    {
+      await apiGet (`/wiki/title/${ encodeURIComponent (tagName) }/exists`)
+      setHavingWiki (true)
+    }
+    catch
+    {
+      setHavingWiki (false)
+    }
+  }
+
+  useEffect (() => {
+    if (!(linkFlg) || !(withWiki))
+      return
+
+    wikiExists (tag)
+  }, [tag.name, linkFlg, withWiki])
+
   const spanClass = cn (
       `text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE }`,
       `dark:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE }`)
@@ -45,39 +79,19 @@ export default (({ tag,
       <>
 	{(linkFlg && withWiki) && (
 	    <span className="mr-1">
-	      {(tag.materialId != null || tag.hasWiki)
+	      {havingWiki
 	       ? (
-		  tag.materialId == null
-		  ? (
-		      <PrefetchLink
-			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
-			  className={linkClass}>
-			?
-		      </PrefetchLink>)
-		  : (
-		      <PrefetchLink
-			  to={`/materials/${ tag.materialId }`}
-			  className={linkClass}>
-			?
-		      </PrefetchLink>))
+		  <PrefetchLink to={`/wiki/${ encodeURIComponent (tag.name) }`}
+			className={linkClass}>
+		    ?
+		  </PrefetchLink>)
 	       : (
-		  ['character', 'material'].includes (tag.category)
-		  ? (
-		      <PrefetchLink
-			  to={`/materials/new?tag=${ encodeURIComponent (tag.name) }`}
-			  className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-				     dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			  title={`${ tag.name } 素材情報が存在しません．`}>
-			!
-		      </PrefetchLink>)
-		  : (
-		      <PrefetchLink
-			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
-			  className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
-				     dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
-			  title={`${ tag.name } Wiki が存在しません．`}>
-			!
-		      </PrefetchLink>))}
+		  <PrefetchLink to={`/wiki/${ encodeURIComponent (tag.name) }`}
+			className="animate-[wiki-blink_.25s_steps(2,end)_infinite]
+				   dark:animate-[wiki-blink-dark_.25s_steps(2,end)_infinite]"
+			title={`${ tag.name } Wiki が存在しません．`}>
+		    !
+		  </PrefetchLink>)}
 	    </span>)}
 	{nestLevel > 0 && (
 	    <span
@@ -94,12 +108,19 @@ export default (({ tag,
 	    </>)}
 	{linkFlg
 	 ? (
-	    <PrefetchLink
-		to={`/posts?${ (new URLSearchParams ({ tags: tag.name })).toString () }`}
-		className={linkClass}
-		{...props}>
-	      {tag.name}
-	    </PrefetchLink>)
+	    prefetch
+	    ? <PrefetchLink
+		  to={`/posts?${ (new URLSearchParams ({ tags: tag.name })).toString () }`}
+		  className={linkClass}
+		  {...props}>
+		{tag.name}
+	      </PrefetchLink>
+	    : <PrefetchLink
+		  to={`/posts?${ (new URLSearchParams ({ tags: tag.name })).toString () }`}
+		  className={linkClass}
+		  {...props}>
+		{tag.name}
+	      </PrefetchLink>)
 	 : (
 	    <span className={spanClass}
 		  {...props}>

frontend/src/components/TagSidebar.tsx

@@ -66,7 +66,7 @@ export default (({ posts, onClick }: Props) => {
 	      tags[cat].map (tag => (
 		  <li key={tag.id} className="mb-1">
 		    <motion.div layoutId={`tag-${ tag.id }`}>
-		      <TagLink tag={tag} onClick={onClick}/>
+		      <TagLink tag={tag} prefetch onClick={onClick}/>
 		    </motion.div>
 		  </li>))) : [])}
 	</ul>

frontend/src/components/TopNav.tsx

@@ -70,27 +70,18 @@ export default (({ user }: Props) => {
       { name: '広場', to: '/posts', subMenu: [
 	  { name: '一覧', to: '/posts' },
 	  { name: '検索', to: '/posts/search' },
-	  { name: '追加', to: '/posts/new' },
+	  { name: '投稿追加', to: '/posts/new' },
 	  { name: '履歴', to: '/posts/changes' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:広場' }] },
       { name: 'タグ', to: '/tags', subMenu: [
-	  { name: 'マスタ', to: '/tags' },
+	  { name: 'タグ一覧', to: '/tags', visible: true },
 	  { name: '別名タグ', to: '/tags/aliases', visible: false },
 	  { name: '上位タグ', to: '/tags/implications', visible: false },
 	  { name: 'ニコニコ連携', to: '/tags/nico' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' }] },
-      { name: '素材', to: '/materials', subMenu: [
-	  { name: '一覧', to: '/materials' },
-	  // { name: '検索', to: '/materials/search' }, 
-	  { name: '追加', to: '/materials/new' },
-	  // { name: '履歴', to: '/materials/changes' },
-	  { name: 'ヘルプ', to: 'wiki/ヘルプ:素材集' }] },
-      { name: '上映会', to: '/theatres/1', base: '/theatres', subMenu: [
-          { name: <>第&thinsp;1&thinsp;会場</>, to: '/theatres/1' },
-          { name: 'CyTube', to: '//cytube.mm428.net/r/deernijika' },
-	  { name: <>ニジカ放送局第&thinsp;1&thinsp;チャンネル</>,
-	    to: '//www.youtube.com/watch?v=DCU3hL4Uu6A' },
-	  { name: 'ヘルプ', to: '/wiki/ヘルプ:上映会' }] },
+      // TODO: 本実装時に消す．
+      // { name: '上映会', to: '/theatres/1', base: '/theatres', subMenu: [
+      //     { name: '一覧', to: '/theatres' }] },
       { name: 'Wiki', to: '/wiki/ヘルプ:ホーム', base: '/wiki', subMenu: [
 	  { name: '検索', to: '/wiki' },
 	  { name: '新規', to: '/wiki/new' },
@@ -101,7 +92,7 @@ export default (({ user }: Props) => {
 	    visible: wikiPageFlg },
 	  { name: '履歴', to: `/wiki/changes?id=${ wikiId }`, visible: wikiPageFlg },
 	  { name: '編輯', to: `/wiki/${ wikiId || wikiTitle }/edit`, visible: wikiPageFlg }] },
-      { name: 'ユーザ', to: '/users/settings', subMenu: [
+      { name: 'ユーザ', to: '/users', subMenu: [
 	  { name: '一覧', to: '/users', visible: false },
 	  { name: 'お前', to: `/users/${ user?.id }`, visible: false },
 	  { name: '設定', to: '/users/settings', visible: Boolean (user) }] }]
@@ -218,7 +209,6 @@ export default (({ user }: Props) => {
 		      <PrefetchLink
 			  key={`l-${ i }`}
 			  to={item.to}
-			  target={item.to.slice (0, 2) === '//' ? '_blank' : undefined}
 			  className="h-full flex items-center px-3">
 			{item.name}
 		      </PrefetchLink>)))}
@@ -285,9 +275,6 @@ export default (({ user }: Props) => {
 				      <PrefetchLink
 					  key={`sp-l-${ i }-${ j }`}
 					  to={subItem.to}
-					  target={subItem.to.slice (0, 2) === '//'
-						  ? '_blank'
-						  : undefined}
 					  className="w-full min-h-[36px] flex items-center pl-12">
 					{subItem.name}
 				      </PrefetchLink>)))}

frontend/src/components/common/TagInput.tsx

@@ -1,97 +0,0 @@
-import { useState } from 'react'
-
-import TagSearchBox from '@/components/TagSearchBox'
-import { apiGet } from '@/lib/api'
-
-import type { FC, ChangeEvent, KeyboardEvent } from 'react'
-
-import type { Tag } from '@/types'
-
-
-type Props = {
-    value:      string
-    setValue:   (value: string) => void }
-
-export default (({ value, setValue }: Props) => {
-  const [activeIndex, setActiveIndex] = useState (-1)
-  const [suggestions, setSuggestions] = useState<Tag[]> ([])
-  const [suggestionsVsbl, setSuggestionsVsbl] = useState (false)
-
-  // TODO: TagSearch からのコピペのため，共通化を考へる．
-  const whenChanged = async (ev: ChangeEvent<HTMLInputElement>) => {
-    setValue (ev.target.value)
-
-    const q = ev.target.value.trim ().split (' ').at (-1)
-    if (!(q))
-      {
-	setSuggestions ([])
-	return
-      }
-
-    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: { q } })
-    setSuggestions (data.filter (t => t.postCount > 0))
-    if (suggestions.length > 0)
-      setSuggestionsVsbl (true)
-  }
-
-  // TODO: TagSearch からのコピペのため，共通化を考へる．
-  const handleTagSelect = (tag: Tag) => {
-    const parts = value?.split (' ')
-    parts[parts.length - 1] = tag.name
-    setValue (parts.join (' ') + ' ')
-    setSuggestions ([])
-    setActiveIndex (-1)
-  }
-
-  // TODO: TagSearch からのコピペのため，共通化を考へる．
-  const handleKeyDown = (ev: KeyboardEvent<HTMLInputElement>) => {
-    switch (ev.key)
-    {
-    case 'ArrowDown':
-      ev.preventDefault ()
-      setActiveIndex (i => Math.min (i + 1, suggestions.length - 1))
-      setSuggestionsVsbl (true)
-      break
-
-    case 'ArrowUp':
-      ev.preventDefault ()
-      setActiveIndex (i => Math.max (i - 1, -1))
-      setSuggestionsVsbl (true)
-      break
-
-    case 'Enter':
-      if (activeIndex < 0)
-	break
-      ev.preventDefault ()
-      const selected = suggestions[activeIndex]
-      selected && handleTagSelect (selected)
-      break
-
-    case 'Escape':
-      ev.preventDefault ()
-      setSuggestionsVsbl (false)
-      break
-    }
-    if (ev.key === 'Enter' && (!(suggestionsVsbl) || activeIndex < 0))
-      {
-	setSuggestionsVsbl (false)
-      }
-  }
-
-  return (
-      <div className="relative">
-	<input
-	    type="text"
-	    value={value}
-	    onChange={whenChanged}
-	    onFocus={() => setSuggestionsVsbl (true)}
-	    onBlur={() => setSuggestionsVsbl (false)}
-	    onKeyDown={handleKeyDown}
-	    className="w-full border p-2 rounded"/>
-	<TagSearchBox
-	    suggestions={
-		suggestionsVsbl && suggestions.length > 0 ? suggestions : [] as Tag[]}
-	    activeIndex={activeIndex}
-	    onSelect={handleTagSelect}/>
-      </div>)
-}) satisfies FC<Props>

frontend/src/components/layout/MainArea.tsx

@@ -8,8 +8,6 @@ type Props = {
 
 
 export default (({ children, className }: Props) => (
-    <main className={cn ('flex-1 overflow-y-auto p-4',
-			 'md:h-[calc(100dvh-88px)] md:overflow-y-auto',
-			 className)}>
+    <main className={cn ('flex-1 overflow-y-auto p-4', className)}>
       {children}
     </main>)) satisfies FC<Props>

frontend/src/components/layout/SidebarComponent.tsx

@@ -1,29 +1,9 @@
-import { Helmet } from 'react-helmet-async'
+import React from 'react'
 
-import type { FC, ReactNode } from 'react'
-
-type Props = { children: ReactNode }
+type Props = { children: React.ReactNode }
 
 
-export default (({ children }: Props) => (
-    <div
-	className="p-4 w-full md:w-64 md:h-full
-		   md:h-[calc(100dvh-88px)] md:overflow-y-auto
-		   sidebar">
-      <Helmet>
-	<style>
-	  {`
-	      .sidebar
-	      {
-		direction: rtl;
-	      }
-
-	      .sidebar > *
-	      {
-		direction: ltr;
-	      }`}
-	</style>
-      </Helmet>
-
+export default ({ children }: Props) => (
+    <div className="p-4 w-full md:w-64 md:h-full">
       {children}
-    </div>)) satisfies FC<Props>
+    </div>)

frontend/src/pages/materials/MaterialBasePage.tsx

@@ -1,12 +0,0 @@
-import { Outlet } from 'react-router-dom'
-
-import MaterialSidebar from '@/components/MaterialSidebar'
-
-import type { FC } from 'react'
-
-
-export default (() => (
-    <div className="md:flex md:flex-1 md:h-[calc(100dvh-88px)]">
-      <MaterialSidebar/>
-      <Outlet/>
-    </div>)) satisfies FC

frontend/src/pages/materials/MaterialDetailPage.tsx

@@ -1,182 +0,0 @@
-import { useEffect, useState } from 'react'
-import { Helmet } from 'react-helmet-async'
-import { useParams } from 'react-router-dom'
-
-import TagLink from '@/components/TagLink'
-import WikiBody from '@/components/WikiBody'
-import Label from '@/components/common/Label'
-import PageTitle from '@/components/common/PageTitle'
-import TabGroup, { Tab } from '@/components/common/TabGroup'
-import TagInput from '@/components/common/TagInput'
-import MainArea from '@/components/layout/MainArea'
-import { Button } from '@/components/ui/button'
-import { toast } from '@/components/ui/use-toast'
-import { SITE_TITLE } from '@/config'
-import { apiGet, apiPut } from '@/lib/api'
-
-import type { FC } from 'react'
-
-import type { Material, Tag } from '@/types'
-
-type MaterialWithTag = Material & { tag: Tag }
-
-
-export default (() => {
-  const { id } = useParams ()
-
-  const [file, setFile] = useState<File | null> (null)
-  const [filePreview, setFilePreview] = useState ('')
-  const [loading, setLoading] = useState (false)
-  const [material, setMaterial] = useState<MaterialWithTag | null> (null)
-  const [sending, setSending] = useState (false)
-  const [tag, setTag] = useState ('')
-  const [url, setURL] = useState ('')
-
-  const handleSubmit = async () => {
-    const formData = new FormData
-    if (tag.trim ())
-      formData.append ('tag', tag)
-    if (file)
-      formData.append ('file', file)
-    if (url.trim ())
-      formData.append ('url', url)
-
-    try
-    {
-      setSending (true)
-      const data = await apiPut<Material> (`/materials/${ id }`, formData)
-      setMaterial (data)
-      toast ({ title: '更新成功!' })
-    }
-    catch
-    {
-      toast ({ title: '更新失敗……', description: '入力を見直してください．' })
-    }
-    finally
-    {
-      setSending (false)
-    }
-  }
-
-  useEffect (() => {
-    if (!(id))
-      return
-
-    void (async () => {
-      try
-      {
-	setLoading (true)
-	const data = await apiGet<MaterialWithTag> (`/materials/${ id }`)
-	setMaterial (data)
-	setTag (data.tag.name)
-	if (data.file && data.contentType)
-	  {
-	    setFilePreview (data.file)
-	    setFile (new File ([await (await fetch (data.file)).blob ()],
-			       data.file,
-			       { type: data.contentType }))
-	  }
-	setURL (data.url ?? '')
-      }
-      finally
-      {
-	setLoading (false)
-      }
-    }) ()
-  }, [id])
-
-  return (
-      <MainArea>
-	{material && (
-	    <Helmet>
-	      <title>{`${ material.tag.name } 素材照会 | ${ SITE_TITLE }`}</title>
-	    </Helmet>)}
-
-	{loading ? 'Loading...' : (material && (
-	    <>
-	      <PageTitle>
-		<TagLink
-		    tag={material.tag}
-		    withWiki={false}
-		    withCount={false}/>
-	      </PageTitle>
-
-	      {(material.file && material.contentType) && (
-		  (/image\/.*/.test (material.contentType) && (
-		      <img src={material.file} alt={material.tag.name || undefined}/>))
-		  || (/video\/.*/.test (material.contentType) && (
-		      <video src={material.file} controls/>))
-		  || (/audio\/.*/.test (material.contentType) && (
-		      <audio src={material.file} controls/>)))}
-
-	      <TabGroup>
-		<Tab name="Wiki">
-		  <WikiBody
-		      title={material.tag.name}
-		      body={material.wikiPageBody ?? undefined}/>
-		</Tab>
-
-		<Tab name="編輯">
-		  <div className="max-w-wl pt-2 space-y-4">
-		    {/* タグ */}
-		    <div>
-		      <Label>タグ</Label>
-		      <TagInput value={tag} setValue={setTag}/>
-		    </div>
-
-		    {/* ファイル */}
-		    <div>
-		      <Label>ファイル</Label>
-		      <input
-			  type="file"
-			  accept="image/*,video/*,audio/*"
-			  onChange={e => {
-			    const f = e.target.files?.[0]
-			    setFile (f ?? null)
-			    setFilePreview (f ? URL.createObjectURL (f) : '')
-			  }}/>
-		      {(file && filePreview) && (
-			  (/image\/.*/.test (file.type) && (
-			      <img
-				  src={filePreview}
-				  alt="preview"
-				  className="mt-2 max-h-48 rounded border"/>))
-			  || (/video\/.*/.test (file.type) && (
-			      <video
-				  src={filePreview}
-				  controls
-				  className="mt-2 max-h-48 rounded border"/>))
-			  || (/audio\/.*/.test (file.type) && (
-			      <audio
-				  src={filePreview}
-				  controls
-				  className="mt-2 max-h-48"/>))
-			  || (
-			      <p className="text-red-600 dark:text-red-400">
-				その形式のファイルには対応していません．
-			      </p>))}
-		    </div>
-
-		    {/* 参考 URL */}
-		    <div>
-		      <Label>参考 URL</Label>
-		      <input
-			  type="url"
-			  value={url}
-			  onChange={e => setURL (e.target.value)}
-			  className="w-full border p-2 rounded"/>
-		    </div>
-
-		    {/* 送信 */}
-		    <Button
-			onClick={handleSubmit}
-			className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400"
-			disabled={sending}>
-		      更新
-		    </Button>
-		  </div>
-		</Tab>
-	      </TabGroup>
-	    </>))}
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/materials/MaterialListPage.tsx

@@ -1,166 +0,0 @@
-import { Fragment, useEffect, useState } from 'react'
-import { Helmet } from 'react-helmet-async'
-import { useLocation } from 'react-router-dom'
-
-import nikumaru from '@/assets/fonts/nikumaru.otf'
-import PrefetchLink from '@/components/PrefetchLink'
-import TagLink from '@/components/TagLink'
-import PageTitle from '@/components/common/PageTitle'
-import SectionTitle from '@/components/common/SectionTitle'
-import SubsectionTitle from '@/components/common/SubsectionTitle'
-import MainArea from '@/components/layout/MainArea'
-import { SITE_TITLE } from '@/config'
-import { apiGet } from '@/lib/api'
-
-import type { FC } from 'react'
-
-import type { Material, Tag } from '@/types'
-
-type TagWithMaterial = Omit<Tag, 'children'> & {
-    children: TagWithMaterial[]
-    material: Material | null }
-
-
-const MaterialCard = ({ tag }: { tag: TagWithMaterial }) => {
-  if (!(tag.material))
-    return
-
-  return (
-      <PrefetchLink
-	  to={`/materials/${ tag.material.id }`}
-	  className="block w-40 h-40">
-	<div
-	    className="w-full h-full overflow-hidden rounded-xl shadow
-		       text-center content-center text-4xl"
-	    style={{ fontFamily: 'Nikumaru' }}>
-	  {(tag.material.contentType && /image\/.*/.test (tag.material.contentType))
-	   ? <img src={tag.material.file || undefined}/>
-	   : <span>照会</span>}
-	</div>
-      </PrefetchLink>)
-}
-
-
-export default (() => {
-  const [loading, setLoading] = useState (false)
-  const [tag, setTag] = useState<TagWithMaterial | null> (null)
-
-  const location = useLocation ()
-  const query = new URLSearchParams (location.search)
-  const tagQuery = query.get ('tag') ?? ''
-
-  useEffect (() => {
-    if (!(tagQuery))
-      {
-	setTag (null)
-	return
-      }
-
-    void (async () => {
-      try
-      {
-	setLoading (true)
-	setTag (
-	    await apiGet<TagWithMaterial> (
-		`/tags/name/${ encodeURIComponent (tagQuery) }/materials`))
-      }
-      finally
-      {
-	setLoading (false)
-      }
-    }) ()
-  }, [location.search])
-
-  return (
-      <MainArea>
-	<Helmet>
-	  <style>
-	    {`
-		@font-face
-		{
-		  font-family: 'Nikumaru';
-		  src: url(${ nikumaru }) format('opentype');
-		}`}
-	  </style>
-	  <title>{`${ tag ? `${ tag.name } 素材集` : '素材集' } | ${ SITE_TITLE }`}</title>
-	</Helmet>
-
-	{loading ? 'Loading...' : (
-	    tag
-	    ? (
-		<>
-		  <PageTitle>
-		    <TagLink
-			tag={tag}
-			withWiki={false}
-			withCount={false}
-			to={tag.material
-			    ? `/materials/${ tag.material.id }`
-			    : `/materials?tag=${ encodeURIComponent (tag.name) }`}/>
-		  </PageTitle>
-		  {(!(tag.material) && tag.category !== 'meme') && (
-		      <div className="-mt-2">
-			<PrefetchLink
-			    to={`/materials/new?tag=${ encodeURIComponent (tag.name) }`}>
-			  追加
-			</PrefetchLink>
-		      </div>)}
-
-		  <MaterialCard tag={tag}/>
-
-		  <div className="ml-2">
-		    {tag.children.map (c2 => (
-			<Fragment key={c2.id}>
-			  <SectionTitle>
-			    <TagLink
-				tag={c2}
-				withWiki={false}
-				withCount={false}
-				to={`/materials?tag=${ encodeURIComponent (c2.name) }`}/>
-			  </SectionTitle>
-			  {(!(c2.material) && c2.category !== 'meme') && (
-			      <div className="-mt-4">
-				<PrefetchLink
-				    to={`/materials/new?tag=${ encodeURIComponent (c2.name) }`}>
-				  追加
-				</PrefetchLink>
-			      </div>)}
-
-			  <MaterialCard tag={c2}/>
-
-			  <div className="ml-2">
-			    {c2.children.map (c3 => (
-				<Fragment key={c3.id}>
-				  <SubsectionTitle>
-				    <TagLink
-					tag={c3}
-					withWiki={false}
-					withCount={false}
-					to={`/materials?tag=${ encodeURIComponent (c3.name) }`}/>
-				  </SubsectionTitle>
-				  {(!(c3.material) && c3.category !== 'meme') && (
-				      <div className="-mt-2">
-					<PrefetchLink
-					    to={`/materials/new?tag=${
-						encodeURIComponent (c3.name) }`}>
-					  追加
-					</PrefetchLink>
-				      </div>)}
-
-				  <MaterialCard tag={c3}/>
-				</Fragment>))}
-			  </div>
-			</Fragment>))}
-		  </div>
-		</>)
-	    : (
-		<>
-		  <p>左のリストから照会したいタグを選択してください。</p>
-		  <p>もしくは……</p>
-		  <ul>
-		    <li><PrefetchLink to="/materials/new">素材を新規追加する</PrefetchLink></li>
-		    {/* <li><a href="#">すべての素材をダウンロードする</a></li> */}
-		  </ul>
-		</>))}
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/materials/MaterialNewPage.tsx

@@ -1,124 +0,0 @@
-import { useState } from 'react'
-import { Helmet } from 'react-helmet-async'
-import { useLocation, useNavigate } from 'react-router-dom'
-
-import Form from '@/components/common/Form'
-import Label from '@/components/common/Label'
-import PageTitle from '@/components/common/PageTitle'
-import TagInput from '@/components/common/TagInput'
-import MainArea from '@/components/layout/MainArea'
-import { Button } from '@/components/ui/button'
-import { toast } from '@/components/ui/use-toast'
-import { SITE_TITLE } from '@/config'
-import { apiPost } from '@/lib/api'
-
-import type { FC } from 'react'
-
-
-export default (() => {
-  const location = useLocation ()
-  const query = new URLSearchParams (location.search)
-  const tagQuery = query.get ('tag') ?? ''
-
-  const navigate = useNavigate ()
-
-  const [file, setFile] = useState<File | null> (null)
-  const [filePreview, setFilePreview] = useState ('')
-  const [sending, setSending] = useState (false)
-  const [tag, setTag] = useState (tagQuery)
-  const [url, setURL] = useState ('')
-
-  const handleSubmit = async () => {
-    const formData = new FormData
-    if (tag)
-      formData.append ('tag', tag)
-    if (file)
-      formData.append ('file', file)
-    if (url)
-      formData.append ('url', url)
-
-    try
-    {
-      setSending (true)
-      await apiPost ('/materials', formData)
-      toast ({ title: '送信成功!' })
-      navigate (`/materials?tag=${ encodeURIComponent (tag) }`)
-    }
-    catch
-    {
-      toast ({ title: '送信失敗……', description: '入力を見直してください．' })
-    }
-    finally
-    {
-      setSending (false)
-    }
-  }
-
-  return (
-      <MainArea>
-	<Helmet>
-	  <title>{`素材追加 | ${ SITE_TITLE }`}</title>
-	</Helmet>
-
-	<Form>
-	  <PageTitle>素材追加</PageTitle>
-
-	  {/* タグ */}
-	  <div>
-	    <Label>タグ</Label>
-	    <TagInput value={tag} setValue={setTag}/>
-	  </div>
-
-	  {/* ファイル */}
-	  <div>
-	    <Label>ファイル</Label>
-	    <input
-		type="file"
-		accept="image/*,video/*,audio/*"
-		onChange={e => {
-		  const f = e.target.files?.[0]
-		  setFile (f ?? null)
-		  setFilePreview (f ? URL.createObjectURL (f) : '')
-		}}/>
-	    {(file && filePreview) && (
-		(/image\/.*/.test (file.type) && (
-		    <img
-			src={filePreview}
-			alt="preview"
-			className="mt-2 max-h-48 rounded border"/>))
-		|| (/video\/.*/.test (file.type) && (
-		    <video
-			src={filePreview}
-			controls
-			className="mt-2 max-h-48 rounded border"/>))
-		|| (/audio\/.*/.test (file.type) && (
-		    <audio
-			src={filePreview}
-			controls
-			className="mt-2 max-h-48"/>))
-		|| (
-		    <p className="text-red-600 dark:text-red-400">
-		      その形式のファイルには対応していません．
-		    </p>))}
-	  </div>
-
-	  {/* 参考 URL */}
-	  <div>
-	    <Label>参考 URL</Label>
-	    <input
-		type="url"
-		value={url}
-		onChange={e => setURL (e.target.value)}
-		className="w-full border p-2 rounded"/>
-	  </div>
-
-	  {/* 送信 */}
-	  <Button
-	      onClick={handleSubmit}
-	      className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400"
-	      disabled={sending}>
-	    追加
-	  </Button>
-	</Form>
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/materials/MaterialSearchPage.tsx

@@ -1,49 +0,0 @@
-import { useState } from 'react'
-import { Helmet } from 'react-helmet-async'
-
-import Label from '@/components/common/Label'
-import PageTitle from '@/components/common/PageTitle'
-import TagInput from '@/components/common/TagInput'
-import MainArea from '@/components/layout/MainArea'
-import { SITE_TITLE } from '@/config'
-
-import type { FC, FormEvent } from 'react'
-
-
-export default (() => {
-  const [tagName, setTagName] = useState ('')
-  const [parentTagName, setParentTagName] = useState ('')
-
-  const handleSearch = (e: FormEvent) => {
-    e.preventDefault ()
-  }
-
-  return (
-      <MainArea>
-	<Helmet>
-	  <title>素材集 | {SITE_TITLE}</title>
-	</Helmet>
-
-	<div className="max-w-xl">
-	  <PageTitle>素材集</PageTitle>
-
-	  <form onSubmit={handleSearch} className="space-y-2">
-	    {/* タグ */}
-	    <div>
-	      <Label>タグ</Label>
-	      <TagInput
-		  value={tagName}
-		  setValue={setTagName}/>
-	    </div>
-
-	    {/* 親タグ */}
-	    <div>
-	      <Label>親タグ</Label>
-	      <TagInput
-		  value={parentTagName}
-		  setValue={setParentTagName}/>
-	    </div>
-	  </form>
-	</div>
-      </MainArea>)
-}) satisfies FC

frontend/src/pages/posts/PostDetailPage.tsx

@@ -93,7 +93,7 @@ export default (({ user }: Props) => {
 		       : 'bg-gray-500 hover:bg-gray-600')
 
   return (
-      <div className="md:flex md:flex-1 md:h-[calc(100dvh-88px)]">
+      <div className="md:flex md:flex-1">
 	<Helmet>
 	  {(post?.thumbnail || post?.thumbnailBase) && (
 	      <meta name="thumbnail" content={post.thumbnail || post.thumbnailBase}/>)}

frontend/src/pages/posts/PostListPage.tsx

@@ -69,7 +69,7 @@ export default (() => {
   }, [location.search])
 
   return (
-      <div className="md:flex md:flex-1 md:h-[calc(100dvh-88px)]" ref={containerRef}>
+      <div className="md:flex md:flex-1" ref={containerRef}>
 	<Helmet>
 	  <title>
 	    {tags.length

frontend/src/pages/posts/PostSearchPage.tsx

@@ -7,22 +7,24 @@ import { useLocation, useNavigate } from 'react-router-dom'
 import PrefetchLink from '@/components/PrefetchLink'
 import SortHeader from '@/components/SortHeader'
 import TagLink from '@/components/TagLink'
+import TagSearchBox from '@/components/TagSearchBox'
 import DateTimeField from '@/components/common/DateTimeField'
 import Label from '@/components/common/Label'
 import PageTitle from '@/components/common/PageTitle'
 import Pagination from '@/components/common/Pagination'
-import TagInput from '@/components/common/TagInput'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
+import { apiGet } from '@/lib/api'
 import { fetchPosts } from '@/lib/posts'
 import { postsKeys } from '@/lib/queryKeys'
 import { dateString, originalCreatedAtString } from '@/lib/utils'
 
-import type { FC, FormEvent } from 'react'
+import type { FC, ChangeEvent, FormEvent, KeyboardEvent } from 'react'
 
 import type { FetchPostsOrder,
 	      FetchPostsOrderField,
-	      FetchPostsParams } from '@/types'
+	      FetchPostsParams,
+	      Tag } from '@/types'
 
 
 const setIf = (qs: URLSearchParams, k: string, v: string | null) => {
@@ -55,11 +57,14 @@ export default (() => {
   const qUpdatedTo = query.get ('updated_to') ?? ''
   const order = (query.get ('order') || 'original_created_at:desc') as FetchPostsOrder
 
+  const [activeIndex, setActiveIndex] = useState (-1)
   const [createdFrom, setCreatedFrom] = useState<string | null> (null)
   const [createdTo, setCreatedTo] = useState<string | null> (null)
   const [matchType, setMatchType] = useState<'all' | 'any'> ('all')
   const [originalCreatedFrom, setOriginalCreatedFrom] = useState<string | null> (null)
   const [originalCreatedTo, setOriginalCreatedTo] = useState<string | null> (null)
+  const [suggestions, setSuggestions] = useState<Tag[]> ([])
+  const [suggestionsVsbl, setSuggestionsVsbl] = useState (false)
   const [tagsStr, setTagsStr] = useState ('')
   const [title, setTitle] = useState ('')
   const [updatedFrom, setUpdatedFrom] = useState<string | null> (null)
@@ -98,6 +103,58 @@ export default (() => {
     document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
   }, [location.search])
 
+  // TODO: TagSearch からのコピペのため，共通化を考へる．
+  const whenChanged = async (ev: ChangeEvent<HTMLInputElement>) => {
+    setTagsStr (ev.target.value)
+
+    const q = ev.target.value.trim ().split (' ').at (-1)
+    if (!(q))
+      {
+	setSuggestions ([])
+	return
+      }
+
+    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: { q } })
+    setSuggestions (data.filter (t => t.postCount > 0))
+    if (suggestions.length > 0)
+      setSuggestionsVsbl (true)
+  }
+
+  // TODO: TagSearch からのコピペのため，共通化を考へる．
+  const handleKeyDown = (ev: KeyboardEvent<HTMLInputElement>) => {
+    switch (ev.key)
+    {
+    case 'ArrowDown':
+      ev.preventDefault ()
+      setActiveIndex (i => Math.min (i + 1, suggestions.length - 1))
+      setSuggestionsVsbl (true)
+      break
+
+    case 'ArrowUp':
+      ev.preventDefault ()
+      setActiveIndex (i => Math.max (i - 1, -1))
+      setSuggestionsVsbl (true)
+      break
+
+    case 'Enter':
+      if (activeIndex < 0)
+	break
+      ev.preventDefault ()
+      const selected = suggestions[activeIndex]
+      selected && handleTagSelect (selected)
+      break
+
+    case 'Escape':
+      ev.preventDefault ()
+      setSuggestionsVsbl (false)
+      break
+    }
+    if (ev.key === 'Enter' && (!(suggestionsVsbl) || activeIndex < 0))
+      {
+	setSuggestionsVsbl (false)
+      }
+  }
+
   const search = async () => {
     const qs = new URLSearchParams ()
     setIf (qs, 'tags', tagsStr)
@@ -115,6 +172,15 @@ export default (() => {
     navigate (`${ location.pathname }?${ qs.toString () }`)
   }
 
+  // TODO: TagSearch からのコピペのため，共通化を考へる．
+  const handleTagSelect = (tag: Tag) => {
+    const parts = tagsStr.split (' ')
+    parts[parts.length - 1] = tag.name
+    setTagsStr (parts.join (' ') + ' ')
+    setSuggestions ([])
+    setActiveIndex (-1)
+  }
+
   const handleSearch = (e: FormEvent) => {
     e.preventDefault ()
     search ()
@@ -157,11 +223,21 @@ export default (() => {
 	    </div>
 
 	    {/* タグ */}
-	    <div>
+	    <div className="relative">
 	      <Label>タグ</Label>
-	      <TagInput
+	      <input
+		  type="text"
 		  value={tagsStr}
-		  setValue={setTagsStr}/>
+		  onChange={whenChanged}
+		  onFocus={() => setSuggestionsVsbl (true)}
+		  onBlur={() => setSuggestionsVsbl (false)}
+		  onKeyDown={handleKeyDown}
+		  className="w-full border p-2 rounded"/>
+	      <TagSearchBox
+		  suggestions={
+		      suggestionsVsbl && suggestions.length > 0 ? suggestions : [] as Tag[]}
+		  activeIndex={activeIndex}
+		  onSelect={handleTagSelect}/>
 	      <fieldset className="w-full my-2">
 		<label>検索区分：</label>
 		<label className="mx-2">

frontend/src/pages/theatres/TheatreDetailPage.tsx

@@ -2,225 +2,85 @@ import { useEffect, useRef, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useParams } from 'react-router-dom'
 
-import ErrorScreen from '@/components/ErrorScreen'
 import PostEmbed from '@/components/PostEmbed'
-import PrefetchLink from '@/components/PrefetchLink'
-import TagDetailSidebar from '@/components/TagDetailSidebar'
 import MainArea from '@/components/layout/MainArea'
-import SidebarComponent from '@/components/layout/SidebarComponent'
 import { SITE_TITLE } from '@/config'
-import { apiGet, apiPatch, apiPost, apiPut } from '@/lib/api'
+import { apiGet, apiPatch, apiPut } from '@/lib/api'
 import { fetchPost } from '@/lib/posts'
-import { dateString } from '@/lib/utils'
 
 import type { FC } from 'react'
 
-import type { NiconicoMetadata,
-	      NiconicoViewerHandle,
-	      Post,
-	      Theatre,
-	      TheatreComment } from '@/types'
+import type { NiconicoMetadata, NiconicoViewerHandle, Post, Theatre } from '@/types'
 
 type TheatreInfo = {
     hostFlg:        boolean
     postId:         number | null
-    postStartedAt:  string | null
-    watchingUsers:  { id: number; name: string }[] }
-
-const INITIAL_THEATRE_INFO =
-    { hostFlg: false,
-      postId: null,
-      postStartedAt: null,
-      watchingUsers: [] as { id: number; name: string }[] } as const
+    postStartedAt:  string | null }
 
 
 export default (() => {
   const { id } = useParams ()
 
-  const commentsRef = useRef<HTMLDivElement> (null)
   const embedRef = useRef<NiconicoViewerHandle> (null)
-  const theatreInfoRef = useRef<TheatreInfo> (INITIAL_THEATRE_INFO)
-  const videoLengthRef = useRef (0)
-  const lastCommentNoRef = useRef (0)
 
-  const [comments, setComments] = useState<TheatreComment[]> ([])
-  const [content, setContent] = useState ('')
   const [loading, setLoading] = useState (false)
-  const [sending, setSending] = useState (false)
-  const [status, setStatus] = useState (200)
   const [theatre, setTheatre] = useState<Theatre | null> (null)
-  const [theatreInfo, setTheatreInfo] = useState<TheatreInfo> (INITIAL_THEATRE_INFO)
+  const [theatreInfo, setTheatreInfo] =
+      useState<TheatreInfo> ({ hostFlg: false, postId: null, postStartedAt: null })
   const [post, setPost] = useState<Post | null> (null)
-  const [videoLength, setVideoLength] = useState (0)
-
-  useEffect (() => {
-    theatreInfoRef.current = theatreInfo
-  }, [theatreInfo])
-
-  useEffect (() => {
-    videoLengthRef.current = videoLength
-  }, [videoLength])
-
-  useEffect (() => {
-    lastCommentNoRef.current = comments[0]?.no ?? 0
-  }, [comments])
+  const [videoLength, setVideoLength] = useState (9_999_999_999)
 
   useEffect (() => {
     if (!(id))
       return
 
-    let cancelled = false
-
-    setComments ([])
-    setTheatre (null)
-    setPost (null)
-    setTheatreInfo (INITIAL_THEATRE_INFO)
-    setVideoLength (0)
-    lastCommentNoRef.current = 0
-
     void (async () => {
-      try
-      {
-	const data = await apiGet<Theatre> (`/theatres/${ id }`)
-	if (!(cancelled))
-	  setTheatre (data)
-      }
-      catch (error)
-      {
-	setStatus ((error as any)?.response.status ?? 200)
-      }
+      setTheatre (await apiGet<Theatre> (`/theatres/${ id }`))
     }) ()
 
-    return () => {
-      cancelled = true
-    }
-  }, [id])
+    const interval = setInterval (async () => {
+      if (theatreInfo.hostFlg
+	  && theatreInfo.postStartedAt
+	  && ((new Date).getTime () - (new Date (theatreInfo.postStartedAt)).getTime ()
+	      > videoLength))
+	setTheatreInfo ({ hostFlg: true, postId: null, postStartedAt: null })
+      else
+	setTheatreInfo (await apiPut<TheatreInfo> (`/theatres/${ id }/watching`))
+    }, 1_000)
+
+    return () => clearInterval (interval)
+  }, [id, theatreInfo.hostFlg, theatreInfo.postStartedAt, videoLength])
 
   useEffect (() => {
-    if (!(id))
+    if (!(theatreInfo.hostFlg) || loading)
       return
 
-    let cancelled = false
-    let running = false
-
-    const tick = async () => {
-      if (running)
-	return
-
-      running = true
-
-      try
+    if (theatreInfo.postId == null)
       {
-	const newComments = await apiGet<TheatreComment[]> (
-	    `/theatres/${ id }/comments`,
-	    { params: { no_gt: lastCommentNoRef.current } })
-
-	if (!(cancelled) && newComments.length > 0)
-	  {
-	    lastCommentNoRef.current = newComments[newComments.length - 1].no
-	    setComments (prev => [...newComments, ...prev])
-	  }
-
-	const currentInfo = theatreInfoRef.current
-	const ended =
-	    currentInfo.hostFlg
-	    && currentInfo.postStartedAt
-	    && ((Date.now () - (new Date (currentInfo.postStartedAt)).getTime ())
-	        > videoLengthRef.current + 3_000)
-
-	if (ended)
-	  {
-	    if (!(cancelled))
-	      setTheatreInfo (prev => ({ ...prev, postId: null, postStartedAt: null }))
-
-	    return
-	  }
-
-	const nextInfo = await apiPut<TheatreInfo> (`/theatres/${ id }/watching`)
-	if (!(cancelled))
-	  setTheatreInfo (nextInfo)
-      }
-      catch (error)
-      {
-	console.error (error)
-      }
-      finally
-      {
-	running = false
-      }
-    }
-
-    tick ()
-    const interval = setInterval (() => tick (), 1_500)
-
-    return () => {
-      cancelled = true
-      clearInterval (interval)
-    }
-  }, [id])
-
-  useEffect (() => {
-    if (!(id) || !(theatreInfo.hostFlg) || loading || theatreInfo.postId != null)
-      return
-
-    let cancelled = false
-
-    void (async () => {
-      setLoading (true)
-
-      try
-      {
-	await apiPatch<void> (`/theatres/${ id }/next_post`)
-      }
-      catch (error)
-      {
-	console.error (error)
-      }
-      finally
-      {
-	if (!(cancelled))
+	void (async () => {
+	  setLoading (true)
+	  await apiPatch<void> (`/theatres/${ id }/next_post`)
 	  setLoading (false)
+	}) ()
+	return
       }
-    }) ()
-
-    return () => {
-      cancelled = true
-    }
-  }, [id, theatreInfo.hostFlg, theatreInfo.postId])
+  }, [id, loading, theatreInfo.hostFlg, theatreInfo.postId])
 
   useEffect (() => {
-    setVideoLength (0)
-
     if (theatreInfo.postId == null)
       return
 
-    let cancelled = false
-
     void (async () => {
-      try
-      {
-	const nextPost = await fetchPost (String (theatreInfo.postId))
-	if (!(cancelled))
-	  setPost (nextPost)
-      }
-      catch (error)
-      {
-	console.error (error)
-      }
+      setPost (await fetchPost (String (theatreInfo.postId)))
     }) ()
-
-    return () => {
-      cancelled = true
-    }
-  }, [theatreInfo.postId])
+  }, [theatreInfo.postId, theatreInfo.postStartedAt])
 
   const syncPlayback = (meta: NiconicoMetadata) => {
     if (!(theatreInfo.postStartedAt))
       return
 
-    const targetTime = Math.min (
-	Math.max (0, Date.now () - (new Date (theatreInfo.postStartedAt)).getTime ()),
-	videoLength)
+    const targetTime =
+	((new Date).getTime () - (new Date (theatreInfo.postStartedAt)).getTime ())
 
     const drift = Math.abs (meta.currentTime - targetTime)
 
@@ -228,11 +88,8 @@ export default (() => {
       embedRef.current?.seek (targetTime)
   }
 
-  if (status >= 400)
-    return <ErrorScreen status={status}/>
-
   return (
-      <div className="md:flex md:flex-1">
+      <MainArea>
 	<Helmet>
 	  {theatre && (
 	      <title>
@@ -242,100 +99,16 @@ export default (() => {
 	      </title>)}
 	</Helmet>
 
-	<div className="hidden md:block">
-	  {post && <TagDetailSidebar post={post}/>}
-	</div>
-
-	<MainArea>
-	  {post ? (
-	      <>
-		<PostEmbed
-		    key={post.id}
-		    ref={embedRef}
-		    post={post}
-		    onLoadComplete={info => {
-		      embedRef.current?.play ()
-		      setVideoLength (info.lengthInSeconds * 1_000)
-		    }}
-		    onMetadataChange={syncPlayback}/>
-		<div className="m-2">
-		  <>再生中：</>
-		  <PrefetchLink to={`/posts/${ post.id }`} className="font-bold">
-		    {post.title || post.url}
-		  </PrefetchLink>
-		</div>
-	      </>) : 'Loading...'}
-	</MainArea>
-
-	<SidebarComponent>
-	  <form
-	      className="w-auto h-auto border border-black dark:border-white rounded mx-2"
-	      onSubmit={async e => {
-		e.preventDefault ()
-
-		if (!(content))
-		  return
-
-		try
-		{
-		  setSending (true)
-		  await apiPost (`/theatres/${ id }/comments`, { content })
-		  setContent ('')
-		  commentsRef.current?.scrollTo ({ top: 0, behavior: 'smooth' })
-		}
-		finally
-		{
-		  setSending (false)
-		}
-	      }}>
-	    <input
-		className="w-full p-2 border rounded"
-		type="text"
-		placeholder="ここにコメントを入力"
-		value={content}
-		onChange={e => setContent (e.target.value)}
-		disabled={sending}/>
-
-	    <div
-		ref={commentsRef}
-		className="overflow-x-hidden overflow-y-scroll text-wrap w-full
-			   h-[32vh] md:h-[64vh] border rounded">
-	      {comments.map (comment => (
-		  <div key={comment.no} className="p-2">
-		    <div className="w-full">
-		      {comment.content}
-		    </div>
-		    <div className="w-full text-sm text-right">
-		      by {comment.user
-			  ? (comment.user.name || `名もなきニジラー（#${ comment.user.id }）`)
-			  : '運営'}
-		    </div>
-		    <div className="w-full text-sm text-right">
-		      {dateString (comment.createdAt)}
-		    </div>
-		  </div>))}
-	    </div>
-	  </form>
-
-	  <div className="w-auto h-auto border border-black dark:border-white rounded mx-2 mt-4">
-	    <div className="p-2">
-		現在の同接数：{theatreInfo.watchingUsers.length}
-	    </div>
-
-	    <div className="overflow-x-hidden overflow-y-scroll text-wrap w-full h-32
-			    border rounded">
-	      <ul className="list-inside list-disc">
-		{theatreInfo.watchingUsers.map (user => (
-		    <li key={user.id} className="px-4 py-1 text-sm">
-		      {user.name || `名もなきニジラー（#${ user.id }）`}
-		    </li>))}
-	      </ul>
-	    </div>
-	  </div>
-	</SidebarComponent>
-
-	<div className="md:hidden">
-	  {post && <TagDetailSidebar post={post} sp/>}
-	</div>
-      </div>)
+	{post && (
+	    <PostEmbed
+		ref={embedRef}
+		post={post}
+		onLoadComplete={info => {
+		  embedRef.current?.play ()
+		  setVideoLength (info.lengthInSeconds * 1_000)
+		}}
+		onMetadataChange={meta => {
+		  syncPlayback (meta)
+		}}/>)}
+      </MainArea>)
 }) satisfies FC

frontend/src/types.ts

@@ -49,22 +49,10 @@ export type FetchTagsParams = {
     limit:        number
     order:        FetchTagsOrder }
 
-export type Material = {
-    id:             number
-    tag:            Tag
-    file:           string | null
-    url:            string | null
-    wikiPageBody?:  string | null
-    contentType:    string | null
-    createdAt:      string
-    createdByUser:  { id: number; name: string }
-    updatedAt:      string
-    updatedByUser:  { id: number; name: string } }
-
 export type Menu = MenuItem[]
 
 export type MenuItem = {
-    name:     ReactNode
+    name:     string
     to:       string
     base?:    string
     subMenu:  SubMenuItem[] }
@@ -129,7 +117,7 @@ export type PostTagChange = {
 export type SubMenuItem =
     | { component:  ReactNode
 	visible:    boolean }
-    | { name:     ReactNode
+    | { name:     string
 	to:       string
 	visible?: boolean }
 
@@ -141,7 +129,6 @@ export type Tag = {
     createdAt:      string
     updatedAt:      string
     hasWiki:        boolean
-    materialId:     number
     children?:      Tag[]
     matchedAlias?:  string | null }
 
@@ -154,13 +141,6 @@ export type Theatre = {
     createdAt:      string
     updatedAt:      string }
 
-export type TheatreComment = {
-    theatreId:  number,
-    no:         number,
-    user:       { id: number, name: string } | null
-    content:    string
-    createdAt:  string }
-
 export type User = {
     id:               number
     name:             string | null