#63

.gitea/ISSUE_TEMPLATE.md

@@ -1,35 +0,0 @@
-## 背景
-
-なぜ必要か。
-
-## 対象範囲
-
-- backend:
-- frontend:
-- docs:
-- migration:
-
-## やること
-
-- [ ] 
-
-## 受け入れ条件
-
-- [ ] 
-
-## 実行すべき確認
-
-- [ ] `cd backend && bundle exec rspec`
-- [ ] `cd frontend && npm run build`
-- [ ] `cd frontend && npm run lint`
-
-## 禁止事項
-
-- unrelated refactor はしない
-- 既存 API response shape を壊さない
-- 認証・認可・BAN を弱めない
-
-## Codex への指示
-
-この issue を読んで実装してください。
-不明点があれば、実装前に調査結果と選択肢を提示してください。

AGENTS.md

@@ -1,143 +0,0 @@
-# AGENTS.md
-
-## Project overview
-
-BTRC Hub / タグ広場 is a split Rails API and React frontend repository.
-
-- Backend: Rails API under `backend/`.
-- Frontend: React + TypeScript + Vite under `frontend/`.
-- Docs: lightweight command notes under `docs/`.
-- There is no README or Makefile at the repository root as of this inspection.
-
-## Stack
-
-- Backend: Ruby `3.2.2` from `backend/.ruby-version`, Rails `~> 8.0.2`.
-- Backend dependencies include `mysql2`, `sqlite3`, `rspec-rails`, `factory_bot_rails`, `rack-cors`, `jwt`, `discard`, `gollum`, `whenever`, `aws-sdk-s3`, `brakeman`, and `rubocop-rails-omakase`.
-- Frontend: React `^19.1.0`, TypeScript `~5.8.3`, Vite `^6.3.5`.
-- Frontend data/UI dependencies include Axios, TanStack Query, Tailwind CSS, Framer Motion, Radix UI components, lucide-react, MDX/Markdown tooling, and Zustand.
-
-## Main directories
-
-- `backend/app/controllers`: Rails API controllers.
-- `backend/app/models`: Active Record models.
-- `backend/app/representations`: API response representation classes.
-- `backend/app/services`: domain services such as version recording, wiki commit, YouTube sync, and similarity calculation.
-- `backend/config/routes.rb`: API routes.
-- `backend/db/migrate`: migrations.
-- `backend/db/schema.rb`: current schema snapshot.
-- `backend/lib/tasks`: custom Rake tasks.
-- `backend/spec`: RSpec tests.
-- `backend/test`: Rails minitest files that still exist in the tree.
-- `frontend/src/App.tsx`: frontend route definitions and initial user setup.
-- `frontend/src/pages`: page-level React components.
-- `frontend/src/components`: shared and feature components.
-- `frontend/src/lib`: API client helpers, query keys, prefetchers, and domain helpers.
-- `frontend/src/stores`: Zustand stores.
-- `docs/commands.md`: command notes.
-
-## Commands
-
-Only list commands that are backed by files inspected in this repository.
-
-### Backend
-
-The following binstubs exist under `backend/bin`:
-
-```sh
-cd backend
-bin/setup
-bin/dev
-bin/rails
-bin/rake
-bin/rubocop
-bin/brakeman
-bin/kamal
-bin/thrust
-```
-
-Common Rails/Rake usage through existing binstubs:
-
-```sh
-cd backend
-bin/rails db:prepare
-bin/rails db:migrate
-bin/rails routes
-bin/rails server
-bin/rake
-bin/rubocop
-bin/brakeman
-```
-
-RSpec is present in `Gemfile` and `.rspec` exists:
-
-```sh
-cd backend
-bundle exec rspec
-```
-
-### Frontend
-
-The following npm scripts exist in `frontend/package.json`:
-
-```sh
-cd frontend
-npm run dev
-npm run build
-npm run lint
-npm run preview
-```
-
-`npm run build` runs `tsc -b && vite build`, then `postbuild` runs `node scripts/generate-sitemap.js`.
-
-Do not write or report `npm test` as a repository command unless a `test` script is added to `frontend/package.json`.
-
-## Coding style
-
-- Prefer precise, minimal changes.
-- Do not flatter or over-explain.
-- Explain risks directly.
-- Prefer single quotes for strings unless interpolation or escaping makes double quotes better.
-- Ruby: never put a space before method-call parentheses.
-- Ruby: do not use `%w` or `%i`.
-- TypeScript and Python: use GNU-style spacing before parentheses where syntactically valid.
-- Do not add production dependencies without explicit approval.
-
-## Backend rules
-
-- Inspect existing routes, controllers, models, services, and specs before editing backend behavior.
-- For API behavior changes, add or update request specs under `backend/spec/requests`.
-- Prefer RSpec for new backend tests; existing minitest files under `backend/test` do not make minitest the default for new coverage.
-- Do not weaken authentication, BAN user checks, or IP BAN checks.
-- Preserve the `X-Transfer-Code` user identification flow unless the task explicitly changes authentication.
-- Be careful with version tables, `version_no`, optimistic concurrency, wiki revisions, and restore/diff behavior.
-- Be careful with tag names, tag normalization, implications, similarities, and discard behavior.
-- Keep migration files and `backend/db/schema.rb` consistent when changing schema.
-
-## Frontend rules
-
-- Use `frontend/src/lib/api.ts` for API calls so headers and camelCase conversion stay consistent.
-- Add or reuse TanStack Query keys through `frontend/src/lib/queryKeys.ts`; avoid ad hoc query key arrays.
-- Encode URL path-segment values with `encodeURIComponent`.
-- React hooks must be called unconditionally.
-- Keep page-level code under `frontend/src/pages` and shared UI/feature code under `frontend/src/components` unless existing patterns point elsewhere.
-- Match existing Tailwind, component, and import alias conventions.
-
-## Codex workflow
-
-- First inspect existing patterns; do not invent new architecture when a local convention exists.
-- Keep changes scoped to the requested issue.
-- Do not scan or summarize dependency/generated/runtime directories such as `node_modules`, `dist`, `tmp`, `log`, and `storage` unless explicitly needed.
-- Before touching wiki, tag, versioning, BAN, IP BAN, or authentication behavior, inspect the related request specs and service objects.
-- If frontend code changes, run the existing frontend verification commands that apply: `npm run build` and `npm run lint`.
-- If backend code changes, run the relevant RSpec command; for broad backend changes, run `bundle exec rspec`.
-- If a verification command cannot be run or fails, report the exact command and failure.
-
-## Completion criteria
-
-A task is complete only when:
-
-- implementation is complete,
-- relevant verification commands pass, or failures are clearly explained,
-- unrelated files are not changed,
-- migrations and schema are consistent when schema changes are made,
-- user-facing behavior is documented when needed.

backend/AGENTS.md

@@ -1,147 +0,0 @@
-# backend/AGENTS.md
-
-## Scope
-
-These rules apply to work under `backend/`.
-
-This is a Rails API app using Active Record, RSpec, request specs, service objects, representation classes, and version tables for post/tag/wiki history.
-
-## Commands
-
-Use commands backed by files and dependencies in this directory:
-
-```sh
-bin/setup
-bin/dev
-bin/rails
-bin/rake
-bin/rubocop
-bin/brakeman
-bundle exec rspec
-```
-
-Common checks:
-
-```sh
-bundle exec rspec
-bin/rubocop
-bin/brakeman
-```
-
-Common Rails commands:
-
-```sh
-bin/rails db:prepare
-bin/rails db:migrate
-bin/rails routes
-bin/rails server
-```
-
-After backend behavior changes, run the relevant RSpec files. For broad backend changes, run:
-
-```sh
-bundle exec rspec
-```
-
-If a command cannot be run or fails, report the exact command and failure.
-
-## Rails structure
-
-- `app/controllers`: API controllers.
-- `app/models`: Active Record models and concerns.
-- `app/representations`: JSON response shaping.
-- `app/services`: domain services such as version recorders, wiki commit, YouTube sync, and similarity calculation.
-- `config/routes.rb`: public API routes.
-- `db/migrate`: migrations.
-- `db/schema.rb`: schema snapshot.
-- `lib/tasks`: custom Rake tasks.
-- `spec`: RSpec tests.
-
-Before changing behavior, inspect the matching route, controller, model, service, representation, and spec.
-
-## Ruby style
-
-- Prefer precise, minimal changes.
-- Use single quotes unless interpolation or escaping makes double quotes better.
-- Do not put a space before Ruby method-call parentheses.
-- Do not use `%w` or `%i` in new Ruby code.
-- Keep comments short and useful; avoid narrating obvious code.
-- Do not add production dependencies without approval.
-
-## Authentication and authorization
-
-- Authentication is handled through the `X-Transfer-Code` header in `ApplicationController#authenticate_user`.
-- `current_user` is set by looking up `User.inheritance_code`.
-- Do not bypass or weaken the `X-Transfer-Code` flow unless the task explicitly changes authentication.
-- Unauthenticated write actions should return `:unauthorized` consistently with existing controllers.
-- Role checks use `User` enum roles: `guest`, `member`, and `admin`.
-- Use `current_user.gte_member?` for member-or-admin write permissions where existing controllers do so.
-- Use `current_user.admin?` only for admin-only paths, such as tag child relationship changes.
-- Do not replace role checks with looser presence checks.
-
-## BAN and IP BAN
-
-- `ApplicationController` runs these before actions in order:
-  - `reject_banned_ip_address!`
-  - `authenticate_user`
-  - `reject_banned_user!`
-- User and IP bans use `banned_at`, not a boolean `banned` column.
-- `User#banned?` and `IpAddress#banned?` check `banned_at.present?`.
-- Do not weaken BAN or IP BAN behavior.
-- If changing request authentication or controller before actions, add or update request specs covering banned users and banned IP addresses.
-
-## RSpec
-
-- Prefer RSpec for new backend tests.
-- Put API behavior coverage under `spec/requests`.
-- Put model behavior under `spec/models`.
-- Put service behavior under `spec/services`.
-- Put Rake task coverage under `spec/tasks`.
-- `spec/rails_helper.rb` loads `spec/support/**/*.rb`.
-- Request specs include `AuthHelper` and `JsonHelper`.
-- `AuthHelper#sign_in_as(user)` stubs `ApplicationController#current_user`; use it when matching existing request spec style.
-- Add or update request specs for API behavior changes, especially status codes, permissions, response shape, and version conflict behavior.
-
-## Migrations
-
-- Keep migrations and `db/schema.rb` consistent.
-- Use reversible migrations where practical; otherwise define explicit `up` and `down`.
-- For data backfills inside migrations, follow the existing pattern of defining migration-local `ActiveRecord::Base` classes with `self.table_name`.
-- Preserve existing indexes, foreign keys, check constraints, and null constraints.
-- Be careful with MySQL-specific options already present in migrations, such as `after:`.
-- Do not edit old migrations just to change current behavior unless explicitly requested; add a new migration.
-
-## Version tables
-
-- Versioned records include posts, tags, nico tags, and wiki pages.
-- Current records have `version_no`; version tables have positive `version_no` with unique indexes scoped to the parent record.
-- Version event types are `create`, `update`, `discard`, and `restore`.
-- Version rows are readonly through the `VersionRecord` concern.
-- Use the existing recorder services instead of manually inserting version rows in application code:
-  - `PostVersionRecorder`
-  - `TagVersionRecorder`
-  - `NicoTagVersionRecorder`
-  - `WikiVersionRecorder`
-  - `TagVersioning`
-- `VersionRecorder` locks the current record, validates sequence consistency, skips unchanged update snapshots, creates the next version row, and updates the record `version_no`.
-- Do not update versioned records without considering whether a version snapshot must be created.
-- For optimistic concurrency paths, preserve `base_version_no`, `force`, and `merge` semantics and cover conflicts in request specs.
-
-## Domain cautions
-
-- Posts have tag snapshots, parent post implications, original-created ranges, viewed state, and version conflict behavior.
-- Tags have canonical names, aliases through `TagName`, categories, parent implications, discard behavior, and version snapshots.
-- Nico tags have separate relation/version behavior; do not treat them like normal editable tags without checking existing code.
-- Wiki pages involve page content, revisions/history, version rows, title/tag-name behavior, and diff/restore paths.
-- Materials, theatres, and comments have user and permission checks; inspect the controller before changing them.
-
-## API responses
-
-- Use representation classes under `app/representations` when existing endpoints do.
-- Keep response keys consistent with existing JSON contracts; frontend code expects camelCase conversion client-side, while Rails params and JSON keys are generally snake_case.
-- Preserve existing HTTP status conventions: `:unauthorized` for no user, `:forbidden` for insufficient role or banned user, `:not_found` for missing records, and `:unprocessable_entity` for validation failures.
-
-## Files to avoid in routine work
-
-- Do not inspect or edit `tmp/`, `log/`, `storage/`, `vendor/`, or dependency directories unless explicitly needed.
-- Do not modify generated schema or migration output without the corresponding migration when schema changes are made.

backend/app/controllers/application_controller.rb

@@ -1,16 +1,14 @@
 class ApplicationController < ActionController::API
-  before_action :reject_banned_ip_address!
   before_action :authenticate_user
-  before_action :reject_banned_user!
 
-  def current_user = @current_user
+  def current_user
+    @current_user
+  end
 
   private
 
   def authenticate_user
     code = request.headers['X-Transfer-Code'] || request.headers['HTTP_X_TRANSFER_CODE']
-    return if code.blank?
-
     @current_user = User.find_by(inheritance_code: code)
   end
 
@@ -24,17 +22,4 @@ class ApplicationController < ActionController::API
       s.in?(['', '1', 'true', 'on', 'yes'])
     end
   end
-
-  def reject_banned_ip_address!
-    ip_address = IpAddress.find_by(ip_address: IPAddr.new(request.remote_ip).hton)
-    return unless ip_address&.banned?
-
-    head :forbidden
-  end
-
-  def reject_banned_user!
-    return unless current_user&.banned?
-
-    head :forbidden
-  end
 end

backend/app/controllers/posts_controller.rb

@@ -44,7 +44,7 @@ class PostsController < ApplicationController
         filtered_posts
         .joins("LEFT JOIN (#{ pt_max_sql }) pt_max ON pt_max.post_id = posts.id")
         .reselect('posts.*', Arel.sql("#{ updated_at_all_sql } AS updated_at_all"))
-        .preload(tags: [:deerjikists, :materials, { tag_name: :wiki_page }])
+        .preload(tags: [:materials, { tag_name: :wiki_page }])
         .with_attached_thumbnail
 
     q = q.where('posts.url LIKE ?', "%#{ url }%") if url
@@ -95,7 +95,7 @@ class PostsController < ApplicationController
   end
 
   def random
-    post = filtered_posts.preload(tags: [:deerjikists, :materials, { tag_name: :wiki_page }])
+    post = filtered_posts.preload(tags: [:materials, { tag_name: :wiki_page }])
                          .order('RAND()')
                          .first
     return head :not_found unless post
@@ -104,7 +104,7 @@ class PostsController < ApplicationController
   end
 
   def show
-    post = Post.includes(tags: [:deerjikists, :materials, { tag_name: :wiki_page }]).find_by(id: params[:id])
+    post = Post.includes(tags: [:materials, { tag_name: :wiki_page }]).find_by(id: params[:id])
     return head :not_found unless post
 
     render json: PostRepr.base(post, current_user)
@@ -173,68 +173,33 @@ class PostsController < ApplicationController
     return head :unauthorized unless current_user
     return head :forbidden unless current_user.gte_member?
 
-    force = bool?(:force)
-    merge = bool?(:merge)
-    return head :bad_request if force && merge
-
-    base_version_no = parse_base_version_no
-    return head :bad_request if !(force) && !(base_version_no)
-
     title = params[:title].presence
     tag_names = params[:tags].to_s.split
     original_created_from = params[:original_created_from]
     original_created_before = params[:original_created_before]
     parent_post_ids = parse_parent_post_ids
 
-    post = nil
-    conflict_json = nil
+    post = Post.find(params[:id].to_i)
 
     ApplicationRecord.transaction do
-      post = Post.lock.find(params[:id].to_i)
+      PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
 
-      base_version = nil
-      base_snapshot = nil
-      current_snapshot = nil
-      unless force
-        base_version = post.post_versions.find_by!(version_no: base_version_no)
+      post.update!(title:, original_created_from:, original_created_before:)
 
-        base_snapshot = post_snapshot_from_version(base_version)
-        current_snapshot = post_snapshot_from_record(post)
+      normalised_tags = Tag.normalise_tags!(tag_names, with_tagme: false)
+      TagVersioning.record_tag_snapshots!(normalised_tags, created_by_user: current_user)
+
+      tags = post.tags.nico.to_a + normalised_tags
+      tags = Tag.expand_parent_tags(tags)
+      sync_post_tags!(post, tags)
+
+      sync_parent_posts!(post, parent_post_ids)
+
+      PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
     end
-      incoming_snapshot = post_incoming_snapshot(title:,
-                                                 original_created_from:,
-                                                 original_created_before:,
-                                                 tag_names:,
-                                                 parent_post_ids:)
-
-      snapshot_to_apply =
-          if force || post.version_no == base_version_no || current_snapshot == base_snapshot
-            incoming_snapshot
-          else
-            changes = post_snapshot_changes(base_snapshot, current_snapshot, incoming_snapshot)
-            conflicts = changes.select { |change| change[:conflict] }
-
-            if merge && conflicts.empty?
-              merge_post_snapshots(base_snapshot, current_snapshot, incoming_snapshot)
-            else
-              conflict_json = post_conflict_json(post:,
-                                                 base_version_no:,
-                                                 base_snapshot:,
-                                                 current_snapshot:,
-                                                 incoming_snapshot:,
-                                                 changes:,
-                                                 conflicts:)
-              raise ActiveRecord::Rollback
-            end
-          end
-
-      apply_post_snapshot!(post, snapshot_to_apply)
-    end
-
-    return render json: conflict_json, status: :conflict if conflict_json
 
     post.reload
-    json = PostRepr.base(post, current_user)
+    json = post.as_json
     json['tags'] = build_tag_tree_for(post.tags)
     render json:, status: :ok
   rescue Tag::NicoTagNormalisationError
@@ -260,7 +225,7 @@ class PostsController < ApplicationController
     pts = pts.where(post_id: id) if id.present?
     pts = pts.where(tag_id:) if tag_id.present?
     pts = pts.includes(:post, :created_user, :deleted_user,
-                       tag: [:deerjikists, :materials, { tag_name: :wiki_page }])
+                       tag: [:materials, { tag_name: :wiki_page }])
 
     events = []
     pts.each do |pt|
@@ -439,205 +404,4 @@ class PostsController < ApplicationController
       PostImplication.create_or_find_by!(post_id: post.id, parent_post_id:)
     end
   end
-
-  def parse_base_version_no
-    version_no = Integer(params[:base_version_no], exception: false)
-    if version_no&.positive?
-      version_no
-    else
-      nil
-    end
-  end
-
-  def post_snapshot_from_version version
-    { title: version.title,
-      original_created_from: snapshot_time(version.original_created_from),
-      original_created_before: snapshot_time(version.original_created_before),
-      tag_names: editable_tag_names_from_version(version),
-      parent_post_ids: snapshot_parent_post_ids_from_version(version) }
-  end
-
-  def editable_tag_names_from_version version
-    version.tags.to_s.split.reject { |name| name.downcase.start_with?('nico:') }.sort
-  end
-
-  def post_snapshot_from_record post
-    { title: post.title,
-      original_created_from: snapshot_time(post.original_created_from),
-      original_created_before: snapshot_time(post.original_created_before),
-      tag_names: editable_tag_names_from_post(post),
-      parent_post_ids: post.parent_posts.order(:id).pluck(:id) }
-  end
-
-  def editable_tag_names_from_post post
-    post.tags.not_nico.joins(:tag_name).order('tag_names.name').pluck('tag_names.name')
-  end
-
-  def post_incoming_snapshot title:, original_created_from:, original_created_before:,
-                             tag_names:, parent_post_ids:
-    { title:,
-      original_created_from: snapshot_time(original_created_from),
-      original_created_before: snapshot_time(original_created_before),
-      tag_names: incoming_tag_names_for_snapshot(tag_names),
-      parent_post_ids: parent_post_ids.sort }
-  end
-
-  def snapshot_parent_post_ids_from_version version
-    if version.respond_to?(:parent_post_ids)
-      version.parent_post_ids.to_s.split.map { |id| id.to_i }.sort
-    elsif version.respond_to?(:parent_id) && version.parent_id
-      [version.parent_id]
-    else
-      []
-    end
-  end
-
-  def snapshot_time value
-    return nil if value.blank?
-
-    value = Time.zone.parse(value.to_s) if value in String
-    value&.in_time_zone&.iso8601(6)
-  rescue ArgumentError, TypeError
-    value.to_s
-  end
-
-  def incoming_tag_names_for_snapshot raw_tag_names
-    tags = Tag.normalise_tags!(raw_tag_names, with_tagme: false)
-
-    Tag.expand_parent_tags(tags).map(&:name).uniq.sort
-  end
-
-  def post_conflict_json post:, base_version_no:, base_snapshot:,
-                         current_snapshot:, incoming_snapshot:, changes:, conflicts:
-    { error: 'conflict',
-      message: '競合が発生しました．',
-      post_id: post.id,
-      base_version_no:,
-      current_version_no: post.version_no,
-      base: base_snapshot,
-      current: current_snapshot,
-      mine: incoming_snapshot,
-      changes:,
-      conflicts:,
-      mergeable: conflicts.empty? }
-  end
-
-  def post_snapshot_changes base_snapshot, current_snapshot, incoming_snapshot
-    [scalar_snapshot_change(:title, 'タイトル',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     scalar_snapshot_change(:original_created_from, 'オリジナルの作成日時（以降）',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     scalar_snapshot_change(:original_created_before, 'オリジナルの作成日時（より前）',
-                            base_snapshot, current_snapshot, incoming_snapshot),
-     set_snapshot_change(:tag_names, 'タグ',
-                         base_snapshot, current_snapshot, incoming_snapshot),
-     set_snapshot_change(:parent_post_ids, '親投稿',
-                         base_snapshot, current_snapshot, incoming_snapshot)].compact
-  end
-
-  def scalar_snapshot_change field, label, base_snapshot, current_snapshot, incoming_snapshot
-    base = base_snapshot[field]
-    current = current_snapshot[field]
-    mine = incoming_snapshot[field]
-
-    return nil if current == base && mine == base
-
-    { field:, label:, base:, current:, mine:,
-      changed_by_current: current != base,
-      changed_by_me: mine != base,
-      conflict: scalar_snapshot_conflict?(base, current, mine) }
-  end
-
-  def scalar_snapshot_conflict? base, current, mine
-    current != base && mine != base && current != mine
-  end
-
-  def set_snapshot_change field, label, base_snapshot, current_snapshot, incoming_snapshot
-    base = base_snapshot[field].to_a
-    current = current_snapshot[field].to_a
-    mine = incoming_snapshot[field].to_a
-
-    added_by_current = current - base
-    removed_by_current = base - current
-    added_by_me = mine - base
-    removed_by_me = base - mine
-
-    if (added_by_current.empty? &&
-        removed_by_current.empty? &&
-        added_by_me.empty? &&
-        removed_by_me.empty?)
-      return nil
-    end
-
-    { field:, label:, base:, current:, mine:, added_by_current:, removed_by_current:,
-      added_by_me:, removed_by_me:,
-      changed_by_current: added_by_current.present? || removed_by_current.present?,
-      changed_by_me: added_by_me.present? || removed_by_me.present?,
-      conflict: set_snapshot_conflict?(added_by_current:,
-                                       removed_by_current:,
-                                       added_by_me:,
-                                       removed_by_me:) }
-  end
-
-  def set_snapshot_conflict? added_by_current:, removed_by_current:,
-                             added_by_me:, removed_by_me:
-    (added_by_current & removed_by_me).present? || (removed_by_current & added_by_me).present?
-  end
-
-  def apply_post_snapshot! post, snapshot
-    PostVersionRecorder.ensure_snapshot!(post, created_by_user: current_user)
-
-    post.update!(title: snapshot[:title],
-                 original_created_from: snapshot[:original_created_from],
-                 original_created_before: snapshot[:original_created_before])
-
-    editable_tags = Tag.normalise_tags!(snapshot[:tag_names], with_tagme: false)
-    TagVersioning.record_tag_snapshots!(editable_tags, created_by_user: current_user)
-
-    readonly_tags = post.tags.nico.to_a
-
-    tags = readonly_tags + editable_tags
-    tags = Tag.expand_parent_tags(tags)
-
-    sync_post_tags!(post, tags)
-    sync_parent_posts!(post, snapshot[:parent_post_ids])
-
-    PostVersionRecorder.record!(post:, event_type: :update, created_by_user: current_user)
-  end
-
-  def merge_post_snapshots base_snapshot, current_snapshot, incoming_snapshot
-    [:title, :original_created_from, :original_created_before].map {
-      [_1, merge_scalar_snapshot_value(base_snapshot[_1],
-                                       current_snapshot[_1],
-                                       incoming_snapshot[_1])]
-    }.to_h.merge([:tag_names, :parent_post_ids].map {
-      [_1, merge_set_snapshot_value(base_snapshot[_1],
-                                    current_snapshot[_1],
-                                    incoming_snapshot[_1])]
-    }.to_h)
-  end
-
-  def merge_scalar_snapshot_value base, current, mine
-    return mine if current == base
-    return current if mine == base || current == mine
-
-    raise ArgumentError, '競合してゐる項目はマージできません．'
-  end
-
-  def merge_set_snapshot_value base, current, mine
-    base = base.to_a
-    current = current.to_a
-    mine = mine.to_a
-
-    added_by_current = current - base
-    removed_by_current = base - current
-    added_by_me = mine - base
-    removed_by_me = base - mine
-
-    merged = base + added_by_current + added_by_me
-    merged -= removed_by_current
-    merged -= removed_by_me
-
-    merged.uniq.sort
-  end
 end

backend/app/controllers/users_controller.rb

@@ -1,6 +1,9 @@
 class UsersController < ApplicationController
   def create
+    return head :unprocessable_entity if request.remote_ip.blank?
+
     user = nil
+
     User.transaction do
       user = User.create!(inheritance_code: SecureRandom.uuid, role: :guest)
       attach_ip_address!(user)
@@ -14,7 +17,8 @@ class UsersController < ApplicationController
   def verify
     user = User.find_by(inheritance_code: params[:code])
     return render json: { valid: false } unless user
-    return head :forbidden if user.banned?
+
+    return head :unprocessable_entity if request.remote_ip.blank?
 
     attach_ip_address!(user)
 

backend/app/models/ip_address.rb

@@ -1,10 +1,7 @@
 class IpAddress < ApplicationRecord
   validates :ip_address, presence: true, length: { maximum: 16 }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :user_ips, dependent: :destroy
   has_many :users, through: :user_ips
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
 end

backend/app/models/post.rb

@@ -28,8 +28,6 @@ class Post < ApplicationRecord
 
   has_one_attached :thumbnail
 
-  attribute :version_no, :integer, default: 1
-
   before_validation :normalise_url
 
   validates :url, presence: true, uniqueness: true

backend/app/models/tag.rb

@@ -40,8 +40,6 @@ class Tag < ApplicationRecord
   belongs_to :tag_name
   delegate :wiki_page, to: :tag_name
 
-  attribute :version_no, :integer, default: 1
-
   delegate :name, to: :tag_name, allow_nil: true
   validates :tag_name, presence: true
 

backend/app/models/user.rb

@@ -4,6 +4,7 @@ class User < ApplicationRecord
   validates :name, length: { maximum: 255 }
   validates :inheritance_code, presence: true, length: { maximum: 64 }
   validates :role, presence: true, inclusion: { in: roles.keys }
+  validates :banned, inclusion: { in: [true, false] }
 
   has_many :created_posts,
            class_name: 'Post', foreign_key: :uploaded_user_id, dependent: :nullify
@@ -18,10 +19,5 @@ class User < ApplicationRecord
            class_name: 'WikiPage', foreign_key: :updated_user_id, dependent: :nullify
 
   def viewed?(post) = user_post_views.exists?(post_id: post.id)
-
   def gte_member? = member? || admin?
-
-  def banned? = banned_at.present?
-  def ban! = banned? || update!(banned_at: Time.current)
-  def unban! = update!(banned_at: nil)
 end

backend/app/models/wiki_page.rb

@@ -15,8 +15,6 @@ class WikiPage < ApplicationRecord
 
   has_many :wiki_versions
 
-  attribute :version_no, :integer, default: 1
-
   belongs_to :tag_name
   validates :tag_name, presence: true
   validates :body, presence: true

backend/app/services/version_recorder.rb

@@ -16,20 +16,19 @@ class VersionRecorder
       @record = record_class.unscoped.lock.find(@record.id)
       latest = latest_version
 
-      validate_version_sequence!(latest)
+      if !(latest) && @event_type != 'create'
+        raise "#{ version_class.name } first event must be create"
+      end
+
+      if @event_type == 'create' && latest
+        raise "#{ version_class.name } create event already exists"
+      end
 
       attrs = snapshot_attributes
 
-      if @event_type == 'update' && latest && same_snapshot?(latest, attrs)
-        return latest
-      end
+      return latest if @event_type == 'update' && latest && same_snapshot?(latest, attrs)
 
-      version = version_class.create!(
-          base_attributes(latest).merge(record_key => @record).merge(attrs))
-
-      update_record_version_no!(version.version_no)
-
-      version
+      version_class.create!(base_attributes(latest).merge(record_key => @record).merge(attrs))
     end
   end
 
@@ -46,31 +45,7 @@ class VersionRecorder
       created_by_user: @created_by_user }
   end
 
-  def update_record_version_no! version_no
-    @record.update_columns(version_no:)
-    @record.version_no = version_no
-  end
-
-  def validate_version_sequence! latest
-    if !(latest) && @event_type != 'create'
-      raise "#{ version_class.name } first event must be create"
-    end
-
-    if @event_type == 'create' && latest
-      raise "#{ version_class.name } create event already exists"
-    end
-
-    return unless latest
-
-    if @record.version_no != latest.version_no
-      raise ("#{ record_class.name }##{ @record.id } version_no is #{ @record.version_no }, " +
-             "but latest #{ version_class.name } version_no is #{ latest.version_no }")
-    end
-  end
-
-  def same_snapshot? version, attrs
-    attrs.all? { |k, v| version.public_send(k) == v }
-  end
+  def same_snapshot?(version, attrs) = attrs.all? { |k, v| version.public_send(k) == v }
 
   def validate_event_type!
     return if EVENT_TYPES.include?(@event_type)

backend/db/migrate/20260501153900_rename_banned_to_banned_at_in_users_and_ip_addresses.rb

@@ -1,16 +0,0 @@
-class RenameBannedToBannedAtInUsersAndIpAddresses < ActiveRecord::Migration[8.0]
-  def up
-    [:users, :ip_addresses].each do
-      add_column _1, :banned_at, :datetime, after: :banned
-      add_index _1, :banned_at
-      remove_column _1, :banned
-    end
-  end
-
-  def down
-    [:ip_addresses, :users].each do
-      add_column _1, :banned, :boolean, null: false, default: false, after: :banned_at
-      remove_column _1, :banned_at
-    end
-  end
-end

backend/db/migrate/20260507124000_add_version_no_to_posts.rb

@@ -1,27 +0,0 @@
-class AddVersionNoToPosts < ActiveRecord::Migration[8.0]
-  def up
-    add_column :posts, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        posts
-      SET
-        version_no = (
-          SELECT
-            MAX(version_no)
-          FROM
-            post_versions
-          WHERE
-            post_id = posts.id)
-    SQL
-
-    change_column_null :posts, :version_no, false
-
-    add_check_constraint :posts, 'version_no > 0', name: 'chk_posts_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :posts, name: 'chk_posts_version_no_positive'
-    remove_column :posts, :version_no
-  end
-end

backend/db/migrate/20260507211600_add_version_no_to_tags.rb

@@ -1,37 +0,0 @@
-class AddVersionNoToTags < ActiveRecord::Migration[8.0]
-  def up
-    add_column :tags, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        tags
-      SET
-        version_no = (
-          CASE category
-          WHEN 'nico' THEN
-            (SELECT
-               MAX(version_no)
-             FROM
-               nico_tag_versions
-             WHERE
-               tag_id = tags.id)
-          ELSE
-            (SELECT
-               MAX(version_no)
-             FROM
-               tag_versions
-             WHERE
-               tag_id = tags.id)
-          END)
-    SQL
-
-    change_column_null :tags, :version_no, false
-
-    add_check_constraint :tags, 'version_no > 0', name: 'chk_tags_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :tags, name: 'chk_tags_version_no_positive'
-    remove_column :tags, :version_no
-  end
-end

backend/db/migrate/20260507213300_add_version_no_to_wiki_pages.rb

@@ -1,27 +0,0 @@
-class AddVersionNoToWikiPages < ActiveRecord::Migration[8.0]
-  def up
-    add_column :wiki_pages, :version_no, :integer
-
-    execute <<~SQL
-      UPDATE
-        wiki_pages
-      SET
-        version_no = (
-          SELECT
-            MAX(version_no)
-          FROM
-            wiki_versions
-          WHERE
-            wiki_page_id = wiki_pages.id)
-    SQL
-
-    change_column_null :wiki_pages, :version_no, false
-
-    add_check_constraint :wiki_pages, 'version_no > 0', name: 'chk_wiki_pages_version_no_positive'
-  end
-
-  def down
-    remove_check_constraint :wiki_pages, name: 'chk_wiki_pages_version_no_positive'
-    remove_column :wiki_pages, :version_no
-  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_05_07_213300) do
+ActiveRecord::Schema[8.0].define(version: 2026_04_27_214800) 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
@@ -50,10 +50,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
 
   create_table "ip_addresses", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
     t.binary "ip_address", limit: 16, null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_ip_addresses_on_banned_at"
     t.index ["ip_address"], name: "index_ip_addresses_on_ip_address", unique: true
   end
 
@@ -186,10 +185,8 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.datetime "original_created_from"
     t.datetime "original_created_before"
     t.datetime "updated_at", null: false
-    t.integer "version_no", null: false
     t.index ["uploaded_user_id"], name: "index_posts_on_uploaded_user_id"
     t.index ["url"], name: "index_posts_on_url", unique: true
-    t.check_constraint "`version_no` > 0", name: "chk_posts_version_no_positive"
   end
 
   create_table "settings", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -264,10 +261,8 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.datetime "updated_at", null: false
     t.integer "post_count", default: 0, null: false
     t.datetime "discarded_at"
-    t.integer "version_no", null: false
     t.index ["discarded_at"], name: "index_tags_on_discarded_at"
     t.index ["tag_name_id"], name: "index_tags_on_tag_name_id", unique: true
-    t.check_constraint "`version_no` > 0", name: "chk_tags_version_no_positive"
   end
 
   create_table "theatre_comments", primary_key: ["theatre_id", "no"], charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -337,10 +332,9 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.string "name"
     t.string "inheritance_code", limit: 64, null: false
     t.string "role", null: false
-    t.datetime "banned_at"
+    t.boolean "banned", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
-    t.index ["banned_at"], name: "index_users_on_banned_at"
   end
 
   create_table "wiki_assets", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|
@@ -373,12 +367,10 @@ ActiveRecord::Schema[8.0].define(version: 2026_05_07_213300) do
     t.datetime "updated_at", null: false
     t.datetime "discarded_at"
     t.integer "next_asset_no", default: 1, null: false
-    t.integer "version_no", 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
     t.index ["updated_user_id"], name: "index_wiki_pages_on_updated_user_id"
-    t.check_constraint "`version_no` > 0", name: "chk_wiki_pages_version_no_positive"
   end
 
   create_table "wiki_revision_lines", charset: "utf8mb4", collation: "utf8mb4_0900_ai_ci", force: :cascade do |t|

backend/spec/factories/ip_addresses.rb

@@ -1,10 +0,0 @@
-FactoryBot.define do
-  factory :ip_address do
-    ip_address { IPAddr.new('203.0.113.10').hton }
-    banned_at { nil }
-
-    trait :banned do
-      banned_at { Time.current }
-    end
-  end
-end

backend/spec/factories/users.rb

@@ -1,24 +1,15 @@
 FactoryBot.define do
   factory :user do
-    name { nil }
+    name { "test-user" }
     inheritance_code { SecureRandom.uuid }
-    role { 'guest' }
-    banned_at { nil }
-
-    trait :guest do
-      role { 'guest' }
-    end
+    role { "guest" }
 
     trait :member do
-      role { 'member' }
+      role { "member" }
     end
 
     trait :admin do
       role { 'admin' }
     end
-
-    trait :banned do
-      banned_at { Time.current }
-    end
   end
 end

backend/spec/requests/posts_spec.rb

@@ -10,10 +10,6 @@ RSpec.describe 'Posts API', type: :request do
     allow_any_instance_of(Post).to receive(:resized_thumbnail!).and_return(true)
   end
 
-  def create_nico_tag!(name)
-    Tag.find_or_create_by_tag_name!(name, category: :nico)
-  end
-
   def dummy_upload
     # 中身は何でもいい（加工処理はスタブしてる）
     Rack::Test::UploadedFile.new(StringIO.new('dummy'), 'image/jpeg', original_filename: 'dummy.jpg')
@@ -27,8 +23,7 @@ RSpec.describe 'Posts API', type: :request do
     Post.create!(title:, url:)
   end
 
-  def create_post_version_for!(post)
-    version =
+  def create_post_version_for! post
     PostVersion.create!(
       post:,
       version_no: 1,
@@ -41,20 +36,8 @@ RSpec.describe 'Posts API', type: :request do
       original_created_from: post.original_created_from,
       original_created_before: post.original_created_before,
       created_at: post.created_at,
-            created_by_user: post.uploaded_user)
-
-    post.update_columns(version_no: version.version_no) if post.has_attribute?(:version_no)
-    post.version_no = version.version_no if post.respond_to?(:version_no=)
-
-    version
-  end
-
-  def post_update_params(post, params = { })
-    base_version =
-        post.post_versions.order(version_no: :desc).first ||
-        create_post_version_for!(post.reload)
-
-    post_write_params({ base_version_no: base_version.version_no }.merge(params))
+      created_by_user: post.uploaded_user
+    )
   end
 
   let!(:tag_name) { TagName.create!(name: 'spec_tag') }
@@ -823,26 +806,24 @@ RSpec.describe 'Posts API', type: :request do
 
     it '401 when not logged in' do
       sign_out
-      put "/posts/#{post_record.id}", params: post_update_params(
-          post_record, title: 'updated', tags: 'spec_tag')
+      put "/posts/#{post_record.id}", params: post_write_params(title: 'updated', tags: 'spec_tag')
       expect(response).to have_http_status(:unauthorized)
     end
 
     it '403 when not member' do
       sign_in_as(create(:user, role: 'guest'))
-      put "/posts/#{post_record.id}", params: post_update_params(
-          post_record, title: 'updated', tags: 'spec_tag')
+      put "/posts/#{post_record.id}", params: post_write_params(title: 'updated', tags: 'spec_tag')
       expect(response).to have_http_status(:forbidden)
     end
 
     it '200 and updates title + resync tags when member' do
       sign_in_as(member)
 
+      # 追加で別タグも作って、更新時に入れ替わることを見る
       tn2 = TagName.create!(name: 'spec_tag_2')
       Tag.create!(tag_name: tn2, category: :general)
 
-      put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+      put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag_2')
 
@@ -850,6 +831,7 @@ RSpec.describe 'Posts API', type: :request do
       expect(json).to have_key('tags')
       expect(json['tags']).to be_an(Array)
 
+      # show と同様、update 後レスポンスもツリー形式
       names = json['tags'].map { |n| n['name'] }
       expect(names).to include('spec_tag_2')
     end
@@ -864,10 +846,10 @@ RSpec.describe 'Posts API', type: :request do
       it 'return 400' do
         sign_in_as(member)
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-            post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
-            tags: 'nico:nico_tag')
+          tags: 'nico:nico_tag'
+        )
 
         expect(response).to have_http_status(:bad_request), response.body
       end
@@ -905,11 +887,11 @@ RSpec.describe 'Posts API', type: :request do
       it 'replaces parent posts' do
         sign_in_as(member)
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-            post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
-            parent_post_ids: "#{new_parent_post_1.id} #{new_parent_post_2.id}")
+          parent_post_ids: "#{new_parent_post_1.id} #{new_parent_post_2.id}"
+        )
 
         expect(response).to have_http_status(:ok)
 
@@ -926,8 +908,7 @@ RSpec.describe 'Posts API', type: :request do
       it 'clears parent posts when parent_post_ids is blank' do
         sign_in_as(member)
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
           parent_post_ids: ''
@@ -941,8 +922,7 @@ RSpec.describe 'Posts API', type: :request do
         sign_in_as(member)
         create_post_version_for!(post_record.reload)
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
           parent_post_ids: "#{new_parent_post_1.id} #{new_parent_post_2.id}"
@@ -963,10 +943,7 @@ RSpec.describe 'Posts API', type: :request do
       it 'returns 422' do
         sign_in_as(member)
 
-        base_version = create_post_version_for!(post_record.reload)
-
         put "/posts/#{post_record.id}", params: {
-            base_version_no: base_version.version_no,
             title: 'updated title',
             tags: 'spec_tag' }
 
@@ -989,8 +966,7 @@ RSpec.describe 'Posts API', type: :request do
           parent_post:
         )
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
           parent_post_ids: 'abc'
@@ -1015,8 +991,7 @@ RSpec.describe 'Posts API', type: :request do
           parent_post:
         )
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
           parent_post_ids: '999999999'
@@ -1031,8 +1006,7 @@ RSpec.describe 'Posts API', type: :request do
       it 'returns 422 and does not create self implication' do
         sign_in_as(member)
 
-        put "/posts/#{post_record.id}", params: post_update_params(
-          post_record,
+        put "/posts/#{post_record.id}", params: post_write_params(
           title: 'updated title',
           tags: 'spec_tag',
           parent_post_ids: post_record.id.to_s
@@ -1046,221 +1020,6 @@ RSpec.describe 'Posts API', type: :request do
         )).to be(false)
       end
     end
-
-    context 'with optimistic locking' do
-      let!(:no_deerjikist_tag) { Tag.no_deerjikist }
-
-      before do
-        PostTag.create!(post: post_record, tag: no_deerjikist_tag)
-      end
-
-      it '400 when base_version_no is missing without force' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'updated title',
-            tags: 'spec_tag')
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it '400 when force and merge are both true' do
-        sign_in_as(member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'updated title',
-            tags: 'spec_tag',
-            force: '1',
-            merge: '1')
-
-        expect(response).to have_http_status(:bad_request)
-      end
-
-      it '409 when scalar fields are changed both by current and incoming updates' do
-        sign_in_as(member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        post_record.update!(title: 'updated by other user')
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: 'updated by me',
-            tags: "spec_tag #{Tag.no_deerjikist.name}")
-
-        expect(response).to have_http_status(:conflict)
-
-        expect(json.fetch('error')).to eq('conflict')
-        expect(json.fetch('base_version_no')).to eq(base_version.version_no)
-        expect(json.fetch('current_version_no')).to eq(2)
-        expect(json.fetch('mergeable')).to be(false)
-
-        conflict_fields = json.fetch('conflicts').map { |change| change.fetch('field') }
-        expect(conflict_fields).to include('title')
-
-        expect(post_record.reload.title).to eq('updated by other user')
-      end
-
-      it 'returns 409 with mergeable true when stale tag changes do not conflict but merge is not requested' do
-        sign_in_as(member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        current_tag = Tag.find_or_create_by_tag_name!('current_added_tag', category: :general)
-        PostTag.create!(post: post_record, tag: current_tag, created_user: member)
-
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: post_record.title,
-            tags: "spec_tag #{Tag.no_deerjikist.name} incoming_added_tag")
-
-        expect(response).to have_http_status(:conflict)
-
-        expect(json.fetch('mergeable')).to be(true)
-
-        tag_change = json.fetch('changes').find { |change| change.fetch('field') == 'tag_names' }
-        expect(tag_change).to be_present
-        expect(tag_change.fetch('conflict')).to be(false)
-        expect(tag_change.fetch('added_by_current')).to include('current_added_tag')
-        expect(tag_change.fetch('added_by_me')).to include('incoming_added_tag')
-      end
-
-      it 'merges non-conflicting stale tag changes when merge is true' do
-        sign_in_as(member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        current_tag = Tag.find_or_create_by_tag_name!('current_merge_tag', category: :general)
-        PostTag.create!(post: post_record, tag: current_tag, created_user: member)
-
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: post_record.title,
-            tags: "spec_tag #{Tag.no_deerjikist.name} incoming_merge_tag",
-            merge: '1')
-
-        expect(response).to have_http_status(:ok)
-
-        names = post_record.reload.tags.map(&:name)
-
-        expect(names).to include('spec_tag')
-        expect(names).to include(Tag.no_deerjikist.name)
-        expect(names).to include('current_merge_tag')
-        expect(names).to include('incoming_merge_tag')
-      end
-
-      it 'does not conflict when only nico tags changed after the base version' do
-        sign_in_as(member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        nico_tag = create_nico_tag!('nico:optimistic_lock_nico')
-        PostTag.create!(post: post_record, tag: nico_tag, created_user: member)
-
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-        expect(post_record.reload.version_no).to eq(2)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: post_record.title,
-            tags: "spec_tag #{ Tag.no_deerjikist.name }")
-
-        expect(response).to have_http_status(:ok)
-
-        names = post_record.reload.tags.map(&:name)
-
-        expect(names).to include('spec_tag')
-        expect(names).to include(Tag.no_deerjikist.name)
-        expect(names).to include(nico_tag.name)
-      end
-
-      it 'keeps nico tags even when they are not included in PUT tags' do
-        sign_in_as(member)
-
-        nico_tag = create_nico_tag!('nico:readonly_update_nico')
-        PostTag.create!(post: post_record, tag: nico_tag, created_user: member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: 'updated title',
-            tags: "spec_tag #{ Tag.no_deerjikist.name }")
-
-        expect(response).to have_http_status(:ok)
-
-        names = post_record.reload.tags.map(&:name)
-
-        expect(names).to include('spec_tag')
-        expect(names).to include(Tag.no_deerjikist.name)
-        expect(names).to include(nico_tag.name)
-      end
-
-      it 'allows non-nico tags linked from nico tags to be removed by normal post update' do
-        sign_in_as(member)
-
-        nico_tag = create_nico_tag!('nico:relation_source')
-        linked_tag = Tag.find_or_create_by_tag_name!('relation_linked_tag', category: :general)
-
-        NicoTagRelation.create!(nico_tag:, tag: linked_tag)
-        PostTag.create!(post: post_record, tag: nico_tag, created_user: member)
-        PostTag.create!(post: post_record, tag: linked_tag, created_user: member)
-
-        base_version = create_post_version_for!(post_record.reload)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
-            title: post_record.title,
-            tags: "spec_tag #{ Tag.no_deerjikist.name }")
-
-        expect(response).to have_http_status(:ok)
-
-        names = post_record.reload.tags.map(&:name)
-
-        expect(names).to include(nico_tag.name)
-        expect(names).to include('spec_tag')
-        expect(names).to include(Tag.no_deerjikist.name)
-        expect(names).not_to include(linked_tag.name)
-      end
-
-      it 'force-updates stale posts without base_version_no' do
-        sign_in_as(member)
-
-        create_post_version_for!(post_record.reload)
-
-        post_record.update!(title: 'updated by other user')
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-        put "/posts/#{post_record.id}", params: post_write_params(
-            title: 'forced title',
-            tags: "spec_tag #{Tag.no_deerjikist.name}",
-            force: '1')
-
-        expect(response).to have_http_status(:ok)
-        expect(post_record.reload.title).to eq('forced title')
-      end
-    end
   end
 
   describe 'GET /posts/random' do
@@ -1675,14 +1434,13 @@ RSpec.describe 'Posts API', type: :request do
 
     it 'creates next version on PUT /posts/:id when snapshot changes' do
       sign_in_as(member)
-      base_version = create_post_version_for!(post_record)
+      create_post_version_for!(post_record)
 
       tag_name2 = TagName.create!(name: 'spec_tag_2')
       Tag.create!(tag_name: tag_name2, category: :general)
 
       expect do
         put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
             title: 'updated title',
             tags: 'spec_tag_2')
       end.to change(PostVersion, :count).by(1)
@@ -1701,15 +1459,13 @@ RSpec.describe 'Posts API', type: :request do
       sign_in_as(member)
 
       PostTag.create!(post: post_record, tag: Tag.no_deerjikist)
-      base_version = create_post_version_for!(post_record.reload)
+      create_post_version_for!(post_record.reload)
 
       expect {
         put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
             title: post_record.title,
             tags: 'spec_tag')
       }.not_to change(PostVersion, :count)
-
       expect(response).to have_http_status(:ok)
 
       version = post_record.reload.post_versions.order(:version_no).last
@@ -1734,11 +1490,10 @@ RSpec.describe 'Posts API', type: :request do
 
     it 'does not create a version when PUT /posts/:id is invalid' do
       sign_in_as(member)
-      base_version = create_post_version_for!(post_record)
+      create_post_version_for!(post_record)
 
       expect do
         put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
             title: 'updated title',
             tags: 'spec_tag',
             original_created_from: Time.zone.local(2020, 1, 2, 0, 0, 0).iso8601,
@@ -1752,22 +1507,46 @@ RSpec.describe 'Posts API', type: :request do
   describe 'tag versioning from post write actions' do
     let(:member) { create(:user, :member) }
 
-    it 'creates tag snapshot for normalised tags on PUT /posts/:id' do
+    it 'creates tag snapshot for normalised tags on POST /posts' do
       sign_in_as(member)
 
-      base_version = create_post_version_for!(post_record.reload)
+      expect {
+        post '/posts', params: post_write_params(
+            title: 'tag versioned post',
+            url: 'https://example.com/tag-versioned-post',
+            tags: 'spec_tag',
+            thumbnail: dummy_upload)
+      }.to change { tag.reload.tag_versions.count }.by(1)
+
+      expect(response).to have_http_status(:created)
+
+      version = tag.reload.tag_versions.order(:version_no).last
+      expect(version.version_no).to eq(1)
+      expect(version.event_type).to eq('create')
+      expect(version.name).to eq('spec_tag')
+      expect(version.category).to eq('general')
+      expect(version.created_by_user_id).to eq(member.id)
+    end
+
+    it 'creates tag snapshot for normalised tags on PUT /posts/:id' do
+      sign_in_as(member)
 
       tag_name2 = TagName.create!(name: 'spec_tag_2')
       tag2 = Tag.create!(tag_name: tag_name2, category: :general)
 
       expect {
         put "/posts/#{post_record.id}", params: post_write_params(
-            base_version_no: base_version.version_no,
             title: 'updated title',
             tags: 'spec_tag_2')
       }.to change { tag2.reload.tag_versions.count }.by(1)
 
-      expect(response).to have_http_status(:ok), response.body
+      expect(response).to have_http_status(:ok)
+
+      version = tag2.reload.tag_versions.order(:version_no).last
+      expect(version.version_no).to eq(1)
+      expect(version.event_type).to eq('create')
+      expect(version.name).to eq('spec_tag_2')
+      expect(version.created_by_user_id).to eq(member.id)
     end
   end
 end

backend/spec/requests/tag_versions_spec.rb

@@ -26,7 +26,6 @@ RSpec.describe 'TagVersions API', type: :request do
     created_by_user:,
     created_at:
   )
-    version =
     TagVersion.create!(
       tag: tag,
       version_no: version_no,
@@ -36,12 +35,8 @@ RSpec.describe 'TagVersions API', type: :request do
       aliases: Array(aliases).join(' '),
       parent_tag_ids: Array(parent_tags).map(&:id).join(' '),
       created_by_user: created_by_user,
-            created_at: created_at)
-
-    tag.update_columns(version_no: version_no) if tag.has_attribute?(:version_no)
-    tag.version_no = version_no if tag.respond_to?(:version_no=)
-
-    version
+      created_at: created_at
+    )
   end
 
   let!(:v1) do

backend/spec/requests/users_spec.rb

@@ -1,266 +1,109 @@
-require 'rails_helper'
-
-RSpec.describe 'Users', type: :request do
-  let(:remote_ip) { '203.0.113.10' }
-
-  before do
-    allow_any_instance_of(ActionDispatch::Request)
-      .to receive(:remote_ip)
-      .and_return(remote_ip)
-  end
-
-  def auth_headers(user)
-    { 'X-Transfer-Code' => user.inheritance_code }
-  end
-
-  describe 'POST /users' do
-    it 'creates guest user, IpAddress and UserIp, and returns code' do
-      expect {
-        post '/users'
-      }.to change(User, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-        .and change(UserIp, :count).by(1)
+require "rails_helper"
 
+RSpec.describe "Users", type: :request do
+  describe "POST /users" do
+    it "creates guest user and returns code" do
+      post "/users"
       expect(response).to have_http_status(:created)
-      expect(json['code']).to be_present
-      expect(json['user']['role']).to eq('guest')
-
-      user = User.last
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-
-      expect(user.role).to eq('guest')
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'returns 403 and does not create user when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      expect {
-        post '/users'
-      }.not_to change(User, :count)
-
-      expect(response).to have_http_status(:forbidden)
-      expect(UserIp.count).to eq(0)
+      expect(json["code"]).to be_present
+      expect(json["user"]["role"]).to eq("guest")
     end
   end
 
-  describe 'POST /users/code/renew' do
-    it 'returns 401 when not logged in' do
-      post '/users/code/renew'
+  describe "POST /users/code/renew" do
+    it "returns 401 when not logged in" do
+      sign_out
+      post "/users/code/renew"
+      expect(response).to have_http_status(:unauthorized)
+    end
+  end
 
+  describe "PUT /users/:id" do
+    let(:user) { create(:user, name: "old-name", role: "guest") }
+
+    it "returns 401 when current_user id mismatch" do
+      sign_in_as(create(:user))
+      put "/users/#{user.id}", params: { name: "new-name" }
       expect(response).to have_http_status(:unauthorized)
     end
 
-    it 'returns 403 when current user is banned' do
-      user = create(:user, :banned)
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      post '/users/code/renew', headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-  end
-
-  describe 'PUT /users/:id' do
-    let(:user) { create(:user, name: 'old-name', role: 'guest') }
-
-    it 'returns 401 when current_user id mismatch' do
-      other_user = create(:user)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(other_user)
-
-      expect(response).to have_http_status(:unauthorized)
-    end
-
-    it 'returns 400 when name is blank' do
-      put "/users/#{user.id}",
-          params: { name: '   ' },
-          headers: auth_headers(user)
-
+    it "returns 400 when name is blank" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "   " }
       expect(response).to have_http_status(:bad_request)
     end
 
-    it 'updates name and returns user slice' do
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
+    it "updates name and returns 201 with user slice" do
+      sign_in_as(user)
+      put "/users/#{user.id}", params: { name: "new-name" }
 
       expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('new-name')
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("new-name")
 
       user.reload
-      expect(user.name).to eq('new-name')
-    end
-
-    it 'returns 403 when current user is banned' do
-      user.update!(banned_at: Time.current)
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      put "/users/#{user.id}",
-          params: { name: 'new-name' },
-          headers: auth_headers(user)
-
-      expect(response).to have_http_status(:forbidden)
-
-      user.reload
-      expect(user.name).to eq('old-name')
+      expect(user.name).to eq("new-name")
     end
   end
 
-  describe 'POST /users/verify' do
-    it 'returns valid:false when code not found' do
-      post '/users/verify', params: { code: 'nope' }
-
+  describe "POST /users/verify" do
+    it "returns valid:false when code not found" do
+      post "/users/verify", params: { code: "nope" }
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(false)
+      expect(json["valid"]).to eq(false)
     end
 
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
+    it "creates IpAddress and UserIp, and returns valid:true with user slice" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
 
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
+      # request.remote_ip を固定
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
 
       expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'returns 403 when verified user is banned' do
-      user = create(
-        :user,
-        :banned,
-        inheritance_code: SecureRandom.uuid,
-        role: 'guest'
-      )
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:forbidden)
-    end
-
-    it 'creates IpAddress and UserIp, and returns valid:true with user slice' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.to change(UserIp, :count).by(1)
-        .and change(IpAddress, :count).by(1)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-      expect(json['user']['id']).to eq(user.id)
-      expect(json['user']['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['user']['role']).to eq('guest')
-
-      ip_address = IpAddress.find_by(ip_address: IPAddr.new(remote_ip).hton)
-      expect(ip_address).to be_present
-      expect(UserIp.exists?(user:, ip_address:)).to eq(true)
-    end
-
-    it 'is idempotent for same user and same IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
-      }.not_to change(UserIp, :count)
-
-      expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
-    end
-
-    it 'creates another UserIp for same user and different IP address' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, role: 'guest')
-
-      post '/users/verify', params: { code: user.inheritance_code }
-      expect(response).to have_http_status(:ok)
-
-      allow_any_instance_of(ActionDispatch::Request)
-        .to receive(:remote_ip)
-        .and_return('203.0.113.11')
-
-      expect {
-        post '/users/verify', params: { code: user.inheritance_code }
+        post "/users/verify", params: { code: user.inheritance_code }
       }.to change(UserIp, :count).by(1)
 
       expect(response).to have_http_status(:ok)
-      expect(json['valid']).to eq(true)
+      expect(json["valid"]).to eq(true)
+      expect(json["user"]["id"]).to eq(user.id)
+      expect(json["user"]["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["user"]["role"]).to eq("guest")
+
+      # ついでに IpAddress もできてることを確認（ipの保存形式がバイナリでも count で見れる）
+      expect(IpAddress.count).to be >= 1
+    end
+
+    it "is idempotent for same user+ip (does not create duplicate UserIp)" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, role: "guest")
+      allow_any_instance_of(ActionDispatch::Request).to receive(:remote_ip).and_return("203.0.113.10")
+
+      post "/users/verify", params: { code: user.inheritance_code }
+      expect(response).to have_http_status(:ok)
+
+      expect {
+        post "/users/verify", params: { code: user.inheritance_code }
+      }.not_to change(UserIp, :count)
+
+      expect(response).to have_http_status(:ok)
+      expect(json["valid"]).to eq(true)
     end
   end
 
-  describe 'GET /users/me' do
-    it 'returns 404 when code not found' do
-      get '/users/me', params: { code: 'nope' }
-
+  describe "GET /users/me" do
+    it "returns 404 when code not found" do
+      get "/users/me", params: { code: "nope" }
       expect(response).to have_http_status(:not_found)
     end
 
-    it 'returns user slice when found' do
-      user = create(:user, inheritance_code: SecureRandom.uuid, name: 'me', role: 'guest')
-
-      get '/users/me', params: { code: user.inheritance_code }
+    it "returns user slice when found" do
+      user = create(:user, inheritance_code: SecureRandom.uuid, name: "me", role: "guest")
+      get "/users/me", params: { code: user.inheritance_code }
 
       expect(response).to have_http_status(:ok)
-      expect(json['id']).to eq(user.id)
-      expect(json['name']).to eq('me')
-      expect(json['inheritance_code']).to eq(user.inheritance_code)
-      expect(json['role']).to eq('guest')
-    end
-
-    it 'returns 403 when current IP address is banned' do
-      user = create(:user, inheritance_code: SecureRandom.uuid)
-
-      IpAddress.create!(
-        ip_address: IPAddr.new(remote_ip).hton,
-        banned_at: Time.current
-      )
-
-      get '/users/me', params: { code: user.inheritance_code }
-
-      expect(response).to have_http_status(:forbidden)
+      expect(json["id"]).to eq(user.id)
+      expect(json["name"]).to eq("me")
+      expect(json["inheritance_code"]).to eq(user.inheritance_code)
+      expect(json["role"]).to eq("guest")
     end
   end
 end

backend/spec/services/version_recorder_spec.rb

@@ -1,85 +0,0 @@
-require 'rails_helper'
-
-RSpec.describe VersionRecorder do
-  let(:member) { create(:user, :member) }
-
-  let(:post_record) do
-    Post.create!(
-        title: 'version recorder post',
-        url: 'https://example.com/version-recorder-post')
-  end
-
-  it 'updates record version_no when creating the first version' do
-    version =
-        PostVersionRecorder.record!(
-            post: post_record,
-            event_type: :create,
-            created_by_user: member)
-
-    expect(version.version_no).to eq(1)
-    expect(post_record.reload.version_no).to eq(1)
-  end
-
-  it 'updates record version_no when creating the next version' do
-    PostVersionRecorder.record!(
-        post: post_record,
-        event_type: :create,
-        created_by_user: member)
-
-    post_record.update!(title: 'updated version recorder post')
-
-    version =
-        PostVersionRecorder.record!(
-            post: post_record.reload,
-            event_type: :update,
-            created_by_user: member)
-
-    expect(version.version_no).to eq(2)
-    expect(post_record.reload.version_no).to eq(2)
-  end
-
-  it 'does not create a new version or advance version_no when snapshot is unchanged' do
-    first =
-        PostVersionRecorder.record!(
-            post: post_record,
-            event_type: :create,
-            created_by_user: member)
-
-    expect {
-      version =
-          PostVersionRecorder.record!(
-              post: post_record.reload,
-              event_type: :update,
-              created_by_user: member)
-
-      expect(version).to eq(first)
-    }.not_to change(PostVersion, :count)
-
-    expect(post_record.reload.version_no).to eq(1)
-  end
-
-  it 'raises when record version_no is older than the latest version' do
-    PostVersionRecorder.record!(
-        post: post_record,
-        event_type: :create,
-        created_by_user: member)
-
-    post_record.update!(title: 'updated once')
-
-    PostVersionRecorder.record!(
-        post: post_record.reload,
-        event_type: :update,
-        created_by_user: member)
-
-    post_record.update_columns(version_no: 1)
-
-    post_record.update!(title: 'updated with stale version_no')
-
-    expect {
-      PostVersionRecorder.record!(
-          post: post_record.reload,
-          event_type: :update,
-          created_by_user: member)
-    }.to raise_error(RuntimeError, /version_no/)
-  end
-end

backend/spec/support/test_records.rb

@@ -2,12 +2,14 @@ module TestRecords
   def create_member_user!
     User.create!(name: 'spec user',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'member')
+                 role: 'member',
+                 banned: false)
   end
 
   def create_admin_user!
     User.create!(name: 'spec admin',
                  inheritance_code: SecureRandom.hex(16),
-                 role: 'admin')
+                 role: 'admin',
+                 banned: false)
   end
 end

docs/codex-handoff.md

@@ -1,646 +0,0 @@
-# Codex handoff for BTRC Hub / タグ広場
-
-This document transfers project-specific context from prior ChatGPT-assisted design and review work to Codex.
-
-Use this file as project background.
-Use `AGENTS.md`, `backend/AGENTS.md`, and `frontend/AGENTS.md` for concrete coding rules and verification commands.
-
-## Project identity
-
-BTRC Hub / タグ広場 is a collaborative knowledge base for collecting, tagging, explaining, and rediscovering Bocchi the Rock creature-related works.
-
-It is not a generic SNS.
-It is not a comment board.
-It is not a service for rehosting external content.
-It is primarily a structured link, tag, wiki, material, and viewing-party system.
-
-Core domains:
-
-1. Posts
-2. Tags
-3. Wiki pages
-4. Materials
-5. Theatre / watch-party features
-
-The project is already publicly accessible and indexed by search engines, but it has not been broadly announced. Treat it as a small public production system, not a private prototype.
-
-## Current stack
-
-Backend:
-
-- Ruby 3.2.2
-- Rails 8.0.2 API
-- MySQL 8
-- Active Storage
-- Cloudflare R2 / S3-compatible storage is expected for uploaded files
-- RSpec
-
-Frontend:
-
-- React 19.1
-- Vite 6.3
-- TypeScript 5.8
-- Axios
-- TanStack Query
-- Tailwind CSS
-- Framer Motion
-- shadcn-like local components
-- react-markdown
-- react-markdown-editor-lite
-- remark-wiki-autolink
-
-Batch / background-like tasks:
-
-- Rake tasks
-- Nico sync
-- YouTube sync
-- Similarity calculation tasks
-
-## Repository working principle
-
-Before editing, inspect the existing implementation.
-
-Do not invent a new architecture when the current repo already has an established convention.
-
-Keep changes scoped to the requested issue.
-
-Prefer small, reviewable changes over broad rewrites.
-
-Do not perform unrelated cleanup in the same patch.
-
-When a task has design ambiguity, first produce a short investigation and recommended plan. Do not silently choose a risky design.
-
-## User coding preferences
-
-General:
-
-- Prefer single quotes for strings unless interpolation, escaping, or framework convention makes double quotes better.
-- Do not add production dependencies without explicit approval.
-- Do not perform broad formatting churn.
-- Do not convert unrelated files to a different style.
-
-Ruby:
-
-- Do not put a space before method-call parentheses.
-- Do not use `%w`.
-- Do not use `%i`.
-- Keep Rails code idiomatic, but preserve the user's style where the repo already uses it.
-
-TypeScript / Python:
-
-- The user prefers GNU-style spacing before parentheses where syntactically valid.
-- Preserve existing project formatting if a formatter or nearby code dictates otherwise.
-
-## Current authentication model
-
-The system does not use normal email/password authentication.
-
-Users are authenticated by inheritance code.
-
-Frontend:
-
-- Stores the code in `localStorage.user_code`.
-- Sends it as the `X-Transfer-Code` header.
-
-Backend:
-
-- Looks up `users.inheritance_code`.
-- Sets `current_user`.
-
-Roles:
-
-- `guest`
-- `member`
-- `admin`
-
-Important helper:
-
-- `User#gte_member?` returns true for `member` and `admin`.
-
-Never introduce a conventional login assumption unless the issue explicitly asks for it.
-
-## BAN / abuse-control model
-
-The backend currently enforces BAN at API level.
-
-The relevant before_action order is conceptually:
-
-1. Reject banned IP address.
-2. Authenticate user if transfer code exists.
-3. Reject banned user.
-
-Entities:
-
-- `users.banned_at`
-- `ip_addresses.banned_at`
-- `user_ips`
-
-IP addresses are stored as binary values using `IPAddr#hton`.
-
-Do not weaken BAN behavior.
-
-Do not move BAN checks behind optional authentication.
-
-Do not make preview, theatre, verify, user creation, or public-looking endpoints bypass BAN without an explicit design decision.
-
-## Public-operation assumptions
-
-Current practical operation:
-
-- A few editor accounts exist.
-- Meaningful editing is mostly done by the owner.
-- Read access is already public.
-- Search engines have indexed the site.
-- Future editor applications are expected through Discord.
-- Prospective editors are likely people known in the Bocchi creature community.
-
-This means security and moderation issues matter even if traffic is still small.
-
-## Core domain summary
-
-### Posts
-
-Posts are external URL-based link records.
-
-Important properties:
-
-- `url` is required and unique.
-- URLs are normalized.
-- Only HTTP / HTTPS are allowed.
-- Posts can have thumbnails through Active Storage.
-- `uploaded_user_id` may be NULL for synced or bot-created posts.
-- `original_created_from` and `original_created_before` represent a time range for original content creation.
-- When both original time bounds exist, `from < before` is required.
-
-Parent/child posts:
-
-- Current implementation uses `post_implications`.
-- It is many-to-many.
-- Do not assume `posts.parent_id`.
-- Frontend/API clients must send `parent_post_ids`, even when empty.
-- `parent_post_ids` is parsed as a space-separated ID string.
-- Self-parenting is invalid.
-- Missing parent IDs are invalid.
-
-Versions:
-
-- `post_versions` stores snapshots.
-- `version_no` is a per-post sequence.
-- Snapshot includes title, URL, thumbnail base, tags, parent post IDs, original time bounds, event type, and actor.
-- Optimistic locking for posts is planned / important, but do not assume it is fully implemented unless the code proves it.
-
-### Tags
-
-Tags are central.
-
-There is separation between tag names and tag entities:
-
-- `tag_names`
-- `tags`
-
-Categories:
-
-- `deerjikist`
-- `meme`
-- `character`
-- `general`
-- `material`
-- `nico`
-- `meta`
-
-Alias model:
-
-- `tag_names.canonical_id` expresses aliases.
-- `canonical_id = NULL` means canonical name.
-- `canonical_id != NULL` means alias.
-- An alias must not point to another alias.
-- A tag name that already has a tag or wiki page generally must not be aliasified.
-
-Tag normalization:
-
-- User-entered tags are normalized through existing backend logic.
-- Known aliases are canonicalized.
-- Parent tags are expanded recursively.
-- `nico:` is normally rejected for manual entry.
-- Special tags such as tag-request / bot / unknown-deerjikist / video / niconico / youtube must be protected.
-
-Do not casually change tag normalization, alias resolution, or parent expansion. These affect search, wiki, sync, and historical data.
-
-### Nico tags
-
-Nico tags use the `nico` category and have separate versioning.
-
-Important relation:
-
-- `nico_tag_relations` maps external Nico tags to internal tags.
-- `nico_tag_id` must be a Nico category tag.
-- `tag_id` must not be Nico category.
-
-Do not allow ordinary manual tag editing to create or corrupt Nico tags.
-
-### Deerjikists
-
-Deerjikists map external platform identities to internal `deerjikist` tags.
-
-Known platforms include:
-
-- `nico`
-- `youtube`
-
-YouTube handles may be normalized to `UC...` channel IDs.
-
-Do not treat user-facing handles and canonical channel IDs as interchangeable without checking existing code.
-
-### Wiki
-
-Wiki pages are a major knowledge layer.
-
-Important points:
-
-- Wiki pages are tied to tag-like titles.
-- Title handling, aliases, and canonical tag names matter.
-- There is line-level storage / revision-oriented behavior in the current implementation.
-- There has been design tension between wiki revisions and wiki versions.
-- Wiki conflict detection using `base_revision_id` exists on the backend side.
-- Frontend support for conflict detection must be verified before assuming it is complete.
-
-Do not redesign Wiki storage casually.
-
-Do not add a second competing history system.
-
-Do not break existing wiki URLs.
-
-### Materials
-
-Materials connect files or reference URLs to `material` or `character` tags.
-
-Important properties:
-
-- A material has a `tag_id`.
-- The tag must be `material` or `character`.
-- A material requires either `url` or attached `file`.
-- Active Storage is involved.
-- Upload/security policy matters more than plain link posting.
-
-Important unresolved/risky area:
-
-- Material creation permissions have historically been risky because upload endpoints can be abused.
-- Prefer `member` or higher for material creation unless the issue explicitly says otherwise.
-
-### Theatre
-
-Theatre is an experimental watch-party style feature.
-
-Known pieces include:
-
-- Display
-- Presence
-- Next post
-- Comments
-- Host-like control
-
-Do not assume theatre has complete CRUD/admin support unless the code proves it.
-
-Theatre may become expensive if next-item selection uses random DB ordering.
-
-## Current high-risk areas
-
-Treat these areas with extra care.
-
-### Security
-
-- Preview API SSRF protection.
-- External iframe / embed CSP.
-- Markdown link safety.
-- BAN / IP BAN bypass.
-- Transfer-code leakage.
-- Guest write access.
-- Upload endpoints.
-- Admin-only tag operations.
-- System tag mutation.
-
-### Data integrity
-
-- Tag alias canonicalization.
-- Tag parent expansion.
-- Post parent many-to-many relationships.
-- Version tables.
-- `version_no` synchronization.
-- Schema drift from branch migration contamination.
-- Wiki revision/version split.
-- Material version recording.
-
-### Frontend correctness
-
-- React Hooks must not be called conditionally.
-- Role guards are currently spread across components/pages.
-- TanStack Query keys must not collide between ID/name or ID/title variants.
-- URL path segments containing tag names or wiki titles must use `encodeURIComponent`.
-- API response types may allow `null` users for bot or migration data.
-- Tag autocomplete has had duplicated logic and stale state hazards.
-
-### Performance
-
-- Avoid unbounded `limit`.
-- Avoid `order('RAND()')` for growing tables.
-- Avoid loading full relations just to count.
-- Avoid Ruby-side sorting/paging for large histories.
-- Tag sidebar client-side aggregation can become expensive.
-- Wiki full-text search needs deliberate indexing/design.
-
-## Current priority order
-
-Use this as the default priority unless an issue says otherwise.
-
-### P0: Safety before broad announcement
-
-1. Preview API SSRF hardening.
-2. Material creation permission tightening.
-3. System tag mutation holes.
-4. `GET /users/me` transfer-code leakage through query params.
-5. Limit caps for index/history/comment APIs.
-6. CSP / iframe sandbox policy.
-7. Confirm BAN enforcement remains global.
-
-### P1: Core correctness
-
-1. Post optimistic locking with `version_no`.
-2. Wiki edit conflict handling.
-3. Wiki history/revision model clarification.
-4. Wiki search truthfulness: implement body search or remove false UI.
-5. Tag alias/canonical/wiki interaction.
-6. Tag URL encoding.
-7. TanStack Query key separation.
-8. Frontend null-user handling.
-9. React Hooks rule fixes.
-10. Material version policy.
-
-### P2: Operational/admin usability
-
-1. Admin screens for users, IPs, bans, aliases, and settings.
-2. Settings table and user settings usage.
-3. Better tag sidebar.
-4. Better role guard helpers.
-5. Better frontend tests.
-6. Better issue triage and closure of already-implemented issues.
-
-### P3: Future features
-
-1. Theatre list/create/edit/admin flow.
-2. Muted/hidden tags.
-3. Tag category custom colors.
-4. Responsive refinements.
-5. Watch-party improvements.
-6. Broader embed support.
-
-## Known issue triage notes
-
-Some existing issues may already be partially or mostly implemented.
-
-Before implementing an issue, check code first.
-
-Examples:
-
-- Tag search and OR/NOT search may already be mostly implemented.
-- BAN enforcement may have been implemented after earlier issue drafts.
-- YouTube sync exists and should not be treated as purely planned.
-- Parent posts are many-to-many in current schema, even if older issues mention one-to-many.
-- Some issues may reflect old schema or old branch state.
-
-When in doubt:
-
-1. Inspect current code.
-2. Inspect schema.
-3. Inspect routes.
-4. Inspect frontend usage.
-5. Report whether the issue is implemented, partially implemented, not implemented, or obsolete.
-6. Only then edit.
-
-## Verification expectations
-
-Backend changes:
-
-- Run RSpec when possible.
-- Add request specs for API behavior changes.
-- Add model specs for validation / normalization changes.
-- Check migrations and schema consistency.
-- Do not silently ignore pending migrations.
-
-Frontend changes:
-
-- Run build.
-- Run lint if configured.
-- Run tests if configured.
-- Add tests for important behavior when the test framework exists.
-- If frontend tests are not yet installed, state that clearly.
-
-Full-stack changes:
-
-- Verify both backend and frontend compile/test paths where possible.
-- Confirm API response shapes match TypeScript types.
-- Confirm authorization behavior on both server and UI.
-
-If commands cannot be run because dependencies are missing, report that explicitly. Do not pretend verification passed.
-
-## Branch / migration caution
-
-The project has previously suffered from schema contamination caused by running migrations from another branch.
-
-Be careful when touching:
-
-- `db/schema.rb`
-- migration files
-- parent post schema
-- banned / banned_at schema
-- version_no migrations
-- wiki asset schema
-
-Before changing migrations:
-
-1. Inspect current schema.
-2. Inspect existing migrations.
-3. Confirm whether the intended branch already includes related migrations.
-4. Prefer additive migrations for shared branches.
-5. Do not edit already-applied production migrations unless explicitly instructed.
-
-## API design principles
-
-Prefer explicit server-side authorization.
-
-Do not rely only on frontend hiding.
-
-Do not return sensitive codes unnecessarily.
-
-Use 403 for authorization failures.
-
-Use 422 for validation failures.
-
-Use 409 for edit conflicts.
-
-Do not expose internal exception messages to users.
-
-Clamp or reject abusive limits consistently.
-
-Keep response shape stable unless the issue explicitly includes a breaking API change.
-
-## Frontend design principles
-
-Use existing route and query-key conventions.
-
-Use TanStack Query `enabled` rather than conditional hook calls.
-
-Do not let role-based early returns change hook order.
-
-Centralize repeated tag autocomplete logic when touching it.
-
-Use `encodeURIComponent` for tag names and wiki titles in URL path segments.
-
-Prefer graceful fallback for nullable actors:
-
-- bot operation
-- deleted user
-- migration-created data
-- external sync
-
-Do not assume all API user fields are non-null.
-
-## Testing priorities to add over time
-
-Frontend tests are especially important because the backend already has more mature RSpec coverage.
-
-Suggested first frontend tests:
-
-1. Tag autocomplete.
-2. Post form tag editing.
-3. Tag URL encoding.
-4. Wiki edit conflict UI.
-5. Role guard behavior.
-6. Null-user history rendering.
-7. Dialog behavior.
-8. Top navigation responsive behavior.
-
-Backend test priorities:
-
-1. BAN enforcement across public-looking endpoints.
-2. Material permissions.
-3. Preview SSRF rejection.
-4. System tag protection.
-5. Post optimistic locking.
-6. Wiki conflict detection.
-7. Tag alias/canonical behavior.
-8. Limit caps.
-9. Parent post parsing.
-10. Version recorder behavior.
-
-## What Codex should not do without explicit approval
-
-Do not:
-
-- Replace Rails.
-- Replace React.
-- Replace TanStack Query.
-- Redesign the database.
-- Rewrite Wiki storage.
-- Remove version tables.
-- Change authentication model.
-- Change role names.
-- Change tag category names.
-- Add background job infrastructure.
-- Add a new UI framework.
-- Add a new test framework if one already exists.
-- Add major dependencies.
-- Change public URL design.
-- Change production storage configuration.
-- Remove historical data behavior.
-- Simplify BAN/security checks.
-- Treat the site as private-only.
-
-## Good first Codex tasks
-
-Start with investigation-only tasks.
-
-Example:
-
-```txt
-Inspect the repository and summarize the Rails, React, TypeScript, and test setup.
-Do not modify files.
-List commands that actually exist in this repository.
-List risks Codex should know before editing.
-```
-
-Then small safe patches:
-
-```txt
-Fix a React Hooks rule violation in one file.
-Keep behavior unchanged.
-Run the relevant frontend verification commands.
-```
-
-```txt
-Add encodeURIComponent around one tag-name URL path segment.
-Add or update a test if the project has a frontend test setup.
-Run build/lint.
-```
-
-```txt
-Add a request spec for a known authorization rule.
-Do not change implementation unless the spec fails for the expected reason.
-```
-
-Avoid starting with:
-
-- Wiki history redesign.
-- Post versioning redesign.
-- Full admin screen suite.
-- Broad frontend refactor.
-- Database cleanup.
-- Authentication rewrite.
-
-## Relationship with ChatGPT
-
-ChatGPT has been used for:
-
-- Design review.
-- Risk analysis.
-- Prioritization.
-- Specification reconstruction.
-- Migration/locking discussions.
-- Codex migration planning.
-
-Codex should be used mainly for:
-
-- Repository inspection.
-- Localized implementation.
-- Test addition.
-- Running verification commands.
-- Producing small reviewable diffs.
-
-For ambiguous architecture, Codex should stop and present options rather than implement a guessed design.
-
-## Current strategic stance
-
-The project should not be rewritten from scratch.
-
-The current Rails + React system is acceptable.
-
-The immediate goal is not elegance.
-The immediate goal is safe public operation, data integrity, and maintainable incremental improvement.
-
-Priority is:
-
-1. Prevent abuse/security incidents.
-2. Preserve data correctness.
-3. Make editing safe for multiple users.
-4. Add tests around fragile frontend behavior.
-5. Improve admin/operation workflows.
-6. Optimize performance after obvious dangerous patterns are removed.
-
-## Final rule
-
-When current code, old specs, issue drafts, and memory disagree, current code wins.
-
-When current code is unsafe, write that explicitly and propose a small safe fix.
-
-When the task is too broad, split it.
-
-When verification cannot be performed, say exactly what was not verified.

docs/commands.md

@@ -1,30 +0,0 @@
-# Commands
-
-## Backend
-
-```sh
-cd backend
-bundle install
-bundle exec rails db:migrate
-bundle exec rspec
-bundle exec rails routes
-```
-
-## Frontend
-
-```sh
-cd frontend
-npm install
-npm run dev
-npm run build
-npm run lint
-npm run test
-npm run test:run
-```
-
-### Full verification
-
-```sh
-cd backend && bundle exec rspec
-cd ../frontend && npm run test:run && npm run build && npm run lint
-```

docs/issue-workflow.md

@@ -1,80 +0,0 @@
-# Issue workflow
-
-## Source of truth
-
-Gitea Issues are the source of truth for tasks, discussions, labels, milestones, and status.
-
-Do not copy the full backlog into git.
-
-Repository documents may define:
-
-- issue templates
-- triage rules
-- Codex task format
-- verification rules
-- release checklist
-
-## Labels
-
-Recommended labels:
-
-- `P0`
-- `P1`
-- `P2`
-- `P3`
-- `security`
-- `data-integrity`
-- `backend`
-- `frontend`
-- `wiki`
-- `tags`
-- `materials`
-- `theatre`
-- `codex-ready`
-- `needs-design`
-- `blocked`
-- `good-first-codex-task`
-
-## Codex-ready criteria
-
-An issue can be labeled `codex-ready` only when it has:
-
-- clear background
-- target area
-- concrete tasks
-- acceptance criteria
-- verification commands
-- explicit non-goals
-- no unresolved architecture decision
-
-## Workflow
-
-1. Create or refine the issue in Gitea.
-2. Add labels and milestone.
-3. If design is unclear, label `needs-design`.
-4. Discuss design before implementation.
-5. When scoped enough, label `codex-ready`.
-6. Give Codex the issue URL or copied issue body.
-7. Codex creates a branch.
-8. Codex implements a small patch.
-9. Codex runs verification commands.
-10. Human reviews the diff.
-11. Merge.
-12. Close the issue from the PR/commit message.
-
-## Commit message
-
-Use issue references when possible:
-
-```txt
-fix: prevent preview SSRF
-
-Refs: #123
-```
-or
-```
-fix: prevent preview SSRF
-
-Closes: #123
-```
-depending on whether the change fully resolves the issue.

docs/release-checklist.md

@@ -1,8 +0,0 @@
-# Release checklist
-
-- [ ] Backend specs pass
-- [ ] Frontend build passes
-- [ ] No pending migrations
-- [ ] Preview API SSRF checked
-- [ ] BAN behavior checked
-- [ ] CSP checked

docs/roadmap.md

@@ -1,8 +0,0 @@
-# Roadmap
-
-## Public announcement readiness
-
-- Harden preview API
-- Tighten material creation permission
-- Add admin MVP
-- Improve frontend tests

frontend/AGENTS.md

@@ -1,95 +0,0 @@
-# frontend/AGENTS.md
-
-## Scope
-
-These rules apply to work under `frontend/`.
-
-This is a Vite + React + TypeScript app using TanStack Query, Tailwind CSS, Framer Motion, Radix UI-style components, MDX, and Zustand.
-
-## Commands
-
-Use only scripts that exist in `package.json`:
-
-```sh
-npm run dev
-npm run build
-npm run lint
-npm run preview
-```
-
-`npm run build` runs `tsc -b && vite build`, and `postbuild` runs `node scripts/generate-sitemap.js`.
-
-There is currently no `test` script in `package.json`. Do not run or report `npm test` unless a test script is added.
-
-After frontend changes, run:
-
-```sh
-npm run build
-npm run lint
-```
-
-If either command cannot be run or fails, report the exact command and failure.
-
-## TypeScript
-
-- TypeScript is strict. `tsconfig.app.json` enables `strict`, `noUnusedLocals`, `noUnusedParameters`, `erasableSyntaxOnly`, `noFallthroughCasesInSwitch`, and `noUncheckedSideEffectImports`.
-- Keep types explicit at module boundaries, API helpers, and exported utilities.
-- Use `import type` for type-only imports.
-- Prefer existing shared types from `src/types.ts` before adding local duplicate types.
-- Preserve the repository's existing spacing style in TypeScript, including GNU-style spacing before call parentheses where it is already used.
-- Prefer single quotes for strings unless interpolation or escaping makes double quotes better.
-
-## React
-
-- Use function components.
-- Existing page components commonly export an anonymous function satisfying `FC`; match nearby file style when editing.
-- React hooks must be called unconditionally and at the top level of components or custom hooks.
-- Keep page-level components under `src/pages`.
-- Keep shared and feature components under `src/components`.
-- Use `react-router-dom` route params and navigation patterns already present in `src/App.tsx`.
-- Encode URL path-segment values with `encodeURIComponent`.
-
-## TanStack Query
-
-- Use `@tanstack/react-query` for server state.
-- Query keys should come from `src/lib/queryKeys.ts`; add key builders there instead of using ad hoc arrays in components.
-- Fetch functions should live in domain helpers under `src/lib`, such as `posts.ts`, `tags.ts`, or `wiki.ts`.
-- Use `useQueryClient().invalidateQueries` with the shared root keys when mutations affect cached lists or detail views.
-- The app-wide `QueryClient` is configured in `src/main.tsx`; do not create additional clients in feature code.
-
-## API calls
-
-- Use `src/lib/api.ts` for HTTP calls.
-- The API wrapper attaches `X-Transfer-Code` from `localStorage` and converts non-blob responses to camelCase.
-- Send Rails snake_case params and request body keys where the backend expects them.
-- Do not bypass the API wrapper unless there is a specific reason, such as a third-party request outside the Rails API.
-- For blob responses, pass `responseType: 'blob'` so the wrapper does not camelCase the body.
-
-## Imports and aliases
-
-- The `@` alias points to `frontend/src`.
-- Prefer `@/...` imports for app code instead of long relative paths.
-- Keep type imports separate with `import type`.
-- Match existing import grouping: external packages, app modules, then type imports.
-
-## Tailwind and UI
-
-- Tailwind scans `src/**/*.{html,js,ts,jsx,tsx,mdx}`.
-- Use `cn` from `src/lib/utils.ts` for conditional class names and class merging.
-- Reuse components from `src/components/common`, `src/components/layout`, and `src/components/ui` before adding new primitives.
-- Keep Tailwind classes consistent with nearby components.
-- When adding dynamic tag color classes, update `tailwind.config.js` safelist if the class cannot be statically detected.
-- Do not introduce new UI libraries or production dependencies without approval.
-
-## Lint and build constraints
-
-- ESLint uses `@eslint/js`, `typescript-eslint`, `eslint-plugin-react-hooks`, and `eslint-plugin-react-refresh`.
-- The hooks rules are enforced; fix hook ordering instead of disabling the rule.
-- `react-refresh/only-export-components` is enabled as a warning with `allowConstantExport`.
-- Build failures from unused locals or unused parameters are TypeScript errors, not lint-only issues.
-
-## Files to avoid in routine work
-
-- Do not edit `dist/` output directly.
-- Do not inspect or modify `node_modules/` unless explicitly needed.
-- Keep generated build artifacts out of source changes unless the user asks for them.

frontend/eslint.config.js

@@ -5,7 +5,7 @@ import reactRefresh from 'eslint-plugin-react-refresh'
 import tseslint from 'typescript-eslint'
 
 export default tseslint.config(
-  { ignores: ['dist', 'tailwind.config.js'] },
+  { ignores: ['dist'] },
   {
     extends: [js.configs.recommended, ...tseslint.configs.recommended],
     files: ['**/*.{ts,tsx}'],

frontend/package.json

@@ -8,8 +8,6 @@
     "build": "tsc -b && vite build",
     "postbuild": "node scripts/generate-sitemap.js",
     "lint": "eslint .",
-    "test": "vitest",
-    "test:run": "vitest run",
     "preview": "vite preview"
   },
   "dependencies": {
@@ -47,10 +45,6 @@
   "devDependencies": {
     "@eslint/js": "^9.25.0",
     "@tailwindcss/typography": "^0.5.19",
-    "@testing-library/dom": "^10.4.1",
-    "@testing-library/jest-dom": "^6.9.1",
-    "@testing-library/react": "^16.3.2",
-    "@testing-library/user-event": "^14.6.1",
     "@types/axios": "^0.14.4",
     "@types/markdown-it": "^14.1.2",
     "@types/mdx": "^2.0.13",
@@ -64,13 +58,11 @@
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.19",
     "globals": "^16.0.0",
-    "jsdom": "^26.1.0",
     "postcss": "^8.5.3",
     "tailwindcss": "^3.4.13",
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.30.1",
-    "vite": "^6.3.5",
-    "vitest": "^4.1.5"
+    "vite": "^6.3.5"
   },
   "description": "This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.",
   "main": "eslint.config.js",

frontend/src/App.tsx

@@ -8,7 +8,6 @@ import { BrowserRouter,
 
 import RouteBlockerOverlay from '@/components/RouteBlockerOverlay'
 import TopNav from '@/components/TopNav'
-import DialogueProvider from '@/components/dialogues/DialogueProvider'
 import { Toaster } from '@/components/ui/toaster'
 import { apiPost, isApiError } from '@/lib/api'
 import DeerjikistDetailPage from '@/pages/deerjikists/DeerjikistDetailPage'
@@ -93,7 +92,7 @@ const PostDetailRoute = ({ user }: { user: User | null }) => {
 }
 
 
-const App: FC = () => {
+export default (() => {
   const [user, setUser] = useState<User | null> (null)
   const [status, setStatus] = useState (200)
 
@@ -139,9 +138,7 @@ const App: FC = () => {
   return (
       <>
 	<RouteBlockerOverlay/>
-
 	<BrowserRouter>
-	  <DialogueProvider>
 	  <LayoutGroup>
 	    <motion.div
 		layout="position"
@@ -151,11 +148,7 @@ const App: FC = () => {
 	      <RouteTransitionWrapper user={user} setUser={setUser}/>
 	    </motion.div>
 	  </LayoutGroup>
-
 	  <Toaster/>
-	  </DialogueProvider>
 	</BrowserRouter>
       </>)
-}
-
-export default App
+}) satisfies FC

frontend/src/components/DraggableDroppableTagRow.tsx

@@ -19,7 +19,7 @@ type Props = {
     sp?:              boolean }
 
 
-const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTagId, suppressClickRef, sp }) => {
+export default (({ tag, nestLevel, pathKey, parentTagId, suppressClickRef, sp }: Props) => {
   const dndId = `tag-node:${ pathKey }`
 
   const downPosRef = useRef<{ x: number; y: number } | null> (null)
@@ -96,6 +96,4 @@ const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTa
 	  <TagLink tag={tag} nestLevel={nestLevel}/>
 	</motion.div>
       </div>)
-}
-
-export default DraggableDroppableTagRow
+}) satisfies FC<Props>

frontend/src/components/ErrorScreen.test.tsx

@@ -1,32 +0,0 @@
-import { render, screen } from '@testing-library/react'
-import { HelmetProvider } from 'react-helmet-async'
-import { describe, expect, it } from 'vitest'
-
-import ErrorScreen from '@/components/ErrorScreen'
-
-describe ('ErrorScreen', () => {
-  it.each ([
-    [403, '権限ないよ（笑）'],
-    [404, 'ページないよ（笑）'],
-    [500, '鯖でエラー出たって（嘲笑）'],
-    [503, '鯖死んでるよ（泣）'],
-  ]) ('renders status %s', (status, message) => {
-    render (
-        <HelmetProvider>
-          <ErrorScreen status={status}/>
-        </HelmetProvider>,
-    )
-
-    expect (screen.getByText (String (status))).toBeInTheDocument ()
-    expect (screen.getByText (message)).toBeInTheDocument ()
-    expect (screen.getByAltText ('逃げたギター')).toBeInTheDocument ()
-  })
-
-  it ('throws for unsupported statuses', () => {
-    expect (() => render (
-        <HelmetProvider>
-          <ErrorScreen status={418}/>
-        </HelmetProvider>,
-    )).toThrow ()
-  })
-})

frontend/src/components/ErrorScreen.tsx

@@ -10,7 +10,7 @@ import type { FC } from 'react'
 type Props = { status: number }
 
 
-const ErrorScreen: FC<Props> = ({ status }) => {
+export default (({ status }: Props) => {
   const [message, rightMsg, leftMsg]: [string, string, string] = (() => {
     switch (status)
     {
@@ -58,6 +58,4 @@ const ErrorScreen: FC<Props> = ({ status }) => {
 	  <p className="mr-[-.5em]">{message}</p>
 	</div>
       </MainArea>)
-}
-
-export default ErrorScreen
+}) satisfies FC<Props>

frontend/src/components/MaterialSidebar.tsx

@@ -31,7 +31,7 @@ const setChildrenById = (
     }))
 
 
-const MaterialSidebar: FC = () => {
+export default (() => {
   const [tags, setTags] = useState<TagWithDepth[]> ([])
   const [openTags, setOpenTags] = useState<Record<number, boolean>> ({ })
   const [tagFetchedFlags, setTagFetchedFlags] = useState<Record<number, boolean>> ({ })
@@ -94,6 +94,4 @@ const MaterialSidebar: FC = () => {
 	  {renderTags (tags)}
 	</ul>
       </SidebarComponent>)
-}
-
-export default MaterialSidebar
+}) satisfies FC

frontend/src/components/MenuSeparator.tsx

@@ -1,11 +1,9 @@
 import type { FC } from 'react'
 
 
-const MenuSeparator: FC = () => (
+export default (() => (
     <>
       <span className="hidden md:inline flex items-center px-2">|</span>
       <hr className="block md:hidden w-full opacity-25
 		     border-t border-black dark:border-white"/>
-    </>)
-
-export default MenuSeparator
+    </>)) satisfies FC

frontend/src/components/PostEditForm.test.tsx

@@ -1,69 +0,0 @@
-import { fireEvent, render, screen, waitFor } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import PostEditForm from '@/components/PostEditForm'
-import { buildPost, buildTag } from '@/test/factories'
-
-const postsApi = vi.hoisted (() => ({
-  updatePost: vi.fn (),
-}))
-
-const api = vi.hoisted (() => ({
-  isApiError: vi.fn (() => false),
-}))
-
-const toastApi = vi.hoisted (() => ({
-  toast: vi.fn (),
-}))
-
-vi.mock ('@/lib/posts', () => postsApi)
-vi.mock ('@/lib/api', () => api)
-vi.mock ('@/components/ui/use-toast', () => toastApi)
-vi.mock ('@/components/dialogues/DialogueProvider', () => ({
-  useDialogue: () => ({
-    choice: vi.fn (),
-  }),
-}))
-
-describe ('PostEditForm', () => {
-  it ('submits edited post fields with the current base version', async () => {
-    const onSave = vi.fn ()
-    const post = buildPost ({
-      id:        8,
-      versionNo: 4,
-      title:     'old',
-      tags:      [
-        buildTag ({ name: 'general-tag', category: 'general' }),
-        buildTag ({ id: 2, name: 'nico-tag', category: 'nico' }),
-      ],
-      parentPosts: [buildPost ({ id: 2, title: 'parent' })],
-    })
-    postsApi.updatePost.mockResolvedValueOnce ({
-      ...post,
-      versionNo: 5,
-      title:     'new',
-      tags:      [buildTag ({ name: 'new-tag' })],
-    })
-
-    render (<PostEditForm post={post} onSave={onSave}/>)
-
-    const [title, parentIds] = screen.getAllByRole ('textbox')
-    fireEvent.change (title, { target: { value: 'new' } })
-    fireEvent.change (parentIds, { target: { value: '3 4' } })
-    fireEvent.submit (screen.getByRole ('button', { name: '更新' }).closest ('form')!)
-
-    await waitFor (() => {
-      expect (postsApi.updatePost).toHaveBeenCalledWith (
-          expect.objectContaining ({
-            id:            8,
-            title:         'new',
-            parentPostIds: '3 4',
-            tags:          'general-tag',
-          }),
-          { baseVersionNo: 4 },
-      )
-    })
-    expect (onSave).toHaveBeenCalledWith (expect.objectContaining ({ versionNo: 5 }))
-    expect (toastApi.toast).toHaveBeenCalledWith ({ description: '更新しました．' })
-  })
-})

frontend/src/components/PostEditForm.tsx

@@ -3,13 +3,11 @@ import { useEffect, useState } from 'react'
 import PostFormTagsArea from '@/components/PostFormTagsArea'
 import PostOriginalCreatedTimeField from '@/components/PostOriginalCreatedTimeField'
 import Label from '@/components/common/Label'
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { toast } from '@/components/ui/use-toast'
-import { isApiError } from '@/lib/api'
-import { updatePost } from '@/lib/posts'
+import { apiPut } from '@/lib/api'
 
-import type { FC, FormEvent } from 'react'
+import type { FC } from 'react'
 
 import type { Post, Tag } from '@/types'
 
@@ -33,8 +31,7 @@ type Props = { post:    Post
 	       onSave:  (newPost: Post) => void }
 
 
-const PostEditForm: FC<Props> = ({ post, onSave }) => {
-  const [disabled, setDisabled] = useState (false)
+export default (({ post, onSave }: Props) => {
   const [originalCreatedBefore, setOriginalCreatedBefore] =
       useState<string | null> (post.originalCreatedBefore)
   const [originalCreatedFrom, setOriginalCreatedFrom] =
@@ -44,14 +41,16 @@ const PostEditForm: FC<Props> = ({ post, onSave }) => {
   const [tags, setTags] = useState<string> ('')
   const [title, setTitle] = useState (post.title)
 
-  const dialogue = useDialogue ()
-
-  const update = async (...args: Parameters<typeof updatePost>) => {
+  const handleSubmit = async () => {
     try
     {
-      const data = await updatePost (...args)
+      const data = await apiPut<Post> (
+	  `/posts/${ post.id }`,
+	  { title, tags, parent_post_ids: parentPostIds,
+	    original_created_from: originalCreatedFrom,
+	    original_created_before: originalCreatedBefore },
+	  { headers: { 'Content-Type': 'multipart/form-data' } })
       onSave ({ ...post,
-		versionNo:              data.versionNo,
 		title:                  data.title,
 		tags:                   data.tags,
 		parentPosts:            data.parentPosts,
@@ -61,58 +60,9 @@ const PostEditForm: FC<Props> = ({ post, onSave }) => {
 		originalCreatedBefore:  data.originalCreatedBefore } as Post)
       toast ({ description: '更新しました．' })
     }
-    catch (e)
-    {
-      const response = isApiError<{ mergeable?: boolean }> (e) ? e.response : undefined
-
-      if (response?.status !== 409)
+    catch
     {
       toast ({ description: '更新はできなかったよ……' })
-	  return
-	}
-
-      const action = await dialogue.choice ({
-	  title: '競合が発生しました．',
-	  description: (
-	      <div>
-		<p>ほかの耕作員が先に更新してゐます．</p>
-		<p>現在の変更をどう扱ひますか?</p>
-	      </div>),
-	  choices: [...(response?.data?.mergeable ? [{ value: 'merge', label: '差分をマージ' }] : []),
-		    { value: 'overwrite', label: '強制上書き', variant: 'danger' }] })
-
-      if (action === 'merge')
-	{
-	  // TODO: 差分 UI
-	  await update ({ id: post.id, title, tags, parentPostIds,
-			  originalCreatedFrom, originalCreatedBefore },
-			{ baseVersionNo: post.versionNo, merge: true })
-	  return
-	}
-
-      if (action === 'overwrite')
-	{
-	  await update ({ id: post.id, title, tags, parentPostIds,
-			  originalCreatedFrom, originalCreatedBefore },
-			{ baseVersionNo: post.versionNo, force: true })
-	  return
-	}
-    }
-  }
-
-  const handleSubmit = async (e: FormEvent) => {
-    e.preventDefault ()
-
-    setDisabled (true)
-    try
-    {
-      await update ({ id: post.id, title, tags, parentPostIds,
-		      originalCreatedFrom, originalCreatedBefore },
-		    { baseVersionNo: post.versionNo })
-    }
-    finally
-    {
-      setDisabled (false)
     }
   }
 
@@ -121,13 +71,11 @@ const PostEditForm: FC<Props> = ({ post, onSave }) => {
   }, [post])
 
   return (
-      <form onSubmit={handleSubmit} className="max-w-xl pt-2 space-y-4">
+      <div className="max-w-xl pt-2 space-y-4">
 	{/* タイトル */}
 	<div>
 	  <Label>タイトル</Label>
-	  <input
-	      type="text"
-	      disabled={disabled}
+	  <input type="text"
 		 className="w-full border rounded p-2"
 		 value={title ?? ''}
 		 onChange={ev => setTitle (ev.target.value)}/>
@@ -138,33 +86,25 @@ const PostEditForm: FC<Props> = ({ post, onSave }) => {
 	  <Label>親投稿</Label>
 	  <input
 	      type="text"
-	      disabled={disabled}
 	      value={parentPostIds}
 	      onChange={e => setParentPostIds (e.target.value)}
 	      className="w-full border p-2 rounded"/>
 	</div>
 
 	{/* タグ */}
-	<PostFormTagsArea
-	    disabled={disabled}
-	    tags={tags}
-	    setTags={setTags}/>
+	<PostFormTagsArea tags={tags} setTags={setTags}/>
 
 	{/* オリジナルの作成日時 */}
 	<PostOriginalCreatedTimeField
-	    disabled={disabled}
 	    originalCreatedFrom={originalCreatedFrom}
 	    setOriginalCreatedFrom={setOriginalCreatedFrom}
 	    originalCreatedBefore={originalCreatedBefore}
 	    setOriginalCreatedBefore={setOriginalCreatedBefore}/>
 
 	{/* 送信 */}
-	<Button
-	    type="submit"
-	    disabled={disabled}>
+	<Button onClick={handleSubmit}
+		className="px-4 py-2 bg-blue-600 text-white rounded disabled:bg-gray-400">
 	  更新
 	</Button>
-      </form>)
-}
-
-export default PostEditForm
+      </div>)
+}) satisfies FC<Props>

frontend/src/components/PostEmbed.test.tsx

@@ -1,63 +0,0 @@
-import { fireEvent, render, screen, waitFor } from '@testing-library/react'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import PostEmbed from '@/components/PostEmbed'
-import { buildPost } from '@/test/factories'
-
-const dialogue = vi.hoisted (() => ({
-  confirm: vi.fn (),
-}))
-
-vi.mock ('@/components/dialogues/DialogueProvider', () => ({
-  useDialogue: () => dialogue,
-}))
-
-vi.mock ('@/components/NicoViewer', () => ({
-  default: ({ id }: { id: string }) => <div>Nico:{id}</div>,
-}))
-
-vi.mock ('react-youtube', () => ({
-  default: ({ videoId }: { videoId: string }) => <div>YouTube:{videoId}</div>,
-}))
-
-describe ('PostEmbed', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-  })
-
-  it ('embeds nicovideo watch URLs', () => {
-    render (<PostEmbed post={buildPost ({ url: 'https://www.nicovideo.jp/watch/sm12345' })}/>)
-
-    expect (screen.getByText ('Nico:sm12345')).toBeInTheDocument ()
-  })
-
-  it ('embeds x/twitter status URLs', () => {
-    render (<PostEmbed post={buildPost ({ url: 'https://x.com/someone/status/12345' })}/>)
-
-    expect (screen.getByRole ('link', { name: '@someone' })).toBeInTheDocument ()
-  })
-
-  it ('embeds youtube watch URLs', () => {
-    render (<PostEmbed post={buildPost ({ url: 'https://www.youtube.com/watch?v=abc123' })}/>)
-
-    expect (screen.getByText ('YouTube:abc123')).toBeInTheDocument ()
-  })
-
-  it ('asks before framing unknown external pages', async () => {
-    dialogue.confirm.mockResolvedValueOnce (true)
-    render (
-        <PostEmbed
-            post={buildPost ({ url: 'https://example.com/page', title: 'external' })}/>,
-    )
-
-    fireEvent.click (screen.getByRole ('link', { name: '外部ページを表示' }))
-
-    await waitFor (() => {
-      expect (dialogue.confirm).toHaveBeenCalled ()
-    })
-    expect (await screen.findByTitle ('external')).toHaveAttribute (
-        'src',
-        'https://example.com/page',
-    )
-  })
-})

frontend/src/components/PostEmbed.tsx

@@ -3,7 +3,6 @@ import YoutubeEmbed from 'react-youtube'
 
 import NicoViewer from '@/components/NicoViewer'
 import TwitterEmbed from '@/components/TwitterEmbed'
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 
 import type { FC, RefObject } from 'react'
 
@@ -16,10 +15,7 @@ type Props = {
     onMetadataChange?:  (meta: NiconicoMetadata) => void }
 
 
-const PostEmbed: FC<Props> = ({ ref, post, onLoadComplete, onMetadataChange }) => {
-  const dialogue = useDialogue ()
-  const [framed, setFramed] = useState (false)
-
+export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
   const url = new URL (post.url)
 
   switch (url.hostname.split ('.').slice (-2).join ('.'))
@@ -45,7 +41,7 @@ const PostEmbed: FC<Props> = ({ ref, post, onLoadComplete, onMetadataChange }) =
   case 'twitter.com':
   case 'x.com':
     {
-      const mUserId = url.pathname.match (/(?<=\/)[^/]+?(?=\/|$|\?)/)
+      const mUserId = url.pathname.match (/(?<=\/)[^\/]+?(?=\/|$|\?)/)
       const mStatusId = url.pathname.match (/(?<=\/status\/)\d+?(?=\/|$|\?)/)
       if (!(mUserId) || !(mStatusId))
 	break
@@ -73,6 +69,8 @@ const PostEmbed: FC<Props> = ({ ref, post, onLoadComplete, onMetadataChange }) =
     }
   }
 
+  const [framed, setFramed] = useState (false)
+
   return (
       <>
 	{framed
@@ -84,22 +82,15 @@ const PostEmbed: FC<Props> = ({ ref, post, onLoadComplete, onMetadataChange }) =
 		height={360}/>)
 	 : (
 	    <div>
-	      <a href="#" onClick={async e => {
+	      <a href="#" onClick={e => {
 		e.preventDefault ()
-
-		setFramed (await dialogue.confirm ({
-		    title: '未確認の外部ページを表示します。',
-		    description: (
-			<div>
-			  <p>悪意のあるスクリプトが実行される可能性があります。</p>
-			  <p>表示しますか?</p>
-			</div>),
-		    confirmText: '表示' }))
+		setFramed (confirm ('未確認の外部ページを表示します。\n'
+				    + '悪意のあるスクリプトが実行される可能性があります。\n'
+				    + '表示しますか?'))
+		return
 	      }}>
 		外部ページを表示
 	      </a>
 	    </div>)}
       </>)
-}
-
-export default PostEmbed
+}) satisfies FC<Props>

frontend/src/components/PostFormTagsArea.test.tsx

@@ -1,34 +0,0 @@
-import { fireEvent, screen, waitFor } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import PostFormTagsArea from '@/components/PostFormTagsArea'
-import { buildTag } from '@/test/factories'
-import { renderWithProviders } from '@/test/render'
-
-const api = vi.hoisted (() => ({
-  apiGet: vi.fn (),
-}))
-
-vi.mock ('@/lib/api', () => api)
-
-describe ('PostFormTagsArea', () => {
-  it ('updates text and fetches autocomplete for the selected token', async () => {
-    const setTags = vi.fn ()
-    api.apiGet.mockResolvedValueOnce ([buildTag ({ name: '虹夏', postCount: 3 })])
-
-    renderWithProviders (<PostFormTagsArea tags="虹" setTags={setTags}/>)
-
-    const textarea = screen.getByRole ('textbox')
-    fireEvent.focus (textarea)
-    fireEvent.select (textarea, { target: { selectionStart: 1, selectionEnd: 1 } })
-    fireEvent.change (textarea, { target: { value: '虹夏' } })
-
-    await waitFor (() => {
-      expect (api.apiGet).toHaveBeenCalledWith (
-          '/tags/autocomplete',
-          { params: { q: '虹', nico: '0' } },
-      )
-    })
-    expect (setTags).toHaveBeenCalledWith ('虹夏')
-  })
-})

frontend/src/components/PostFormTagsArea.tsx

@@ -7,7 +7,7 @@ import Label from '@/components/common/Label'
 import TextArea from '@/components/common/TextArea'
 import { apiGet } from '@/lib/api'
 
-import type { ComponentPropsWithoutRef, FC, SyntheticEvent } from 'react'
+import type { FC, SyntheticEvent } from 'react'
 
 import type { Tag } from '@/types'
 
@@ -31,12 +31,12 @@ const replaceToken = (value: string, start: number, end: number, text: string) =
     `${ value.slice (0, start) }${ text }${ value.slice (end) }`
 
 
-type Props = Omit<ComponentPropsWithoutRef<'textarea'>, 'value' | 'onChange' | 'onBlur'> & {
+type Props = {
     tags:     string
     setTags:  (tags: string) => void }
 
 
-const PostFormTagsArea: FC<Props> = ({ tags, setTags, ...rest }) => {
+export default (({ tags, setTags }: Props) => {
   const ref = useRef<HTMLTextAreaElement> (null)
 
   const [bounds, setBounds] = useState<{ start: number; end: number }> ({ start: 0, end: 0 })
@@ -76,7 +76,6 @@ const PostFormTagsArea: FC<Props> = ({ tags, setTags, ...rest }) => {
       <div className="relative w-full">
 	<Label>タグ</Label>
 	<TextArea
-	    {...rest}
 	    ref={ref}
 	    value={tags}
 	    onChange={ev => setTags (ev.target.value)}
@@ -97,6 +96,4 @@ const PostFormTagsArea: FC<Props> = ({ tags, setTags, ...rest }) => {
 		activeIndex={-1}
 		onSelect={handleTagSelect}/>)}
       </div>)
-}
-
-export default PostFormTagsArea
+}) satisfies FC<Props>

frontend/src/components/PostList.test.tsx

@@ -1,44 +0,0 @@
-import { fireEvent, screen } from '@testing-library/react'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import PostList from '@/components/PostList'
-import { buildPost } from '@/test/factories'
-import { renderWithProviders } from '@/test/render'
-
-const prefetchers = vi.hoisted (() => ({
-  prefetchForURL: vi.fn (),
-}))
-
-vi.mock ('@/lib/prefetchers', () => prefetchers)
-
-describe ('PostList', () => {
-  beforeEach (() => {
-    prefetchers.prefetchForURL.mockResolvedValue (undefined)
-  })
-
-  it ('renders post thumbnails as links to post details', () => {
-    renderWithProviders (
-        <PostList posts={[
-          buildPost ({ id: 1, title: 'First', thumbnail: 'first.jpg' }),
-          buildPost ({ id: 2, title: null, url: 'https://example.com/second' }),
-        ]}/>,
-    )
-
-    expect (screen.getByRole ('link', { name: 'First' })).toHaveAttribute (
-        'href',
-        '/posts/1',
-    )
-    expect (
-        screen.getByRole ('link', { name: 'https://example.com/second' }),
-    ).toHaveAttribute ('href', '/posts/2')
-  })
-
-  it ('calls the optional click handler', () => {
-    const onClick = vi.fn ()
-    renderWithProviders (<PostList posts={[buildPost ()]} onClick={onClick}/>)
-
-    fireEvent.click (screen.getByRole ('link', { name: 'テスト投稿' }))
-
-    expect (onClick).toHaveBeenCalledTimes (1)
-  })
-})

frontend/src/components/PostList.tsx

@@ -14,7 +14,7 @@ type Props = { posts:     Post[]
 	       onClick?:  (event: MouseEvent<HTMLElement>) => void }
 
 
-const PostList: FC<Props> = ({ posts, onClick }) => {
+export default (({ posts, onClick }: Props) => {
   const location = useLocation ()
 
   const setForLocationKey = useSharedTransitionStore (s => s.setForLocationKey)
@@ -42,7 +42,7 @@ const PostList: FC<Props> = ({ posts, onClick }) => {
 		    layoutId={layoutId}
 		    className={cn ('w-full h-full overflow-hidden rounded-xl shadow',
 				   'transform-gpu will-change-transform',
-				   (post.childPosts ?? []).length > 0 && 'ring-4 ring-green-500',
+				   (post.childPosts ?? []).length > 0 && 'outline-4 outline-green-500',
 				   (post.parentPosts ?? []).length > 0 && 'ring-4 ring-yellow-500')}
 		    whileHover={{ scale: 1.02 }}
 		    onLayoutAnimationStart={() => {
@@ -70,6 +70,4 @@ const PostList: FC<Props> = ({ posts, onClick }) => {
 	      </PrefetchLink>)
 	})}
       </div>)
-}
-
-export default PostList
+}) satisfies FC<Props>

frontend/src/components/PostOriginalCreatedTimeField.test.tsx

@@ -1,63 +0,0 @@
-import { fireEvent, render, screen } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import PostOriginalCreatedTimeField from '@/components/PostOriginalCreatedTimeField'
-
-describe ('PostOriginalCreatedTimeField', () => {
-  it ('updates from and before values', () => {
-    const setFrom = vi.fn ()
-    const setBefore = vi.fn ()
-
-    render (
-        <PostOriginalCreatedTimeField
-            originalCreatedFrom={null}
-            setOriginalCreatedFrom={setFrom}
-            originalCreatedBefore={null}
-            setOriginalCreatedBefore={setBefore}/>,
-    )
-
-    const inputs = screen.getAllByDisplayValue ('')
-    fireEvent.change (inputs[0], { target: { value: '2026-01-02T03:04' } })
-    fireEvent.change (inputs[1], { target: { value: '2026-01-03T03:04' } })
-
-    expect (setFrom).toHaveBeenCalledWith (expect.any (String))
-    expect (setBefore).toHaveBeenCalledWith (expect.any (String))
-  })
-
-  it ('infers an exclusive before value on blur', () => {
-    const setBefore = vi.fn ()
-
-    render (
-        <PostOriginalCreatedTimeField
-            originalCreatedFrom={null}
-            setOriginalCreatedFrom={vi.fn ()}
-            originalCreatedBefore={null}
-            setOriginalCreatedBefore={setBefore}/>,
-    )
-
-    const input = screen.getAllByDisplayValue ('')[0]
-    fireEvent.blur (input, { target: { value: '2026-01-02T03:04' } })
-
-    expect (setBefore).toHaveBeenCalledWith (expect.any (String))
-  })
-
-  it ('resets both values', () => {
-    const setFrom = vi.fn ()
-    const setBefore = vi.fn ()
-
-    render (
-        <PostOriginalCreatedTimeField
-            originalCreatedFrom="2026-01-01T00:00:00Z"
-            setOriginalCreatedFrom={setFrom}
-            originalCreatedBefore="2026-01-02T00:00:00Z"
-            setOriginalCreatedBefore={setBefore}/>,
-    )
-
-    const buttons = screen.getAllByRole ('button', { name: 'リセット' })
-    fireEvent.click (buttons[0])
-    fireEvent.click (buttons[1])
-
-    expect (setFrom).toHaveBeenCalledWith (null)
-    expect (setBefore).toHaveBeenCalledWith (null)
-  })
-})

frontend/src/components/PostOriginalCreatedTimeField.tsx

@@ -5,25 +5,22 @@ import { Button } from '@/components/ui/button'
 import type { FC } from 'react'
 
 type Props = {
-    disabled?:                boolean
     originalCreatedFrom:      string | null
     setOriginalCreatedFrom:   (x: string | null) => void
     originalCreatedBefore:    string | null
     setOriginalCreatedBefore: (x: string | null) => void }
 
 
-const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
-		   originalCreatedFrom,
+export default (({ originalCreatedFrom,
 		   setOriginalCreatedFrom,
 		   originalCreatedBefore,
-		   setOriginalCreatedBefore }) => (
+		   setOriginalCreatedBefore }: Props) => (
     <div>
       <Label>オリジナルの作成日時</Label>
       <div className="my-1 flex">
 	<div className="w-80">
 	  <DateTimeField
 	      className="mr-2"
-	      disabled={disabled ?? false}
 	      value={originalCreatedFrom ?? undefined}
 	      onChange={setOriginalCreatedFrom}
 	      onBlur={ev => {
@@ -43,7 +40,6 @@ const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
 	<div>
 	  <Button
 	      className="bg-gray-600 text-white rounded"
-	      disabled={disabled}
 	      onClick={() => {
 		setOriginalCreatedFrom (null)
 	      }}>
@@ -55,7 +51,6 @@ const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
 	<div className="w-80">
 	  <DateTimeField
 	      className="mr-2"
-	      disabled={disabled}
 	      value={originalCreatedBefore ?? undefined}
 	      onChange={setOriginalCreatedBefore}/>
 	  より前
@@ -63,7 +58,6 @@ const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
 	<div>
 	  <Button
 	      className="bg-gray-600 text-white rounded"
-	      disabled={disabled}
 	      onClick={() => {
 		setOriginalCreatedBefore (null)
 	      }}>
@@ -71,6 +65,4 @@ const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
 	  </Button>
 	</div>
       </div>
-    </div>)
-
-export default PostOriginalCreatedTimeField
+    </div>)) satisfies FC<Props>

frontend/src/components/RouteBlockerOverlay.test.tsx

@@ -1,30 +0,0 @@
-import { render, screen } from '@testing-library/react'
-import { afterEach, describe, expect, it } from 'vitest'
-
-import RouteBlockerOverlay, { useOverlayStore } from '@/components/RouteBlockerOverlay'
-
-describe ('RouteBlockerOverlay', () => {
-  afterEach (() => {
-    useOverlayStore.setState ({ active: false })
-    document.body.style.overflow = ''
-    document.body.removeAttribute ('aria-busy')
-  })
-
-  it ('renders nothing while inactive', () => {
-    useOverlayStore.setState ({ active: false })
-
-    const { container } = render (<RouteBlockerOverlay/>)
-
-    expect (container).toBeEmptyDOMElement ()
-  })
-
-  it ('renders a blocking progressbar and marks the body busy while active', () => {
-    useOverlayStore.setState ({ active: true })
-
-    render (<RouteBlockerOverlay/>)
-
-    expect (screen.getByRole ('progressbar', { name: 'Loading' })).toBeInTheDocument ()
-    expect (document.body).toHaveAttribute ('aria-busy', 'true')
-    expect (document.body.style.overflow).toBe ('hidden')
-  })
-})

frontend/src/components/RouteBlockerOverlay.tsx

@@ -13,7 +13,7 @@ export const useOverlayStore = create<OverlayStore> (set => ({
     setActive:  v => set ({ active: v }) }))
 
 
-const RouteBlockerOverlay: FC = () => {
+export default (() => {
   const active = useOverlayStore (s => s.active)
 
   useEffect (() => {
@@ -43,6 +43,4 @@ const RouteBlockerOverlay: FC = () => {
 	  </div>
 	</div>
       </div>)
-}
-
-export default RouteBlockerOverlay
+}) satisfies FC

frontend/src/components/SortHeader.test.tsx

@@ -1,39 +0,0 @@
-import { screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import SortHeader from '@/components/SortHeader'
-import { renderWithProviders } from '@/test/render'
-
-describe ('SortHeader', () => {
-  it ('toggles the active sort direction and resets the page', () => {
-    renderWithProviders (
-        <SortHeader
-            by="title"
-            label="タイトル"
-            currentOrder="title:asc"
-            defaultDirection={{ title: 'asc' }}/>,
-        { route: '/posts?tags=x&page=4&order=title%3Aasc' },
-    )
-
-    expect (screen.getByRole ('link', { name: 'タイトル ▲' })).toHaveAttribute (
-        'href',
-        '/posts?tags=x&page=1&order=title%3Adesc',
-    )
-  })
-
-  it ('uses default direction for inactive fields', () => {
-    renderWithProviders (
-        <SortHeader
-            by="updated_at"
-            label="更新"
-            currentOrder="title:desc"
-            defaultDirection={{ title: 'asc', updated_at: 'desc' }}/>,
-        { route: '/posts?page=2' },
-    )
-
-    expect (screen.getByRole ('link', { name: '更新' })).toHaveAttribute (
-        'href',
-        '/posts?page=1&order=updated_at%3Adesc',
-    )
-  })
-})

frontend/src/components/TagDetailSidebar.tsx

@@ -151,7 +151,7 @@ const DropSlot = ({ cat }: { cat: Category }) => {
 type Props = { post: Post; sp?: boolean }
 
 
-const TagDetailSidebar: FC<Props> = ({ post, sp }) => {
+export default (({ post, sp }: Props) => {
   sp = Boolean (sp)
 
   const qc = useQueryClient ()
@@ -376,6 +376,4 @@ const TagDetailSidebar: FC<Props> = ({ post, sp }) => {
 	  </DragOverlay>
 	</DndContext>
       </SidebarComponent>)
-}
-
-export default TagDetailSidebar
+}) satisfies FC<Props>

frontend/src/components/TagLink.test.tsx

@@ -1,45 +0,0 @@
-import { screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import TagLink from '@/components/TagLink'
-import { buildTag } from '@/test/factories'
-import { renderWithProviders } from '@/test/render'
-
-describe ('TagLink', () => {
-  it ('links tag names to post search and shows counts', () => {
-    renderWithProviders (
-        <TagLink tag={buildTag ({ name: '虹 夏', postCount: 4 })}/>,
-    )
-
-    expect (screen.getByRole ('link', { name: '虹 夏' })).toHaveAttribute (
-        'href',
-        '/posts?tags=%E8%99%B9+%E5%A4%8F',
-    )
-    expect (screen.getByText ('4')).toBeInTheDocument ()
-  })
-
-  it ('links wiki markers to the correct detail route', () => {
-    renderWithProviders (
-        <TagLink tag={buildTag ({ hasWiki: true, name: 'a/b' })}/>,
-    )
-
-    expect (screen.getByRole ('link', { name: '?' })).toHaveAttribute (
-        'href',
-        '/wiki/a%2Fb',
-    )
-  })
-
-  it ('renders aliases and non-link tags when requested', () => {
-    renderWithProviders (
-        <TagLink
-            tag={buildTag ({ matchedAlias: '別名', name: '正式名' })}
-            linkFlg={false}
-            withWiki={false}
-            withCount={false}/>,
-    )
-
-    expect (screen.getByText ('別名')).toBeInTheDocument ()
-    expect (screen.getByText ('正式名')).toBeInTheDocument ()
-    expect (screen.queryByRole ('link')).not.toBeInTheDocument ()
-  })
-})

frontend/src/components/TagLink.tsx

@@ -27,12 +27,12 @@ type Props =
     | PropsWithoutLink
 
 
-const TagLink: FC<Props> = ({ tag,
+export default (({ tag,
 		   nestLevel = 0,
 		   linkFlg   = true,
 		   withWiki  = true,
 		   withCount = true,
-		   ...props }) => {
+		   ...props }: Props) => {
   const spanClass = cn (
       `text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE }`,
       `dark:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE }`)
@@ -126,6 +126,4 @@ const TagLink: FC<Props> = ({ tag,
 	{withCount && (
 	    <span className="ml-1">{tag.postCount}</span>)}
       </>)
-}
-
-export default TagLink
+}) satisfies FC<Props>

frontend/src/components/TagSearch.tsx

@@ -12,7 +12,7 @@ import type { ChangeEvent, FC, KeyboardEvent } from 'react'
 import type { Tag } from '@/types'
 
 
-const TagSearch: FC = () => {
+export default (() => {
   const location = useLocation ()
   const navigate = useNavigate ()
 
@@ -115,6 +115,4 @@ const TagSearch: FC = () => {
 		      activeIndex={activeIndex}
 		      onSelect={handleTagSelect}/>
       </div>)
-}
-
-export default TagSearch
+}) satisfies FC

frontend/src/components/TagSearchBox.test.tsx

@@ -1,30 +0,0 @@
-import { fireEvent, screen } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import TagSearchBox from '@/components/TagSearchBox'
-import { buildTag } from '@/test/factories'
-import { renderWithProviders } from '@/test/render'
-
-describe ('TagSearchBox', () => {
-  it ('renders suggestions and selects tags on mouse down', () => {
-    const handleSelect = vi.fn ()
-    const tag = buildTag ({ id: 9, name: '候補', postCount: 2 })
-
-    renderWithProviders (
-        <TagSearchBox suggestions={[tag]} activeIndex={0} onSelect={handleSelect}/>,
-    )
-
-    fireEvent.mouseDown (screen.getByText ('候補'))
-
-    expect (handleSelect).toHaveBeenCalledWith (tag)
-    expect (screen.getByText ('2')).toBeInTheDocument ()
-  })
-
-  it ('renders nothing when suggestions are empty', () => {
-    const { container } = renderWithProviders (
-        <TagSearchBox suggestions={[]} activeIndex={-1} onSelect={vi.fn ()}/>,
-    )
-
-    expect (container).toBeEmptyDOMElement ()
-  })
-})

frontend/src/components/TagSearchBox.tsx

@@ -10,7 +10,7 @@ type Props = { suggestions: Tag[]
 	       onSelect:    (tag: Tag) => void }
 
 
-const TagSearchBox: FC<Props> = ({ suggestions, activeIndex, onSelect }) => {
+export default (({ suggestions, activeIndex, onSelect }: Props) => {
   if (suggestions.length === 0)
     return
 
@@ -26,6 +26,4 @@ const TagSearchBox: FC<Props> = ({ suggestions, activeIndex, onSelect }) => {
 	      <TagLink tag={tag} linkFlg={false} withWiki={false}/>
 	    </li>))}
       </ul>)
-}
-
-export default TagSearchBox
+}) satisfies FC<Props>

frontend/src/components/TagSidebar.tsx

@@ -19,7 +19,7 @@ type Props = { posts:     Post[]
 	       onClick?:  (event: MouseEvent<HTMLElement>) => void }
 
 
-const TagSidebar: FC<Props> = ({ posts, onClick }) => {
+export default (({ posts, onClick }: Props) => {
   const navigate = useNavigate ()
 
   const [tagsVsbl, setTagsVsbl] = useState (false)
@@ -126,6 +126,4 @@ const TagSidebar: FC<Props> = ({ posts, onClick }) => {
 	  {tagsVsbl ? '▲▲▲ タグ一覧を閉じる ▲▲▲' : '▼▼▼ タグ一覧を表示 ▼▼▼'}
 	</a>
       </SidebarComponent>)
-}
-
-export default TagSidebar
+}) satisfies FC<Props>

frontend/src/components/TopNav.tsx

@@ -26,7 +26,7 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
     pathName: string }): Menu => {
   const postCount = tag?.postCount ?? 0
 
-  const wikiPageFlg = Boolean (/^\/wiki\/(?!new|changes)[^/]+/.test (pathName) && wikiId)
+  const wikiPageFlg = Boolean (/^\/wiki\/(?!new|changes)[^\/]+/.test (pathName) && wikiId)
   const wikiTitle = pathName.split ('/')[2] ?? ''
 
   const tagFlg = /^\/tags\/\d+/.test (pathName)
@@ -36,12 +36,12 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 	  { name: '一覧', to: '/posts' },
 	  { name: '検索', to: '/posts/search' },
 	  { name: '追加', to: '/posts/new' },
-	  { name: '全体履歴', to: '/posts/changes' },
+	  { 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: 'ニコニコ連携', to: '/tags/nico' },
-	  { name: '全体履歴', to: '/tags/changes' },
+	  { name: '履歴', to: '/tags/changes' },
 	  { name: 'ヘルプ', to: '/wiki/ヘルプ:タグ' },
 	  { component: <Separator/>, visible: tagFlg },
 	  { name: `広場 (${ postCount || 0 })`,
@@ -53,7 +53,7 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 	  { name: '一覧', to: '/materials' },
 	  { name: '検索', to: '/materials/search', visible: false }, 
 	  { name: '追加', to: '/materials/new' },
-	  { name: '全体履歴', to: '/materials/changes', visible: false },
+	  { name: '履歴', to: '/materials/changes', visible: false },
 	  { 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' },
@@ -80,7 +80,7 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 }
 
 
-const TopNav: FC<Props> = ({ user }) => {
+export default (({ user }: Props) => {
   const location = useLocation ()
 
   const dirRef = useRef<(-1) | 1> (1)
@@ -159,12 +159,12 @@ const TopNav: FC<Props> = ({ user }) => {
   useEffect (() => {
     const unsubscribe = WikiIdBus.subscribe (setWikiId)
     return () => unsubscribe ()
-  }, [])
+  }, [activeIdx])
 
   useEffect (() => {
     setMenuOpen (false)
     setOpenItemIdx (activeIdx)
-  }, [activeIdx, location])
+  }, [location])
 
   return (
       <>
@@ -433,6 +433,4 @@ const TopNav: FC<Props> = ({ user }) => {
 	      </motion.div>)}
 	</AnimatePresence>
       </>)
-}
-
-export default TopNav
+}) satisfies FC<Props>

frontend/src/components/TopNavUser.test.tsx

@@ -1,29 +0,0 @@
-import { screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import TopNavUser from '@/components/TopNavUser'
-import { buildUser } from '@/test/factories'
-import { renderWithProviders } from '@/test/render'
-
-describe ('TopNavUser', () => {
-  it ('renders nothing without a user', () => {
-    const { container } = renderWithProviders (<TopNavUser user={null}/>)
-
-    expect (container).toBeEmptyDOMElement ()
-  })
-
-  it ('links named users to settings', () => {
-    renderWithProviders (<TopNavUser user={buildUser ({ name: '山田' })}/>)
-
-    expect (screen.getByRole ('link', { name: '山田' })).toHaveAttribute (
-        'href',
-        '/users/settings',
-    )
-  })
-
-  it ('uses the anonymous display name', () => {
-    renderWithProviders (<TopNavUser user={buildUser ({ name: null })}/>)
-
-    expect (screen.getByRole ('link', { name: '名もなきニジラー' })).toBeInTheDocument ()
-  })
-})

frontend/src/components/TopNavUser.tsx

@@ -10,7 +10,7 @@ type Props = { user:  User | null,
 	       sp?:   boolean }
 
 
-const TopNavUser: FC<Props> = ({ user, sp }) => {
+export default (({ user, sp }: Props) => {
   if (!(user))
     return
 
@@ -28,6 +28,4 @@ const TopNavUser: FC<Props> = ({ user, sp }) => {
 	  {user.name || '名もなきニジラー'}
 	</PrefetchLink>
       </>)
-}
-
-export default TopNavUser
+}) satisfies FC<Props>

frontend/src/components/TwitterEmbed.test.tsx

@@ -1,19 +0,0 @@
-import { render, screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import TwitterEmbed from '@/components/TwitterEmbed'
-
-describe ('TwitterEmbed', () => {
-  it ('renders tweet and user links', () => {
-    render (<TwitterEmbed userId="user_name" statusId="12345"/>)
-
-    expect (screen.getByRole ('link', { name: '@user_name' })).toHaveAttribute (
-        'href',
-        'https://twitter.com/user_name?ref_src=twsrc%3Etfw',
-    )
-    expect (screen.getByRole ('link', { name: /\d/ })).toHaveAttribute (
-        'href',
-        'https://twitter.com/user_name/status/12345?ref_src=twsrc%5Etfw',
-    )
-  })
-})

frontend/src/components/TwitterEmbed.tsx

@@ -5,7 +5,7 @@ type Props = {
     statusId: string }
 
 
-const TwitterEmbed: FC<Props> = ({ userId, statusId }) => {
+export default (({ userId, statusId }: Props) => {
   const now = (new Date).toLocaleDateString ()
 
   return (
@@ -18,6 +18,4 @@ const TwitterEmbed: FC<Props> = ({ userId, statusId }) => {
 	</blockquote>
 	<script async src="https://platform.twitter.com/widgets.js" charSet="utf-8"/>
       </div>)
-}
-
-export default TwitterEmbed
+}) satisfies FC<Props>

frontend/src/components/WikiBody.tsx

@@ -25,7 +25,7 @@ const mdComponents = { a: (({ href, children }) => (
 				  </a>))) } as const satisfies Components
 
 
-const WikiBody: FC<Props> = ({ title, body }) => {
+export default (({ title, body }: Props) => {
   const { data } = useQuery ({
       enabled: Boolean (body),
       queryKey: wikiKeys.index ({ }),
@@ -39,6 +39,4 @@ const WikiBody: FC<Props> = ({ title, body }) => {
       <ReactMarkdown components={mdComponents} remarkPlugins={remarkPlugins}>
 	{body || `このページは存在しません。[新規作成してください](/wiki/new?title=${ encodeURIComponent (title) })。`}
       </ReactMarkdown>)
-}
-
-export default WikiBody
+}) satisfies FC<Props>

frontend/src/components/common/DateTimeField.test.tsx

@@ -1,27 +0,0 @@
-import { fireEvent, render, screen } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import DateTimeField from '@/components/common/DateTimeField'
-
-describe ('DateTimeField', () => {
-  it ('renders an ISO value as a datetime-local value', () => {
-    render (<DateTimeField aria-label="日時" value="2026-01-02T03:04:05.000Z"/>)
-
-    const input = screen.getByLabelText ('日時')
-
-    expect (input).toHaveValue ('2026-01-02T12:04')
-  })
-
-  it ('reports local changes as ISO strings and empty values as null', () => {
-    const handleChange = vi.fn ()
-    render (<DateTimeField aria-label="日時" onChange={handleChange}/>)
-
-    const input = screen.getByLabelText ('日時')
-    fireEvent.change (input, { target: { value: '2026-01-02T03:04' } })
-    fireEvent.change (input, { target: { value: '' } })
-
-    const first = handleChange.mock.calls[0]?.[0]
-    expect (new Date (first).getFullYear ()).toBe (2026)
-    expect (handleChange).toHaveBeenLastCalledWith (null)
-  })
-})

frontend/src/components/common/DateTimeField.tsx

@@ -2,7 +2,7 @@ import { useEffect, useState } from 'react'
 
 import { cn } from '@/lib/utils'
 
-import type { ComponentPropsWithoutRef, FC, FocusEvent } from 'react'
+import type { FC, FocusEvent } from 'react'
 
 
 const pad = (n: number): string => n.toString ().padStart (2, '0')
@@ -18,14 +18,14 @@ const toDateTimeLocalValue = (d: Date) => {
 }
 
 
-type Props = Omit<ComponentPropsWithoutRef<'input'>, 'onChange'> & {
+type Props = {
     value?:     string
     onChange?:  (isoUTC: string | null) => void
     className?: string
     onBlur?:    (ev: FocusEvent<HTMLInputElement>) => void }
 
 
-const DateTimeField: FC<Props> = ({ value, onChange, className, onBlur, ...rest }) => {
+export default (({ value, onChange, className, onBlur }: Props) => {
   const [local, setLocal] = useState ('')
 
   useEffect (() => {
@@ -34,7 +34,6 @@ const DateTimeField: FC<Props> = ({ value, onChange, className, onBlur, ...rest
 
   return (
       <input
-	  {...rest}
 	  className={cn ('border rounded p-2', className)}
 	  type="datetime-local"
 	  value={local}
@@ -44,6 +43,4 @@ const DateTimeField: FC<Props> = ({ value, onChange, className, onBlur, ...rest
 	    onChange?.(v ? (new Date (v)).toISOString () : null)
 	  }}
 	  onBlur={onBlur}/>)
-}
-
-export default DateTimeField
+}) satisfies FC<Props>

frontend/src/components/common/Form.tsx

@@ -3,9 +3,7 @@ import type { FC, ReactNode } from 'react'
 type Props = { children: ReactNode }
 
 
-const Form: FC<Props> = ({ children }) => (
+export default (({ children }: Props) => (
     <div className="max-w-xl mx-auto p-4 space-y-4">
       {children}
-    </div>)
-
-export default Form
+    </div>)) satisfies FC<Props>

frontend/src/components/common/Label.test.tsx

@@ -1,26 +0,0 @@
-import { fireEvent, render, screen } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
-
-import Label from '@/components/common/Label'
-
-describe ('Label', () => {
-  it ('renders a plain label', () => {
-    render (<Label>名前</Label>)
-
-    expect (screen.getByText ('名前')).toBeInTheDocument ()
-  })
-
-  it ('renders and toggles the optional checkbox', () => {
-    const handleChange = vi.fn ()
-
-    render (
-        <Label checkBox={{ label: '不明', checked: false, onChange: handleChange }}>
-          日時
-        </Label>,
-    )
-
-    fireEvent.click (screen.getByRole ('checkbox', { name: '不明' }))
-
-    expect (handleChange).toHaveBeenCalledTimes (1)
-  })
-})

frontend/src/components/common/Label.tsx

@@ -1,14 +1,12 @@
 import React from 'react'
 
-import type { FC } from 'react'
-
 type Props = { children:  React.ReactNode
                checkBox?: { label:    string
                             checked:  boolean
                             onChange: (event: React.ChangeEvent<HTMLInputElement>) => void } }
 
 
-const Label: FC<Props> = ({ children, checkBox }) => {
+export default ({ children, checkBox }: Props) => {
   if (!(checkBox))
     {
       return (
@@ -28,5 +26,3 @@ const Label: FC<Props> = ({ children, checkBox }) => {
         </label>
       </div>)
 }
-
-export default Label

frontend/src/components/common/PageTitle.test.tsx

@@ -1,15 +0,0 @@
-import { render, screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import PageTitle from '@/components/common/PageTitle'
-
-
-describe ('PageTitle', () => {
-  it ('renders children as a level 1 heading', () => {
-    render (<PageTitle>Test title</PageTitle>)
-
-    const heading = screen.getByRole ('heading', { level: 1 })
-
-    expect (heading.textContent).toBe ('Test title')
-  })
-})

frontend/src/components/common/PageTitle.tsx

@@ -1,13 +1,9 @@
 import React from 'react'
 
-import type { FC } from 'react'
-
 type Props = { children: React.ReactNode }
 
 
-const PageTitle: FC<Props> = ({ children }) => (
+export default ({ children }: Props) => (
     <h1 className="text-2xl font-bold mb-2">
       {children}
     </h1>)
-
-export default PageTitle

frontend/src/components/common/Pagination.test.tsx

@@ -1,38 +0,0 @@
-import { screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import Pagination from '@/components/common/Pagination'
-import { renderWithProviders } from '@/test/render'
-
-describe ('Pagination', () => {
-  it ('builds page links while preserving existing query parameters', () => {
-    renderWithProviders (
-        <Pagination page={3} totalPages={5} siblingCount={1}/>,
-        { route: '/posts?tags=abc&page=3' },
-    )
-
-    expect (screen.getByLabelText ('前のページ')).toHaveAttribute (
-        'href',
-        '/posts?tags=abc&page=2',
-    )
-    expect (screen.getByLabelText ('次のページ')).toHaveAttribute (
-        'href',
-        '/posts?tags=abc&page=4',
-    )
-    expect (screen.getByText ('3')).toHaveAttribute ('aria-current', 'page')
-  })
-
-  it ('does not render active previous and next controls at the edges', () => {
-    const { rerender } = renderWithProviders (
-        <Pagination page={1} totalPages={1}/>,
-        { route: '/tags' },
-    )
-
-    expect (screen.queryByLabelText ('前のページ')).not.toBeInTheDocument ()
-    expect (screen.queryByLabelText ('次のページ')).not.toBeInTheDocument ()
-
-    rerender (<Pagination page={1} totalPages={2}/>)
-
-    expect (screen.getByLabelText ('次のページ')).toHaveAttribute ('href', '/tags?page=2')
-  })
-})

frontend/src/components/common/Pagination.tsx

@@ -48,7 +48,7 @@ const getPages = (
 }
 
 
-const Pagination: FC<Props> = ({ page, totalPages, siblingCount = 3 }) => {
+export default (({ page, totalPages, siblingCount = 3 }) => {
   const location = useLocation ()
 
   const buildTo = (p: number) => {
@@ -124,6 +124,4 @@ const Pagination: FC<Props> = ({ page, totalPages, siblingCount = 3 }) => {
 	      </>)}
 	</div>
       </nav>)
-}
-
-export default Pagination
+}) satisfies FC<Props>

frontend/src/components/common/SectionTitle.tsx

@@ -5,9 +5,7 @@ import type { ComponentPropsWithoutRef, FC } from 'react'
 type Props = ComponentPropsWithoutRef<'h2'>
 
 
-const SectionTitle: FC<Props> = ({ children, className, ...rest }) => (
+export default (({ children, className, ...rest }: Props) => (
     <h2 {...rest} className={cn ('text-xl my-4', className)}>
       {children}
-    </h2>)
-
-export default SectionTitle
+    </h2>)) satisfies FC<Props>

frontend/src/components/common/SubsectionTitle.tsx

@@ -1,13 +1,9 @@
 import React from 'react'
 
-import type { FC } from 'react'
-
 type Props = { children: React.ReactNode }
 
 
-const SubsectionTitle: FC<Props> = ({ children }) => (
+export default ({ children }: Props) => (
     <h3 className="my-2">
       {children}
     </h3>)
-
-export default SubsectionTitle

frontend/src/components/common/TabGroup.test.tsx

@@ -1,23 +0,0 @@
-import { fireEvent, render, screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import TabGroup, { Tab } from '@/components/common/TabGroup'
-
-describe ('TabGroup', () => {
-  it ('uses the init tab and switches tabs when clicked', () => {
-    render (
-        <TabGroup>
-          <Tab name="A">Alpha</Tab>
-          <Tab name="B" init>Beta</Tab>
-        </TabGroup>,
-    )
-
-    expect (screen.queryByText ('Alpha')).not.toBeInTheDocument ()
-    expect (screen.getByText ('Beta')).toBeInTheDocument ()
-
-    fireEvent.click (screen.getByText ('A'))
-
-    expect (screen.getByText ('Alpha')).toBeInTheDocument ()
-    expect (screen.queryByText ('Beta')).not.toBeInTheDocument ()
-  })
-})

frontend/src/components/common/TabGroup.tsx

@@ -1,5 +1,3 @@
-import type { FC } from 'react'
-
 import React, { useState } from 'react'
 import { cn } from '@/lib/utils'
 
@@ -12,7 +10,7 @@ type Props = { children: React.ReactNode }
 export const Tab = ({ children }: TabProps) => <>{children}</>
 
 
-const TabGroup: FC<Props> = ({ children }) => {
+export default ({ children }: Props) => {
   const tabs = React.Children.toArray (children) as React.ReactElement<TabProps>[]
 
   const [current, setCurrent] = useState<number> (() => {
@@ -39,5 +37,3 @@ const TabGroup: FC<Props> = ({ children }) => {
 	</div>
       </div>)
 }
-
-export default TabGroup

frontend/src/components/common/TagInput.test.tsx

@@ -1,44 +0,0 @@
-import { fireEvent, render, screen, waitFor } from '@testing-library/react'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import TagInput from '@/components/common/TagInput'
-import { buildTag } from '@/test/factories'
-
-const api = vi.hoisted (() => ({
-  apiGet: vi.fn (),
-}))
-
-vi.mock ('@/lib/api', () => api)
-
-describe ('TagInput', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-  })
-
-  it ('updates value and fetches autocomplete for the last token', async () => {
-    const setValue = vi.fn ()
-    api.apiGet.mockResolvedValueOnce ([buildTag ({ name: '虹夏', postCount: 2 })])
-
-    render (<TagInput value="ぼっち 虹" setValue={setValue}/>)
-
-    fireEvent.change (screen.getByRole ('textbox'), { target: { value: 'ぼっち 虹夏' } })
-
-    await waitFor (() => {
-      expect (api.apiGet).toHaveBeenCalledWith (
-          '/tags/autocomplete',
-          { params: { q: '虹夏' } },
-      )
-    })
-    expect (setValue).toHaveBeenCalledWith ('ぼっち 虹夏')
-  })
-
-  it ('does not fetch when the last token is blank', () => {
-    const setValue = vi.fn ()
-    render (<TagInput value="" setValue={setValue}/>)
-
-    fireEvent.change (screen.getByRole ('textbox'), { target: { value: ' ' } })
-
-    expect (api.apiGet).not.toHaveBeenCalled ()
-    expect (setValue).toHaveBeenCalledWith (' ')
-  })
-})

frontend/src/components/common/TagInput.tsx

@@ -12,7 +12,7 @@ type Props = {
     value:      string
     setValue:   (value: string) => void }
 
-const TagInput: FC<Props> = ({ value, setValue }) => {
+export default (({ value, setValue }: Props) => {
   const [activeIndex, setActiveIndex] = useState (-1)
   const [suggestions, setSuggestions] = useState<Tag[]> ([])
   const [suggestionsVsbl, setSuggestionsVsbl] = useState (false)
@@ -62,12 +62,9 @@ const TagInput: FC<Props> = ({ value, setValue }) => {
     case 'Enter':
       if (activeIndex < 0)
 	break
-      {
       ev.preventDefault ()
       const selected = suggestions[activeIndex]
-	if (selected)
-	  handleTagSelect (selected)
-      }
+      selected && handleTagSelect (selected)
       break
 
     case 'Escape':
@@ -97,6 +94,4 @@ const TagInput: FC<Props> = ({ value, setValue }) => {
 	    activeIndex={activeIndex}
 	    onSelect={handleTagSelect}/>
       </div>)
-}
-
-export default TagInput
+}) satisfies FC<Props>

frontend/src/components/common/TypographyAndForm.test.tsx

@@ -1,37 +0,0 @@
-import { createRef } from 'react'
-import { render, screen } from '@testing-library/react'
-import { describe, expect, it } from 'vitest'
-
-import Form from '@/components/common/Form'
-import SectionTitle from '@/components/common/SectionTitle'
-import SubsectionTitle from '@/components/common/SubsectionTitle'
-import TextArea from '@/components/common/TextArea'
-
-describe ('common typography and form components', () => {
-  it ('renders Form children inside the standard container', () => {
-    render (<Form><span>Content</span></Form>)
-
-    expect (screen.getByText ('Content')).toBeInTheDocument ()
-  })
-
-  it ('renders SectionTitle as an h2', () => {
-    render (<SectionTitle>Section</SectionTitle>)
-
-    expect (screen.getByRole ('heading', { level: 2, name: 'Section' })).toBeInTheDocument ()
-  })
-
-  it ('renders SubsectionTitle as an h3', () => {
-    render (<SubsectionTitle>Subsection</SubsectionTitle>)
-
-    expect (screen.getByRole ('heading', { level: 3, name: 'Subsection' })).toBeInTheDocument ()
-  })
-
-  it ('forwards refs and props to TextArea', () => {
-    const ref = createRef<HTMLTextAreaElement> ()
-
-    render (<TextArea ref={ref} aria-label="Body" defaultValue="text"/>)
-
-    expect (ref.current).toBe (screen.getByLabelText ('Body'))
-    expect (screen.getByLabelText ('Body')).toHaveValue ('text')
-  })
-})

frontend/src/components/dialogues/DialogueProvider.tsx

@@ -1,189 +0,0 @@
-import { createContext, useCallback, useContext, useMemo, useState } from 'react'
-
-import { Button } from '@/components/ui/button'
-import { Dialog,
-	 DialogContent,
-	 DialogDescription,
-	 DialogFooter,
-	 DialogHeader,
-	 DialogTitle } from '@/components/ui/dialog'
-
-import type { FC, ReactNode } from 'react'
-
-type DialogueVariant = 'default' | 'danger'
-
-type ConfirmOptions = { title:        string
-			description?: ReactNode
-			confirmText?: string
-			cancelText?:  string
-			variant?:     DialogueVariant }
-
-type AlertOptions = { title:        string
-		      description?: ReactNode
-		      okText?:      string }
-
-type Choice<T extends string> = { value:    T
-				  label:    string
-				  variant?: DialogueVariant }
-
-type ChoiceOptions<T extends string> = { title:         string
-					 description?:  ReactNode
-					 choices:       Choice<T>[]
-					 cancelText?:   string }
-
-type DialogueRequest =
-    | { id:       number
-	kind:     'confirm'
-	options:  ConfirmOptions
-	resolve:  (value: boolean) => void }
-    | { id:       number
-	kind:     'alert'
-	options:  AlertOptions
-	resolve:  () => void }
-    | { id:       number
-	kind:     'choice'
-	options:  ChoiceOptions<string>
-	resolve:  (value: string | null) => void }
-
-type DialogueAPI =
-    { confirm:  (options: ConfirmOptions) => Promise<boolean>
-      alert:    (options: AlertOptions) => Promise<void>
-      choice:   <T extends string> (options: ChoiceOptions<T>) => Promise<T | null> }
-
-const DialogueContext = createContext<DialogueAPI | null> (null)
-
-let nextDialogueId = 1
-
-type Props = { children: ReactNode }
-
-
-const DialogueProvider: FC<Props> = ({ children }) => {
-  const [queue, setQueue] = useState<DialogueRequest[]> ([])
-
-  const push = useCallback ((request: Omit<DialogueRequest, 'id'>) => {
-    const id = nextDialogueId
-    ++nextDialogueId
-
-    setQueue (q => [...q, { ...request, id } as DialogueRequest])
-  }, [])
-
-  const closeActive = useCallback ((result?: unknown) => {
-    setQueue (q => {
-      const [active, ...rest] = q
-
-      if (!(active))
-	return rest
-
-      switch (active.kind)
-      {
-      case 'confirm':
-	active.resolve (Boolean (result))
-	break
-
-      case 'alert':
-	active.resolve ()
-	break
-
-      case 'choice':
-	active.resolve ((result ?? null) as string | null)
-	break
-      }
-
-      return rest
-    })
-  }, [])
-
-  const api = useMemo<DialogueAPI> (() => ({
-      confirm: options => new Promise<boolean> (resolve => {
-	push ({ kind: 'confirm', options, resolve })
-      }),
-      alert: options => new Promise<void> (resolve => {
-	push ({ kind: 'alert', options, resolve })
-      }),
-      choice: options => new Promise (resolve => {
-	push ({ kind: 'choice',
-		options: options as ChoiceOptions<string>,
-		resolve: resolve as (value: string | null) => void })
-      }) }), [push])
-
-  const active = queue[0]
-
-  return (
-      <DialogueContext.Provider value={api}>
-	{children}
-
-	<Dialog
-	    open={Boolean (active)}
-	    onOpenChange={open => {
-	      if (!(open))
-		closeActive (active?.kind !== 'confirm' && null)
-	    }}>
-	  {active && (
-	      <DialogContent className="px-6 pb-6 pt-7">
-		<DialogHeader className="pl-8">
-		  <DialogTitle>{active.options.title}</DialogTitle>
-
-		  {active.options.description && (
-		      <DialogDescription asChild>
-			<div>{active.options.description}</div>
-		      </DialogDescription>)}
-		</DialogHeader>
-
-		<DialogFooter>
-		  {active.kind === 'confirm' && (
-		      <>
-			<Button
-			    variant="outline"
-			    onClick={() => closeActive (false)}>
-			  {active.options.cancelText ?? '取消'}
-			</Button>
-
-			<Button
-			    variant={(active.options.variant === 'danger')
-				     ? 'destructive'
-				     : 'default'}
-			    onClick={() => closeActive (true)}>
-			  {active.options.confirmText ?? '確定'}
-			</Button>
-		      </>)}
-
-		  {active.kind === 'alert' && (
-		      <Button onClick={() => closeActive ()}>
-			{active.options.okText ?? '確定'}
-		      </Button>)}
-
-		  {active.kind === 'choice' && (
-		      <>
-			<Button
-			    variant="outline"
-			    onClick={() => closeActive (null)}>
-			  {active.options.cancelText ?? '取消'}
-			</Button>
-
-			{active.options.choices.map (choice => (
-			    <Button
-				key={choice.value}
-				variant={(choice.variant === 'danger')
-					 ? 'destructive'
-					 : 'default'}
-				onClick={() => closeActive (choice.value)}>
-			      {choice.label}
-			    </Button>))}
-		      </>)}
-		</DialogFooter>
-	      </DialogContent>)}
-	</Dialog>
-      </DialogueContext.Provider>)
-}
-
-
-export const useDialogue = () => {
-  const dialogue = useContext (DialogueContext)
-
-  if (!(dialogue))
-    throw new Error ('useDialogue must be used inside DialogueProvider')
-
-  return dialogue
-}
-
-export default DialogueProvider

frontend/src/components/layout/MainArea.tsx

@@ -9,12 +9,10 @@ type Props = {
     className?: string }
 
 
-const MainArea: FC<Props> = ({ children, className }) => (
+export default (({ children, className }: Props) => (
     <motion.main
 	transition={{ layout: { duration: .2, ease: 'easeOut' } }}
 	className={cn ('flex-1 overflow-y-auto p-4', className)}
 	layout="position">
       {children}
-    </motion.main>)
-
-export default MainArea
+    </motion.main>)) satisfies FC<Props>

frontend/src/components/layout/SidebarComponent.tsx

@@ -6,7 +6,7 @@ import type { FC, ReactNode } from 'react'
 type Props = { children: ReactNode }
 
 
-const SidebarComponent: FC<Props> = ({ children }) => (
+export default (({ children }: Props) => (
     <motion.div
 	layout="position"
 	transition={{ layout: { duration: .2, ease: 'easeOut' } }}
@@ -27,6 +27,4 @@ const SidebarComponent: FC<Props> = ({ children }) => (
       </Helmet>
 
       {children}
-    </motion.div>)
-
-export default SidebarComponent
+    </motion.div>)) satisfies FC<Props>

frontend/src/components/ui/button.tsx

@@ -4,47 +4,34 @@ import { cva, type VariantProps } from "class-variance-authority"
 
 import { cn } from "@/lib/utils"
 
-const buttonVariants = cva (
-  [
-    'inline-flex items-center justify-center gap-2 whitespace-nowrap',
-    'rounded-md text-sm font-medium transition-colors',
-    'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-slate-400',
-    'disabled:pointer-events-none disabled:opacity-50',
-    '[&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0',
-  ].join (' '),
+const buttonVariants = cva(
+  "inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium ring-offset-background transition-colors focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 disabled:pointer-events-none disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:size-4 [&_svg]:shrink-0",
   {
     variants: {
       variant: {
-        default:
-          'bg-slate-900 text-white hover:bg-slate-700 dark:bg-slate-100 dark:text-slate-900 dark:hover:bg-slate-300',
-
+        default: "bg-primary text-primary-foreground hover:bg-primary/90",
         destructive:
-          'bg-red-600 text-white hover:bg-red-700 dark:bg-red-700 dark:hover:bg-red-600',
-
+          "bg-destructive text-destructive-foreground hover:bg-destructive/90",
         outline:
-          'border border-slate-300 bg-white text-slate-900 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-100 dark:hover:bg-slate-800',
-
+          "border border-input bg-background hover:bg-accent hover:text-accent-foreground",
         secondary:
-          'bg-slate-100 text-slate-900 hover:bg-slate-200 dark:bg-slate-800 dark:text-slate-100 dark:hover:bg-slate-700',
-
-        ghost:
-          'text-slate-900 hover:bg-slate-100 dark:text-slate-100 dark:hover:bg-slate-800',
-
-        link:
-          'text-blue-700 underline-offset-4 hover:underline dark:text-blue-300',
+          "bg-secondary text-secondary-foreground hover:bg-secondary/80",
+        ghost: "hover:bg-accent hover:text-accent-foreground",
+        link: "text-primary underline-offset-4 hover:underline",
       },
       size: {
-        default: 'h-10 px-4 py-2',
-        sm:      'h-9 rounded-md px-3',
-        lg:      'h-11 rounded-md px-8',
-        icon:    'h-10 w-10',
+        default: "h-10 px-4 py-2",
+        sm: "h-9 rounded-md px-3",
+        lg: "h-11 rounded-md px-8",
+        icon: "h-10 w-10",
       },
     },
     defaultVariants: {
-      variant: 'default',
-      size:    'default',
+      variant: "default",
+      size: "default",
     },
-  })
+  }
+)
 
 export interface ButtonProps
   extends React.ButtonHTMLAttributes<HTMLButtonElement>,

frontend/src/components/ui/dialog.tsx

@@ -37,29 +37,25 @@ const DialogContent = React.forwardRef<
     <DialogOverlay />
     <DialogPrimitive.Content
       ref={ref}
-      className={cn (
-	  'fixed left-[50%] top-[50%] z-50 grid w-[calc(100%-2rem)] max-w-lg',
+      className={cn(
+	  'fixed left-[50%] top-[50%] z-50 w-[90%] grid max-w-lg',
 	  'translate-x-[-50%] translate-y-[-50%]',
-	  'gap-5 rounded-2xl border border-border',
-	  'bg-background p-6 text-foreground shadow-2xl',
-	  'duration-200',
+	  'gap-4 border bg-gray-300/80 dark:bg-gray-700/80',
+	  'p-6 shadow-lg duration-200',
 	  'data-[state=open]:animate-in data-[state=closed]:animate-out',
 	  'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0',
 	  'data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95',
+	  'data-[state=closed]:slide-out-to-left-1/2',
+	  'data-[state=closed]:slide-out-to-top-[48%]',
+	  'data-[state=open]:slide-in-from-left-1/2',
+	  'data-[state=open]:slide-in-from-top-[48%] rounded-lg',
 	  className)}
       {...props}
     >
       {children}
-
-      <DialogPrimitive.Close
-	  className={cn (
-	      'absolute left-4 top-4 rounded-full p-1',
-	      'text-slate-500 transition-colors',
-	      'hover:bg-slate-200 hover:text-slate-900',
-	      'dark:text-slate-400 dark:hover:bg-slate-700 dark:hover:text-slate-50',
-	      'focus:outline-none focus:ring-2 focus:ring-slate-400')}>
-	<X className="h-4 w-4"/>
-	<span className="sr-only">閉ぢる</span>
+      <DialogPrimitive.Close className="absolute right-4 top-4 bg-red-500 rounded-sm opacity-70 ring-offset-background transition-opacity hover:opacity-100 focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2 disabled:pointer-events-none data-[state=open]:bg-accent data-[state=open]:text-muted-foreground">
+        <X className="h-3 w-3" />
+        <span className="sr-only">Close</span>
       </DialogPrimitive.Close>
     </DialogPrimitive.Content>
   </DialogPortal>

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

@@ -18,6 +18,13 @@ type ToasterToast = ToastProps & {
   action?: ToastActionElement
 }
 
+const actionTypes = {
+  ADD_TOAST: "ADD_TOAST",
+  UPDATE_TOAST: "UPDATE_TOAST",
+  DISMISS_TOAST: "DISMISS_TOAST",
+  REMOVE_TOAST: "REMOVE_TOAST",
+} as const
+
 let count = 0
 
 function genId() {
@@ -25,21 +32,23 @@ function genId() {
   return count.toString()
 }
 
+type ActionType = typeof actionTypes
+
 type Action =
   | {
-      type: "ADD_TOAST"
+      type: ActionType["ADD_TOAST"]
       toast: ToasterToast
     }
   | {
-      type: "UPDATE_TOAST"
+      type: ActionType["UPDATE_TOAST"]
       toast: Partial<ToasterToast>
     }
   | {
-      type: "DISMISS_TOAST"
+      type: ActionType["DISMISS_TOAST"]
       toastId?: ToasterToast["id"]
     }
   | {
-      type: "REMOVE_TOAST"
+      type: ActionType["REMOVE_TOAST"]
       toastId?: ToasterToast["id"]
     }
 

frontend/src/components/users/InheritDialogue.tsx

@@ -1,13 +1,8 @@
-import type { FC } from 'react'
-
 import { useState } from 'react'
 
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { Dialog,
          DialogContent,
-	 DialogDescription,
-	 DialogHeader,
          DialogTitle } from '@/components/ui/dialog'
 import { Input } from '@/components/ui/input'
 import { toast } from '@/components/ui/use-toast'
@@ -20,17 +15,11 @@ type Props = { visible:         boolean
 	       setUser:         (user: User) => void }
 
 
-const InheritDialogue: FC<Props> = ({ visible, onVisibleChange, setUser }) => {
-  const dialogue = useDialogue ()
-
+export default ({ visible, onVisibleChange, setUser }: Props) => {
   const [inputCode, setInputCode] = useState ('')
 
   const handleTransfer = async () => {
-    if (!(await dialogue.confirm ({
-	title: '引継ぎを行ってもよろしいですか?',
-	description: '現在のアカウントからはログアウトされます．',
-	confirmText: '引継ぐ',
-	variant: 'danger' })))
+    if (!(confirm ('引継ぎを行ってもよろしいですか?\n現在のアカウントからはログアウトされます．')))
       return
 
     try
@@ -55,20 +44,14 @@ const InheritDialogue: FC<Props> = ({ visible, onVisibleChange, setUser }) => {
 
   return (
       <Dialog open={visible} onOpenChange={onVisibleChange}>
-	<DialogContent className="px-6 pp-6 pt-7">
-	  <DialogHeader className="pl-8">
+	<DialogContent>
 	  <DialogTitle>ほかのブラウザから引継ぐ</DialogTitle>
-	    <DialogDescription asChild>
 	  <div className="flex gap-2">
 	    <Input placeholder="引継ぎコードを入力"
 		   value={inputCode}
 		   onChange={ev => setInputCode (ev.target.value)}/>
 	    <Button onClick={handleTransfer}>引継ぐ</Button>
 	  </div>
-	    </DialogDescription>
-	  </DialogHeader>
 	</DialogContent>
       </Dialog>)
 }
-
-export default InheritDialogue

frontend/src/components/users/UserCodeDialogue.tsx

@@ -1,12 +1,6 @@
-import type { FC } from 'react'
-
-import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { Dialog,
 	 DialogContent,
-	 DialogDescription,
-	 DialogFooter,
-	 DialogHeader,
 	 DialogTitle } from '@/components/ui/dialog'
 import { toast } from '@/components/ui/use-toast'
 import { apiPost } from '@/lib/api'
@@ -19,21 +13,12 @@ type Props = { visible:         boolean
 	       setUser:         React.Dispatch<React.SetStateAction<User | null>> }
 
 
-const UserCodeDialogue: FC<Props> = ({ visible, onVisibleChange, user, setUser }) => {
-  const dialogue = useDialogue ()
-
+export default ({ visible, onVisibleChange, user, setUser }: Props) => {
   const handleChange = async () => {
     if (!(user))
       return
 
-    if (!(await dialogue.confirm ({
-	title: '引継ぎコードを再発行しますか?',
-	description: (
-	    <div>
-	      <p>再発行するとほかのブラウザからはログアウトされます．</p>
-	    </div>),
-	confirmText: '再発行',
-	variant: 'danger' })))
+    if (!(confirm ('引継ぎコードを再発行しますか?\n再発行するとほかのブラウザからはログアウトされます．')))
       return
 
     const data = await apiPost<{ code: string }> ('/users/code/renew', { },
@@ -48,28 +33,21 @@ const UserCodeDialogue: FC<Props> = ({ visible, onVisibleChange, user, setUser }
 
   return (
       <Dialog open={visible} onOpenChange={onVisibleChange}>
-	<DialogContent className="px-6 pb-6 pt-7">
-	  <DialogHeader className="pl-8">
+	<DialogContent>
 	  <DialogTitle>引継ぎコード</DialogTitle>
-
-	    <DialogDescription asChild>
 	  <div>
 	    <p>あなたの引継ぎコードはこちらです：</p>
 	    <div className="m-2">{user?.inheritanceCode}</div>
-		<p className="mt-1 text-sm text-destructive">
+	    <p className="mt-1 text-sm text-red-500">
 	      このコードはほかの人には教えないでください!
 	    </p>
-	      </div>
-	    </DialogDescription>
-	  </DialogHeader>
-
-	  <DialogFooter>
-	    <Button onClick={handleChange} variant="destructive">
+	    <div className="my-4">
+	      <Button onClick={handleChange}
+		      className="px-4 py-2 bg-red-600 text-white rounded disabled:bg-gray-400">
 		引継ぎコード再発行
 	      </Button>
-	  </DialogFooter>
+	    </div>
+	  </div>
 	</DialogContent>
       </Dialog>)
 }
-
-export default UserCodeDialogue

frontend/src/index.css

@@ -6,56 +6,6 @@
 
 @layer base
 {
-  :root
-  {
-    --background: 0 0% 100%;
-    --foreground: 222.2 84% 4.9%;
-
-    --primary: 222.2 47.4% 11.2%;
-    --primary-foreground: 210 40% 98%;
-
-    --secondary: 210 40% 96.1%;
-    --secondary-foreground: 222.2 47.4% 11.2%;
-
-    --destructive: 0 72.2% 50.6%;
-    --destructive-foreground: 210 40% 98%;
-
-    --muted: 210 40% 96.1%;
-    --muted-foreground: 215.4 16.3% 46.9%;
-
-    --accent: 210 40% 96.1%;
-    --accent-foreground: 222.2 47.4% 11.2%;
-
-    --border: 214.3 31.8% 91.4%;
-    --input: 214.3 31.8% 91.4%;
-    --ring: 222.2 84% 4.9%;
-  }
-
-  .dark
-  {
-    --background: 222.2 84% 4.9%;
-    --foreground: 210 40% 98%;
-
-    --primary: 210 40% 98%;
-    --primary-foreground: 222.2 47.4% 11.2%;
-
-    --secondary: 217.2 32.6% 17.5%;
-    --secondary-foreground: 210 40% 98%;
-
-    --destructive: 0 62.8% 45%;
-    --destructive-foreground: 210 40% 98%;
-
-    --muted: 217.2 32.6% 17.5%;
-    --muted-foreground: 215 20.2% 65.1%;
-
-    --accent: 217.2 32.6% 17.5%;
-    --accent-foreground: 210 40% 98%;
-
-    --border: 217.2 32.6% 17.5%;
-    --input: 217.2 32.6% 17.5%;
-    --ring: 212.7 26.8% 83.9%;
-  }
-
   body
   {
     @apply overflow-x-clip;
@@ -104,6 +54,34 @@ body
   min-height: 100dvh;
 }
 
+h1
+{
+  font-size: 3.2em;
+  line-height: 1.1;
+}
+
+button
+{
+  border-radius: 8px;
+  border: 1px solid transparent;
+  padding: 0.6em 1.2em;
+  font-size: 1em;
+  font-weight: 500;
+  font-family: inherit;
+  background-color: #1a1a1a;
+  cursor: pointer;
+  transition: border-color 0.25s;
+}
+button:hover
+{
+  border-color: #646cff;
+}
+button:focus,
+button:focus-visible
+{
+  outline: 4px auto -webkit-focus-ring-color;
+}
+
 @media (prefers-color-scheme: light)
 {
   :root

frontend/src/lib/api.test.ts

@@ -1,96 +0,0 @@
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-const mocks = vi.hoisted (() => {
-  const client = {
-    delete: vi.fn (),
-    get:    vi.fn (),
-    patch:  vi.fn (),
-    post:   vi.fn (),
-    put:    vi.fn (),
-  }
-
-  return {
-    client,
-    isAxiosError: vi.fn (),
-  }
-})
-
-vi.mock ('axios', () => ({
-  default: {
-    create:       vi.fn (() => mocks.client),
-    isAxiosError: mocks.isAxiosError,
-  },
-}))
-
-vi.mock ('@/config', () => ({
-  API_BASE_URL: '/api',
-}))
-
-describe ('api helpers', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-    localStorage.clear ()
-  })
-
-  it ('adds the transfer code header and camelizes get responses', async () => {
-    localStorage.setItem ('user_code', 'abc123')
-    mocks.client.get.mockResolvedValueOnce ({
-      data: { post_id: 1, nested_value: { created_at: 'now' } },
-    })
-
-    const { apiGet } = await import ('@/lib/api')
-    const data = await apiGet<{ postId: number; nestedValue: { createdAt: string } }> (
-        '/posts/1',
-        { headers: { 'X-Extra': '1' }, params: { page: 2 } },
-    )
-
-    expect (mocks.client.get).toHaveBeenCalledWith (
-        '/posts/1',
-        {
-          headers: { 'X-Transfer-Code': 'abc123', 'X-Extra': '1' },
-          params:  { page: 2 },
-        },
-    )
-    expect (data).toEqual ({ postId: 1, nestedValue: { createdAt: 'now' } })
-  })
-
-  it ('passes an empty body for post-like requests when body is omitted', async () => {
-    mocks.client.patch.mockResolvedValueOnce ({ data: { ok_value: true } })
-
-    const { apiPatch } = await import ('@/lib/api')
-    const data = await apiPatch<{ okValue: boolean }> ('/posts/1')
-
-    expect (mocks.client.patch).toHaveBeenCalledWith (
-        '/posts/1',
-        {},
-        { headers: { 'X-Transfer-Code': '' } },
-    )
-    expect (data.okValue).toBe (true)
-  })
-
-  it ('does not camelize blob responses', async () => {
-    const blob = new Blob (['csv'])
-    mocks.client.get.mockResolvedValueOnce ({ data: blob })
-
-    const { apiGet } = await import ('@/lib/api')
-    const data = await apiGet<Blob> ('/exports', { responseType: 'blob' })
-
-    expect (data).toBe (blob)
-  })
-
-  it ('delegates deletes and exposes axios error detection', async () => {
-    const err = new Error ('bad')
-    mocks.client.delete.mockResolvedValueOnce ({})
-    mocks.isAxiosError.mockReturnValueOnce (true)
-
-    const { apiDelete, isApiError } = await import ('@/lib/api')
-    await apiDelete ('/posts/1')
-
-    expect (mocks.client.delete).toHaveBeenCalledWith (
-        '/posts/1',
-        { headers: { 'X-Transfer-Code': '' } },
-    )
-    expect (isApiError (err)).toBe (true)
-    expect (mocks.isAxiosError).toHaveBeenCalledWith (err)
-  })
-})

frontend/src/lib/api.ts

@@ -28,7 +28,7 @@ const apiP = async <T> (
   const res = await client[method] (path, body ?? { }, withUserCode (opt))
   if (opt?.responseType === 'blob')
     return res.data as T
-  return toCamel (res.data as Record<string, unknown>, { deep: true }) as T
+  return toCamel (res.data as any, { deep: true }) as T
 }
 
 
@@ -39,7 +39,7 @@ export const apiGet = async <T> (
   const res = await client.get (path, withUserCode (opt))
   if (opt?.responseType === 'blob')
     return res.data as T
-  return toCamel (res.data as Record<string, unknown>, { deep: true }) as T
+  return toCamel (res.data as any, { deep: true }) as T
 }
 
 
@@ -72,5 +72,4 @@ export const apiDelete = async (
 }
 
 
-export const isApiError = <T = unknown> (err: unknown): err is AxiosError<T> =>
-    axios.isAxiosError (err)
+export const isApiError = (err: unknown): err is AxiosError => axios.isAxiosError (err)

frontend/src/lib/posts.test.ts

@@ -1,117 +0,0 @@
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import { fetchPostChanges, fetchPosts, toggleViewedFlg, updatePost } from '@/lib/posts'
-
-import type { FetchPostsParams } from '@/types'
-
-const api = vi.hoisted (() => ({
-  apiDelete: vi.fn (),
-  apiGet:    vi.fn (),
-  apiPost:   vi.fn (),
-  apiPut:    vi.fn (),
-}))
-
-vi.mock ('@/lib/api', () => api)
-
-const baseParams: FetchPostsParams = {
-  url:                 '',
-  title:               '',
-  tags:                '',
-  match:               'all',
-  originalCreatedFrom: '',
-  originalCreatedTo:   '',
-  createdFrom:         '',
-  createdTo:           '',
-  updatedFrom:         '',
-  updatedTo:           '',
-  page:                1,
-  limit:               20,
-  order:               'updated_at:desc',
-}
-
-describe ('posts API functions', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-  })
-
-  it ('maps post search parameters to backend snake_case names', async () => {
-    api.apiGet.mockResolvedValueOnce ({ posts: [], count: 0 })
-
-    await fetchPosts ({
-      ...baseParams,
-      title:               'title',
-      tags:                'a b',
-      originalCreatedFrom: '2026-01-01',
-      updatedTo:           '2026-02-01',
-    })
-
-    expect (api.apiGet).toHaveBeenCalledWith (
-        '/posts',
-        {
-          params: {
-            title:                 'title',
-            tags:                  'a b',
-            match:                 'all',
-            original_created_from: '2026-01-01',
-            updated_to:            '2026-02-01',
-            page:                  1,
-            limit:                 20,
-            order:                 'updated_at:desc',
-          },
-        },
-    )
-  })
-
-  it ('updates posts with version and merge controls', async () => {
-    api.apiPut.mockResolvedValueOnce ({ id: 5 })
-
-    await updatePost (
-        {
-          id:                    5,
-          title:                 'new title',
-          tags:                  'tag',
-          parentPostIds:         '1 2',
-          originalCreatedFrom:   null,
-          originalCreatedBefore: '2026-01-02T00:00:00Z',
-        },
-        { baseVersionNo: 7, force: true, merge: false },
-    )
-
-    expect (api.apiPut).toHaveBeenCalledWith (
-        '/posts/5',
-        {
-          title:                   'new title',
-          tags:                    'tag',
-          parent_post_ids:         '1 2',
-          original_created_from:   null,
-          original_created_before: '2026-01-02T00:00:00Z',
-        },
-        {
-          params: {
-            base_version_no: '7',
-            force:           '1',
-            merge:           '0',
-          },
-        },
-    )
-  })
-
-  it ('uses the viewed endpoint method matching the requested state', async () => {
-    await toggleViewedFlg ('9', true)
-    await toggleViewedFlg ('9', false)
-
-    expect (api.apiPost).toHaveBeenCalledWith ('/posts/9/viewed')
-    expect (api.apiDelete).toHaveBeenCalledWith ('/posts/9/viewed')
-  })
-
-  it ('keeps optional post history filters out when blank', async () => {
-    api.apiGet.mockResolvedValueOnce ({ versions: [], count: 0 })
-
-    await fetchPostChanges ({ page: 2, limit: 50 })
-
-    expect (api.apiGet).toHaveBeenCalledWith (
-        '/posts/versions',
-        { params: { page: 2, limit: 50 } },
-    )
-  })
-})

frontend/src/lib/posts.ts

@@ -1,4 +1,4 @@
-import { apiDelete, apiGet, apiPost, apiPut } from '@/lib/api'
+import { apiDelete, apiGet, apiPost } from '@/lib/api'
 
 import type { FetchPostsParams, Post, PostVersion } from '@/types'
 
@@ -42,30 +42,6 @@ export const fetchPostChanges = async (
 						     page, limit } })
 
 
-export const updatePost = async (
-    post: { id:                     number
-	    title:                  string | null
-	    tags:                   string
-	    parentPostIds:          string
-	    originalCreatedFrom:    string | null
-	    originalCreatedBefore:  string | null },
-    { baseVersionNo, force, merge }: {
-	baseVersionNo?: number
-	force?:         boolean
-	merge?:         boolean }
-) =>
-    await apiPut<Post> (
-	`/posts/${ post.id }`,
-	{ title: post.title,
-	  tags: post.tags,
-	  parent_post_ids: post.parentPostIds,
-	  original_created_from: post.originalCreatedFrom,
-	  original_created_before: post.originalCreatedBefore },
-	{ params: { ...(baseVersionNo && { base_version_no: String (baseVersionNo) }),
-	            force: force ? '1' : '0',
-		    merge: merge ? '1' : '0' } })
-
-
 export const toggleViewedFlg = async (id: string, viewed: boolean): Promise<void> => {
   await (viewed ? apiPost : apiDelete) (`/posts/${ id }/viewed`)
 }

frontend/src/lib/prefetchers.test.ts

@@ -1,112 +0,0 @@
-import { QueryClient } from '@tanstack/react-query'
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import { prefetchForURL } from '@/lib/prefetchers'
-
-const postsApi = vi.hoisted (() => ({
-  fetchPost:        vi.fn (),
-  fetchPostChanges: vi.fn (),
-  fetchPosts:       vi.fn (),
-}))
-
-const tagsApi = vi.hoisted (() => ({
-  fetchTag:        vi.fn (),
-  fetchTagByName:  vi.fn (),
-  fetchTagChanges: vi.fn (),
-  fetchTags:       vi.fn (),
-}))
-
-const wikiApi = vi.hoisted (() => ({
-  fetchWikiPage:        vi.fn (),
-  fetchWikiPageByTitle: vi.fn (),
-  fetchWikiPages:       vi.fn (),
-}))
-
-vi.mock ('@/lib/posts', () => postsApi)
-vi.mock ('@/lib/tags', () => tagsApi)
-vi.mock ('@/lib/wiki', () => wikiApi)
-
-const qc = () => new QueryClient ({
-  defaultOptions: { queries: { retry: false } },
-})
-
-describe ('prefetchForURL', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-    postsApi.fetchPosts.mockResolvedValue ({ posts: [], count: 0 })
-    postsApi.fetchPost.mockResolvedValue ({ id: 1 })
-    postsApi.fetchPostChanges.mockResolvedValue ({ versions: [], count: 0 })
-    tagsApi.fetchTags.mockResolvedValue ({ tags: [], count: 0 })
-    tagsApi.fetchTag.mockResolvedValue ({ id: 1 })
-    tagsApi.fetchTagByName.mockResolvedValue (null)
-    tagsApi.fetchTagChanges.mockResolvedValue ({ versions: [], count: 0 })
-    wikiApi.fetchWikiPages.mockResolvedValue ([])
-    wikiApi.fetchWikiPage.mockResolvedValue ({ id: 1 })
-    wikiApi.fetchWikiPageByTitle.mockResolvedValue (null)
-  })
-
-  it ('prefetches post indexes from query parameters', async () => {
-    await prefetchForURL (
-        qc (),
-        'http://localhost/posts?tags=a+b&match=any&page=2&limit=5&order=title%3Aasc',
-    )
-
-    expect (postsApi.fetchPosts).toHaveBeenCalledWith (
-        expect.objectContaining ({
-          tags:  'a b',
-          match: 'any',
-          page:  2,
-          limit: 5,
-          order: 'title:asc',
-        }),
-    )
-  })
-
-  it ('prefetches post detail pages', async () => {
-    await prefetchForURL (qc (), 'http://localhost/posts/12')
-
-    expect (postsApi.fetchPost).toHaveBeenCalledWith ('12')
-  })
-
-  it ('prefetches tag indexes from query parameters', async () => {
-    await prefetchForURL (
-        qc (),
-        'http://localhost/tags?post=9&name=x&category=general&page=4&post_count_lte=10',
-    )
-
-    expect (tagsApi.fetchTags).toHaveBeenCalledWith (
-        expect.objectContaining ({
-          post:         9,
-          name:         'x',
-          category:     'general',
-          page:         4,
-          postCountLTE: 10,
-        }),
-    )
-  })
-
-  it ('prefetches wiki show pages and related tag/post data', async () => {
-    wikiApi.fetchWikiPageByTitle.mockResolvedValueOnce ({
-      id:    3,
-      title: 'Actual',
-      body:  'body',
-    })
-
-    await prefetchForURL (qc (), 'http://localhost/wiki/Alias')
-
-    expect (wikiApi.fetchWikiPageByTitle).toHaveBeenCalledWith ('Alias', { version: undefined })
-    expect (wikiApi.fetchWikiPage).toHaveBeenCalledWith ('3', {})
-    expect (tagsApi.fetchTagByName).toHaveBeenCalledWith ('Actual')
-    expect (postsApi.fetchPosts).toHaveBeenCalledWith (
-        expect.objectContaining ({ tags: 'Actual', limit: 8 }),
-    )
-  })
-
-  it ('ignores routes without a prefetcher', async () => {
-    await prefetchForURL (qc (), 'http://localhost/unknown')
-
-    expect (postsApi.fetchPosts).not.toHaveBeenCalled ()
-    expect (tagsApi.fetchTags).not.toHaveBeenCalled ()
-    expect (wikiApi.fetchWikiPages).not.toHaveBeenCalled ()
-  })
-})

frontend/src/lib/queryKeys.test.ts

@@ -1,14 +0,0 @@
-import { describe, expect, it } from 'vitest'
-
-import { postsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
-
-describe ('query keys', () => {
-  it ('uses stable namespaces for posts, tags, and wiki', () => {
-    expect (postsKeys.show ('3')).toEqual (['posts', '3'])
-    expect (postsKeys.related ('3')).toEqual (['related', '3'])
-    expect (tagsKeys.deerjikists ('7')).toEqual (['tags', 'deerjikists', '7'])
-    expect (wikiKeys.show ('Title', { version: '2' })).toEqual (
-        ['wiki', 'Title', { version: '2' }],
-    )
-  })
-})

frontend/src/lib/remark-wiki-autolink.test.ts

@@ -1,68 +0,0 @@
-import { describe, expect, it } from 'vitest'
-
-import remarkWikiAutolink from '@/lib/remark-wiki-autolink'
-
-import type { Root } from 'mdast'
-
-describe ('remarkWikiAutolink', () => {
-  it ('links matching wiki page names and prefers longer matches', () => {
-    const tree: Root = {
-      type:     'root',
-      children: [{
-        type:     'paragraph',
-        children: [{ type: 'text', value: '虹夏 and 虹' }],
-      }],
-    }
-
-    remarkWikiAutolink (['虹', '虹夏']) (tree)
-
-    expect (tree.children[0]).toMatchObject ({
-      type:     'paragraph',
-      children: [
-        {
-          type:     'link',
-          url:      '/wiki/%E8%99%B9%E5%A4%8F',
-          children: [{ type: 'text', value: '虹夏' }],
-        },
-        { type: 'text', value: ' and ' },
-        {
-          type:     'link',
-          url:      '/wiki/%E8%99%B9',
-          children: [{ type: 'text', value: '虹' }],
-        },
-      ],
-    })
-  })
-
-  it ('does not link text inside existing links or code', () => {
-    const tree: Root = {
-      type:     'root',
-      children: [
-        {
-          type:     'paragraph',
-          children: [{
-            type:     'link',
-            url:      '/existing',
-            children: [{ type: 'text', value: '虹' }],
-          }],
-        },
-        {
-          type:  'code',
-          value: '虹',
-        },
-      ],
-    }
-
-    remarkWikiAutolink (['虹']) (tree)
-
-    expect (tree.children[0]).toMatchObject ({
-      type:     'paragraph',
-      children: [{
-        type:     'link',
-        url:      '/existing',
-        children: [{ type: 'text', value: '虹' }],
-      }],
-    })
-    expect (tree.children[1]).toMatchObject ({ type: 'code', value: '虹' })
-  })
-})

frontend/src/lib/remark-wiki-autolink.ts

@@ -38,7 +38,7 @@ export default (pageNames: string[], basePath = '/wiki'): ((tree: Root) => void)
 	      let last = 0
 	      const parts: RootContent[] = []
 
-	      while ((m = re.exec (value)) !== null)
+	      while (m = re.exec (value))
 		{
 		  const start = m.index
 		  const end = start + m[0].length
@@ -70,7 +70,7 @@ export default (pageNames: string[], basePath = '/wiki'): ((tree: Root) => void)
 	    }
 	}
 
-      const maybeChidren = 'children' in node ? node.children : undefined
+      const maybeChidren = (node as any).children
       if (Array.isArray (maybeChidren))
 	{
 	  const parent = node as Parent

frontend/src/lib/tags.test.ts

@@ -1,67 +0,0 @@
-import { beforeEach, describe, expect, it, vi } from 'vitest'
-
-import { fetchTag, fetchTagByName, fetchTags } from '@/lib/tags'
-
-import type { FetchTagsParams } from '@/types'
-
-const api = vi.hoisted (() => ({
-  apiGet: vi.fn (),
-}))
-
-vi.mock ('@/lib/api', () => api)
-
-const baseParams: FetchTagsParams = {
-  post:         null,
-  name:         '',
-  category:     null,
-  postCountGTE: 0,
-  postCountLTE: null,
-  createdFrom:  '',
-  createdTo:    '',
-  updatedFrom:  '',
-  updatedTo:    '',
-  page:         1,
-  limit:        30,
-  order:        'updated_at:desc',
-}
-
-describe ('tags API functions', () => {
-  beforeEach (() => {
-    vi.clearAllMocks ()
-  })
-
-  it ('maps tag filters to backend parameters', async () => {
-    api.apiGet.mockResolvedValueOnce ({ tags: [], count: 0 })
-
-    await fetchTags ({
-      ...baseParams,
-      name:         '虹',
-      category:     'character',
-      postCountGTE: 10,
-      postCountLTE: 20,
-    })
-
-    expect (api.apiGet).toHaveBeenCalledWith (
-        '/tags',
-        {
-          params: {
-            name:           '虹',
-            category:       'character',
-            post_count_gte: 10,
-            post_count_lte: 20,
-            page:           1,
-            limit:          30,
-            order:          'updated_at:desc',
-          },
-        },
-    )
-  })
-
-  it ('returns null when tag fetches fail', async () => {
-    api.apiGet.mockRejectedValueOnce (new Error ('missing'))
-    api.apiGet.mockRejectedValueOnce (new Error ('missing'))
-
-    await expect (fetchTag ('1')).resolves.toBeNull ()
-    await expect (fetchTagByName ('unknown')).resolves.toBeNull ()
-  })
-})

frontend/src/lib/utils.test.ts

@@ -1,28 +0,0 @@
-import { describe, expect, it } from 'vitest'
-
-import { cn, originalCreatedAtString, toDate } from '@/lib/utils'
-
-describe ('utils', () => {
-  it ('converts strings to dates and leaves date instances intact', () => {
-    const date = new Date ('2026-01-02T03:04:05Z')
-
-    expect (toDate ('2026-01-02T03:04:05Z')).toBeInstanceOf (Date)
-    expect (toDate (date)).toBe (date)
-  })
-
-  it ('merges conditional Tailwind classes', () => {
-    const hidden = false
-
-    expect (cn ('p-2', hidden && 'hidden', 'p-4')).toBe ('p-4')
-  })
-
-  it ('renders unknown original creation time ranges', () => {
-    expect (originalCreatedAtString (null, null)).toBe ('年月日不詳')
-    expect (
-        originalCreatedAtString (
-            '2026-01-01T00:00:00+09:00',
-            '2026-01-02T00:00:00+09:00',
-        ),
-    ).toContain ('時刻不詳')
-  })
-})