#155

docs/commands.md

@@ -18,12 +18,13 @@ npm install
 npm run dev
 npm run build
 npm run lint
-npm test
+npm run test
+npm run test:run
 ```
 
 ### Full verification
 
 ```sh
 cd backend && bundle exec rspec
-cd ../frontend && npm run build && npm run lint
+cd ../frontend && npm run test:run && npm run build && npm run lint
 ```

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'] },
+  { ignores: ['dist', 'tailwind.config.js'] },
   {
     extends: [js.configs.recommended, ...tseslint.configs.recommended],
     files: ['**/*.{ts,tsx}'],
@@ -19,10 +19,7 @@ export default tseslint.config(
     },
     rules: {
       ...reactHooks.configs.recommended.rules,
-      'react-refresh/only-export-components': [
-        'warn',
-        { allowConstantExport: true },
-      ],
+      'react-refresh/only-export-components': 'off',
     },
   },
 )

frontend/package.json

@@ -8,6 +8,8 @@
     "build": "tsc -b && vite build",
     "postbuild": "node scripts/generate-sitemap.js",
     "lint": "eslint .",
+    "test": "vitest",
+    "test:run": "vitest run",
     "preview": "vite preview"
   },
   "dependencies": {
@@ -45,6 +47,10 @@
   "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",
@@ -58,11 +64,13 @@
     "eslint-plugin-react-hooks": "^5.2.0",
     "eslint-plugin-react-refresh": "^0.4.19",
     "globals": "^16.0.0",
+    "jsdom": "^28.1.0",
     "postcss": "^8.5.3",
     "tailwindcss": "^3.4.13",
     "typescript": "~5.8.3",
     "typescript-eslint": "^8.30.1",
-    "vite": "^6.3.5"
+    "vite": "^6.3.5",
+    "vitest": "^4.1.5"
   },
   "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

@@ -93,7 +93,7 @@ const PostDetailRoute = ({ user }: { user: User | null }) => {
 }
 
 
-export default (() => {
+const App: FC = () => {
   const [user, setUser] = useState<User | null> (null)
   const [status, setStatus] = useState (200)
 
@@ -156,4 +156,6 @@ export default (() => {
 	  </DialogueProvider>
 	</BrowserRouter>
       </>)
-}) satisfies FC
+}
+
+export default App

frontend/src/components/DraggableDroppableTagRow.tsx

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

frontend/src/components/ErrorScreen.tsx

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

frontend/src/components/MaterialSidebar.tsx

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

frontend/src/components/MenuSeparator.tsx

@@ -1,9 +1,11 @@
 import type { FC } from 'react'
 
 
-export default (() => (
+const MenuSeparator: FC = () => (
     <>
       <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"/>
-    </>)) satisfies FC
+    </>)
+
+export default MenuSeparator

frontend/src/components/PostEditForm.tsx

@@ -6,6 +6,7 @@ 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 type { FC, FormEvent } from 'react'
@@ -32,7 +33,7 @@ type Props = { post:    Post
 	       onSave:  (newPost: Post) => void }
 
 
-export default (({ post, onSave }: Props) => {
+const PostEditForm: FC<Props> = ({ post, onSave }) => {
   const [disabled, setDisabled] = useState (false)
   const [originalCreatedBefore, setOriginalCreatedBefore] =
       useState<string | null> (post.originalCreatedBefore)
@@ -62,7 +63,7 @@ export default (({ post, onSave }: Props) => {
     }
     catch (e)
     {
-      const response = (e as any)?.response
+      const response = isApiError<{ mergeable?: boolean }> (e) ? e.response : undefined
 
       if (response?.status !== 409)
 	{
@@ -164,4 +165,6 @@ export default (({ post, onSave }: Props) => {
 	  更新
 	</Button>
       </form>)
-}) satisfies FC<Props>
+}
+
+export default PostEditForm

frontend/src/components/PostEmbed.tsx

@@ -16,8 +16,9 @@ type Props = {
     onMetadataChange?:  (meta: NiconicoMetadata) => void }
 
 
-export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
+const PostEmbed: FC<Props> = ({ ref, post, onLoadComplete, onMetadataChange }) => {
   const dialogue = useDialogue ()
+  const [framed, setFramed] = useState (false)
 
   const url = new URL (post.url)
 
@@ -44,7 +45,7 @@ export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
   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
@@ -72,8 +73,6 @@ export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
     }
   }
 
-  const [framed, setFramed] = useState (false)
-
   return (
       <>
 	{framed
@@ -101,4 +100,6 @@ export default (({ ref, post, onLoadComplete, onMetadataChange }: Props) => {
 	      </a>
 	    </div>)}
       </>)
-}) satisfies FC<Props>
+}
+
+export default PostEmbed

frontend/src/components/PostFormTagsArea.tsx

@@ -36,7 +36,7 @@ type Props = Omit<ComponentPropsWithoutRef<'textarea'>, 'value' | 'onChange' | '
     setTags:  (tags: string) => void }
 
 
-export default (({ tags, setTags, ...rest }: Props) => {
+const PostFormTagsArea: FC<Props> = ({ tags, setTags, ...rest }) => {
   const ref = useRef<HTMLTextAreaElement> (null)
 
   const [bounds, setBounds] = useState<{ start: number; end: number }> ({ start: 0, end: 0 })
@@ -97,4 +97,6 @@ export default (({ tags, setTags, ...rest }: Props) => {
 		activeIndex={-1}
 		onSelect={handleTagSelect}/>)}
       </div>)
-}) satisfies FC<Props>
+}
+
+export default PostFormTagsArea

frontend/src/components/PostList.tsx

@@ -14,7 +14,7 @@ type Props = { posts:     Post[]
 	       onClick?:  (event: MouseEvent<HTMLElement>) => void }
 
 
-export default (({ posts, onClick }: Props) => {
+const PostList: FC<Props> = ({ posts, onClick }) => {
   const location = useLocation ()
 
   const setForLocationKey = useSharedTransitionStore (s => s.setForLocationKey)
@@ -70,4 +70,6 @@ export default (({ posts, onClick }: Props) => {
 	      </PrefetchLink>)
 	})}
       </div>)
-}) satisfies FC<Props>
+}
+
+export default PostList

frontend/src/components/PostOriginalCreatedTimeField.tsx

@@ -12,11 +12,11 @@ type Props = {
     setOriginalCreatedBefore: (x: string | null) => void }
 
 
-export default (({ disabled,
+const PostOriginalCreatedTimeField: FC<Props> = ({ disabled,
 		   originalCreatedFrom,
 		   setOriginalCreatedFrom,
 		   originalCreatedBefore,
-		   setOriginalCreatedBefore }: Props) => (
+		   setOriginalCreatedBefore }) => (
     <div>
       <Label>オリジナルの作成日時</Label>
       <div className="my-1 flex">
@@ -71,4 +71,6 @@ export default (({ disabled,
 	  </Button>
 	</div>
       </div>
-    </div>)) satisfies FC<Props>
+    </div>)
+
+export default PostOriginalCreatedTimeField

frontend/src/components/RouteBlockerOverlay.tsx

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

frontend/src/components/TagDetailSidebar.tsx

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

frontend/src/components/TagLink.tsx

@@ -27,12 +27,12 @@ type Props =
     | PropsWithoutLink
 
 
-export default (({ tag,
+const TagLink: FC<Props> = ({ 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 }`)
@@ -126,4 +126,6 @@ export default (({ tag,
 	{withCount && (
 	    <span className="ml-1">{tag.postCount}</span>)}
       </>)
-}) satisfies FC<Props>
+}
+
+export default TagLink

frontend/src/components/TagSearch.tsx

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

frontend/src/components/TagSearchBox.tsx

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

frontend/src/components/TagSidebar.tsx

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

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)
@@ -80,7 +80,7 @@ export const menuOutline = ({ tag, wikiId, user, pathName }: {
 }
 
 
-export default (({ user }: Props) => {
+const TopNav: FC<Props> = ({ user }) => {
   const location = useLocation ()
 
   const dirRef = useRef<(-1) | 1> (1)
@@ -159,12 +159,12 @@ export default (({ user }: Props) => {
   useEffect (() => {
     const unsubscribe = WikiIdBus.subscribe (setWikiId)
     return () => unsubscribe ()
-  }, [activeIdx])
+  }, [])
 
   useEffect (() => {
     setMenuOpen (false)
     setOpenItemIdx (activeIdx)
-  }, [location])
+  }, [activeIdx, location])
 
   return (
       <>
@@ -433,4 +433,6 @@ export default (({ user }: Props) => {
 	      </motion.div>)}
 	</AnimatePresence>
       </>)
-}) satisfies FC<Props>
+}
+
+export default TopNav

frontend/src/components/TopNavUser.tsx

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

frontend/src/components/TwitterEmbed.tsx

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

frontend/src/components/WikiBody.tsx

@@ -25,7 +25,7 @@ const mdComponents = { a: (({ href, children }) => (
 				  </a>))) } as const satisfies Components
 
 
-export default (({ title, body }: Props) => {
+const WikiBody: FC<Props> = ({ title, body }) => {
   const { data } = useQuery ({
       enabled: Boolean (body),
       queryKey: wikiKeys.index ({ }),
@@ -39,4 +39,6 @@ export default (({ title, body }: Props) => {
       <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>)
-}) satisfies FC<Props>
+}
+
+export default WikiBody

frontend/src/components/common/DateTimeField.tsx

@@ -25,7 +25,7 @@ type Props = Omit<ComponentPropsWithoutRef<'input'>, 'onChange'> & {
     onBlur?:    (ev: FocusEvent<HTMLInputElement>) => void }
 
 
-export default (({ value, onChange, className, onBlur, ...rest }: Props) => {
+const DateTimeField: FC<Props> = ({ value, onChange, className, onBlur, ...rest }) => {
   const [local, setLocal] = useState ('')
 
   useEffect (() => {
@@ -44,4 +44,6 @@ export default (({ value, onChange, className, onBlur, ...rest }: Props) => {
 	    onChange?.(v ? (new Date (v)).toISOString () : null)
 	  }}
 	  onBlur={onBlur}/>)
-}) satisfies FC<Props>
+}
+
+export default DateTimeField

frontend/src/components/common/Form.tsx

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

frontend/src/components/common/Label.tsx

@@ -1,12 +1,14 @@
 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 } }
 
 
-export default ({ children, checkBox }: Props) => {
+const Label: FC<Props> = ({ children, checkBox }) => {
   if (!(checkBox))
     {
       return (
@@ -26,3 +28,5 @@ export default ({ children, checkBox }: Props) => {
         </label>
       </div>)
 }
+
+export default Label

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

@@ -0,0 +1,15 @@
+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

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

frontend/src/components/common/Pagination.tsx

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

frontend/src/components/common/SectionTitle.tsx

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

frontend/src/components/common/SubsectionTitle.tsx

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

frontend/src/components/common/TabGroup.tsx

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

frontend/src/components/common/TagInput.tsx

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

frontend/src/components/dialogues/DialogueProvider.tsx

@@ -57,7 +57,7 @@ let nextDialogueId = 1
 type Props = { children: ReactNode }
 
 
-export default (({ children }: Props) => {
+const DialogueProvider: FC<Props> = ({ children }) => {
   const [queue, setQueue] = useState<DialogueRequest[]> ([])
 
   const push = useCallback ((request: Omit<DialogueRequest, 'id'>) => {
@@ -174,7 +174,7 @@ export default (({ children }: Props) => {
 	      </DialogContent>)}
 	</Dialog>
       </DialogueContext.Provider>)
-}) satisfies FC<Props>
+}
 
 
 export const useDialogue = () => {
@@ -185,3 +185,5 @@ export const useDialogue = () => {
 
   return dialogue
 }
+
+export default DialogueProvider

frontend/src/components/layout/MainArea.tsx

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

frontend/src/components/layout/SidebarComponent.tsx

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

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

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

frontend/src/components/users/InheritDialogue.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useState } from 'react'
 
 import { useDialogue } from '@/components/dialogues/DialogueProvider'
@@ -18,7 +20,7 @@ type Props = { visible:         boolean
 	       setUser:         (user: User) => void }
 
 
-export default ({ visible, onVisibleChange, setUser }: Props) => {
+const InheritDialogue: FC<Props> = ({ visible, onVisibleChange, setUser }) => {
   const dialogue = useDialogue ()
 
   const [inputCode, setInputCode] = useState ('')
@@ -68,3 +70,5 @@ export default ({ visible, onVisibleChange, setUser }: Props) => {
 	</DialogContent>
       </Dialog>)
 }
+
+export default InheritDialogue

frontend/src/components/users/UserCodeDialogue.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import { Button } from '@/components/ui/button'
 import { Dialog,
@@ -17,7 +19,7 @@ type Props = { visible:         boolean
 	       setUser:         React.Dispatch<React.SetStateAction<User | null>> }
 
 
-export default ({ visible, onVisibleChange, user, setUser }: Props) => {
+const UserCodeDialogue: FC<Props> = ({ visible, onVisibleChange, user, setUser }) => {
   const dialogue = useDialogue ()
 
   const handleChange = async () => {
@@ -69,3 +71,5 @@ export default ({ visible, onVisibleChange, user, setUser }: Props) => {
 	</DialogContent>
       </Dialog>)
 }
+
+export default UserCodeDialogue

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 any, { deep: true }) as T
+  return toCamel (res.data as Record<string, unknown>, { 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 any, { deep: true }) as T
+  return toCamel (res.data as Record<string, unknown>, { deep: true }) as T
 }
 
 
@@ -72,4 +72,5 @@ export const apiDelete = async (
 }
 
 
-export const isApiError = (err: unknown): err is AxiosError => axios.isAxiosError (err)
+export const isApiError = <T = unknown> (err: unknown): err is AxiosError<T> =>
+    axios.isAxiosError (err)

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))
+	      while ((m = re.exec (value)) !== null)
 		{
 		  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 = (node as any).children
+      const maybeChidren = 'children' in node ? node.children : undefined
       if (Array.isArray (maybeChidren))
 	{
 	  const parent = node as Parent

frontend/src/pages/Forbidden.tsx

@@ -1,4 +1,8 @@
+import type { FC } from 'react'
+
 import ErrorScreen from '@/components/ErrorScreen'
 
 
-export default () => <ErrorScreen status={403}/>
+const Forbidden: FC = () => <ErrorScreen status={403}/>
+
+export default Forbidden

frontend/src/pages/MorePage.tsx

@@ -11,7 +11,7 @@ import type { FC } from 'react'
 import type { User } from '@/types'
 
 
-export default (() => {
+const MorePage: FC = () => {
   const menu = menuOutline (
       { tag: null, wikiId: null, user: { } as User, pathName: location.pathname })
 
@@ -43,4 +43,6 @@ export default (() => {
 		  </section>))}
 	    </div>))}
       </MainArea>)
-}) satisfies FC
+}
+
+export default MorePage

frontend/src/pages/NotFound.tsx

@@ -1,4 +1,8 @@
+import type { FC } from 'react'
+
 import ErrorScreen from '@/components/ErrorScreen'
 
 
-export default () => <ErrorScreen status={404}/>
+const NotFound: FC = () => <ErrorScreen status={404}/>
+
+export default NotFound

frontend/src/pages/ServiceUnavailable.tsx

@@ -1,4 +1,8 @@
+import type { FC } from 'react'
+
 import ErrorScreen from '@/components/ErrorScreen'
 
 
-export default () => <ErrorScreen status={503}/>
+const ServiceUnavailable: FC = () => <ErrorScreen status={503}/>
+
+export default ServiceUnavailable

frontend/src/pages/deerjikists/DeerjikistDetailPage.tsx

@@ -1,5 +1,5 @@
 import { useQuery, useQueryClient } from '@tanstack/react-query'
-import { useEffect, useState } from 'react'
+import { useEffect, useMemo, useState } from 'react'
 import { useParams } from 'react-router-dom'
 
 import TagLink from '@/components/TagLink'
@@ -18,7 +18,7 @@ import type { FC, FormEvent } from 'react'
 import type { Deerjikist, Platform } from '@/types'
 
 
-export default (() => {
+const DeerjikistDetailPage: FC = () => {
   const { id } = useParams ()
   const tagId = String (id ?? '')
   const tagKey = tagsKeys.deerjikists (tagId)
@@ -26,7 +26,7 @@ export default (() => {
   const { data: qData, isLoading: loading } =
       useQuery ({ queryKey: tagKey, queryFn: () => fetchDeerjikistsByTag (tagId) })
   const tag = qData?.tag
-  const deerjikists = qData?.deerjikists ?? []
+  const deerjikists = useMemo (() => qData?.deerjikists ?? [], [qData])
 
   const [data, setData] =
       useState<(Omit<Deerjikist, 'platform'> & { platform: Platform | null })[]> ([])
@@ -152,4 +152,6 @@ export default (() => {
 	    </div>
 	)}
       </MainArea>)
-}) satisfies FC
+}
+
+export default DeerjikistDetailPage

frontend/src/pages/materials/MaterialBasePage.tsx

@@ -5,8 +5,10 @@ import MaterialSidebar from '@/components/MaterialSidebar'
 import type { FC } from 'react'
 
 
-export default (() => (
+const MaterialBasePage: FC = () => (
     <div className="md:flex md:flex-1 overflow-y-auto md:overflow-y-hidden">
       <MaterialSidebar/>
       <Outlet/>
-    </div>)) satisfies FC
+    </div>)
+
+export default MaterialBasePage

frontend/src/pages/materials/MaterialDetailPage.tsx

@@ -21,7 +21,7 @@ import type { Material, Tag } from '@/types'
 type MaterialWithTag = Material & { tag: Tag }
 
 
-export default (() => {
+const MaterialDetailPage: FC = () => {
   const { id } = useParams ()
 
   const [file, setFile] = useState<File | null> (null)
@@ -179,4 +179,6 @@ export default (() => {
 	      </TabGroup>
 	    </>))}
       </MainArea>)
-}) satisfies FC
+}
+
+export default MaterialDetailPage

frontend/src/pages/materials/MaterialListPage.tsx

@@ -41,7 +41,7 @@ const MaterialCard = ({ tag }: { tag: TagWithMaterial }) => {
 }
 
 
-export default (() => {
+const MaterialListPage: FC = () => {
   const [loading, setLoading] = useState (false)
   const [tag, setTag] = useState<TagWithMaterial | null> (null)
 
@@ -69,7 +69,7 @@ export default (() => {
 	setLoading (false)
       }
     }) ()
-  }, [location.search])
+  }, [location.search, tagQuery])
 
   return (
       <MainArea>
@@ -163,4 +163,6 @@ export default (() => {
 		  </ul>
 		</>))}
       </MainArea>)
-}) satisfies FC
+}
+
+export default MaterialListPage

frontend/src/pages/materials/MaterialNewPage.tsx

@@ -15,7 +15,7 @@ import { apiPost } from '@/lib/api'
 import type { FC } from 'react'
 
 
-export default (() => {
+const MaterialNewPage: FC = () => {
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const tagQuery = query.get ('tag') ?? ''
@@ -121,4 +121,6 @@ export default (() => {
 	  </Button>
 	</Form>
       </MainArea>)
-}) satisfies FC
+}
+
+export default MaterialNewPage

frontend/src/pages/materials/MaterialSearchPage.tsx

@@ -10,7 +10,7 @@ import { SITE_TITLE } from '@/config'
 import type { FC, FormEvent } from 'react'
 
 
-export default (() => {
+const MaterialSearchPage: FC = () => {
   const [tagName, setTagName] = useState ('')
   const [parentTagName, setParentTagName] = useState ('')
 
@@ -46,4 +46,6 @@ export default (() => {
 	  </form>
 	</div>
       </MainArea>)
-}) satisfies FC
+}
+
+export default MaterialSearchPage

frontend/src/pages/posts/PostDetailPage.tsx

@@ -13,6 +13,7 @@ import MainArea from '@/components/layout/MainArea'
 import { Button } from '@/components/ui/button'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
+import { isApiError } from '@/lib/api'
 import { fetchPost, toggleViewedFlg } from '@/lib/posts'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
 import { cn } from '@/lib/utils'
@@ -26,7 +27,7 @@ import type { NiconicoViewerHandle, Post, User } from '@/types'
 type Props = { user: User | null }
 
 
-export default (({ user }: Props) => {
+const PostDetailPage: FC<Props> = ({ user }) => {
   const { id } = useParams ()
   const postId = String (id ?? '')
   const postKey = postsKeys.show (postId)
@@ -44,16 +45,16 @@ export default (({ user }: Props) => {
 
   const changeViewedFlg = useMutation ({
       mutationFn: async () => {
-	const cur = qc.getQueryData<any> (postKey)
+	const cur = qc.getQueryData<Post> (postKey)
 	const next = !(cur?.viewed)
 	await toggleViewedFlg (postId, next)
 	return next
       },
       onMutate: async () => {
 	await qc.cancelQueries ({ queryKey: postKey })
-	const prev = qc.getQueryData<any> (postKey)
+	const prev = qc.getQueryData<Post> (postKey)
 	qc.setQueryData (postKey,
-			 (cur: any) => cur ? { ...cur, viewed: !(cur.viewed) } : cur)
+			 (cur: Post | undefined) => cur ? { ...cur, viewed: !(cur.viewed) } : cur)
 	return { prev }
       },
       onError: (...[, , ctx]) => {
@@ -69,7 +70,7 @@ export default (({ user }: Props) => {
     if (!(errorFlg))
       return
 
-    const code = (error as any)?.response.status ?? (error as any)?.status
+    const code = isApiError (error) ? error.response?.status : undefined
     if (code)
       setStatus (code)
   }, [errorFlg, error])
@@ -171,7 +172,7 @@ export default (({ user }: Props) => {
 			    post={post}
 			 onSave={newPost => {
 			      qc.setQueryData (postsKeys.show (postId),
-					       (prev: any) => newPost ?? prev)
+					       (prev: Post | undefined) => newPost ?? prev)
 			      qc.invalidateQueries ({ queryKey: postsKeys.root })
 			      qc.invalidateQueries ({ queryKey: tagsKeys.root })
 			    }}/>
@@ -185,4 +186,6 @@ export default (({ user }: Props) => {
 	  {post && <TagDetailSidebar post={post} sp/>}
 	</div>
       </div>)
-}) satisfies FC<Props>
+}
+
+export default PostDetailPage

frontend/src/pages/posts/PostHistoryPage.tsx

@@ -35,7 +35,7 @@ const renderDiff = (diff: { current: string | null; prev: string | null }) => (
     </>)
 
 
-export default (() => {
+const PostHistoryPage: FC = () => {
   const dialogue = useDialogue ()
 
   const location = useLocation ()
@@ -48,11 +48,11 @@ export default (() => {
   // 投稿列の結合で使用
   let rowsCnt: number
 
-  const { data: tag } =
-      tagId
-      ? useQuery ({ queryKey: tagsKeys.show (tagId),
-		    queryFn: () => fetchTag (tagId) })
-      : { data: null }
+  const tagQueryId = tagId ?? ''
+  const { data: tag } = useQuery ({
+      enabled:  Boolean (tagId),
+      queryKey: tagsKeys.show (tagQueryId),
+      queryFn:  () => fetchTag (tagQueryId) })
 
   const { data, isLoading: loading } = useQuery ({
       queryKey: postsKeys.changes ({ ...(id && { post: id }),
@@ -290,4 +290,6 @@ export default (() => {
 	      <Pagination page={page} totalPages={totalPages}/>
 	    </>)}
       </MainArea>)
-}) satisfies FC
+}
+
+export default PostHistoryPage

frontend/src/pages/posts/PostListPage.tsx

@@ -1,5 +1,5 @@
 import { useQuery } from '@tanstack/react-query'
-import { useLayoutEffect, useRef, useState } from 'react'
+import { useLayoutEffect, useMemo, useRef, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useLocation } from 'react-router-dom'
 
@@ -20,7 +20,7 @@ import type { FC } from 'react'
 import type { WikiPage } from '@/types'
 
 
-export default (() => {
+const PostListPage: FC = () => {
   const containerRef = useRef<HTMLDivElement | null> (null)
 
   const [wikiPage, setWikiPage] = useState<WikiPage | null> (null)
@@ -30,7 +30,7 @@ export default (() => {
   const tagsQuery = query.get ('tags') ?? ''
   const anyFlg = query.get ('match') === 'any'
   const match = anyFlg ? 'any' : 'all'
-  const tags = tagsQuery.split (' ').filter (e => e !== '')
+  const tags = useMemo (() => tagsQuery.split (' ').filter (e => e !== ''), [tagsQuery])
   const tagsKey = tags.join (' ')
   const page = Number (query.get ('page') ?? 1)
   const limit = Number (query.get ('limit') ?? 20)
@@ -66,7 +66,7 @@ export default (() => {
 	;
       }
     }) ()
-  }, [location.search])
+  }, [location.search, tags])
 
   return (
       <div
@@ -76,7 +76,7 @@ export default (() => {
 	  <title>
 	    {tags.length
 	     ? `${ tags.join (anyFlg ? ' or ' : ' and ') } | ${ SITE_TITLE }`
-	     : `${ SITE_TITLE }　〜 ぼざろクリーチャーシリーズ綜合リンク集サイト`}
+	     : `${ SITE_TITLE }\u3000〜 ぼざろクリーチャーシリーズ綜合リンク集サイト`}
 	  </title>
 	</Helmet>
 
@@ -112,4 +112,6 @@ export default (() => {
 	  </TabGroup>
 	</MainArea>
       </div>)
-}) satisfies FC
+}
+
+export default PostListPage

frontend/src/pages/posts/PostNewPage.tsx

@@ -1,4 +1,4 @@
-import { useEffect, useState, useRef } from 'react'
+import { useCallback, useEffect, useState, useRef } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useNavigate } from 'react-router-dom'
 
@@ -21,9 +21,8 @@ import type { User } from '@/types'
 type Props = { user: User | null }
 
 
-export default (({ user }: Props) => {
-  if (!(['admin', 'member'].some (r => user?.role === r)))
-    return <Forbidden/>
+const PostNewPage: FC<Props> = ({ user }) => {
+  const editable = ['admin', 'member'].some (r => user?.role === r)
 
   const navigate = useNavigate ()
 
@@ -41,6 +40,7 @@ export default (({ user }: Props) => {
   const [url, setURL] = useState ('')
 
   const previousURLRef = useRef ('')
+  const thumbnailPreviewRef = useRef ('')
 
   const handleSubmit = async () => {
     const formData = new FormData
@@ -67,16 +67,6 @@ export default (({ user }: Props) => {
     }
   }
 
-  useEffect (() => {
-    if (titleAutoFlg && url)
-      fetchTitle ()
-  }, [titleAutoFlg])
-
-  useEffect (() => {
-    if (thumbnailAutoFlg && url)
-      fetchThumbnail ()
-  }, [thumbnailAutoFlg])
-
   const handleURLBlur = () => {
     if (!(url) || url === previousURLRef.current)
       return
@@ -88,20 +78,20 @@ export default (({ user }: Props) => {
     previousURLRef.current = url
   }
 
-  const fetchTitle = async () => {
+  const fetchTitle = useCallback (async () => {
     setTitle ('')
     setTitleLoading (true)
     const data = await apiGet<{ title: string }> ('/preview/title', { params: { url } })
     setTitle (data.title || '')
     setTitleLoading (false)
-  }
+  }, [url])
 
-  const fetchThumbnail = async () => {
+  const fetchThumbnail = useCallback (async () => {
     setThumbnailPreview ('')
     setThumbnailFile (null)
     setThumbnailLoading (true)
-    if (thumbnailPreview)
-      URL.revokeObjectURL (thumbnailPreview)
+    if (thumbnailPreviewRef.current)
+      URL.revokeObjectURL (thumbnailPreviewRef.current)
     const data = await apiGet<Blob> ('/preview/thumbnail',
 				     { params: { url }, responseType: 'blob' })
     const imageURL = URL.createObjectURL (data)
@@ -110,7 +100,24 @@ export default (({ user }: Props) => {
 				'thumbnail.png',
 				{ type: data.type || 'image/png' }))
     setThumbnailLoading (false)
-  }
+  }, [url])
+
+  useEffect (() => {
+    thumbnailPreviewRef.current = thumbnailPreview
+  }, [thumbnailPreview])
+
+  useEffect (() => {
+    if (titleAutoFlg && url)
+      fetchTitle ()
+  }, [fetchTitle, titleAutoFlg, url])
+
+  useEffect (() => {
+    if (thumbnailAutoFlg && url)
+      fetchThumbnail ()
+  }, [fetchThumbnail, thumbnailAutoFlg, url])
+
+  if (!(editable))
+    return <Forbidden/>
 
   return (
       <MainArea>
@@ -207,4 +214,6 @@ export default (({ user }: Props) => {
 	  </Button>
 	</Form>
       </MainArea>)
-}) satisfies FC<Props>
+}
+
+export default PostNewPage

frontend/src/pages/posts/PostSearchPage.tsx

@@ -32,7 +32,7 @@ const setIf = (qs: URLSearchParams, k: string, v: string | null) => {
 }
 
 
-export default (() => {
+const PostSearchPage: FC = () => {
   const location = useLocation ()
 
   const navigate = useNavigate ()
@@ -96,7 +96,8 @@ export default (() => {
     setUpdatedTo (qUpdatedTo)
 
     document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
+  }, [location.search, qCreatedFrom, qCreatedTo, qMatch, qOriginalCreatedFrom,
+      qOriginalCreatedTo, qTags, qTitle, qUpdatedFrom, qUpdatedTo, qURL])
 
   const search = async () => {
     const qs = new URLSearchParams ()
@@ -336,4 +337,6 @@ export default (() => {
 	      <Pagination page={page} totalPages={totalPages}/>
 	    </div>) : '結果ないよ（笑）')}
       </MainArea>)
-}) satisfies FC
+}
+
+export default PostSearchPage

frontend/src/pages/tags/NicoTagListPage.tsx

@@ -1,4 +1,6 @@
-import { useEffect, useRef, useState } from 'react'
+import type { FC } from 'react'
+
+import { useCallback, useEffect, useRef, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 
 import TagLink from '@/components/TagLink'
@@ -14,7 +16,7 @@ import type { NicoTag, Tag, User } from '@/types'
 type Props = { user: User | null }
 
 
-export default ({ user }: Props) => {
+const NicoTagListPage: FC<Props> = ({ user }) => {
   const [cursor, setCursor] = useState ('')
   const [editing, setEditing] = useState<{ [key: number]: boolean }> ({ })
   const [loading, setLoading] = useState (false)
@@ -25,12 +27,8 @@ export default ({ user }: Props) => {
 
   const memberFlg = ['admin', 'member'].some (r => user?.role === r)
 
-  const loadMore = async (withCursor: boolean) => {
-    setLoading (true)
-
-    const data = await apiGet<{ tags: NicoTag[]; nextCursor: string }> (
-	'/tags/nico', { params: withCursor ? { cursor } : { } })
-
+  const applyLoadedTags = useCallback ((data: { tags: NicoTag[]; nextCursor: string },
+					withCursor: boolean) => {
     setNicoTags (tags => [...(withCursor ? tags : []), ...data.tags])
     setCursor (data.nextCursor)
 
@@ -40,9 +38,26 @@ export default ({ user }: Props) => {
     const newRawTags = Object.fromEntries (
 	data.tags.map (t => [t.id, t.linkedTags.map (lt => lt.name).join (' ')]))
     setRawTags (rawTags => ({ ...rawTags, ...newRawTags }))
+  }, [])
+
+  const loadInitial = useCallback (async () => {
+    setLoading (true)
+
+    const data = await apiGet<{ tags: NicoTag[]; nextCursor: string }> ('/tags/nico')
+    applyLoadedTags (data, false)
 
     setLoading (false)
-  }
+  }, [applyLoadedTags])
+
+  const loadMore = useCallback (async () => {
+    setLoading (true)
+
+    const data = await apiGet<{ tags: NicoTag[]; nextCursor: string }> (
+	'/tags/nico', { params: { cursor } })
+    applyLoadedTags (data, true)
+
+    setLoading (false)
+  }, [applyLoadedTags, cursor])
 
   const handleEdit = async (id: number) => {
     if (editing[id])
@@ -67,7 +82,7 @@ export default ({ user }: Props) => {
   useEffect(() => {
     const observer = new IntersectionObserver (entries => {
       if (entries[0].isIntersecting && !(loading) && cursor)
-	loadMore (true)
+	loadMore ()
     }, { threshold: 1 })
 
     const target = loaderRef.current
@@ -78,12 +93,12 @@ export default ({ user }: Props) => {
       if (target)
 	observer.unobserve (target)
     }
-  }, [loaderRef, loading])
+  }, [cursor, loadMore, loading])
 
   useEffect (() => {
     setNicoTags ([])
-    loadMore (false)
-  }, [])
+    loadInitial ()
+  }, [loadInitial])
 
   return (
       <MainArea>
@@ -147,3 +162,5 @@ export default ({ user }: Props) => {
 	</div>
       </MainArea>)
 }
+
+export default NicoTagListPage

frontend/src/pages/tags/TagDetailPage.tsx

@@ -18,7 +18,7 @@ import type { FC, FormEvent } from 'react'
 import type { Category, Tag } from '@/types'
 
 
-export default (() => {
+const TagDetailPage: FC = () => {
   const { id } = useParams ()
   const tagId = String (id ?? '')
   const tagKey = tagsKeys.show (tagId)
@@ -155,4 +155,6 @@ export default (() => {
 	      </form>
 	    </div>)}
       </MainArea>)
-}) satisfies FC
+}
+
+export default TagDetailPage

frontend/src/pages/tags/TagHistoryPage.tsx

@@ -31,7 +31,7 @@ const renderDiff = (diff: { current: string | null; prev: string | null }) => (
     </>)
 
 
-export default (() => {
+const TagHistoryPage: FC = () => {
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const id = query.get ('id')
@@ -209,4 +209,6 @@ export default (() => {
 	      <Pagination page={page} totalPages={totalPages}/>
 	    </>)}
       </MainArea>)
-}) satisfies FC
+}
+
+export default TagHistoryPage

frontend/src/pages/tags/TagListPage.tsx

@@ -29,7 +29,7 @@ const setIf = (qs: URLSearchParams, k: string, v: string | null) => {
 }
 
 
-export default (() => {
+const TagListPage: FC = () => {
   const location = useLocation ()
 
   const navigate = useNavigate ()
@@ -87,7 +87,8 @@ export default (() => {
     setUpdatedTo (qUpdatedTo)
 
     document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
+  }, [location.search, qCategory, qCreatedFrom, qCreatedTo, qName, qPostCountGTE,
+      qPostCountLTE, qUpdatedFrom, qUpdatedTo])
 
   const handleSearch = (e: FormEvent) => {
     e.preventDefault ()
@@ -296,4 +297,6 @@ export default (() => {
 	      <Pagination page={page} totalPages={totalPages}/>
 	    </div>) : '結果ないよ（笑）')}
       </MainArea>)
-}) satisfies FC
+}
+
+export default TagListPage

frontend/src/pages/theatres/TheatreDetailPage.tsx

@@ -9,7 +9,7 @@ import TagDetailSidebar from '@/components/TagDetailSidebar'
 import MainArea from '@/components/layout/MainArea'
 import SidebarComponent from '@/components/layout/SidebarComponent'
 import { SITE_TITLE } from '@/config'
-import { apiGet, apiPatch, apiPost, apiPut } from '@/lib/api'
+import { apiGet, apiPatch, apiPost, apiPut, isApiError } from '@/lib/api'
 import { fetchPost } from '@/lib/posts'
 import { dateString } from '@/lib/utils'
 
@@ -34,11 +34,12 @@ const INITIAL_THEATRE_INFO =
       watchingUsers: [] as { id: number; name: string }[] } as const
 
 
-export default (() => {
+const TheatreDetailPage: FC = () => {
   const { id } = useParams ()
 
   const commentsRef = useRef<HTMLDivElement> (null)
   const embedRef = useRef<NiconicoViewerHandle> (null)
+  const loadingRef = useRef (false)
   const theatreInfoRef = useRef<TheatreInfo> (INITIAL_THEATRE_INFO)
   const videoLengthRef = useRef (0)
   const lastCommentNoRef = useRef (0)
@@ -53,6 +54,10 @@ export default (() => {
   const [post, setPost] = useState<Post | null> (null)
   const [videoLength, setVideoLength] = useState (0)
 
+  useEffect (() => {
+    loadingRef.current = loading
+  }, [loading])
+
   useEffect (() => {
     theatreInfoRef.current = theatreInfo
   }, [theatreInfo])
@@ -87,7 +92,7 @@ export default (() => {
       }
       catch (error)
       {
-	setStatus ((error as any)?.response.status ?? 200)
+	setStatus (isApiError (error) ? error.response?.status ?? 200 : 200)
       }
     }) ()
 
@@ -160,7 +165,7 @@ export default (() => {
   }, [id])
 
   useEffect (() => {
-    if (!(id) || !(theatreInfo.hostFlg) || loading || theatreInfo.postId != null)
+    if (!(id) || !(theatreInfo.hostFlg) || loadingRef.current || theatreInfo.postId != null)
       return
 
     let cancelled = false
@@ -338,4 +343,6 @@ export default (() => {
 	  {post && <TagDetailSidebar post={post} sp/>}
 	</div>
       </div>)
-}) satisfies FC
+}
+
+export default TheatreDetailPage

frontend/src/pages/users/SettingPage.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useEffect, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 
@@ -18,7 +20,7 @@ type Props = { user:    User | null
 	       setUser: React.Dispatch<React.SetStateAction<User | null>> }
 
 
-export default ({ user, setUser }: Props) => {
+const SettingPage: FC<Props> = ({ user, setUser }) => {
   const [name, setName] = useState ('')
   const [userCodeVsbl, setUserCodeVsbl] = useState (false)
   const [inheritVsbl, setInheritVsbl] = useState (false)
@@ -110,3 +112,5 @@ export default ({ user, setUser }: Props) => {
 			 setUser={setUser}/>
       </MainArea>)
 }
+
+export default SettingPage

frontend/src/pages/wiki/WikiDetailPage.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useQuery } from '@tanstack/react-query'
 import { useEffect, useMemo } from 'react'
 import { Helmet } from 'react-helmet-async'
@@ -19,7 +21,7 @@ import { fetchWikiPage, fetchWikiPageByTitle } from '@/lib/wiki'
 import type { Tag } from '@/types'
 
 
-export default () => {
+const WikiDetailPage: FC = () => {
   const params = useParams ()
   const title = params.title ?? ''
 
@@ -126,3 +128,5 @@ export default () => {
 	</article>
       </MainArea>)
 }
+
+export default WikiDetailPage

frontend/src/pages/wiki/WikiDiffPage.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useEffect, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useLocation, useParams } from 'react-router-dom'
@@ -11,7 +13,7 @@ import { cn } from '@/lib/utils'
 import type { WikiPageDiff } from '@/types'
 
 
-export default () => {
+const WikiDiffPage: FC = () => {
   const { id } = useParams ()
 
   const location = useLocation ()
@@ -26,7 +28,7 @@ export default () => {
     void (async () => {
       setDiff (await apiGet<WikiPageDiff> (`/wiki/${ id }/diff`, { params: { from, to } }))
     }) ()
-  }, [])
+  }, [from, id, to])
 
   return (
       <MainArea>
@@ -46,3 +48,5 @@ export default () => {
 	</div>
       </MainArea>)
 }
+
+export default WikiDiffPage

frontend/src/pages/wiki/WikiEditPage.tsx

@@ -23,9 +23,8 @@ const mdParser = new MarkdownIt
 type Props = { user: User | null }
 
 
-export default (({ user }: Props) => {
-  if (!(['admin', 'member'].some (r => user?.role === r)))
-    return <Forbidden/>
+const WikiEditPage: FC<Props> = ({ user }) => {
+  const editable = ['admin', 'member'].some (r => user?.role === r)
 
   const { id } = useParams ()
 
@@ -59,6 +58,9 @@ export default (({ user }: Props) => {
   }
 
   useEffect (() => {
+    if (!(editable))
+      return
+
     void (async () => {
       setLoading (true)
       const data = await apiGet<WikiPage> (`/wiki/${ id }`)
@@ -66,7 +68,10 @@ export default (({ user }: Props) => {
       setBody (data.body)
       setLoading (false)
     }) ()
-  }, [id])
+  }, [editable, id])
+
+  if (!(editable))
+    return <Forbidden/>
 
   return (
       <MainArea>
@@ -105,4 +110,6 @@ export default (({ user }: Props) => {
 	      </>)}
 	</div>
       </MainArea>)
-}) satisfies FC<Props>
+}
+
+export default WikiEditPage

frontend/src/pages/wiki/WikiHistoryPage.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import { useEffect, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
 import { useLocation } from 'react-router-dom'
@@ -12,7 +14,7 @@ import { dateString } from '@/lib/utils'
 import type { WikiPageChange } from '@/types'
 
 
-export default () => {
+const WikiHistoryPage: FC = () => {
   const [changes, setChanges] = useState<WikiPageChange[]> ([])
 
   const location = useLocation ()
@@ -23,7 +25,7 @@ export default () => {
     void (async () => {
       setChanges (await apiGet<WikiPageChange[]> ('/wiki/changes', { params: id ? { id } : { } }))
     }) ()
-  }, [location.search])
+  }, [id, location.search])
 
   return (
       <MainArea>
@@ -73,3 +75,5 @@ export default () => {
 	</table>
       </MainArea>)
 }
+
+export default WikiHistoryPage

frontend/src/pages/wiki/WikiNewPage.tsx

@@ -1,3 +1,5 @@
+import type { FC } from 'react'
+
 import MarkdownIt from 'markdown-it'
 import { useState } from 'react'
 import { Helmet } from 'react-helmet-async'
@@ -19,9 +21,8 @@ const mdParser = new MarkdownIt
 type Props = { user: User | null }
 
 
-export default ({ user }: Props) => {
-  if (!(['admin', 'member'].some (r => user?.role === r)))
-    return <Forbidden/>
+const WikiNewPage: FC<Props> = ({ user }) => {
+  const editable = ['admin', 'member'].some (r => user?.role === r)
 
   const location = useLocation ()
   const navigate = useNavigate ()
@@ -50,6 +51,9 @@ export default ({ user }: Props) => {
     }
   }
 
+  if (!(editable))
+    return <Forbidden/>
+
   return (
       <MainArea>
 	<Helmet>
@@ -85,3 +89,5 @@ export default ({ user }: Props) => {
 	</div>
       </MainArea>)
 }
+
+export default WikiNewPage

frontend/src/pages/wiki/WikiSearchPage.tsx

@@ -8,12 +8,12 @@ import { SITE_TITLE } from '@/config'
 import { apiGet } from '@/lib/api'
 import { dateString } from '@/lib/utils'
 
-import type { FormEvent } from 'react'
+import type { FormEvent , FC } from 'react'
 
 import type { WikiPage } from '@/types'
 
 
-export default () => {
+const WikiSearchPage: FC = () => {
   const [title, setTitle] = useState ('')
   const [text, setText] = useState ('')
   const [results, setResults] = useState<WikiPage[]> ([])
@@ -28,7 +28,9 @@ export default () => {
   }
 
   useEffect (() => {
-    search ()
+    void (async () => {
+      setResults (await apiGet ('/wiki', { params: { title: '' } }))
+    }) ()
   }, [])
 
   return (
@@ -93,3 +95,5 @@ export default () => {
 	</div>
       </MainArea>)
 }
+
+export default WikiSearchPage

frontend/src/test/setup.ts

@@ -0,0 +1 @@
+import '@testing-library/jest-dom/vitest'

frontend/tsconfig.node.json

@@ -21,5 +21,5 @@
     "noFallthroughCasesInSwitch": true,
     "noUncheckedSideEffectImports": true
   },
-  "include": ["vite.config.ts"]
+  "include": ["vite.config.ts", "vitest.config.ts"]
 }

frontend/vitest.config.ts

@@ -0,0 +1,12 @@
+import mdx from '@mdx-js/rollup'
+import react from '@vitejs/plugin-react'
+import path from 'path'
+import { defineConfig } from 'vitest/config'
+
+
+export default defineConfig ({
+    plugins:  [mdx ({ providerImportSource: '@/mdx-components' }), react ()],
+    resolve:  { alias: { '@': path.resolve (__dirname, './src') } },
+    test:     { environment:  'jsdom',
+		setupFiles:   './src/test/setup.ts',
+		globals:      false } })