設定画面 (#34) (#397)

Reviewed-on: #397
Co-authored-by: miteruzo <miteruzo@naver.com>
Co-committed-by: miteruzo <miteruzo@naver.com>

frontend/src/pages/GekanatorPage.tsx

@@ -24,6 +24,11 @@ import { recoverCandidatePosts } from '@/lib/gekanatorCandidateRecovery'
 import { isQuestionHardFilteredAfterAnswers,
 	 monthForCondition } from '@/lib/gekanatorQuestionFilters'
 import { gekanatorKeys } from '@/lib/queryKeys'
+import {
+  getClientGekanatorBackgroundMotion,
+  setClientGekanatorBackgroundMotion,
+} from '@/lib/settings'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'
 
 import type { FC } from 'react'
@@ -185,7 +190,6 @@ const softenedAnswerWeight = .35
 const confidenceTemperature = 6
 const gameStorageKey = 'gekanator:game:v1'
 const recentGamesStorageKey = 'gekanator:recent-games:v1'
-const backgroundMotionStorageKey = 'gekanator:background-motion:v1'
 const maxStoredRecentGames = 12
 const specialOriginalMonthDayLabels: Record<string, string> = {
     '1-1': '元日',
@@ -429,18 +433,13 @@ const storeRecentGameSummary = (
 
 
 const loadBackgroundMotionMode = (): BackgroundMotionMode => {
-  const fallbackMode = 'on'
   try
   {
-    const raw = localStorage.getItem (backgroundMotionStorageKey)
-    if (raw === 'off' || raw === 'calm' || raw === 'on')
-      return raw
-
-    return fallbackMode
+    return getClientGekanatorBackgroundMotion ()
   }
   catch
   {
-    return fallbackMode
+    return 'on'
   }
 }
 
@@ -3679,6 +3678,8 @@ const expectedAnswerFor = (
 
 
 const GekanatorPage: FC<{ user: User | null }> = ({ user }) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const storedGame = useMemo (loadStoredGame, [])
   const hasStoredRestore = storedGame != null && isStoredPhase (storedGame.phase)
   const queryClient = useQueryClient ()
@@ -3916,7 +3917,7 @@ const GekanatorPage: FC<{ user: User | null }> = ({ user }) => {
   useEffect (() => {
     try
     {
-      localStorage.setItem (backgroundMotionStorageKey, backgroundMotionMode)
+      setClientGekanatorBackgroundMotion (backgroundMotionMode)
     }
     catch
     {
@@ -4071,9 +4072,12 @@ const GekanatorPage: FC<{ user: User | null }> = ({ user }) => {
     return reviewGuessedPostId === reviewCorrectPostId
   }) ()
   const effectiveBackgroundMotionMode = (() => {
+    if (animationMode === 'off')
+      return 'off'
+
     if (backgroundMotionMode === 'off')
       return 'off'
-    if (prefersReducedMotion)
+    if (animationMode === 'reduced' || prefersReducedMotion)
       return 'calm'
 
     return backgroundMotionMode

frontend/src/pages/materials/MaterialHistoryPage.tsx

@@ -9,14 +9,18 @@ import PageTitle from '@/components/common/PageTitle'
 import Pagination from '@/components/common/Pagination'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
+import { clientScrollBehaviour } from '@/lib/clientAnimation'
 import { fetchMaterialChanges } from '@/lib/materials'
 import { materialsKeys } from '@/lib/queryKeys'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { dateString, inputClass } from '@/lib/utils'
 
 import type { FC, FormEvent } from 'react'
 
 
 const MaterialHistoryPage: FC = () => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const location = useLocation ()
   const navigate = useNavigate ()
   const query = new URLSearchParams (location.search)
@@ -55,8 +59,9 @@ const MaterialHistoryPage: FC = () => {
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
   useEffect (() => {
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search])
 
   const handleSearch = (event: FormEvent) => {
     event.preventDefault ()

frontend/src/pages/materials/MaterialNewPage.tsx

@@ -79,7 +79,7 @@ const MaterialNewPage: FC = () => {
 	  <FieldError messages={baseErrors}/>
 
 	  {/* タグ */}
-	  <FormField label="タグ" messages={fieldErrors.tag}>
+	   <FormField label="タグ" messages={fieldErrors.tag}>
 	    {({ describedBy, invalid }) => (
 		<TagInput
 		    describedBy={describedBy}

frontend/src/pages/posts/PostDetailPage.tsx

@@ -15,6 +15,7 @@ import { SITE_TITLE } from '@/config'
 import { isApiError } from '@/lib/api'
 import { fetchPost, toggleViewedFlg } from '@/lib/posts'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { canEditContent } from '@/lib/users'
 import { cn } from '@/lib/utils'
 import NotFound from '@/pages/NotFound'
@@ -29,7 +30,17 @@ type Props = { user: User | null }
 
 const PostDetailPage: FC<Props> = ({ user }) => {
   const editable = canEditContent (user)
+  const behaviourSettings = useClientBehaviourSettings ()
+  const thumbnailMode = behaviourSettings.thumbnailMode ?? 'normal'
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const { id } = useParams ()
+  const heroLayoutId = animationMode === 'off' ? undefined : `page-${ id }`
+  const heroTransition =
+      animationMode === 'off'
+      ? { duration: 0 }
+      : animationMode === 'reduced'
+	? { duration: .08, ease: 'linear' as const }
+	: { duration: .2, ease: 'easeOut' as const }
   const postId = String (id ?? '')
   const postKey = postsKeys.show (postId)
 
@@ -134,17 +145,19 @@ const PostDetailPage: FC<Props> = ({ user }) => {
 		      </div>)
 		})}
 
-		{(post.thumbnail || post.thumbnailBase) && (
+		{thumbnailMode !== 'off' && (post.thumbnail || post.thumbnailBase) && (
 		    <motion.div
-			layoutId={`page-${ id }`}
+			layoutId={heroLayoutId}
 			className="absolute top-4 left-4 w-[min(640px,calc(100vw-2rem))] h-[360px]
 				   overflow-hidden rounded-xl pointer-events-none z-50"
 			initial={{ opacity: 1 }}
 			animate={{ opacity: 0 }}
-			transition={{ duration: .2, ease: 'easeOut' }}>
+			transition={heroTransition}>
 		      <img src={post.thumbnail || post.thumbnailBase || undefined}
 			   alt={post.title || post.url}
 			   title={post.title || post.url || undefined}
+			   loading={thumbnailMode === 'light' ? 'lazy' : 'eager'}
+			   decoding="async"
 			   className="object-cover w-full h-full"/>
 		    </motion.div>)}
 

frontend/src/pages/posts/PostHistoryPage.tsx

@@ -12,9 +12,12 @@ import { useDialogue } from '@/components/dialogues/DialogueProvider'
 import MainArea from '@/components/layout/MainArea'
 import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
+import { clientAnimationTransition,
+	 clientScrollBehaviour } from '@/lib/clientAnimation'
 import { fetchPostChanges, updatePost } from '@/lib/posts'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
 import { fetchTag } from '@/lib/tags'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn, dateString, originalCreatedAtString } from '@/lib/utils'
 
 import type { FC, MouseEvent } from 'react'
@@ -37,6 +40,12 @@ const renderDiff = (diff: { current: string | null; prev: string | null }) => (
 
 const PostHistoryPage: FC = () => {
   const dialogue = useDialogue ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )
 
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
@@ -113,8 +122,9 @@ const PostHistoryPage: FC = () => {
   }
 
   useEffect (() => {
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search])
 
   const layoutIds: string[] = []
 
@@ -198,8 +208,8 @@ const PostHistoryPage: FC = () => {
 				    rowSpan={rowsCnt}>
 				  <PrefetchLink to={`/posts/${ change.postId }`}>
 				    <motion.div
-					layoutId={layoutId}
-					transition={{ layout: { duration: .2, ease: 'easeOut' } }}>
+					layoutId={animationMode === 'off' ? undefined : layoutId}
+					transition={{ layout: layoutTransition }}>
 				      <img src={change.thumbnail.current
 						|| change.thumbnailBase.current
 						|| undefined}

frontend/src/pages/posts/PostListPage.test.tsx

@@ -1,9 +1,10 @@
 import { fireEvent, screen, waitFor } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
 
 import PostListPage from '@/pages/posts/PostListPage'
 import { buildPost, buildTag, buildWikiPage } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
+import { CLIENT_SETTINGS_STORAGE_KEY } from '@/lib/settings'
 
 const postsApi = vi.hoisted (() => ({
   fetchPosts: vi.fn (),
@@ -18,6 +19,11 @@ vi.mock ('@/lib/posts', () => postsApi)
 vi.mock ('@/lib/wiki', () => wikiApi)
 
 describe ('PostListPage', () => {
+  beforeEach (() => {
+    localStorage.clear ()
+    vi.clearAllMocks ()
+  })
+
   it ('loads posts from the current query and renders the plaza tab', async () => {
     const tag = buildTag ({ name: '虹夏' })
     postsApi.fetchPosts.mockResolvedValueOnce ({
@@ -36,6 +42,7 @@ describe ('PostListPage', () => {
             match: 'all',
             page:  2,
             limit: 20,
+            order: 'original_created_at:desc',
           }),
       )
     })
@@ -71,4 +78,36 @@ describe ('PostListPage', () => {
         '/wiki/%E8%99%B9%E5%A4%8F',
     )
   })
+
+  it ('uses stored list limit but keeps the fixed plaza order', async () => {
+    localStorage.setItem (
+        CLIENT_SETTINGS_STORAGE_KEY,
+        JSON.stringify ({ lists: { postList: { limit: 50, order: 'title:asc' } } }))
+    postsApi.fetchPosts.mockResolvedValueOnce ({ posts: [], count: 0 })
+
+    renderWithProviders (<PostListPage/>, { route: '/posts' })
+
+    await waitFor (() => {
+      expect (postsApi.fetchPosts).toHaveBeenCalledWith (
+          expect.objectContaining ({
+            limit: 50,
+            order: 'original_created_at:desc',
+          }),
+      )
+    })
+  })
+
+  it ('updates the limit from the tab right addon and resets to page 1', async () => {
+    postsApi.fetchPosts.mockResolvedValue ({ posts: [], count: 0 })
+
+    renderWithProviders (<PostListPage/>, { route: '/posts?page=3' })
+
+    fireEvent.change (await screen.findByLabelText ('件数'), { target: { value: '100' } })
+
+    await waitFor (() => {
+      expect (postsApi.fetchPosts).toHaveBeenLastCalledWith (
+          expect.objectContaining ({ page: 1, limit: 100 }),
+      )
+    })
+  })
 })

frontend/src/pages/posts/PostListPage.tsx

@@ -1,7 +1,7 @@
 import { useQuery } from '@tanstack/react-query'
-import { useLayoutEffect, useMemo, useRef, useState } from 'react'
+import { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react'
 import { Helmet } from 'react-helmet-async'
-import { useLocation } from 'react-router-dom'
+import { useLocation, useNavigate } from 'react-router-dom'
 
 import PostList from '@/components/PostList'
 import PrefetchLink from '@/components/PrefetchLink'
@@ -13,12 +13,24 @@ import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
 import { fetchPosts } from '@/lib/posts'
 import { postsKeys } from '@/lib/queryKeys'
+import {
+    DEFAULT_POST_LIST_LIMIT,
+    getClientListLimit,
+    LIST_LIMIT_OPTIONS,
+    setClientListSettings,
+} from '@/lib/settings'
+import { useKeyboardShortcuts } from '@/lib/useKeyboardShortcuts'
 import { fetchWikiPageByTitle } from '@/lib/wiki'
 
 import type { FC } from 'react'
 
 import type { WikiPage } from '@/types'
 
+const parseLimit = (value: string | null): 20 | 50 | 100 | null => {
+  const n = Number (value)
+  return n === 20 || n === 50 || n === 100 ? n : null
+}
+
 
 const PostListPage: FC = () => {
   const containerRef = useRef<HTMLDivElement | null> (null)
@@ -26,6 +38,7 @@ const PostListPage: FC = () => {
   const [wikiPage, setWikiPage] = useState<WikiPage | null> (null)
 
   const location = useLocation ()
+  const navigate = useNavigate ()
   const query = new URLSearchParams (location.search)
   const tagsQuery = query.get ('tags') ?? ''
   const anyFlg = query.get ('match') === 'any'
@@ -33,13 +46,18 @@ const PostListPage: FC = () => {
   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)
+  const limit = (
+      parseLimit (query.get ('limit'))
+      ?? getClientListLimit ('postList')
+      ?? DEFAULT_POST_LIST_LIMIT
+  )
+  const order = 'original_created_at:desc' as const
 
   const keys = {
       tags: tagsKey, match, page, limit,
       url: '', title: '', originalCreatedFrom: '', originalCreatedTo: '',
       createdFrom: '', createdTo: '', updatedFrom: '', updatedTo: '',
-      order: 'original_created_at:desc' } as const
+      order } as const
   const { data, isLoading: loading } = useQuery ({
       queryKey: postsKeys.index (keys),
       queryFn:  () => fetchPosts (keys) })
@@ -47,6 +65,40 @@ const PostListPage: FC = () => {
   const cursor = ''
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
+  useEffect (() => {
+    setClientListSettings ('postList', { limit })
+  }, [limit])
+
+  const updatePage = (nextPage: number) => {
+    const params = new URLSearchParams (location.search)
+    params.set ('page', String (Math.max (1, nextPage)))
+    navigate (`${ location.pathname }?${ params.toString () }`)
+  }
+
+  const updateListQuery = (next: { limit?: 20 | 50 | 100 }) => {
+    const params = new URLSearchParams (location.search)
+    params.set ('limit', String (next.limit ?? limit))
+    params.set ('page', '1')
+    navigate (`${ location.pathname }?${ params.toString () }`)
+  }
+
+  useKeyboardShortcuts (useMemo (() => ({
+      ...(page > 1
+	  ? {
+	      'pagination.previous': () => {
+		  updatePage (page - 1)
+	      },
+	  }
+	  : { }),
+      ...(totalPages > 0 && page < totalPages
+	  ? {
+	      'pagination.next': () => {
+		  updatePage (Math.min (page + 1, totalPages))
+	      },
+	  }
+	  : { }),
+  }), [page, totalPages, location.search]))
+
   useLayoutEffect (() => {
     scroll (0, 0)
 
@@ -90,7 +142,24 @@ const PostListPage: FC = () => {
 	}}/>
 
 	<MainArea>
-	  <TabGroup>
+	  <TabGroup
+	      rightAddon={
+		  <label className="flex items-center gap-2 text-xs text-muted-foreground">
+		    <span>件数</span>
+		    <select
+			className="rounded border border-border bg-background px-2 py-1 text-sm
+				   text-foreground"
+			value={limit}
+			onChange={ev => updateListQuery ({
+			    limit: Number (ev.target.value) as 20 | 50 | 100,
+			})}>
+		      {LIST_LIMIT_OPTIONS.map (value => (
+			  <option key={value} value={value}>
+			    {value}
+			  </option>))}
+		    </select>
+		  </label>
+	      }>
 	    <Tab name="広場">
 	      {posts.length > 0
 	       ? (

frontend/src/pages/posts/PostNewPage.test.tsx

@@ -30,16 +30,12 @@ describe ('PostNewPage', () => {
     expect (screen.getByText ('403')).toBeInTheDocument ()
   })
 
-  it ('submits a new post with manual title and thumbnail settings', async () => {
+  it ('submits a new post with manual title and thumbnail fetch UI', async () => {
     api.apiPost.mockResolvedValueOnce ({})
     api.apiGet.mockResolvedValue ([])
 
     renderWithProviders (<PostNewPage user={buildUser ({ role: 'member' })}/>)
 
-    const checkboxes = screen.getAllByRole ('checkbox', { name: '自動' })
-    fireEvent.click (checkboxes[0])
-    fireEvent.click (checkboxes[1])
-
     const textboxes = screen.getAllByRole ('textbox')
     fireEvent.change (textboxes[0], { target: { value: 'https://example.com/post' } })
     fireEvent.change (textboxes[1], { target: { value: '投稿タイトル' } })
@@ -97,10 +93,6 @@ describe ('PostNewPage', () => {
 
     renderWithProviders (<PostNewPage user={buildUser ({ role: 'member' })}/>)
 
-    const checkboxes = screen.getAllByRole ('checkbox', { name: '自動' })
-    fireEvent.click (checkboxes[0])
-    fireEvent.click (checkboxes[1])
-
     const textboxes = screen.getAllByRole ('textbox')
     fireEvent.change (textboxes[0], { target: { value: 'https://example.com/post' } })
     fireEvent.change (textboxes[1], { target: { value: '投稿タイトル' } })

frontend/src/pages/posts/PostNewPage.tsx

@@ -41,16 +41,13 @@ const PostNewPage: FC<Props> = ({ user }) => {
   const [parentPostIds, setParentPostIds] = useState ('')
   const [tags, setTags] = useState ('')
   const [duration, setDuration] = useState ('')
-  const [thumbnailAutoFlg, setThumbnailAutoFlg] = useState (true)
   const [thumbnailFile, setThumbnailFile] = useState<File | null> (null)
   const [thumbnailLoading, setThumbnailLoading] = useState (false)
   const [thumbnailPreview, setThumbnailPreview] = useState<string> ('')
   const [title, setTitle] = useState ('')
-  const [titleAutoFlg, setTitleAutoFlg] = useState (true)
   const [titleLoading, setTitleLoading] = useState (false)
   const [url, setURL] = useState ('')
 
-  const previousURLRef = useRef ('')
   const thumbnailPreviewRef = useRef ('')
   const videoFlg =
       useMemo (() => tags.split (/\s+/).some (tag => tag.replace (/\[.*\]$/, '') === '動画'),
@@ -86,23 +83,17 @@ const PostNewPage: FC<Props> = ({ user }) => {
     }
   }
 
-  const handleURLBlur = () => {
-    if (!(url) || url === previousURLRef.current)
-      return
-
-    if (titleAutoFlg)
-      fetchTitle ()
-    if (thumbnailAutoFlg)
-      fetchThumbnail ()
-    previousURLRef.current = url
-  }
-
   const fetchTitle = useCallback (async () => {
-    setTitle ('')
     setTitleLoading (true)
-    const data = await apiGet<{ title: string }> ('/preview/title', { params: { url } })
-    setTitle (data.title || '')
-    setTitleLoading (false)
+    try
+    {
+      const data = await apiGet<{ title: string }> ('/preview/title', { params: { url } })
+      setTitle (data.title || '')
+    }
+    finally
+    {
+      setTitleLoading (false)
+    }
   }, [url])
 
   const fetchThumbnail = useCallback (async () => {
@@ -111,30 +102,26 @@ const PostNewPage: FC<Props> = ({ user }) => {
     setThumbnailLoading (true)
     if (thumbnailPreviewRef.current)
       URL.revokeObjectURL (thumbnailPreviewRef.current)
-    const data = await apiGet<Blob> ('/preview/thumbnail',
-				     { params: { url }, responseType: 'blob' })
-    const imageURL = URL.createObjectURL (data)
-    setThumbnailPreview (imageURL)
-    setThumbnailFile (new File ([data],
-				'thumbnail.png',
-				{ type: data.type || 'image/png' }))
-    setThumbnailLoading (false)
+    try
+    {
+      const data = await apiGet<Blob> ('/preview/thumbnail',
+				       { params: { url }, responseType: 'blob' })
+      const imageURL = URL.createObjectURL (data)
+      setThumbnailPreview (imageURL)
+      setThumbnailFile (new File ([data],
+				  'thumbnail.png',
+				  { type: data.type || 'image/png' }))
+    }
+    finally
+    {
+      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/>
 
@@ -156,59 +143,62 @@ const PostNewPage: FC<Props> = ({ user }) => {
 		       onChange={e => setURL (e.target.value)}
 		       aria-describedby={describedBy}
 		       aria-invalid={invalid}
-		       className={inputClass (invalid)}
-		       onBlur={handleURLBlur}/>)}
+		       className={inputClass (invalid)}/>)}
 	  </FormField>
 
 	  {/* タイトル */}
-	  <FormField
-	      checkBox={{
-		  label:    '自動',
-		  checked:  titleAutoFlg,
-		  onChange: ev => setTitleAutoFlg (ev.target.checked)}}
-	      label="タイトル"
-	      messages={fieldErrors.title}>
+	  <FormField label="タイトル" messages={fieldErrors.title}>
 	    {({ describedBy, invalid }) => (
-		<input type="text"
-		       aria-describedby={describedBy}
-		       aria-invalid={invalid}
-		       className={inputClass (invalid)}
-		       value={title}
-		       placeholder={titleLoading ? 'Loading...' : ''}
-		       onChange={ev => setTitle (ev.target.value)}
-		       disabled={titleAutoFlg}/>)}
+		<div className="space-y-2">
+		  <input type="text"
+			 aria-describedby={describedBy}
+			 aria-invalid={invalid}
+			 className={inputClass (invalid)}
+			 value={title}
+			 placeholder={titleLoading ? 'Loading...' : ''}
+			 onChange={ev => setTitle (ev.target.value)}
+			 disabled={titleLoading}/>
+		  <div className="flex flex-wrap items-center gap-2 text-sm">
+		    <span>必要なタイミングで URL から取得できます．</span>
+		    <Button
+			type="button"
+			variant="outline"
+			onClick={() => void fetchTitle ()}
+			disabled={!(url) || titleLoading}>
+		      取得
+		    </Button>
+		  </div>
+		</div>)}
 	  </FormField>
 
 	  {/* サムネール */}
-	  <FormField
-	      checkBox={{
-		  label:    '自動',
-		  checked:  thumbnailAutoFlg,
-		  onChange: ev => setThumbnailAutoFlg (ev.target.checked)}}
-	      label="サムネール"
-	      messages={fieldErrors.thumbnail}>
+	  <FormField label="サムネール" messages={fieldErrors.thumbnail}>
 	    {({ describedBy, invalid }) => (
 		<>
-		  {thumbnailAutoFlg
-		   ? (thumbnailLoading
-		      ? <p className="text-gray-500 text-sm">Loading...</p>
-		      : !(thumbnailPreview) && (
-			  <p className="text-gray-500 text-sm">
-			    URL から自動取得されます。
-			  </p>))
-		   : (
-		      <input type="file"
-			     accept="image/*"
-			     aria-describedby={describedBy}
-			     aria-invalid={invalid}
-			     onChange={e => {
-			       const file = e.target.files?.[0]
-			       if (file)
-				 {
-				   setThumbnailFile (file)
-				   setThumbnailPreview (URL.createObjectURL (file))
-				 }
-			     }}/>)}
+		  <div className="mb-2 flex flex-wrap items-center gap-2 text-sm">
+		    <span>必要なタイミングで URL から取得できます．</span>
+		    <Button
+			type="button"
+			variant="outline"
+			onClick={() => void fetchThumbnail ()}
+			disabled={!(url) || thumbnailLoading}>
+		      取得
+		    </Button>
+		  </div>
+		  {thumbnailLoading && (
+		      <p className="text-gray-500 text-sm">Loading...</p>)}
+		  <input type="file"
+			 accept="image/*"
+			 aria-describedby={describedBy}
+			 aria-invalid={invalid}
+			 onChange={e => {
+			   const file = e.target.files?.[0]
+			   if (file)
+			     {
+			       setThumbnailFile (file)
+			       setThumbnailPreview (URL.createObjectURL (file))
+			     }
+			 }}/>
 		  {thumbnailPreview && (
 		      <img src={thumbnailPreview}
 			   alt="preview"

frontend/src/pages/posts/PostSearchPage.test.tsx

@@ -4,6 +4,7 @@ import { beforeEach, describe, expect, it, vi } from 'vitest'
 import PostSearchPage from '@/pages/posts/PostSearchPage'
 import { buildPost, buildTag } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
+import { CLIENT_SETTINGS_STORAGE_KEY } from '@/lib/settings'
 
 const postsApi = vi.hoisted (() => ({
   fetchPosts: vi.fn (),
@@ -18,6 +19,7 @@ vi.mock ('@/lib/api', () => api)
 
 describe ('PostSearchPage', () => {
   beforeEach (() => {
+    localStorage.clear ()
     vi.clearAllMocks ()
     api.apiGet.mockResolvedValue ([])
   })
@@ -40,6 +42,7 @@ describe ('PostSearchPage', () => {
             tags:  'x',
             match: 'any',
             page:  2,
+            limit: 20,
           }),
       )
     })
@@ -81,4 +84,41 @@ describe ('PostSearchPage', () => {
 
     expect (await screen.findByText ('結果ないよ（笑）')).toBeInTheDocument ()
   })
+
+  it ('uses URL limit before localStorage and stores the active list settings', async () => {
+    localStorage.setItem (
+        CLIENT_SETTINGS_STORAGE_KEY,
+        JSON.stringify ({ lists: { postSearch: { limit: 100, order: 'title:asc' } } }))
+    postsApi.fetchPosts.mockResolvedValueOnce ({ posts: [], count: 0 })
+
+    renderWithProviders (
+        <PostSearchPage/>,
+        { route: '/posts/search?limit=50&order=created_at%3Adesc' },
+    )
+
+    await waitFor (() => {
+      expect (postsApi.fetchPosts).toHaveBeenCalledWith (
+          expect.objectContaining ({ limit: 50, order: 'created_at:desc' }),
+      )
+    })
+    expect (JSON.parse (localStorage.getItem (CLIENT_SETTINGS_STORAGE_KEY) ?? '{}'))
+        .toMatchObject ({ lists: { postSearch: { limit: 50, order: 'created_at:desc' } } })
+  })
+
+  it ('moves the compact limit control outside the search form and resets page on change', async () => {
+    postsApi.fetchPosts.mockResolvedValue ({ posts: [], count: 0 })
+
+    renderWithProviders (<PostSearchPage/>, { route: '/posts/search?page=4' })
+
+    const limitSelect = await screen.findByLabelText ('件数')
+    expect (limitSelect.closest ('form')).toBeNull ()
+
+    fireEvent.change (limitSelect, { target: { value: '100' } })
+
+    await waitFor (() => {
+      expect (postsApi.fetchPosts).toHaveBeenLastCalledWith (
+          expect.objectContaining ({ page: 1, limit: 100 }),
+      )
+    })
+  })
 })

frontend/src/pages/posts/PostSearchPage.tsx

@@ -14,8 +14,20 @@ import Pagination from '@/components/common/Pagination'
 import TagInput from '@/components/common/TagInput'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
+import { clientAnimationTransition,
+	 clientScrollBehaviour } from '@/lib/clientAnimation'
 import { fetchPosts } from '@/lib/posts'
 import { postsKeys } from '@/lib/queryKeys'
+import {
+    DEFAULT_POST_LIST_LIMIT,
+    DEFAULT_POST_LIST_ORDER,
+    getClientListLimit,
+    getClientListOrder,
+    LIST_LIMIT_OPTIONS,
+    setClientListSettings,
+} from '@/lib/settings'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
+import { useKeyboardShortcuts } from '@/lib/useKeyboardShortcuts'
 import { dateString, inputClass, originalCreatedAtString } from '@/lib/utils'
 
 import type { FC, FormEvent } from 'react'
@@ -31,8 +43,40 @@ const setIf = (qs: URLSearchParams, k: string, v: string | null) => {
     qs.set (k, t)
 }
 
+const parseLimit = (value: string | null): 20 | 50 | 100 | null => {
+  const n = Number (value)
+  return n === 20 || n === 50 || n === 100 ? n : null
+}
+
+const parseOrder = (value: string | null): FetchPostsOrder | null => {
+  switch (value)
+  {
+  case 'title:asc':
+  case 'title:desc':
+  case 'url:asc':
+  case 'url:desc':
+  case 'original_created_at:asc':
+  case 'original_created_at:desc':
+  case 'created_at:asc':
+  case 'created_at:desc':
+  case 'updated_at:asc':
+  case 'updated_at:desc':
+    return value
+
+  default:
+    return null
+  }
+}
+
 
 const PostSearchPage: FC = () => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const thumbnailTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { type: 'spring', stiffness: 500, damping: 40, mass: .5 },
+	reduced: { duration: .08, ease: 'linear' as const } },
+  )
   const location = useLocation ()
 
   const navigate = useNavigate ()
@@ -41,7 +85,11 @@ const PostSearchPage: FC = () => {
 			 [location.search])
 
   const page = Number (query.get ('page') ?? 1)
-  const limit = Number (query.get ('limit') ?? 20)
+  const limit = (
+      parseLimit (query.get ('limit'))
+      ?? getClientListLimit ('postSearch')
+      ?? DEFAULT_POST_LIST_LIMIT
+  )
 
   const qURL = query.get ('url') ?? ''
   const qTitle = query.get ('title') ?? ''
@@ -53,7 +101,11 @@ const PostSearchPage: FC = () => {
   const qCreatedTo = query.get ('created_to') ?? ''
   const qUpdatedFrom = query.get ('updated_from') ?? ''
   const qUpdatedTo = query.get ('updated_to') ?? ''
-  const order = (query.get ('order') || 'original_created_at:desc') as FetchPostsOrder
+  const order = (
+      parseOrder (query.get ('order'))
+      ?? getClientListOrder<FetchPostsOrder> ('postSearch')
+      ?? DEFAULT_POST_LIST_ORDER
+  )
 
   const [createdFrom, setCreatedFrom] = useState<string | null> (null)
   const [createdTo, setCreatedTo] = useState<string | null> (null)
@@ -83,6 +135,10 @@ const PostSearchPage: FC = () => {
   const results = data?.posts ?? []
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
+  useEffect (() => {
+    setClientListSettings ('postSearch', { limit, order })
+  }, [limit, order])
+
   useEffect (() => {
     setURL (qURL ?? '')
     setTitle (qTitle ?? '')
@@ -95,9 +151,11 @@ const PostSearchPage: FC = () => {
     setUpdatedFrom (qUpdatedFrom)
     setUpdatedTo (qUpdatedTo)
 
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search, qCreatedFrom, qCreatedTo, qMatch, qOriginalCreatedFrom,
-      qOriginalCreatedTo, qTags, qTitle, qUpdatedFrom, qUpdatedTo, qURL])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search, qCreatedFrom, qCreatedTo, qMatch,
+      qOriginalCreatedFrom, qOriginalCreatedTo, qTags, qTitle, qUpdatedFrom,
+      qUpdatedTo, qURL])
 
   const search = async () => {
     const qs = new URLSearchParams ()
@@ -113,6 +171,22 @@ const PostSearchPage: FC = () => {
     qs.set ('match', matchType)
     qs.set ('page', '1')
     qs.set ('order', order)
+    qs.set ('limit', String (limit))
+    navigate (`${ location.pathname }?${ qs.toString () }`)
+  }
+
+  const updateListQuery = (next: { limit?: 20 | 50 | 100
+				   order?: FetchPostsOrder }) => {
+    const qs = new URLSearchParams (location.search)
+    qs.set ('limit', String (next.limit ?? limit))
+    qs.set ('order', next.order ?? order)
+    qs.set ('page', '1')
+    navigate (`${ location.pathname }?${ qs.toString () }`)
+  }
+
+  const updatePage = (nextPage: number) => {
+    const qs = new URLSearchParams (location.search)
+    qs.set ('page', String (Math.max (1, nextPage)))
     navigate (`${ location.pathname }?${ qs.toString () }`)
   }
 
@@ -121,6 +195,23 @@ const PostSearchPage: FC = () => {
     search ()
   }
 
+  useKeyboardShortcuts (useMemo (() => ({
+      ...(page > 1
+	  ? {
+	      'pagination.previous': () => {
+		  updatePage (page - 1)
+	      },
+	  }
+	  : { }),
+      ...(totalPages > 0 && page < totalPages
+	  ? {
+	      'pagination.next': () => {
+		  updatePage (Math.min (page + 1, totalPages))
+	      },
+	  }
+	  : { }),
+  }), [page, totalPages, location.search]))
+
   const defaultDirection = { title: 'asc',
 			     url: 'asc',
 			     original_created_at: 'desc',
@@ -134,7 +225,24 @@ const PostSearchPage: FC = () => {
 	</Helmet>
 
 	<div className="max-w-xl">
-	  <PageTitle>広場検索</PageTitle>
+	  <div className="flex flex-wrap items-center justify-between gap-3">
+	    <PageTitle>広場検索</PageTitle>
+	    <label className="flex items-center gap-2 text-xs text-muted-foreground">
+	      <span>件数</span>
+	      <select
+		  className="rounded border border-border bg-background px-2 py-1 text-sm
+			     text-foreground"
+		  value={limit}
+		  onChange={ev => updateListQuery ({
+		      limit: Number (ev.target.value) as 20 | 50 | 100,
+		  })}>
+		{LIST_LIMIT_OPTIONS.map (value => (
+		    <option key={value} value={value}>
+		      {value}
+		    </option>))}
+	      </select>
+	    </label>
+	  </div>
 
 	  <form onSubmit={handleSearch} className="space-y-2">
 	    {/* タイトル */}
@@ -142,6 +250,7 @@ const PostSearchPage: FC = () => {
 	      {({ invalid }) => (
 		  <input
 		      type="text"
+		      data-shortcut-focus-search="true"
 		      value={title}
 		      onChange={e => setTitle (e.target.value)}
 		      className={inputClass (invalid)}/>)}
@@ -161,6 +270,7 @@ const PostSearchPage: FC = () => {
 	    <FormField label="タグ">
 	      {() => (
 		  <TagInput
+		      includeNico={true}
 		      value={tagsStr}
 		      setValue={setTagsStr}/>)}
 	    </FormField>
@@ -296,15 +406,16 @@ const PostSearchPage: FC = () => {
 		  </thead>
 		  <tbody>
 		    {results.map (row => (
-			<tr key={row.id} className="even:bg-gray-100 dark:even:bg-gray-700">
+			<tr
+			    key={row.id}
+			    className="even:bg-gray-100 dark:even:bg-gray-700">
 			  <td className="p-2">
 			    <PrefetchLink to={`/posts/${ row.id }`} title={row.title || undefined}>
 			      <motion.div
-				  layoutId={`page-${ row.id }`}
-				  transition={{ type: 'spring',
-						stiffness: 500,
-						damping: 40,
-						mass: .5 }}>
+				  layoutId={animationMode === 'off'
+				      ? undefined
+				      : `page-${ row.id }`}
+				  transition={thumbnailTransition}>
 				<img src={row.thumbnail || row.thumbnailBase || undefined}
 				     alt={row.title || row.url}
 				     title={row.title || row.url || undefined}

frontend/src/pages/tags/NicoTagListPage.test.tsx

@@ -6,6 +6,7 @@ import { dateString } from '@/lib/utils'
 import { buildTag, buildUser } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
 
+import type { ReactNode } from 'react'
 import type { NicoTag } from '@/types'
 
 const api = vi.hoisted (() => ({
@@ -27,6 +28,7 @@ const scrollIntoView = vi.fn ()
 vi.mock ('@/lib/api', () => api)
 vi.mock ('@/components/ui/use-toast', () => toastApi)
 vi.mock ('@/components/dialogues/DialogueProvider', () => ({
+  default: ({ children }: { children: ReactNode }) => <>{children}</>,
   useDialogue: () => dialogue,
 }))
 

frontend/src/pages/tags/NicoTagListPage.tsx

@@ -17,8 +17,10 @@ import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
 import { apiPut } from '@/lib/api'
 import { extractValidationError } from '@/lib/apiErrors'
+import { clientScrollBehaviour } from '@/lib/clientAnimation'
 import { tagsKeys } from '@/lib/queryKeys'
 import { fetchNicoTags } from '@/lib/tags'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn, dateString, inputClass } from '@/lib/utils'
 import { canEditContent } from '@/lib/users'
 
@@ -38,6 +40,8 @@ const setIf = (qs: URLSearchParams, key: string, value: string) => {
 
 
 const NicoTagListPage: FC<Props> = ({ user }) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const dialogue = useDialogue ()
   const location = useLocation ()
   const navigate = useNavigate ()
@@ -152,8 +156,9 @@ const NicoTagListPage: FC<Props> = ({ user }) => {
     setLinkStatus (qLinkStatus)
     setEditingId (null)
 
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search, qLinkedTag, qLinkStatus, qName])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search, qLinkedTag, qLinkStatus, qName])
 
   useEffect (() => {
     if (!(data))

frontend/src/pages/tags/TagHistoryPage.tsx

@@ -11,8 +11,10 @@ import { toast } from '@/components/ui/use-toast'
 import { SITE_TITLE } from '@/config'
 import { CATEGORY_NAMES } from '@/consts'
 import { apiPut } from '@/lib/api'
+import { clientScrollBehaviour } from '@/lib/clientAnimation'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
 import { fetchTagChanges } from '@/lib/tags'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn, dateString } from '@/lib/utils'
 
 import type { FC } from 'react'
@@ -43,6 +45,8 @@ const renderStateDiff = (diff: { current: string | null; prev: string | null })
 
 
 const TagHistoryPage: FC = () => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const location = useLocation ()
   const query = new URLSearchParams (location.search)
   const id = query.get ('id')
@@ -58,8 +62,9 @@ const TagHistoryPage: FC = () => {
   const qc = useQueryClient ()
 
   useEffect (() => {
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search])
 
   return (
       <MainArea>

frontend/src/pages/tags/TagListPage.test.tsx

@@ -1,9 +1,10 @@
 import { fireEvent, screen, waitFor } from '@testing-library/react'
-import { describe, expect, it, vi } from 'vitest'
+import { beforeEach, describe, expect, it, vi } from 'vitest'
 
 import TagListPage from '@/pages/tags/TagListPage'
 import { buildTag } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
+import { CLIENT_SETTINGS_STORAGE_KEY } from '@/lib/settings'
 
 const tagsApi = vi.hoisted (() => ({
   fetchTags: vi.fn (),
@@ -12,6 +13,11 @@ const tagsApi = vi.hoisted (() => ({
 vi.mock ('@/lib/tags', () => tagsApi)
 
 describe ('TagListPage', () => {
+  beforeEach (() => {
+    localStorage.clear ()
+    vi.clearAllMocks ()
+  })
+
   it ('loads tags from URL filters and renders the results table', async () => {
     tagsApi.fetchTags.mockResolvedValueOnce ({
       tags: [buildTag ({
@@ -38,6 +44,8 @@ describe ('TagListPage', () => {
             name:         '虹',
             category:     'character',
             page:         3,
+            limit:        20,
+            order:        'post_count:desc',
             postCountGTE: 5,
             deprecated:   true,
           }),
@@ -48,7 +56,7 @@ describe ('TagListPage', () => {
         '/tags/7',
     )
     expect (screen.getAllByText ('キャラクター').length).toBeGreaterThan (0)
-    expect (screen.getAllByRole ('combobox')[1]).toHaveValue ('1')
+    expect (screen.getAllByRole ('combobox')[2]).toHaveValue ('1')
     expect (screen.getAllByText ('廃止')).toHaveLength (2)
   })
 
@@ -58,7 +66,7 @@ describe ('TagListPage', () => {
     renderWithProviders (<TagListPage/>, { route: '/tags' })
 
     fireEvent.change (screen.getByRole ('textbox'), { target: { value: '虹夏' } })
-    fireEvent.change (screen.getAllByRole ('combobox')[0], {
+    fireEvent.change (screen.getAllByRole ('combobox')[1], {
       target: { value: 'character' },
     })
     fireEvent.submit (screen.getByRole ('button', { name: '検索' }).closest ('form')!)
@@ -82,4 +90,41 @@ describe ('TagListPage', () => {
 
     expect (await screen.findByText ('結果ないよ（笑）')).toBeInTheDocument ()
   })
+
+  it ('uses URL limit before localStorage and preserves the query order', async () => {
+    localStorage.setItem (
+        CLIENT_SETTINGS_STORAGE_KEY,
+        JSON.stringify ({ lists: { tagList: { limit: 100, order: 'name:asc' } } }))
+    tagsApi.fetchTags.mockResolvedValueOnce ({ tags: [], count: 0 })
+
+    renderWithProviders (
+        <TagListPage/>,
+        { route: '/tags?limit=50&order=updated_at%3Adesc' },
+    )
+
+    await waitFor (() => {
+      expect (tagsApi.fetchTags).toHaveBeenCalledWith (
+          expect.objectContaining ({ limit: 50, order: 'updated_at:desc' }),
+      )
+    })
+    expect (JSON.parse (localStorage.getItem (CLIENT_SETTINGS_STORAGE_KEY) ?? '{}'))
+        .toMatchObject ({ lists: { tagList: { limit: 50, order: 'updated_at:desc' } } })
+  })
+
+  it ('keeps the compact limit control outside the search form and resets page on change', async () => {
+    tagsApi.fetchTags.mockResolvedValue ({ tags: [], count: 0 })
+
+    renderWithProviders (<TagListPage/>, { route: '/tags?page=4' })
+
+    const limitSelect = await screen.findByLabelText ('件数')
+    expect (limitSelect.closest ('form')).toBeNull ()
+
+    fireEvent.change (limitSelect, { target: { value: '100' } })
+
+    await waitFor (() => {
+      expect (tagsApi.fetchTags).toHaveBeenLastCalledWith (
+          expect.objectContaining ({ page: 1, limit: 100 }),
+      )
+    })
+  })
 })

frontend/src/pages/tags/TagListPage.tsx

@@ -13,7 +13,18 @@ import Pagination from '@/components/common/Pagination'
 import MainArea from '@/components/layout/MainArea'
 import { SITE_TITLE } from '@/config'
 import { CATEGORIES, CATEGORY_NAMES } from '@/consts'
+import { clientScrollBehaviour } from '@/lib/clientAnimation'
 import { tagsKeys } from '@/lib/queryKeys'
+import {
+    DEFAULT_POST_LIST_LIMIT,
+    DEFAULT_TAG_LIST_ORDER,
+    getClientListLimit,
+    getClientListOrder,
+    LIST_LIMIT_OPTIONS,
+    setClientListSettings,
+} from '@/lib/settings'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
+import { useKeyboardShortcuts } from '@/lib/useKeyboardShortcuts'
 import { fetchTags } from '@/lib/tags'
 import { dateString, inputClass } from '@/lib/utils'
 
@@ -35,8 +46,35 @@ const boolFromQuery = (value: string | null): boolean =>
 
 const tagStateLabel = (deprecatedAt: string | null) => deprecatedAt ? '廃止' : ''
 
+const parseLimit = (value: string | null): 20 | 50 | 100 | null => {
+  const n = Number (value)
+  return n === 20 || n === 50 || n === 100 ? n : null
+}
+
+const parseOrder = (value: string | null): FetchTagsOrder | null => {
+  switch (value)
+  {
+  case 'name:asc':
+  case 'name:desc':
+  case 'category:asc':
+  case 'category:desc':
+  case 'post_count:asc':
+  case 'post_count:desc':
+  case 'created_at:asc':
+  case 'created_at:desc':
+  case 'updated_at:asc':
+  case 'updated_at:desc':
+    return value
+
+  default:
+    return null
+  }
+}
+
 
 const TagListPage: FC = () => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
   const location = useLocation ()
 
   const navigate = useNavigate ()
@@ -44,7 +82,11 @@ const TagListPage: FC = () => {
   const query = useMemo (() => new URLSearchParams (location.search), [location.search])
 
   const page = Number (query.get ('page') ?? 1)
-  const limit = Number (query.get ('limit') ?? 20)
+  const limit = (
+      parseLimit (query.get ('limit'))
+      ?? getClientListLimit ('tagList')
+      ?? DEFAULT_POST_LIST_LIMIT
+  )
 
   const qName = query.get ('name') ?? ''
   const qCategory = (query.get ('category') || null) as Category | null
@@ -58,7 +100,11 @@ const TagListPage: FC = () => {
   const qDeprecated = query.has ('deprecated')
       ? boolFromQuery (query.get ('deprecated'))
       : null
-  const order = (query.get ('order') || 'post_count:desc') as FetchTagsOrder
+  const order = (
+      parseOrder (query.get ('order'))
+      ?? getClientListOrder<FetchTagsOrder> ('tagList')
+      ?? DEFAULT_TAG_LIST_ORDER
+  )
 
   const [name, setName] = useState ('')
   const [category, setCategory] = useState<Category | null> (null)
@@ -88,6 +134,10 @@ const TagListPage: FC = () => {
   const results = data?.tags ?? []
   const totalPages = data ? Math.ceil (data.count / limit) : 0
 
+  useEffect (() => {
+    setClientListSettings ('tagList', { limit, order })
+  }, [limit, order])
+
   useEffect (() => {
     setName (qName)
     setCategory (qCategory)
@@ -99,9 +149,11 @@ const TagListPage: FC = () => {
     setUpdatedTo (qUpdatedTo)
     setDeprecated (qDeprecated)
 
-    document.querySelector ('table')?.scrollIntoView ({ behavior: 'smooth' })
-  }, [location.search, qCategory, qCreatedFrom, qCreatedTo, qName, qPostCountGTE,
-      qPostCountLTE, qUpdatedFrom, qUpdatedTo, qDeprecated])
+    document.querySelector ('table')?.scrollIntoView ({
+	behavior: clientScrollBehaviour (animationMode) })
+  }, [animationMode, location.search, qCategory, qCreatedFrom, qCreatedTo,
+      qName, qPostCountGTE, qPostCountLTE, qUpdatedFrom, qUpdatedTo,
+      qDeprecated])
 
   const handleSearch = (e: FormEvent) => {
     e.preventDefault ()
@@ -121,16 +173,49 @@ const TagListPage: FC = () => {
       qs.set ('deprecated', deprecated ? '1' : '0')
     qs.set ('page', '1')
     qs.set ('order', order)
+    qs.set ('limit', String (limit))
 
     navigate (`${ location.pathname }?${ qs.toString () }`)
   }
 
+  const updateListQuery = (next: { limit?: 20 | 50 | 100
+				   order?: FetchTagsOrder }) => {
+    const qs = new URLSearchParams (location.search)
+    qs.set ('limit', String (next.limit ?? limit))
+    qs.set ('order', next.order ?? order)
+    qs.set ('page', '1')
+    navigate (`${ location.pathname }?${ qs.toString () }`)
+  }
+
+  const updatePage = (nextPage: number) => {
+    const qs = new URLSearchParams (location.search)
+    qs.set ('page', String (Math.max (1, nextPage)))
+    navigate (`${ location.pathname }?${ qs.toString () }`)
+  }
+
   const defaultDirection = { name: 'asc',
 			     category: 'asc',
 			     post_count: 'desc',
 			     created_at: 'desc',
 			     updated_at: 'desc' } as const
 
+  useKeyboardShortcuts (useMemo (() => ({
+      ...(page > 1
+	  ? {
+	      'pagination.previous': () => {
+		  updatePage (page - 1)
+	      },
+	  }
+	  : { }),
+      ...(totalPages > 0 && page < totalPages
+	  ? {
+	      'pagination.next': () => {
+		  updatePage (Math.min (page + 1, totalPages))
+	      },
+	  }
+	  : { }),
+  }), [page, totalPages, location.search]))
+
   return (
       <MainArea>
 	<Helmet>
@@ -138,7 +223,24 @@ const TagListPage: FC = () => {
 	</Helmet>
 
 	<div className="max-w-xl">
-	  <PageTitle>タグ</PageTitle>
+	  <div className="flex flex-wrap items-center justify-between gap-3">
+	    <PageTitle>タグ</PageTitle>
+	    <label className="flex items-center gap-2 text-xs text-muted-foreground">
+	      <span>件数</span>
+	      <select
+		  value={limit}
+		  onChange={ev => updateListQuery ({
+		      limit: Number (ev.target.value) as 20 | 50 | 100,
+		  })}
+		  className="rounded border border-border bg-background px-2 py-1 text-sm
+			     text-foreground">
+		{LIST_LIMIT_OPTIONS.map (value => (
+		    <option key={value} value={value}>
+		      {value}
+		    </option>))}
+	      </select>
+	    </label>
+	  </div>
 
 	  <form onSubmit={handleSearch} className="space-y-2">
 	    {/* 名前 */}
@@ -146,6 +248,7 @@ const TagListPage: FC = () => {
 	      {({ invalid }) => (
 		  <input
 		      type="text"
+		      data-shortcut-focus-search="true"
 		      value={name}
 		      onChange={e => setName (e.target.value)}
 		      className={inputClass (invalid)}/>)}

frontend/src/pages/theatres/TheatreDetailPage.test.tsx

@@ -41,6 +41,7 @@ const postEmbed = vi.hoisted (() => ({
 vi.mock ('@/lib/api', () => api)
 vi.mock ('@/lib/posts', () => postsApi)
 vi.mock ('@/components/dialogues/DialogueProvider', () => ({
+  default: ({ children }: { children: ReactNode }) => <>{children}</>,
   useDialogue: () => dialogue,
 }))
 vi.mock ('@/components/PostEmbed', () => ({

frontend/src/pages/theatres/TheatreDetailPage.tsx

@@ -15,7 +15,16 @@ import { Button } from '@/components/ui/button'
 import { SITE_TITLE } from '@/config'
 import { CATEGORIES, CATEGORY_NAMES } from '@/consts'
 import { apiDelete, apiGet, apiPatch, apiPost, apiPut, isApiError } from '@/lib/api'
+import { clientAnimationTransition,
+	 clientScrollBehaviour } from '@/lib/clientAnimation'
 import { fetchPost } from '@/lib/posts'
+import {
+  getClientTheatreLayoutMode,
+  getClientTheatreTagFlow,
+  setClientTheatreLayoutMode,
+  setClientTheatreTagFlow,
+} from '@/lib/settings'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { canEditContent } from '@/lib/users'
 import { cn, dateString, inputClass } from '@/lib/utils'
 import { useValidationErrors } from '@/lib/useValidationErrors'
@@ -51,8 +60,6 @@ const INITIAL_THEATRE_INFO: TheatreInfo =
 const INITIAL_WEIGHTS: TheatrePostSelectionWeights =
     { tagPenalties: [], lightestPosts: [], heaviestPosts: [] }
 
-const LAYOUT_STORAGE_KEY = 'theatre-layout-mode'
-const TAG_FLOW_STORAGE_KEY = 'theatre-tag-flow'
 const MIN_MAIN_WIDTH = 360
 const SIDEBAR_GAP_WIDTH = 16
 
@@ -208,6 +215,12 @@ type Props = { user: User | null }
 
 
 const TheatreDetailPage: FC<Props> = ({ user }: Props) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )
   const { id } = useParams ()
   const dialogue = useDialogue ()
 
@@ -236,32 +249,20 @@ const TheatreDetailPage: FC<Props> = ({ user }: Props) => {
   const [post, setPost] = useState<Post | null> (null)
   const [videoLength, setVideoLength] = useState (0)
   const [weights, setWeights] = useState<TheatrePostSelectionWeights> (INITIAL_WEIGHTS)
-  const [layoutMode, setLayoutMode] = useState<TheatreLayoutMode> (() => {
-    const stored = localStorage.getItem (LAYOUT_STORAGE_KEY)
-    return (
-	((['threeColumns', 'tagsBottom', 'commentsBottom'] as TheatreLayoutMode[])
-	 .includes (stored as TheatreLayoutMode))
-	? (stored as TheatreLayoutMode)
-	: 'threeColumns')
-  })
-  const [tagFlow, setTagFlow] = useState<TagFlow> (() => {
-    const stored = localStorage.getItem (TAG_FLOW_STORAGE_KEY)
-    return (
-	(['vertical', 'horizontal'] as TagFlow[]).includes (stored as TagFlow)
-	? (stored as TagFlow)
-	: 'vertical')
-  })
+  const [layoutMode, setLayoutMode] =
+      useState<TheatreLayoutMode> (() => getClientTheatreLayoutMode ())
+  const [tagFlow, setTagFlow] = useState<TagFlow> (() => getClientTheatreTagFlow ())
   const { fieldErrors, clearValidationErrors, applyValidationError } =
       useValidationErrors<TheatreCommentField> ()
 
   const changeLayoutMode = (mode: TheatreLayoutMode) => {
     setLayoutMode (mode)
-    localStorage.setItem (LAYOUT_STORAGE_KEY, mode)
+    setClientTheatreLayoutMode (mode)
   }
 
   const changeTagFlow = (flow: TagFlow) => {
     setTagFlow (flow)
-    localStorage.setItem (TAG_FLOW_STORAGE_KEY, flow)
+    setClientTheatreTagFlow (flow)
   }
 
   const applyTheatreInfo = useCallback ((nextInfo: TheatreInfo) => {
@@ -626,7 +627,9 @@ const TheatreDetailPage: FC<Props> = ({ user }: Props) => {
       clearValidationErrors ()
       await apiPost (`/theatres/${ id }/comments`, { content })
       setContent ('')
-      commentsRef.current?.scrollTo ({ top: 0, behavior: 'smooth' })
+      commentsRef.current?.scrollTo ({
+	  top: 0,
+	  behavior: clientScrollBehaviour (animationMode) })
     }
     catch (error)
     {
@@ -843,8 +846,8 @@ const TheatreDetailPage: FC<Props> = ({ user }: Props) => {
 
   return (
       <motion.div
-	  layout="position"
-	  transition={{ layout: { duration: .2, ease: 'easeOut' } }}
+	  layout={animationMode === 'off' ? false : 'position'}
+	  transition={{ layout: layoutTransition }}
 	  className="min-h-0 flex-1 overflow-y-auto bg-zinc-50 text-zinc-950
 		     md:overflow-hidden dark:bg-zinc-950 dark:text-zinc-50">
 	<Helmet>
@@ -868,7 +871,7 @@ const TheatreDetailPage: FC<Props> = ({ user }: Props) => {
 	      </SidebarComponent>)}
 
 	  <motion.main
-	      layout="position"
+	      layout={animationMode === 'off' ? false : 'position'}
 	      className="order-1 min-w-0 flex-1 space-y-4 md:order-none
 			 md:min-w-[360px] md:overflow-y-auto">
 	    <div className="space-y-4">

frontend/src/pages/users/SettingPage.test.tsx

@@ -6,6 +6,7 @@ import { buildUser } from '@/test/factories'
 import { renderWithProviders } from '@/test/render'
 
 const api = vi.hoisted (() => ({
+  apiGet:     vi.fn (),
   apiPut:     vi.fn (),
   isApiError: vi.fn (),
 }))
@@ -27,12 +28,23 @@ describe ('SettingPage', () => {
   beforeEach (() => {
     vi.clearAllMocks ()
     api.isApiError.mockReturnValue (false)
+    api.apiGet.mockImplementation ((path: string) => {
+      if (path === '/users/settings')
+	return Promise.resolve ({
+	    theme: 'system',
+	    auto_fetch_title: 'manual',
+	    auto_fetch_thumbnail: 'manual',
+	    wiki_editor_mode: 'split' })
+      if (path === '/users/theme_slots')
+	return Promise.resolve ([])
+      return Promise.resolve ({})
+    })
   })
 
   it ('shows loading when user is absent', () => {
     renderWithProviders (<SettingPage user={null} setUser={vi.fn ()}/>)
 
-    expect (screen.getByText ('Loading...')).toBeInTheDocument ()
+    expect (screen.getAllByText ('Loading...').length).toBeGreaterThan (0)
   })
 
   it ('updates the current user name', async () => {
@@ -42,8 +54,9 @@ describe ('SettingPage', () => {
 
     renderWithProviders (<SettingPage user={user} setUser={setUser}/>)
 
-    fireEvent.change (screen.getByRole ('textbox'), { target: { value: 'new' } })
-    fireEvent.click (screen.getByRole ('button', { name: '更新' }))
+    const nameInput = (await screen.findAllByRole ('textbox'))[0]
+    fireEvent.change (nameInput, { target: { value: 'new' } })
+    fireEvent.click (screen.getAllByRole ('button', { name: '表示名を更新' })[0])
 
     await waitFor (() => {
       expect (api.apiPut).toHaveBeenCalledWith (
@@ -55,7 +68,7 @@ describe ('SettingPage', () => {
     const formData = api.apiPut.mock.calls[0]?.[1] as FormData
     expect (formData.get ('name')).toBe ('new')
     expect (setUser).toHaveBeenCalled ()
-    expect (toastApi.toast).toHaveBeenCalledWith ({ title: '設定を更新しました．' })
+    expect (toastApi.toast).toHaveBeenCalledWith ({ title: '表示名を更新しました．' })
   })
 
   it ('shows validation errors returned for the name field', async () => {
@@ -75,10 +88,11 @@ describe ('SettingPage', () => {
 
     renderWithProviders (<SettingPage user={user} setUser={vi.fn ()}/>)
 
-    fireEvent.change (screen.getByRole ('textbox'), { target: { value: '' } })
-    fireEvent.click (screen.getByRole ('button', { name: '更新' }))
+    const nameInput = (await screen.findAllByRole ('textbox'))[0]
+    fireEvent.change (nameInput, { target: { value: '' } })
+    fireEvent.click (screen.getAllByRole ('button', { name: '表示名を更新' })[0])
 
-    expect (await screen.findByText ('名前は必須です．')).toBeInTheDocument ()
-    expect (screen.getByRole ('textbox')).toHaveAttribute ('aria-invalid', 'true')
+    expect ((await screen.findAllByText ('名前は必須です．')).length).toBeGreaterThan (0)
+    expect (nameInput).toHaveAttribute ('aria-invalid', 'true')
   })
 })

frontend/src/pages/wiki/WikiEditPage.tsx

@@ -24,6 +24,11 @@ import type { FC } from 'react'
 import type { User, WikiPage } from '@/types'
 
 const mdParser = new MarkdownIt
+const FIXED_WIKI_EDITOR_VIEW = { menu: true, md: true, html: true } as const
+
+// `wiki_editor_mode` is still kept in backend settings, but the common
+// settings screen does not expose it at present. Until that UI returns, the
+// editor stays on the fixed split view here.
 
 type Props = { user: User | null }
 
@@ -114,6 +119,7 @@ const WikiEditPage: FC<Props> = ({ user }) => {
 		  {() => (
 		      <MdEditor value={body}
 				style={{ height: '500px' }}
+				config={{ view: FIXED_WIKI_EDITOR_VIEW }}
 				renderHTML={text => mdParser.render (text)}
 				onChange={({ text }) => setBody (text)}/>)}
 		</FormField>

frontend/src/pages/wiki/WikiNewPage.tsx

@@ -22,6 +22,11 @@ import 'react-markdown-editor-lite/lib/index.css'
 import type { User, WikiPage } from '@/types'
 
 const mdParser = new MarkdownIt
+const FIXED_WIKI_EDITOR_VIEW = { menu: true, md: true, html: true } as const
+
+// `wiki_editor_mode` is still kept in backend settings, but the common
+// settings screen does not expose it at present. Until that UI returns, the
+// editor stays on the fixed split view here.
 
 type Props = { user: User | null }
 
@@ -92,6 +97,7 @@ const WikiNewPage: FC<Props> = ({ user }) => {
 	    {() => (
 		<MdEditor value={body}
 			  style={{ height: '500px' }}
+			  config={{ view: FIXED_WIKI_EDITOR_VIEW }}
 			  renderHTML={text => mdParser.render (text)}
 			  onChange={({ text }) => setBody (text)}/>)}
 	  </FormField>