設定画面 (#34) (#397)

Reviewed-on: #397 Co-authored-by: miteruzo <miteruzo@naver.com> Co-committed-by: miteruzo <miteruzo@naver.com>
2026-07-07 00:48:41 +09:00
@@ -4,6 +4,8 @@ import { motion } from 'framer-motion'
 import { useRef } from 'react'

 import TagLink from '@/components/TagLink'
+import { clientAnimationTransition } from '@/lib/clientAnimation'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'

 import type { CSSProperties, FC, MutableRefObject } from 'react'
@@ -20,6 +22,12 @@ type Props = {


 const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTagId, suppressClickRef, sp }) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )
  const dndId = `tag-node:${ pathKey }`

  const downPosRef = useRef<{ x: number; y: number } | null> (null)
@@ -94,8 +102,10 @@ const DraggableDroppableTagRow: FC<Props> = ({ tag, nestLevel, pathKey, parentTa
 	  {...listeners}>
 	<motion.div
 	    className="flex min-w-0 max-w-full items-baseline overflow-hidden"
-	    transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-	    layoutId={`tag-${ sp ? 'sp-' : '' }${ tag.id }`}>
+	    transition={{ layout: layoutTransition }}
+	    layoutId={animationMode === 'off'
+		? undefined
+		: `tag-${ sp ? 'sp-' : '' }${ tag.id }`}>
 	  <TagLink tag={tag} nestLevel={nestLevel}/>
 	</motion.div>
      </div>)
@@ -4,6 +4,8 @@ import YoutubeEmbed from 'react-youtube'
 import NicoViewer from '@/components/NicoViewer'
 import TwitterEmbed from '@/components/TwitterEmbed'
 import { useDialogue } from '@/components/dialogues/DialogueProvider'
+import { Button } from '@/components/ui/button'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'

 import type { FC, RefObject } from 'react'

@@ -24,16 +26,19 @@ type Props = {
    onError?:           (data: unknown) => void }


-const PostEmbed: FC<Props> = ({
-    ref,
-    post,
-    onLoadComplete,
-    onMetadataChange,
-    onVideoReady,
-    onPlaybackChange,
-    onError,
-}) => {
+const PostEmbed: FC<Props> = (
+    { ref,
+      post,
+      onLoadComplete,
+      onMetadataChange,
+      onVideoReady,
+      onPlaybackChange,
+      onError },
+) => {
  const dialogue = useDialogue ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const embedAutoLoadMode = behaviourSettings.embedAutoLoad ?? 'auto'
+  const [manualLoadRequested, setManualLoadRequested] = useState (false)
  const [framed, setFramed] = useState (false)
  const [youtubePlayer, setYoutubePlayer] = useState<YouTubePlayer | null> (null)
  const niconicoVideoReadyRef = useRef (false)
@@ -105,6 +110,10 @@ const PostEmbed: FC<Props> = ({
    niconicoVideoReadyRef.current = false
  }, [post.url])

+  useEffect (() => {
+    setManualLoadRequested (false)
+  }, [embedAutoLoadMode, post.url])
+
  useEffect (() => {
    if (!(youtubePlayer) || !(onPlaybackChange))
      return
@@ -117,6 +126,28 @@ const PostEmbed: FC<Props> = ({
  }, [onPlaybackChange, reportYoutubePlayback, youtubePlayer])

  const url = new URL (post.url)
+  const shouldLoadEmbed =
+      embedAutoLoadMode === 'auto'
+      || (
+	  embedAutoLoadMode === 'manual'
+	  && manualLoadRequested
+      )
+
+  const externalLink = (
+      <a href={post.url} target="_blank" rel="noreferrer">
+	外部ページを開く
+      </a>)
+
+  const manualLoadControl = (
+      <div className="flex flex-wrap items-center gap-3">
+	<Button
+	    type="button"
+	    variant="outline"
+	    onClick={() => setManualLoadRequested (true)}>
+	  埋め込みを読込
+	</Button>
+	{externalLink}
+      </div>)

  switch (url.hostname.split ('.').slice (-2).join ('.'))
  {
@@ -128,6 +159,11 @@ const PostEmbed: FC<Props> = ({

      const [videoId] = mVideoId

+      if (embedAutoLoadMode === 'off')
+	return externalLink
+      if (shouldLoadEmbed === false)
+	return manualLoadControl
+
      return (
 	  <NicoViewer
 	      ref={ref}
@@ -150,6 +186,11 @@ const PostEmbed: FC<Props> = ({
      const [userId] = mUserId
      const [statusId] = mStatusId

+      if (embedAutoLoadMode === 'off')
+	return externalLink
+      if (shouldLoadEmbed === false)
+	return manualLoadControl
+
      return <TwitterEmbed userId={userId} statusId={statusId}/>
    }

@@ -159,6 +200,11 @@ const PostEmbed: FC<Props> = ({
      if (!(videoId))
 	break

+      if (embedAutoLoadMode === 'off')
+	return externalLink
+      if (shouldLoadEmbed === false)
+	return manualLoadControl
+
      return (
 	  <YoutubeEmbed videoId={videoId} opts={{ playerVars: {
 	      playsinline:  1,
@@ -184,6 +230,11 @@ const PostEmbed: FC<Props> = ({
 		height={360}/>)
 	 : (
 	    <div>
+	      {embedAutoLoadMode === 'off'
+	       ? externalLink
+	       : embedAutoLoadMode === 'manual' && shouldLoadEmbed === false
+		 ? manualLoadControl
+		 : (
 	      <a href="#" onClick={async e => {
 		e.preventDefault ()

@@ -197,7 +248,7 @@ const PostEmbed: FC<Props> = ({
 		    confirmText: '表示' }))
 	      }}>
 		外部ページを表示
-	      </a>
+	      </a>)}
 	    </div>)}
      </>)
 }
@@ -68,9 +68,12 @@ const PostFormTagsArea: FC<Props> = ({ tags, setTags, errors, ...rest }) => {

    setBounds ({ start, end })

-    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: { q: token, nico: '0' } })
-    setSuggestions (data.filter (t => t.postCount > 0))
-    setSuggestionsVsbl (suggestions.length > 0)
+    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: {
+	q: token,
+	nico: '0' } })
+    const nextSuggestions = data.filter (t => t.postCount > 0)
+    setSuggestions (nextSuggestions)
+    setSuggestionsVsbl (nextSuggestions.length > 0)
  }

  return (
@@ -3,6 +3,7 @@ import { useRef } from 'react'
 import { useLocation } from 'react-router-dom'

 import PrefetchLink from '@/components/PrefetchLink'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'
 import { useSharedTransitionStore } from '@/stores/sharedTransitionStore'

@@ -16,6 +17,15 @@ type Props = { posts:     Post[]

 const PostList: FC<Props> = ({ posts, onClick }) => {
  const location = useLocation ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const thumbnailMode = behaviourSettings.thumbnailMode ?? 'normal'
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const cardLayoutTransition =
+      animationMode === 'off'
+      ? { duration: 0 }
+      : animationMode === 'reduced'
+	? { duration: .08, ease: 'linear' as const }
+	: { duration: .2, ease: 'easeOut' as const }

  const setForLocationKey = useSharedTransitionStore (s => s.setForLocationKey)

@@ -39,7 +49,8 @@ const PostList: FC<Props> = ({ posts, onClick }) => {
 		  }}>
 		<motion.div
 		    ref={cardRef}
-		    layoutId={layoutId}
+		    layout={animationMode === 'off' ? false : true}
+		    layoutId={animationMode === 'off' ? undefined : layoutId}
 		    className={cn ('w-full h-full overflow-hidden rounded-xl shadow',
 				   'transform-gpu will-change-transform',
 				   (post.childPosts ?? []).length > 0 && 'ring-4 ring-green-500',
@@ -54,22 +65,36 @@ const PostList: FC<Props> = ({ posts, onClick }) => {
 		    }}
 		    onLayoutAnimationComplete={() => {
 		      if (!(cardRef.current))
-			return 
+			return

 		      cardRef.current.style.zIndex = ''
 		      cardRef.current.style.position = ''
 		    }}
-		    transition={{ layout: { duration: .2, ease: 'easeOut' } }}>
-		  <img src={post.thumbnail || post.thumbnailBase || undefined}
-		       alt={post.title || post.url}
-		       title={post.title || post.url || undefined}
-		       loading={i < 12 ? 'eager' : 'lazy'}
-		       decoding="async"
-		       className="object-cover w-full h-full"/>
+		    transition={{ layout: cardLayoutTransition }}>
+		  {thumbnailMode === 'off'
+		   ? (
+		      <div className="flex h-full w-full items-center justify-center
+				      bg-muted text-center text-xs text-muted-foreground">
+			サムネイルなし
+		      </div>)
+		   : (
+		      <img
+			  src={post.thumbnail || post.thumbnailBase || undefined}
+			  alt={post.title || post.url}
+			  title={post.title || post.url || undefined}
+			  loading={
+			      thumbnailMode === 'light'
+			      ? 'lazy'
+			      : i < 12
+				? 'eager'
+				: 'lazy'
+			  }
+			  decoding="async"
+			  className="object-cover w-full h-full"/>)}
 		</motion.div>
 	      </PrefetchLink>)
 	})}
      </div>)
 }

-export default PostList
+export default PostList
@@ -5,6 +5,8 @@ import { createPath, useNavigate } from 'react-router-dom'

 import { useOverlayStore } from '@/components/RouteBlockerOverlay'
 import { prefetchForURL } from '@/lib/prefetchers'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
+import { useUnsavedChangesGuard } from '@/lib/useUnsavedChangesGuard'
 import { cn } from '@/lib/utils'

 import type { AnchorHTMLAttributes, MouseEvent, TouchEvent } from 'react'
@@ -33,10 +35,20 @@ export default forwardRef<HTMLAnchorElement, Props> (({

  const navigate = useNavigate ()
  const qc = useQueryClient ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const { confirmDiscardNavigation } = useUnsavedChangesGuard ()
+  const linkPreloadMode = behaviourSettings.linkPreload ?? 'intent'
+  const path = useMemo (
+      () => typeof to === 'string' ? to : createPath (to),
+      [to],
+  )
  const url = useMemo (() => {
-    const path = (typeof to === 'string') ? to : createPath (to)
-    return (new URL (path, location.origin)).toString ()
-  }, [to])
+    return (new URL (path, window.location.origin)).toString ()
+  }, [path])
+  const nextPathname = useMemo (
+      () => (new URL (path, window.location.origin)).pathname,
+      [path],
+  )
  const setOverlay = useOverlayStore (s => s.setActive)

  const doPrefetch = async () => {
@@ -54,11 +66,15 @@ export default forwardRef<HTMLAnchorElement, Props> (({

  const handleMouseEnter = async (ev: MouseEvent<HTMLAnchorElement>) => {
    onMouseEnter?.(ev)
+    if (ev.defaultPrevented || linkPreloadMode !== 'intent')
+      return
    await doPrefetch ()
  }

  const handleTouchStart = async (ev: TouchEvent<HTMLAnchorElement>) => {
    onTouchStart?.(ev)
+    if (ev.defaultPrevented || linkPreloadMode !== 'intent')
+      return
    await doPrefetch ()
  }

@@ -77,6 +93,13 @@ export default forwardRef<HTMLAnchorElement, Props> (({

      ev.preventDefault ()

+      if (nextPathname !== window.location.pathname)
+	{
+	  const confirmed = await confirmDiscardNavigation ()
+	  if (!(confirmed))
+	    return
+	}
+
      flushSync (() => {
 	setOverlay (true)
      })
@@ -99,7 +122,7 @@ export default forwardRef<HTMLAnchorElement, Props> (({

  return (
      <a ref={ref}
-	 href={typeof to === 'string' ? to : createPath (to)}
+	 href={path}
 	 onMouseEnter={handleMouseEnter}
 	 onTouchStart={handleTouchStart}
 	 onClick={handleClick}
@@ -1,3 +1,4 @@
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'
 import { useEffect, useRef, useState } from 'react'

@@ -20,6 +21,8 @@ const MIN_MARQUEE_OVERFLOW_PX = 1
 const ResponsiveMarqueeText: FC<Props> = (
    { text, className, truncateOnMobile = false, title },
 ) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
  const outerRef = useRef<HTMLSpanElement | null> (null)
  const staticRef = useRef<HTMLSpanElement | null> (null)
  const animatedRef = useRef<HTMLSpanElement | null> (null)
@@ -98,6 +101,7 @@ const ResponsiveMarqueeText: FC<Props> = (
    const animated = animatedRef.current
    const canMarquee = (
        active
+        && animationMode !== 'off'
        && desktopMarqueeEnabled
        && overflowPx >= MIN_MARQUEE_OVERFLOW_PX
        && animated != null)
@@ -207,7 +211,7 @@ const ResponsiveMarqueeText: FC<Props> = (
      resetAnimated ()
      setMarqueeVisible (false)
    }
-  }, [active, desktopMarqueeEnabled, overflowPx, text])
+  }, [active, animationMode, desktopMarqueeEnabled, overflowPx, text])

  return (
      <span
@@ -20,7 +20,9 @@ import SidebarComponent from '@/components/layout/SidebarComponent'
 import { toast } from '@/components/ui/use-toast'
 import { CATEGORIES, CATEGORY_NAMES } from '@/consts'
 import { apiDelete, apiGet, apiPatch, apiPost } from '@/lib/api'
+import { clientAnimationTransition } from '@/lib/clientAnimation'
 import { postsKeys, tagsKeys } from '@/lib/queryKeys'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { dateString, originalCreatedAtString } from '@/lib/utils'

 import type { DragEndEvent } from '@dnd-kit/core'
@@ -60,7 +62,6 @@ const renderTagTree = (
 	  ?? [])]
 }

-
 const isDescendant = (
    root:     TagWithSections,
    targetId: number,
@@ -127,6 +128,37 @@ const buildTagByCategory = (post: Post): TagByCategory => {
 }


+const buildFlatTagByCategory = (
+    byCategory: TagByCategory,
+): TagByCategory => {
+  const tagsTmp = { } as TagByCategory
+  const seen = new Set<number> ()
+
+  for (const category of CATEGORIES)
+    tagsTmp[category] = []
+
+  const visit = (tag: TagWithSections) => {
+    if (seen.has (tag.id))
+      return
+
+    seen.add (tag.id)
+    tagsTmp[tag.category].push ({ ...tag, children: [] })
+
+    for (const child of tag.children ?? [])
+      visit (child)
+  }
+
+  for (const category of CATEGORIES)
+    for (const tag of byCategory[category] ?? [])
+      visit (tag)
+
+  for (const category of CATEGORIES)
+    tagsTmp[category].sort ((tagA, tagB) => tagA.name < tagB.name ? -1 : 1)
+
+  return tagsTmp
+}
+
+
 const changeCategory = async (
    tagId:    number,
    category: Category): Promise<void> => {
@@ -156,6 +188,13 @@ const TagDetailSidebar: FC<Props> = ({ className, post, sp }) => {
  sp = Boolean (sp)

  const qc = useQueryClient ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const tagRelationDisplay = behaviourSettings.tagRelationDisplay ?? 'grouped'
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )

  const baseTags = useMemo<TagByCategory> (() => {
    const tagsTmp = { } as TagByCategory
@@ -177,6 +216,10 @@ const TagDetailSidebar: FC<Props> = ({ className, post, sp }) => {
  const [dragging, setDragging] = useState (false)
  const [saving, setSaving] = useState (false)
  const [tags, setTags] = useState (baseTags)
+  const flatTagsByCategory = useMemo<TagByCategory> (
+      () => buildFlatTagByCategory (tags),
+      [tags],
+  )

  const suppressClickRef = useRef (false)

@@ -310,26 +353,58 @@ const TagDetailSidebar: FC<Props> = ({ className, post, sp }) => {
 	      document.body.style.userSelect = ''
 	    }}
 	    modifiers={[restrictToWindowEdges]}>
-	  {CATEGORIES.map ((cat: Category) => ((tags[cat] ?? []).length > 0 || dragging) && (
-	      <div className="my-3" key={cat}>
-		<SubsectionTitle>
-		  <motion.div
-		      layoutId={`tag-${ sp ? 'sp-' : '' }${ cat }`}
-		      transition={{ layout: { duration: .2, ease: 'easeOut' } }}>
-		    {CATEGORY_NAMES[cat]}
-		  </motion.div>
-		</SubsectionTitle>
+	  {CATEGORIES.map ((cat: Category) => {
+	    const categoryTags =
+		tagRelationDisplay === 'grouped'
+		? (tags[cat] ?? [])
+		: (flatTagsByCategory[cat] ?? [])

-		<ul>
-		  {(tags[cat] ?? []).flatMap (tag => (
-		      renderTagTree (tag, 0, `cat-${ cat }`, suppressClickRef, undefined, sp)))}
-		  <DropSlot cat={cat}/>
-		</ul>
-	      </div>))}
+	    if (!(categoryTags.length > 0 || dragging))
+	      return null
+
+	    return (
+		<div className="my-3" key={cat}>
+		  <SubsectionTitle>
+		    <motion.div
+			layoutId={animationMode === 'off'
+			    ? undefined
+			    : `tag-${ sp ? 'sp-' : '' }${ cat }`}
+			transition={{ layout: layoutTransition }}>
+		      {CATEGORY_NAMES[cat]}
+		    </motion.div>
+		  </SubsectionTitle>
+
+		  <ul>
+		    {(tagRelationDisplay === 'grouped'
+		      ? (tags[cat] ?? []).flatMap (tag =>
+			    renderTagTree (
+				tag,
+				0,
+				`cat-${ cat }`,
+				suppressClickRef,
+				undefined,
+				sp,
+			    ),
+			)
+		      : (flatTagsByCategory[cat] ?? []).map (tag => (
+			  <li key={`flat-${ cat }-${ tag.id }`} className="mb-1">
+			    <DraggableDroppableTagRow
+				tag={tag}
+				nestLevel={0}
+				pathKey={`flat-${ cat }-${ tag.id }`}
+				suppressClickRef={suppressClickRef}
+				sp={sp}/>
+			  </li>)))}
+		    <DropSlot cat={cat}/>
+		  </ul>
+		</div>)
+	  })}
 	  {post && (
 	      <motion.div
-		  layoutId={`post-info-${ sp }`}
-		  transition={{ layout: { duration: .2, ease: 'easeOut' } }}>
+		  layoutId={animationMode === 'off'
+		      ? undefined
+		      : `post-info-${ sp }`}
+		  transition={{ layout: layoutTransition }}>
 		<SectionTitle>情報</SectionTitle>
 		<ul>
 		  <li>Id.: {post.id}</li>
@@ -1,9 +1,8 @@
 import PrefetchLink from '@/components/PrefetchLink'
 import ResponsiveMarqueeText from '@/components/ResponsiveMarqueeText'
-import { LIGHT_COLOUR_SHADE, DARK_COLOUR_SHADE, TAG_COLOUR } from '@/consts'
 import { cn } from '@/lib/utils'

-import type { ComponentProps, FC, HTMLAttributes } from 'react'
+import type { ComponentProps, CSSProperties, FC, HTMLAttributes } from 'react'

 import type { Tag } from '@/types'

@@ -36,15 +35,16 @@ const TagLink: FC<Props> = ({ tag,
 			      withWiki  = true,
 			      withCount = true,
 			      className,
+			      style,
 			      title,
 			      ...props }) => {
-  const spanClass = cn (
-      `text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE }`,
-      `dark:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE }`)
-  const linkClass = cn (
-      spanClass,
-      `hover:text-${ TAG_COLOUR[tag.category] }-${ LIGHT_COLOUR_SHADE - 200 }`,
-      `dark:hover:text-${ TAG_COLOUR[tag.category] }-${ DARK_COLOUR_SHADE - 200 }`)
+  const colourStyle = {
+      '--tag-link-colour': `var(--tag-colour-${ tag.category })`,
+      '--tag-link-hover-colour': `var(--tag-colour-${ tag.category }-hover)`,
+      ...style,
+  } as CSSProperties
+  const spanClass = 'tag-link-colour'
+  const linkClass = 'tag-link-colour tag-link-hover-colour'
  const textClass = 'group min-w-0 max-w-full overflow-hidden align-bottom'
  const rootClass =
      'inline-flex min-w-0 max-w-full flex-nowrap items-stretch align-baseline gap-x-1 md:items-baseline'
@@ -63,7 +63,8 @@ const TagLink: FC<Props> = ({ tag,
 		  ? (
 		      <PrefetchLink
 			  to={`/wiki/${ encodeURIComponent (tag.name) }`}
-			  className={linkClass}>
+			  className={linkClass}
+			  style={colourStyle}>
 			?
 		      </PrefetchLink>)
 		  : (
@@ -71,13 +72,15 @@ const TagLink: FC<Props> = ({ tag,
 		      ? (
 			  <PrefetchLink
 			      to={`/materials/${ tag.materialId }`}
-			      className={linkClass}>
+			      className={linkClass}
+			      style={colourStyle}>
 			    ?
 			  </PrefetchLink>)
 		      : (
 			  <PrefetchLink
 			      to={`/tags/${ tag.id }/deerjikists`}
-			      className={linkClass}>
+			      className={linkClass}
+			      style={colourStyle}>
 			    ?
 			  </PrefetchLink>)))
 	       : (
@@ -120,6 +123,7 @@ const TagLink: FC<Props> = ({ tag,
 	      <span
 		  title={textTitle}
 		  className={cn (spanClass, textClass, className)}
+		  style={colourStyle}
 		  {...props}>
 		<ResponsiveMarqueeText
 		    text={tag.matchedAlias}
@@ -134,6 +138,7 @@ const TagLink: FC<Props> = ({ tag,
 		to={`/posts?${ (new URLSearchParams ({ tags: tag.name })).toString () }`}
 		title={textTitle}
 		className={cn (linkClass, textClass, className)}
+		style={colourStyle}
 		{...props}>
 	      <ResponsiveMarqueeText
 		  text={tag.name}
@@ -144,6 +149,7 @@ const TagLink: FC<Props> = ({ tag,
 	    <span
 		  title={textTitle}
 		  className={cn (spanClass, textClass, className)}
+		  style={colourStyle}
 		  {...props}>
 	      <ResponsiveMarqueeText
 		  text={tag.name}
@@ -105,6 +105,7 @@ const TagSearch: FC = () => {
  return (
      <div className="relative w-full">
 	<input type="text"
+	       data-shortcut-focus-search="true"
 	       placeholder="タグ検索..."
 	       value={search}
 	       onChange={whenChanged}
@@ -8,6 +8,8 @@ import SectionTitle from '@/components/common/SectionTitle'
 import SidebarComponent from '@/components/layout/SidebarComponent'
 import { CATEGORIES } from '@/consts'
 import { apiGet } from '@/lib/api'
+import { clientAnimationTransition } from '@/lib/clientAnimation'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'

 import type { FC, MouseEvent } from 'react'

@@ -21,6 +23,13 @@ type Props = { posts:     Post[]

 const TagSidebar: FC<Props> = ({ posts, onClick }) => {
  const navigate = useNavigate ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const animationsOff = animationMode === 'off'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )

  const [tagsVsbl, setTagsVsbl] = useState (false)
  const [tags, setTags] = useState<TagByCategory> ({ })
@@ -65,12 +74,18 @@ const TagSidebar: FC<Props> = ({ posts, onClick }) => {
 	  {CATEGORIES.flatMap (cat => cat in tags ? (
 	      tags[cat].map (tag => (
 		  <li key={tag.id} className="mb-1 min-w-0 max-w-full overflow-hidden">
-		    <motion.div
-			className="flex min-w-0 max-w-full items-baseline overflow-hidden"
-			transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-			layoutId={`tag-${ tag.id }`}>
-		      <TagLink tag={tag} onClick={onClick}/>
-		    </motion.div>
+		    {animationsOff
+		     ? (
+			 <div className="flex min-w-0 max-w-full items-baseline overflow-hidden">
+			   <TagLink tag={tag} onClick={onClick}/>
+			 </div>)
+		     : (
+			 <motion.div
+			     className="flex min-w-0 max-w-full items-baseline overflow-hidden"
+			     transition={{ layout: layoutTransition }}
+			     layoutId={`tag-${ tag.id }`}>
+			   <TagLink tag={tag} onClick={onClick}/>
+			 </motion.div>)}
 		  </li>))) : [])}
 	</ul>
 	<SectionTitle>関聯</SectionTitle>
@@ -103,18 +118,25 @@ const TagSidebar: FC<Props> = ({ posts, onClick }) => {
 	  {posts.length > 0 && TagBlock}
 	</div>

-	<AnimatePresence initial={false}>
-	  {tagsVsbl && (
-	      <motion.div
-		  key="sptags"
-		  className="md:hidden overflow-hidden"
-		  initial={{ height: 0 }}
-		  animate={{ height: 'auto' }}
-		  exit={{ height: 0 }}
-		  transition={{ duration: .2, ease: 'easeOut' }}>
-		{posts.length > 0 && TagBlock}
-	      </motion.div>)}
-	</AnimatePresence>
+	{animationsOff
+	 ? (
+	     tagsVsbl && (
+		 <div className="md:hidden overflow-hidden">
+		   {posts.length > 0 && TagBlock}
+		 </div>))
+	 : (
+	     <AnimatePresence initial={false}>
+	       {tagsVsbl && (
+		   <motion.div
+		       key="sptags"
+		       className="md:hidden overflow-hidden"
+		       initial={{ height: 0 }}
+		       animate={{ height: 'auto' }}
+		       exit={{ height: 0 }}
+		       transition={layoutTransition}>
+		     {posts.length > 0 && TagBlock}
+		   </motion.div>)}
+	     </AnimatePresence>)}

 	<a href="#"
 	   className="md:hidden block my-2 text-center text-sm
@@ -8,6 +8,7 @@ import PrefetchLink from '@/components/PrefetchLink'
 import TopNavUser from '@/components/TopNavUser'
 import { WikiIdBus } from '@/lib/eventBus/WikiIdBus'
 import { materialsKeys, tagsKeys, wikiKeys } from '@/lib/queryKeys'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { fetchTag, fetchTagByName } from '@/lib/tags'
 import { fetchMaterial } from '@/lib/materials'
 import { cn } from '@/lib/utils'
@@ -91,6 +92,10 @@ export const menuOutline = (

 const TopNav: FC<Props> = ({ user }) => {
  const location = useLocation ()
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const animationsOff = animationMode === 'off'
+  const reducedAnimations = animationMode === 'reduced'

  const dirRef = useRef<(-1) | 1> (1)
  const itemsRef = useRef<(HTMLAnchorElement | null)[]> ([])
@@ -155,6 +160,24 @@ const TopNav: FC<Props> = ({ user }) => {
  const activeIdx =
      visibleMenu.findIndex (item => location.pathname.startsWith (item.base || item.to))
  const submenuHeight = moreVsbl ? 40 * moreMenu.length : (activeIdx < 0 ? 0 : 40)
+  const topNavTransition =
+      animationsOff
+      ? { duration: 0 }
+      : reducedAnimations
+	? { duration: .08, ease: 'linear' as const }
+	: { duration: .2, ease: 'easeOut' as const }
+  const opacityTransition =
+      animationsOff
+      ? { duration: 0 }
+      : reducedAnimations
+	? { duration: .08 }
+	: { duration: .12 }
+  const highlightTransitionClass =
+      animationsOff
+      ? undefined
+      : reducedAnimations
+	? 'transition-[transform,width] duration-75 ease-linear'
+	: 'transition-[transform,width] duration-200 ease-out'

  const prevActiveIdxRef = useRef<number> (activeIdx)

@@ -189,13 +212,11 @@ const TopNav: FC<Props> = ({ user }) => {

  return (
      <>
-	<nav className="px-3 flex justify-between items-center w-full
-			bg-yellow-200 dark:bg-red-975 md:bg-yellow-50">
+	<nav className="top-nav-root px-3 flex justify-between items-center w-full">
 	  <div className="flex items-center gap-2 h-12">
 	    <PrefetchLink
 		to="/posts"
-		className="mx-4 text-xl font-bold text-pink-600 hover:text-pink-400
-			   dark:text-pink-300 dark:hover:text-pink-100"
+		className="top-nav-brand-link mx-4 text-xl font-bold"
 		onClick={() => {
 		  scroll (0, 0)
 		}}>
@@ -205,8 +226,8 @@ const TopNav: FC<Props> = ({ user }) => {
 	    <div ref={navRef} className="relative hidden md:flex h-12 items-center">
 	      <div aria-hidden
 		   className={cn ('absolute inset-y-0 h-12',
-				  'bg-yellow-200 dark:bg-red-950',
-				  'transition-[transform,width] duration-200 ease-out')}
+				  'top-nav-highlight',
+				  highlightTransitionClass)}
 		   style={{ width:      hl.width,
 			    transform:  `translateX(${ hl.left }px)`,
 			    opacity:    hl.visible ? 1 : 0 }}/>
@@ -214,10 +235,12 @@ const TopNav: FC<Props> = ({ user }) => {
 	      {visibleMenu.map ((item, i) => (
 		  <motion.div
 		      key={item.to}
-		      layoutId={`menu-${ item.name }`}
+		      {...(animationsOff
+			   ? { }
+			   : { layoutId: `menu-${ item.name }` })}
 		      animate={{ opacity: moreVsbl ? 0 : 1 }}
-		      transition={{ opacity: { duration: .12 },
-				    layout: { duration: .2, ease: 'easeOut' } }}
+		      transition={{ opacity: opacityTransition,
+				    layout: topNavTransition }}
 		      style={{ pointerEvents: moreVsbl ? 'none' : 'auto' }}
 		      onMouseEnter={() => setMoreVsbl (false)}>
 		    <PrefetchLink
@@ -225,7 +248,7 @@ const TopNav: FC<Props> = ({ user }) => {
 			ref={(el: (HTMLAnchorElement | null)) => {
 			  itemsRef.current[i] = el
 			}}
-			className={cn ('relative z-10 flex h-full items-center px-5',
+			className={cn ('top-nav-menu-link relative z-10 flex h-full items-center px-5',
 				       (i === openItemIdx) && 'font-bold')}>
 		      {item.name}
 		    </PrefetchLink>
@@ -240,7 +263,7 @@ const TopNav: FC<Props> = ({ user }) => {
 		    setMoreVsbl (true)
 		    measure (-1)
 		  }}
-		  className={cn ('relative z-10 flex h-full items-center px-5',
+		  className={cn ('top-nav-menu-link relative z-10 flex h-full items-center px-5',
 				 (openItemIdx < 0 || moreVsbl) && 'font-bold')}>
 		その他 &raquo;
 	      </PrefetchLink>
@@ -249,30 +272,28 @@ const TopNav: FC<Props> = ({ user }) => {

 	  <TopNavUser user={user}/>

-	  <a href="#"
-	     className="md:hidden ml-auto pr-4
-			text-pink-600 hover:text-pink-400
-			dark:text-pink-300 dark:hover:text-pink-100"
-	     onClick={ev => {
-	       ev.preventDefault ()
+	  <button
+	     type="button"
+	     className="top-nav-mobile-toggle md:hidden ml-auto border-0 bg-transparent pr-4"
+	     onClick={() => {
 	       setMenuOpen (!(menuOpen))
 	     }}>
 	    {menuOpen ? '×' : 'Menu'}
-	  </a>
+	  </button>
 	</nav>

 	<AnimatePresence initial={false}>
 	  <motion.div
 	      key="submenu-shell"
-	      layout
-	      className="relative z-20 hidden md:block overflow-hidden
-			 bg-yellow-200 dark:bg-red-950"
+	      {...(animationsOff ? { }
+		   : { layout: true })}
+	      className="relative z-20 hidden md:block overflow-hidden top-nav-submenu"
 	      animate={{ height: submenuHeight }}
 	      onMouseLeave={() => {
 		if (moreVsbl)
 		  setMoreVsbl (false)
 	      }}
-	      transition={{ layout: { duration: .2, ease: 'easeOut' } }}
+	      transition={{ layout: topNavTransition }}
 	      onAnimationComplete={() => {
 		measure (moreVsbl ? -1 : activeIdx)
 	      }}>
@@ -282,12 +303,14 @@ const TopNav: FC<Props> = ({ user }) => {
 		  <div key={i} className="relative h-[40px]">
 		    <div className="absolute inset-0 flex items-center px-3">
 		      <motion.div
-			  transition={{ duration: .2, ease: 'easeOut' }}
-			  {...((item.visible ?? true)
+			  transition={topNavTransition}
+			  {...(animationsOff
+			       ? { }
+			       : ((item.visible ?? true)
 			       ? { layoutId: `menu-${ item.name }` }
 			       : { initial: { x: 40, y: -40, opacity: 0 },
 				   animate: { x: 0, y: 0, opacity: 1 },
-				   exit: { x: 40, y: -40, opacity: 0 } })}
+				   exit: { x: 40, y: -40, opacity: 0 } }))}
 			  className="z-10 h-full flex items-center px-3 font-bold w-28">
 			<h2>{item.name}</h2>
 		      </motion.div>
@@ -298,30 +321,34 @@ const TopNav: FC<Props> = ({ user }) => {
 			  ? (
 			      <motion.div
 				  key={`c-${ i }-${ j }`}
-				  transition={{ duration: .2, ease: 'easeOut' }}
-				  {...((visibleMenu[activeIdx]?.name
+				  transition={topNavTransition}
+				  {...(animationsOff
+				       ? { }
+				       : ((visibleMenu[activeIdx]?.name
 					=== item.name)
 				       ? { layoutId: `submenu-${ item.name }-${ j }` }
 				       : { initial: { y: -40, opacity: 0 },
 					   animate: { y: 0, opacity: 1 },
-					   exit: { y: -40, opacity: 0 } })}>
+					   exit: { y: -40, opacity: 0 } }))}>
 				{subItem.component}
 			      </motion.div>)
 			  : (
 			      <motion.div
 				  key={`l-${ i }-${ j }`}
-				  transition={{ duration: .2, ease: 'easeOut' }}
-				  {...((visibleMenu[activeIdx]?.name
+				  transition={topNavTransition}
+				  {...(animationsOff
+				       ? { }
+				       : ((visibleMenu[activeIdx]?.name
 					=== item.name)
 				       ? { layoutId: `submenu-${ item.name }-${ j }` }
 				       : { initial: { y: -40, opacity: 0 },
 					   animate: { y: 0, opacity: 1 },
-					   exit: { y: -40, opacity: 0 } })}>
+					   exit: { y: -40, opacity: 0 } }))}>
 				<PrefetchLink
 				    to={subItem.to}
 				    target={subItem.to.slice (0, 2) === '//' ? '_blank' : undefined}
 				    onClick={() => setMoreVsbl (false)}
-				    className="h-full flex items-center px-3">
+				    className="top-nav-menu-link h-full flex items-center px-3">
 				  {subItem.name}
 				</PrefetchLink>
 			      </motion.div>)))}
@@ -330,129 +357,215 @@ const TopNav: FC<Props> = ({ user }) => {
 	   : ((visibleMenu[activeIdx]?.subMenu ?? []).length > 0
 	      && (
 		  <div className="relative h-[40px]">
-		    <AnimatePresence initial={false} custom={dir}>
-		      <motion.div
-			  key={activeIdx}
-			  custom={dir}
-			  variants={{ enter: (d: -1 | 1) => ({ y: d * 24, opacity: 0 }),
-				      centre: { y: 0, opacity: 1 },
-				      exit: (d: -1 | 1) => ({ y: (-d) * 24, opacity: 0 }) }}
-			  className="absolute inset-0 flex items-center px-3"
-			  initial="enter"
-			  animate="centre"
-			  exit="exit"
-			  transition={{ duration: .2, ease: 'easeOut' }}>
-			{(visibleMenu[activeIdx]?.subMenu ?? [])
-			 .filter (item => item.visible ?? true)
-			 .map ((item, i) => (
-			    'component' in item
-			    ? (
-				<motion.div
-				    key={`c-${ i }`}
-				    transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-				    layoutId={`submenu-${ visibleMenu[activeIdx].name }-${ i }`}>
-				  {item.component}
-				</motion.div>)
-			    : (
-				<motion.div
-				    key={`l-${ i }`}
-				    transition={{ layout: { duration: .2, ease: 'easeOut' } }}
-				    layoutId={`submenu-${ visibleMenu[activeIdx].name }-${ i }`}>
-				  <PrefetchLink
-				      to={item.to}
-				      target={item.to.slice (0, 2) === '//' ? '_blank' : undefined}
-				      className="h-full flex items-center px-3">
-				    {item.name}
-				  </PrefetchLink>
-				</motion.div>)))}
-		      </motion.div>
-		    </AnimatePresence>
+		    {animationsOff
+		     ? (
+			 <div className="absolute inset-0 flex items-center px-3">
+			   {(visibleMenu[activeIdx]?.subMenu ?? [])
+			    .filter (item => item.visible ?? true)
+			    .map ((item, i) => (
+			       'component' in item
+			       ? (
+				   <div key={`c-${ i }`}>
+				     {item.component}
+				   </div>)
+			       : (
+				   <div key={`l-${ i }`}>
+				     <PrefetchLink
+					 to={item.to}
+					 target={item.to.slice (0, 2) === '//'
+						 ? '_blank'
+						 : undefined}
+					 className="top-nav-menu-link h-full flex items-center px-3">
+				       {item.name}
+				     </PrefetchLink>
+				   </div>)))}
+			 </div>)
+		     : (
+			 <AnimatePresence initial={false} custom={dir}>
+			   <motion.div
+			       key={activeIdx}
+			       custom={dir}
+			       variants={{ enter: (d: -1 | 1) => ({ y: d * 24, opacity: 0 }),
+					   centre: { y: 0, opacity: 1 },
+					   exit: (d: -1 | 1) => ({ y: (-d) * 24, opacity: 0 }) }}
+			       className="absolute inset-0 flex items-center px-3"
+			       initial="enter"
+			       animate="centre"
+			       exit="exit"
+			       transition={topNavTransition}>
+			     {(visibleMenu[activeIdx]?.subMenu ?? [])
+			      .filter (item => item.visible ?? true)
+			      .map ((item, i) => (
+				 'component' in item
+				 ? (
+				     <motion.div
+					 key={`c-${ i }`}
+					 transition={{ layout: topNavTransition }}
+					 layoutId={`submenu-${ visibleMenu[activeIdx].name }-${ i }`}>
+				       {item.component}
+				     </motion.div>)
+				 : (
+				     <motion.div
+					 key={`l-${ i }`}
+					 transition={{ layout: topNavTransition }}
+					 layoutId={`submenu-${ visibleMenu[activeIdx].name }-${ i }`}>
+				       <PrefetchLink
+					   to={item.to}
+					   target={item.to.slice (0, 2) === '//'
+						   ? '_blank'
+						   : undefined}
+					   className="top-nav-menu-link h-full flex items-center px-3">
+					 {item.name}
+				       </PrefetchLink>
+				     </motion.div>)))}
+			   </motion.div>
+			 </AnimatePresence>)}
 		  </div>))}
 	  </motion.div>
 	</AnimatePresence>

-	<AnimatePresence initial={false}>
-	  {menuOpen && (
-	      <motion.div
-		  key="spmenu"
-		  className={cn ('flex flex-col md:hidden',
-				 'bg-yellow-200 dark:bg-red-975 items-start')}
-		  variants={{ closed: { clipPath: 'inset(0 0 100% 0)',
-					height:   0 },
-			      open:   { clipPath: 'inset(0 0 0% 0)',
-					height:   'auto' } }}
-		  initial="closed"
-		  animate="open"
-		  exit="closed"
-		  transition={{ duration: .2, ease: 'easeOut' }}>
-		<Separator/>
-		{visibleMenu.map ((item, i) => (
-		    <Fragment key={i}>
-		      <PrefetchLink
-			  to={i === openItemIdx ? item.to : '#'}
-			  className={cn ('w-full min-h-[40px] flex items-center pl-8',
-				     ((i === openItemIdx)
-				      && 'font-bold bg-yellow-50 dark:bg-red-950'))}
-			  onClick={(ev: MouseEvent<HTMLAnchorElement>) => {
-			    if (i !== openItemIdx)
-			      {
-				ev.preventDefault ()
-				setOpenItemIdx (i)
-			      }
-			  }}>
-			{item.name}
-		      </PrefetchLink>
+	{animationsOff
+	 ? (
+	     menuOpen && (
+		 <div
+		     className={cn ('top-nav-root top-nav-mobile-menu flex flex-col md:hidden',
+				    'items-start')}>
+		   <Separator/>
+		   {visibleMenu.map ((item, i) => (
+		       <Fragment key={i}>
+			 <PrefetchLink
+			     to={i === openItemIdx ? item.to : '#'}
+			     className={cn ('top-nav-mobile-row w-full min-h-[40px] flex items-center pl-8',
+					((i === openItemIdx)
+					 && 'top-nav-mobile-active font-bold'))}
+			     onClick={(ev: MouseEvent<HTMLAnchorElement>) => {
+			       if (i !== openItemIdx)
+				 {
+				   ev.preventDefault ()
+				   setOpenItemIdx (i)
+				 }
+			     }}>
+			   {item.name}
+			 </PrefetchLink>

-		      <AnimatePresence initial={false}>
-			{i === openItemIdx && (
-			    <motion.div
-				key={`sp-sub-${ i }`}
-				className="w-full bg-yellow-50 dark:bg-red-950"
-				variants={{ closed: { clipPath: 'inset(0 0 100% 0)',
-						      height:   0,
-						      opacity:  0 },
-					    open:   { clipPath: 'inset(0 0 0% 0)',
-						      height:   'auto',
-						      opacity:  1 } }}
-				initial="closed"
-				animate="open"
-				exit="closed"
-				transition={{ duration: .2, ease: 'easeOut' }}>
-			      {item.subMenu
-			       .filter (subItem => subItem.visible ?? true)
-			       .map ((subItem, j) => (
-				  'component' in subItem
-				  ? (
-				      <Fragment key={`sp-c-${ i }-${ j }`}>
-					{subItem.component}
-				      </Fragment>)
-				  : (
-				      <PrefetchLink
-					  key={`sp-l-${ i }-${ j }`}
-					  to={subItem.to}
-					  target={subItem.to.slice (0, 2) === '//'
-						  ? '_blank'
-						  : undefined}
-					  className="w-full min-h-[36px] flex items-center pl-12">
-					{subItem.name}
-				      </PrefetchLink>)))}
-			    </motion.div>)}
-		      </AnimatePresence>
-		    </Fragment>))}
-		<PrefetchLink
-		    to="/more"
-		    ref={(el: (HTMLAnchorElement | null)) => {
-		      itemsRef.current[visibleMenu.length] = el
-		    }}
-		    className={cn ('w-full min-h-[40px] flex items-center pl-8',
-				   ((openItemIdx < 0)
-				    && 'font-bold bg-yellow-50 dark:bg-red-950'))}>
-		  その他 &raquo;
-		</PrefetchLink>
-		<TopNavUser user={user} sp/>
-		<Separator/>
-	      </motion.div>)}
-	</AnimatePresence>
+			 {i === openItemIdx && (
+			     <div className="top-nav-submenu w-full">
+			       {item.subMenu
+				.filter (subItem => subItem.visible ?? true)
+				.map ((subItem, j) => (
+				   'component' in subItem
+				   ? (
+				       <Fragment key={`sp-c-${ i }-${ j }`}>
+					 {subItem.component}
+				       </Fragment>)
+				   : (
+				       <PrefetchLink
+					   key={`sp-l-${ i }-${ j }`}
+					   to={subItem.to}
+					   target={subItem.to.slice (0, 2) === '//'
+						   ? '_blank'
+						   : undefined}
+					   className="top-nav-mobile-row w-full min-h-[36px] flex items-center pl-12">
+					 {subItem.name}
+				       </PrefetchLink>)))}
+			     </div>)}
+		       </Fragment>))}
+		   <PrefetchLink
+		       to="/more"
+		       ref={(el: (HTMLAnchorElement | null)) => {
+			 itemsRef.current[visibleMenu.length] = el
+		       }}
+		       className={cn ('top-nav-mobile-row w-full min-h-[40px] flex items-center pl-8',
+				      ((openItemIdx < 0)
+				       && 'top-nav-mobile-active font-bold'))}>
+		     その他 &raquo;
+		   </PrefetchLink>
+		   <TopNavUser user={user} sp/>
+		   <Separator/>
+		 </div>))
+	 : (
+	     <AnimatePresence initial={false}>
+	       {menuOpen && (
+		   <motion.div
+		       key="spmenu"
+		       className={cn ('top-nav-root top-nav-mobile-menu flex flex-col md:hidden',
+				      'items-start')}
+		       variants={{ closed: { clipPath: 'inset(0 0 100% 0)',
+					     height:   0 },
+				   open:   { clipPath: 'inset(0 0 0% 0)',
+					     height:   'auto' } }}
+		       initial="closed"
+		       animate="open"
+		       exit="closed"
+		       transition={topNavTransition}>
+		     <Separator/>
+		     {visibleMenu.map ((item, i) => (
+			 <Fragment key={i}>
+			   <PrefetchLink
+			       to={i === openItemIdx ? item.to : '#'}
+			       className={cn ('top-nav-mobile-row w-full min-h-[40px] flex items-center pl-8',
+					  ((i === openItemIdx)
+					   && 'top-nav-mobile-active font-bold'))}
+			       onClick={(ev: MouseEvent<HTMLAnchorElement>) => {
+				 if (i !== openItemIdx)
+				   {
+				     ev.preventDefault ()
+				     setOpenItemIdx (i)
+				   }
+			       }}>
+			     {item.name}
+			   </PrefetchLink>
+
+			   <AnimatePresence initial={false}>
+			     {i === openItemIdx && (
+				 <motion.div
+				     key={`sp-sub-${ i }`}
+				     className="top-nav-submenu w-full"
+				     variants={{ closed: { clipPath: 'inset(0 0 100% 0)',
+							   height:   0,
+							   opacity:  0 },
+						 open:   { clipPath: 'inset(0 0 0% 0)',
+							   height:   'auto',
+							   opacity:  1 } }}
+				     initial="closed"
+				     animate="open"
+				     exit="closed"
+				     transition={topNavTransition}>
+				   {item.subMenu
+				    .filter (subItem => subItem.visible ?? true)
+				    .map ((subItem, j) => (
+				       'component' in subItem
+				       ? (
+					   <Fragment key={`sp-c-${ i }-${ j }`}>
+					     {subItem.component}
+					   </Fragment>)
+				       : (
+					   <PrefetchLink
+					       key={`sp-l-${ i }-${ j }`}
+					       to={subItem.to}
+					       target={subItem.to.slice (0, 2) === '//'
+						       ? '_blank'
+						       : undefined}
+					       className="top-nav-mobile-row w-full min-h-[36px] flex items-center pl-12">
+					     {subItem.name}
+					   </PrefetchLink>)))}
+				 </motion.div>)}
+			   </AnimatePresence>
+			 </Fragment>))}
+		     <PrefetchLink
+			 to="/more"
+			 ref={(el: (HTMLAnchorElement | null)) => {
+			   itemsRef.current[visibleMenu.length] = el
+			 }}
+			 className={cn ('top-nav-mobile-row w-full min-h-[40px] flex items-center pl-8',
+					((openItemIdx < 0)
+					 && 'top-nav-mobile-active font-bold'))}>
+		       その他 &raquo;
+		     </PrefetchLink>
+		     <TopNavUser user={user} sp/>
+		     <Separator/>
+		   </motion.div>)}
+	     </AnimatePresence>)}
      </>)
 }

@@ -20,4 +20,16 @@ describe ('TabGroup', () => {
    expect (screen.getByText ('Alpha')).toBeInTheDocument ()
    expect (screen.queryByText ('Beta')).not.toBeInTheDocument ()
  })
+
+  it ('renders tabs as buttons and shows the right addon', () => {
+    render (
+        <TabGroup rightAddon={<span>件数 20</span>}>
+          <Tab name="広場">Plaza</Tab>
+        </TabGroup>,
+    )
+
+    expect (screen.getByRole ('button', { name: '広場' })).toBeInTheDocument ()
+    expect (screen.queryByRole ('link', { name: '広場' })).not.toBeInTheDocument ()
+    expect (screen.getByText ('件数 20')).toBeInTheDocument ()
+  })
 })
@@ -7,12 +7,15 @@ type TabProps = { name:     string
 		  init?:    boolean
 		  children: React.ReactNode }

-type Props = { children: React.ReactNode }
+type Props = {
+    children:    React.ReactNode
+    rightAddon?: React.ReactNode
+}

 export const Tab = ({ children }: TabProps) => <>{children}</>


-const TabGroup: FC<Props> = ({ children }) => {
+const TabGroup: FC<Props> = ({ children, rightAddon }) => {
  const tabs = React.Children.toArray (children) as React.ReactElement<TabProps>[]

  const [current, setCurrent] = useState<number> (() => {
@@ -22,17 +25,27 @@ const TabGroup: FC<Props> = ({ children }) => {

  return (
      <div className="mt-4">
-	<div className="flex gap-4">
-	  {tabs.map ((tab, i) => (
-	      <a key={i}
-		 href="#"
-		 className={cn (i === current && 'font-bold')}
-		 onClick={ev => {
-		   ev.preventDefault ()
-		   setCurrent (i)
-		 }}>
-		{tab.props.name}
-	      </a>))}
+	<div className="flex items-center justify-between gap-4">
+	  <div className="flex min-w-0 gap-4">
+	    {tabs.map ((tab, i) => (
+		<button
+		   key={i}
+		   type="button"
+		   className={cn (
+		       'bg-transparent p-0 text-left text-[hsl(var(--theme-link))] hover:opacity-85',
+		       'focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring',
+		       i === current && 'font-bold',
+		   )}
+		   onClick={() => {
+		     setCurrent (i)
+		   }}>
+		  {tab.props.name}
+		</button>))}
+	  </div>
+	  {rightAddon && (
+	      <div className="shrink-0">
+		{rightAddon}
+	      </div>)}
 	</div>
 	<div className="mt-2">
 	  {tabs[current]}
@@ -26,7 +26,7 @@ describe ('TagInput', () => {
    await waitFor (() => {
      expect (api.apiGet).toHaveBeenCalledWith (
          '/tags/autocomplete',
-          { params: { q: '虹夏' } },
+          { params: { q: '虹夏', nico: '0' } },
      )
    })
    expect (setValue).toHaveBeenCalledWith ('ぼっち 虹夏')
@@ -41,4 +41,20 @@ describe ('TagInput', () => {
    expect (api.apiGet).not.toHaveBeenCalled ()
    expect (setValue).toHaveBeenCalledWith (' ')
  })
+
+  it ('sends nico=1 only when includeNico is true', async () => {
+    const setValue = vi.fn ()
+    api.apiGet.mockResolvedValueOnce ([buildTag ({ name: '虹夏', postCount: 2 })])
+
+    render (<TagInput value="" setValue={setValue} includeNico={true}/>)
+
+    fireEvent.change (screen.getByRole ('textbox'), { target: { value: '虹夏' } })
+
+    await waitFor (() => {
+      expect (api.apiGet).toHaveBeenCalledWith (
+          '/tags/autocomplete',
+          { params: { q: '虹夏', nico: '1' } },
+      )
+    })
+  })
 })
@@ -10,13 +10,20 @@ import type { Tag } from '@/types'


 type Props = {
+    includeNico?:   boolean
    describedBy?:  string
    invalid?:      boolean
    value:         string
    setValue:      (value: string) => void }


-const TagInput: FC<Props> = ({ describedBy, invalid, value, setValue }) => {
+const TagInput: FC<Props> = ({
+    includeNico = false,
+    describedBy,
+    invalid,
+    value,
+    setValue,
+}) => {
  const [activeIndex, setActiveIndex] = useState (-1)
  const [suggestions, setSuggestions] = useState<Tag[]> ([])
  const [suggestionsVsbl, setSuggestionsVsbl] = useState (false)
@@ -32,10 +39,12 @@ const TagInput: FC<Props> = ({ describedBy, invalid, value, setValue }) => {
 	return
      }

-    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: { q } })
-    setSuggestions (data.filter (t => t.postCount > 0))
-    if (suggestions.length > 0)
-      setSuggestionsVsbl (true)
+    const data = await apiGet<Tag[]> ('/tags/autocomplete', { params: {
+	q,
+	nico: includeNico ? '1' : '0' } })
+    const nextSuggestions = data.filter (t => t.postCount > 0)
+    setSuggestions (nextSuggestions)
+    setSuggestionsVsbl (nextSuggestions.length > 0)
  }

  // TODO: TagSearch からのコピペのため，共通化を考へる．
@@ -1,5 +1,7 @@
 import { motion } from 'framer-motion'

+import { clientAnimationTransition } from '@/lib/clientAnimation'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'

 import type { FC, ReactNode } from 'react'
@@ -9,12 +11,21 @@ type Props = {
    className?: string }


-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>)
+const MainArea: FC<Props> = ({ children, className }) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )

-export default MainArea
+  return (
+      <motion.main
+	  transition={{ layout: layoutTransition }}
+	  className={cn ('flex-1 overflow-y-auto p-4', className)}
+	  layout={animationMode === 'off' ? false : 'position'}>
+	{children}
+      </motion.main>)
+}
+
+export default MainArea
@@ -1,6 +1,8 @@
 import { motion } from 'framer-motion'
 import { Helmet } from 'react-helmet-async'

+import { clientAnimationTransition } from '@/lib/clientAnimation'
+import { useClientBehaviourSettings } from '@/lib/useClientBehaviourSettings'
 import { cn } from '@/lib/utils'

 import type { CSSProperties, FC, MouseEvent, PointerEvent, ReactNode } from 'react'
@@ -68,6 +70,12 @@ const SidebarComponent: FC<Props> = ({
    sidebarKey,
    side = 'left',
 }) => {
+  const behaviourSettings = useClientBehaviourSettings ()
+  const animationMode = behaviourSettings.animation ?? 'normal'
+  const layoutTransition = clientAnimationTransition (
+      animationMode,
+      { normal: { duration: .2, ease: 'easeOut' as const } },
+  )
  const rootRef = useRef<HTMLDivElement | null> (null)
  const maxWidthRef = useRef (maxWidth)
  const getContainerWidth = useCallback (() => {
@@ -305,8 +313,8 @@ const SidebarComponent: FC<Props> = ({
  return (
      <motion.div
 	  ref={rootRef}
-	  layout="position"
-	  transition={{ layout: { duration: .2, ease: 'easeOut' } }}
+	  layout={animationMode === 'off' ? false : 'position'}
+	  transition={{ layout: layoutTransition }}
 	  style={style}
 	  className={cn (
 	      'relative w-full md:w-[var(--sidebar-width)] md:shrink-0 md:h-full',
@@ -0,0 +1,198 @@
+import { useEffect, useMemo, useState } from 'react'
+
+import { Button } from '@/components/ui/button'
+import { toast } from '@/components/ui/use-toast'
+import { getClientBehaviorSettings, setClientBehaviorSettings } from '@/lib/settings'
+import { cn } from '@/lib/utils'
+
+import type { FC, ReactNode } from 'react'
+
+import type { ClientAnimationMode,
+	      ClientBehaviorSettings,
+	      ClientEmbedAutoLoadMode,
+	      ClientLinkPreloadMode,
+	      ClientTagRelationDisplayMode } from '@/lib/settings'
+
+type Props = {
+    sectionClassName: string
+    onDirtyStateChange?: (
+	dirty: boolean,
+	discard: () => void,
+    ) => void }
+
+type SegmentedOption<T extends string> = {
+    value: T
+    label: string }
+
+type SegmentedControlProps<T extends string> = {
+    value:     T
+    options:   SegmentedOption<T>[]
+    onChange:  (value: T) => void }
+
+type SettingBlockProps = {
+    title:        string
+    description?: string
+    children:     ReactNode }
+
+const animationOptions: SegmentedOption<ClientAnimationMode>[] = [
+    { value: 'off', label: 'なし' },
+    { value: 'reduced', label: '控えめ' },
+    { value: 'normal', label: '通常' }]
+
+const embedAutoLoadOptions: SegmentedOption<ClientEmbedAutoLoadMode>[] = [
+    { value: 'off', label: '読み込まない' },
+    { value: 'manual', label: 'クリック時' },
+    { value: 'auto', label: '自動' }]
+
+const linkPreloadOptions: SegmentedOption<ClientLinkPreloadMode>[] = [
+    { value: 'off', label: 'しない' },
+    { value: 'intent', label: 'する' }]
+
+const tagRelationDisplayOptions: SegmentedOption<ClientTagRelationDisplayMode>[] = [
+    { value: 'flat', label: 'まとめない' },
+    { value: 'grouped', label: 'まとめる' }]
+
+const SegmentedControl = <T extends string,> (
+    { value, options, onChange }: SegmentedControlProps<T>,
+) => {
+  return (
+      <div
+	  role="radiogroup"
+	  className="flex flex-wrap gap-2 rounded-xl border border-border bg-muted/40 p-1">
+	{options.map (option => (
+	    <button
+		key={option.value}
+		type="button"
+		role="radio"
+		aria-checked={value === option.value}
+		className={cn (
+		    'min-w-0 flex-1 rounded-lg px-3 py-2 text-sm font-medium',
+		    'transition-colors focus-visible:outline-none focus-visible:ring-2',
+		    'focus-visible:ring-ring focus-visible:ring-offset-2',
+		    value === option.value
+		    ? 'bg-primary text-primary-foreground shadow-sm ring-1 ring-primary/40'
+		    : 'bg-transparent text-muted-foreground hover:bg-background/70 hover:text-foreground',
+		)}
+		onClick={() => onChange (option.value)}>
+	      {option.label}
+	    </button>))}
+      </div>)
+}
+
+
+const SettingBlock: FC<SettingBlockProps> = (
+    { title, description, children },
+) => (
+    <div className="space-y-3 rounded-xl px-4">
+      <div className="space-y-1">
+	<h3 className="text-sm font-semibold">{title}</h3>
+	<p className="text-sm text-muted-foreground">{description}</p>
+      </div>
+      {children}
+    </div>)
+
+
+const BehaviourSettingsSection: FC<Props> = (
+    { sectionClassName,
+      onDirtyStateChange },
+) => {
+  const [savedSettings, setSavedSettings] =
+      useState<ClientBehaviorSettings> (() => getClientBehaviorSettings ())
+  const [draftSettings, setDraftSettings] =
+      useState<ClientBehaviorSettings> (() => getClientBehaviorSettings ())
+
+  useEffect (() => {
+    const current = getClientBehaviorSettings ()
+    setSavedSettings (current)
+    setDraftSettings (current)
+  }, [])
+
+  const hasUnsavedChanges = useMemo (
+      () => JSON.stringify (draftSettings) !== JSON.stringify (savedSettings),
+      [draftSettings, savedSettings])
+
+  const updateDraft = <Key extends keyof ClientBehaviorSettings,> (
+      key:    Key,
+      value:  ClientBehaviorSettings[Key],
+  ) => {
+    setDraftSettings (current => ({ ...current, [key]: value }))
+  }
+
+  const handleSave = () => {
+    const next = setClientBehaviorSettings (draftSettings)
+    setSavedSettings (next)
+    setDraftSettings (next)
+    toast ({ title: '動作設定を保存しました' })
+  }
+
+  const handleDiscard = () => {
+    setDraftSettings (savedSettings)
+  }
+
+  useEffect (() => {
+    onDirtyStateChange?.(hasUnsavedChanges, handleDiscard)
+
+    return () => {
+      onDirtyStateChange?.(false, () => { })
+    }
+  }, [handleDiscard, hasUnsavedChanges, onDirtyStateChange])
+
+  return (
+      <section className={sectionClassName}>
+	<div className="flex flex-wrap items-start justify-between gap-3">
+	  <div className="space-y-1">
+	    <h2 className="text-xl font-bold">動作</h2>
+	  </div>
+
+	  <div className="flex flex-wrap gap-2">
+	    <Button
+		type="button"
+		variant="destructive"
+		disabled={hasUnsavedChanges === false}
+		onClick={handleDiscard}>
+	      変更を破棄
+	    </Button>
+	    <Button
+		type="button"
+		disabled={hasUnsavedChanges === false}
+		onClick={handleSave}>
+	      保存
+	    </Button>
+	  </div>
+	</div>
+
+	<div className="space-y-4">
+	  <SettingBlock title="アニメーション">
+	    <SegmentedControl
+		value={draftSettings.animation ?? 'normal'}
+		options={animationOptions}
+		onChange={value => updateDraft ('animation', value)}/>
+	  </SettingBlock>
+
+	  <SettingBlock
+	      title="リンク先の先読み"
+	      description="マウスを置いた時点でリンク先のデータを取得します。">
+	    <SegmentedControl
+		value={draftSettings.linkPreload ?? 'intent'}
+		options={linkPreloadOptions}
+		onChange={value => updateDraft ('linkPreload', value)}/>
+	  </SettingBlock>
+
+	  <SettingBlock title="タグの親子関係表示">
+	    <SegmentedControl
+		value={draftSettings.tagRelationDisplay ?? 'grouped'}
+		options={tagRelationDisplayOptions}
+		onChange={value => updateDraft ('tagRelationDisplay', value)}/>
+	  </SettingBlock>
+
+	  <SettingBlock title="埋め込み自動読込">
+	    <SegmentedControl
+		value={draftSettings.embedAutoLoad ?? 'auto'}
+		options={embedAutoLoadOptions}
+		onChange={value => updateDraft ('embedAutoLoad', value)}/>
+	  </SettingBlock>
+	</div>
+      </section>)
+}
+
+export default BehaviourSettingsSection
@@ -0,0 +1,262 @@
+import { useEffect, useMemo, useState } from 'react'
+
+import { Button } from '@/components/ui/button'
+import { toast } from '@/components/ui/use-toast'
+import {
+    getConflictingShortcutActionIds,
+    formatKeyBinding,
+    isSpaceBinding,
+    keyBindingFromKeyboardEvent,
+    SHORTCUT_DEFINITIONS,
+    SHORTCUT_SCOPE_LABELS,
+} from '@/lib/keyboardShortcuts'
+import { getEffectiveKeyBindings } from '@/lib/settings'
+import { useKeyboardShortcutSettings } from '@/lib/useKeyboardShortcuts'
+
+import type { ShortcutActionId } from '@/lib/keyboardShortcuts'
+import type { ClientKeyboardSettings } from '@/lib/settings'
+import type { FC } from 'react'
+
+type Props = {
+    sectionClassName: string
+    onDirtyStateChange?: (
+	dirty: boolean,
+	discard: () => void,
+    ) => void
+}
+
+
+const KeyboardSettingsSection: FC<Props> = (
+    { sectionClassName,
+      onDirtyStateChange },
+) => {
+  const {
+      keyboardSettings,
+      saveKeyboardSettings,
+  } = useKeyboardShortcutSettings ()
+  const [capturingActionId, setCapturingActionId] =
+      useState<ShortcutActionId | null> (null)
+  const [draftKeyboardSettings, setDraftKeyboardSettings] =
+      useState<ClientKeyboardSettings> (keyboardSettings)
+
+  useEffect (() => {
+    setDraftKeyboardSettings (keyboardSettings)
+  }, [keyboardSettings])
+
+  const draftEffectiveBindings = useMemo (
+      () => getEffectiveKeyBindings (draftKeyboardSettings.bindings),
+      [draftKeyboardSettings.bindings],
+  )
+  const draftConflictActionIds = useMemo (
+      () => getConflictingShortcutActionIds (draftEffectiveBindings),
+      [draftEffectiveBindings],
+  )
+  const hasUnsavedChanges = useMemo (
+      () => JSON.stringify (draftKeyboardSettings) !== JSON.stringify (keyboardSettings),
+      [draftKeyboardSettings, keyboardSettings],
+  )
+
+  useEffect (() => {
+    if (capturingActionId == null)
+      return
+
+    const onKeyDown = (event: KeyboardEvent) => {
+      if (event.isComposing || event.key === 'Process')
+	return
+
+      event.preventDefault ()
+      event.stopPropagation ()
+
+      if (event.key === 'Escape')
+	{
+	  setCapturingActionId (null)
+	  return
+	}
+
+      if (event.key === 'Backspace' || event.key === 'Delete')
+	{
+	  setDraftKeyboardSettings (current => ({
+	      ...current,
+	      bindings: {
+		  ...(current.bindings ?? { }),
+		  [capturingActionId]: null,
+	      },
+	  }))
+	  setCapturingActionId (null)
+	  return
+	}
+
+      const binding = keyBindingFromKeyboardEvent (event)
+      if (binding == null)
+	return
+
+      if (isSpaceBinding (binding))
+	{
+	  toast ({ title: 'Space は今は割り当てられません．' })
+	  return
+	}
+
+      setDraftKeyboardSettings (current => ({
+	  ...current,
+	  bindings: {
+	      ...(current.bindings ?? { }),
+	      [capturingActionId]: binding,
+	  },
+      }))
+      setCapturingActionId (null)
+    }
+
+    document.addEventListener ('keydown', onKeyDown, true)
+    return () => document.removeEventListener ('keydown', onKeyDown, true)
+  }, [capturingActionId])
+
+  const rows = useMemo (() => SHORTCUT_DEFINITIONS.map (definition => ({
+      ...definition,
+      currentBinding:    draftEffectiveBindings[definition.id],
+      hasConflict:       draftConflictActionIds.has (definition.id),
+      hasCustomBinding:  Object.prototype.hasOwnProperty.call (
+	  draftKeyboardSettings.bindings ?? { },
+	  definition.id,
+      ),
+  })), [
+      draftConflictActionIds,
+      draftEffectiveBindings,
+      draftKeyboardSettings.bindings,
+  ])
+
+  const handleSave = () => {
+    saveKeyboardSettings (draftKeyboardSettings)
+    toast ({ title: 'キーボード設定を保存しました' })
+  }
+
+  const handleDiscard = () => {
+    setDraftKeyboardSettings (keyboardSettings)
+    setCapturingActionId (null)
+  }
+
+  useEffect (() => {
+    onDirtyStateChange?.(hasUnsavedChanges, handleDiscard)
+
+    return () => {
+      onDirtyStateChange?.(false, () => { })
+    }
+  }, [handleDiscard, hasUnsavedChanges, onDirtyStateChange])
+
+  return (
+      <section className={sectionClassName}>
+	<div className="flex flex-wrap items-start justify-between gap-3">
+	  <div className="space-y-1">
+	    <h2 className="text-xl font-bold">キーボード</h2>
+	  </div>
+
+	  <div className="flex flex-wrap gap-2">
+	    <Button
+		type="button"
+		variant="outline"
+		onClick={() => {
+		  setDraftKeyboardSettings (current => ({
+		      ...current,
+		      bindings: { },
+		  }))
+		}}>
+	      すべて既定に戻す
+	    </Button>
+	    <Button
+		type="button"
+		variant="destructive"
+		disabled={!(hasUnsavedChanges)}
+		onClick={handleDiscard}>
+	      変更を破棄
+	    </Button>
+	    <Button
+		type="button"
+		disabled={!(hasUnsavedChanges) || draftConflictActionIds.size > 0}
+		onClick={handleSave}>
+	      保存
+	    </Button>
+	  </div>
+	</div>
+
+	<label className="flex items-center gap-2 text-sm">
+	  <input
+	      type="checkbox"
+	      checked={draftKeyboardSettings.enabled !== false}
+	      onChange={event => {
+		setDraftKeyboardSettings (current => ({
+		    ...current,
+		    enabled: event.target.checked,
+		}))
+	      }}/>
+	  <span>キーボード・ショートカットを有効にする</span>
+	</label>
+
+	{capturingActionId != null && (
+	    <p className="text-sm text-muted-foreground">
+	      キー入力待ちです．Escape で取消し，Backspace / Delete で未割当にできます．
+	    </p>)}
+
+	<div className="overflow-x-auto">
+	  <table className="w-full min-w-[52rem] table-fixed border-collapse text-sm">
+	    <thead className="border-b border-border">
+	      <tr>
+		<th className="p-2 text-left">操作</th>
+		<th className="p-2 text-left">適用範囲</th>
+		<th className="p-2 text-left">現在のキー</th>
+		<th className="p-2 text-left"></th>
+		<th className="p-2 text-left"></th>
+		<th className="p-2 text-left">競合状態</th>
+	      </tr>
+	    </thead>
+	    <tbody>
+	      {rows.map (row => (
+		  <tr key={row.id} className="border-b border-border/60 last:border-b-0">
+		    <td className="p-2">{row.label}</td>
+		    <td className="p-2">{SHORTCUT_SCOPE_LABELS[row.scope]}</td>
+		    <td className="p-2 font-mono">
+		      {formatKeyBinding (row.currentBinding)}
+		    </td>
+		    <td className="p-2">
+		      <Button
+			  type="button"
+			  variant={capturingActionId === row.id ? 'default' : 'outline'}
+			  className="h-8"
+			  onClick={() => {
+			    setCapturingActionId (
+				capturingActionId === row.id ? null : row.id,
+			    )
+			  }}>
+			{capturingActionId === row.id ? '入力待ち…' : '変更'}
+		      </Button>
+		    </td>
+		    <td className="p-2">
+		      <Button
+			  type="button"
+			  variant="ghost"
+			  className="h-8"
+			  disabled={!(row.hasCustomBinding)}
+			  onClick={() => {
+			    setDraftKeyboardSettings (current => {
+				const nextBindings = { ...(current.bindings ?? { }) }
+				delete nextBindings[row.id]
+				return {
+				    ...current,
+				    bindings: nextBindings,
+				}
+			    })
+			  }}>
+			既定に戻す
+		      </Button>
+		    </td>
+		    <td className="p-2">
+		      {row.hasConflict
+		       ? <span className="text-red-600 dark:text-red-400">競合あり</span>
+		       : 'なし'}
+		    </td>
+		  </tr>))}
+	    </tbody>
+	  </table>
+	</div>
+      </section>)
+}
+
+export default KeyboardSettingsSection
@@ -0,0 +1,87 @@
+import {
+    Dialog,
+    DialogContent,
+    DialogDescription,
+    DialogHeader,
+    DialogTitle,
+} from '@/components/ui/dialog'
+import {
+    formatKeyBinding,
+    SHORTCUT_DEFINITIONS,
+    SHORTCUT_SCOPE_LABELS,
+} from '@/lib/keyboardShortcuts'
+
+import type {
+    KeyBinding,
+    ShortcutActionId,
+    ShortcutScope,
+} from '@/lib/keyboardShortcuts'
+import type { FC } from 'react'
+
+type Props = {
+    open:               boolean
+    onOpenChange:       (open: boolean) => void
+    activeScope:        ShortcutScope
+    effectiveBindings:  Record<ShortcutActionId, KeyBinding | null>
+    conflictActionIds:  Set<ShortcutActionId>
+    availableActionIds: Set<ShortcutActionId>
+}
+
+
+const ShortcutHelpDialog: FC<Props> = (
+    {
+	open,
+	onOpenChange,
+	activeScope,
+	effectiveBindings,
+	conflictActionIds,
+	availableActionIds,
+    },
+) => {
+  const rows = SHORTCUT_DEFINITIONS
+      .filter (definition =>
+	  definition.scope === 'global' || definition.scope === activeScope)
+      .filter (definition => availableActionIds.has (definition.id))
+
+  return (
+      <Dialog open={open} onOpenChange={onOpenChange}>
+	<DialogContent className="max-w-3xl px-6 pb-6 pt-7">
+	  <DialogHeader className="pl-8">
+	    <DialogTitle>キーボード・ショートカット</DialogTitle>
+	    <DialogDescription>
+	      この画面で利用できるショートカットを表示します。
+	    </DialogDescription>
+	  </DialogHeader>
+
+	  <div className="overflow-x-auto">
+	    <table className="w-full min-w-[40rem] table-fixed border-collapse text-sm">
+	      <thead className="border-b border-border">
+		<tr>
+		  <th className="p-2 text-left">操作</th>
+		  <th className="p-2 text-left">適用範囲</th>
+		  <th className="p-2 text-left">キー</th>
+		  <th className="p-2 text-left">競合</th>
+		</tr>
+	      </thead>
+	      <tbody>
+		{rows.map (row => (
+		    <tr key={row.id} className="border-b border-border/60 last:border-b-0">
+		      <td className="p-2">{row.label}</td>
+		      <td className="p-2">{SHORTCUT_SCOPE_LABELS[row.scope]}</td>
+		      <td className="p-2 font-mono">
+			{formatKeyBinding (effectiveBindings[row.id])}
+		      </td>
+		      <td className="p-2">
+			{conflictActionIds.has (row.id)
+			 ? <span className="text-red-600 dark:text-red-400">競合あり</span>
+			 : 'なし'}
+		      </td>
+		    </tr>))}
+	      </tbody>
+	    </table>
+	  </div>
+	</DialogContent>
+      </Dialog>)
+}
+
+export default ShortcutHelpDialog