feat: migrate workspace to shadcn sidebar and chat components

.hallmark/log.json

@@ -1,4 +1,12 @@
 [
+  {
+    "date": "2026-09-28",
+    "macrostructure": "sidebar-09 Workbench",
+    "theme": "shadcn base-nova neutral",
+    "scope": "app",
+    "enrichment": "none",
+    "brief": "Base UI icon rail and contextual sidebar with shadcn chat primitives and independent deck columns"
+  },
   {
     "date": "2026-09-24",
     "macrostructure": "Workbench",

.oxlintrc.json

@@ -0,0 +1,9 @@
+{
+  "$schema": "./node_modules/oxlint/configuration_schema.json",
+  "categories": { "correctness": "off" },
+  "jsPlugins": ["@shadcn/lint"],
+  "rules": {
+    "shadcn/no-raw-colors": "error"
+  },
+  "ignorePatterns": ["src/routeTree.gen.ts"]
+}

README.md

@@ -66,6 +66,9 @@ profiles; Mastodon credentials never go to the browser.
 nix develop -c pnpm dev
 nix develop -c pnpm dev:tailscale
 nix develop -c pnpm generate:e2e-openapi
+nix develop -c pnpm lint
+nix develop -c pnpm lint:ui
+nix develop -c pnpm typecheck
 nix develop -c pnpm knip
 nix develop -c pnpm test
 nix develop -c pnpm test:e2e
@@ -163,11 +166,31 @@ and `TWITTER_LITE_LIVE_QUERY` overrides the search text.
 
 ## Deck workspace
 
-The interface uses a full-height, dark TweetDeck-style workbench: a deck sidebar,
-compact column headers, and independently scrolling post columns. On narrow
-screens, the sidebar becomes a compact top bar. Add/edit forms open in native
-dialogs; Escape closes them and returns focus. Column menus contain editing,
-ordering, and deletion; refresh stays available directly in each header.
+The interface uses shadcn/ui's Base UI components and Tailwind CSS v4, with a
+collapsible sidebar based on
+[sidebar-09](https://github.com/shadcn-ui/ui/tree/98a1fe67b439324ddc857f47fbdce056600a4329/apps/v4/registry/bases/base/blocks/sidebar-09).
+The workspace retains compact column headers and independently scrolling post
+columns. On narrow screens, the sidebar opens as a sheet. Add/edit forms use
+shadcn dialogs with Escape handling and focus restoration. Column menus contain
+editing, ordering, and deletion; refresh stays available directly in each header.
+
+Shared UI components live in `src/components/ui`; `components.json` configures
+the registry and theme entrypoint. Chat uses MessageScroller, Message, Bubble,
+Marker and InputGroup while retaining the existing Codex transport and saved
+conversation model. The icon rail switches between chat and deck management;
+closing the mobile sheet or crossing the desktop breakpoint preserves chat
+drafts, selected accounts and live deck updates. Theme colors are declared in
+`src/ui.css`.
+
+`pnpm lint` runs Biome and the UI checks. `pnpm lint:ui` runs
+[@shadcn/lint](https://github.com/shadcn-ui/lint) through Oxlint. The
+`shadcn/no-raw-colors` rule in `.oxlintrc.json` requires theme colors in JSX and
+class helpers, including shared UI components. Layout values remain available
+for the sidebar and deck. Biome continues to handle formatting and general
+code checks. Knip checks application usage while retaining the public exports
+of registry components for composition. Additional design rules can be configured
+in `.oxlintrc.json`;
+see the [available rules](https://github.com/shadcn-ui/lint#rules).
 
 Create a deck for an investigation, then add columns for each perspective.
 Choose a connected account and one of its supported sources. Account

biome.json

@@ -8,9 +8,25 @@
       "!!**/test-results"
     ]
   },
-  "formatter": { "enabled": true, "indentStyle": "space" },
-  "linter": { "enabled": true, "rules": { "recommended": true } },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
   "javascript": {
-    "formatter": { "quoteStyle": "single", "semicolons": "asNeeded" }
+    "formatter": {
+      "quoteStyle": "single",
+      "semicolons": "asNeeded"
+    }
+  },
+  "css": {
+    "parser": {
+      "tailwindDirectives": true
+    }
   }
 }

components.json

@@ -0,0 +1,20 @@
+{
+  "$schema": "https://ui.shadcn.com/schema.json",
+  "style": "base-nova",
+  "rsc": false,
+  "tsx": true,
+  "tailwind": {
+    "config": "",
+    "css": "src/ui.css",
+    "baseColor": "neutral",
+    "cssVariables": true
+  },
+  "iconLibrary": "lucide",
+  "aliases": {
+    "components": "#/components",
+    "utils": "#/lib/utils",
+    "ui": "#/components/ui",
+    "lib": "#/lib",
+    "hooks": "#/hooks"
+  }
+}

docs/plans/2026-09-28-shadcn-ui.md

@@ -0,0 +1,54 @@
+# shadcn workspace migration
+
+## Target
+
+Replace the custom workspace UI with the Base UI version of shadcn sidebar-09
+at commit 98a1fe67b439324ddc857f47fbdce056600a4329. Preserve its icon rail,
+contextual second sidebar and SidebarInset. Adapt the rail to research chat and
+deck management, keeping the research panel mounted so SSE state remains live.
+On small screens, use the sidebar Sheet and keep all actions reachable.
+
+Use official MessageScroller, Message, Bubble and Marker for the existing Codex
+conversation. Keep transport, history, retry, stop, account selection, Markdown
+and citation navigation. Use shadcn primitives for forms, dialogs, menus and
+post metadata throughout the app. Use Tailwind v4 and shared shadcn semantic
+tokens; remove legacy control styles that override primitives.
+
+Install @shadcn/lint with an executable design-token policy alongside Biome.
+Update README and Nix dependency hash as needed.
+
+## Verification
+
+- Typecheck, Biome, design lint, unit suite, production build, unused-code check.
+- Browser integration suite: decks, source editing, connections, conversation,
+  citation navigation, menus and keyboard focus.
+- Render desktop plus 320/375/414/768 px: rail collapse, mobile Sheet, independent
+  column scrolling, chat composer visibility, no document horizontal overflow.
+- Inspect screenshots and run Axe on relevant states.
+
+## Status
+
+Completed on 2026-09-28.
+
+- SidebarProvider, nested icon/context Sidebars and SidebarInset now implement
+  the referenced sidebar-09 structure; the mobile Sheet keeps its content mounted.
+- Research state and deck-dialog drafts live above the responsive shell. Closing
+  or resizing the sidebar preserves drafts, selected accounts and retry identity.
+- MessageScroller, Message, Bubble/BubbleContent, Marker/MarkerContent, InputGroup
+  and Collapsible replace the chat UI. Markdown list markers and headings remain
+  visible after Tailwind's reset; citation highlighting uses theme tokens.
+- Forms, dialogs, dropdown menus, avatars, badges and empty states use Base UI
+  shadcn components. No backend transport, storage or access contracts changed.
+- @shadcn/lint runs in pnpm lint and rejects raw palette colors. Nix dependency
+  hash and README/deck docs are updated.
+
+Verification: 336 unit tests passed (one explicit live-relay test skipped), all
+56 desktop/mobile E2E tests passed. After the final isolated chat styling fixes,
+all 10 research E2E tests and 22 related unit tests passed again. Typecheck,
+Biome/design lint, Knip, production build and the Nix package build passed.
+Browser checks covered 320/375/414/768px, rendered chat and post screenshots,
+Axe, dialog focus restoration, breakpoint draft preservation and closed-sidebar
+SSE deck updates. Automated browser tests use mock relay/research data.
+A subsequent dev-server smoke check through the Tailscale HTTPS URL confirmed
+the real relay displayed 14 posts across six columns without UI alerts.
+No production deployment was performed.

docs/research-decks.md

@@ -2,12 +2,14 @@
 
 ## Workspace
 
-Both `/` and `/deck` render the deck-only application. A dark sidebar switches
-decks, adds columns, and jumps to a column. Up to six ordered columns scroll
-independently; only the active deck mounts and fetches its columns. On mobile,
-the sidebar becomes a compact top bar. Native dialogs handle creation and
-editing, with Escape and focus restoration. Column menus offer editing,
-ordering, and deletion; refresh and pagination are manual.
+Both `/` and `/deck` render the research workspace. A collapsible shadcn/ui
+sidebar based on `sidebar-09` switches between research chat and deck management.
+Deck management switches decks, adds columns, and manages connected accounts. Up to six ordered columns scroll independently; only the active deck
+mounts and fetches its columns. On mobile, the sidebar opens as a sheet.
+shadcn Base UI dialogs handle creation and editing, with Escape and focus
+restoration. Column menus offer editing, ordering, and deletion; refresh and
+pagination are manual. The adjacent chat uses MessageScroller, Message, Bubble,
+Marker and InputGroup with the existing research backend.
 
 Twitter and Mastodon can appear together, with different accounts in each
 column. Original-post links open their source site. Separate reader, search,

e2e/integrations/connections.test.ts

@@ -1,9 +1,11 @@
 import { expect, test } from '../fixtures'
+import { showDeckManagement } from '../workspace'
 
 test('opens account management after hydration without inheriting real OAuth configuration', async ({
   page,
 }) => {
   await page.goto('/')
+  await showDeckManagement(page)
   const manage = page.getByRole('button', { name: '接続アカウントを管理' })
   await expect(manage).toBeEnabled()
   await manage.click()
@@ -28,6 +30,7 @@ test('rejects an unbound OAuth callback without contacting an instance', async (
   await expect(page.getByRole('alert')).toContainText(
     'Mastodonの認可を完了できませんでした。',
   )
+  await showDeckManagement(page)
   await expect(
     page.getByRole('button', { name: '接続アカウントを管理' }),
   ).toBeEnabled()

e2e/integrations/deck.test.ts

@@ -1,5 +1,6 @@
 import type { Page } from '@playwright/test'
 import { expect, test } from '../fixtures'
+import { closeMobileSidebar, showDeckManagement } from '../workspace'
 
 async function addColumn(
   page: Page,
@@ -8,6 +9,7 @@ async function addColumn(
   profile = 'e2e',
   kind = 'search',
 ) {
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'カラムを追加', exact: true }).click()
   const editor = page.getByRole('form', { name: 'カラムを追加', exact: true })
   await editor.getByLabel('カラム名', { exact: true }).fill(title)
@@ -28,6 +30,7 @@ async function addColumn(
     )
     .fill(query)
   await editor.getByRole('button', { name: '追加して検索' }).click()
+  await closeMobileSidebar(page)
   await expect(
     page
       .getByRole('region', { name: title, exact: true })
@@ -44,7 +47,9 @@ test.beforeEach(async ({ page }) => {
   await page
     .getByRole('button', { name: 'デッキとして保存', exact: true })
     .click()
-  await expect(page.getByText('サーバーに保存・端末間で共有')).toHaveCount(1)
+  await showDeckManagement(page)
+  await expect(page.getByText('サーバーに保存・端末間で共有')).toBeVisible()
+  await closeMobileSidebar(page)
 })
 
 test('binds identical searches to independent profiles through paging, editing and reload', async ({
@@ -67,8 +72,8 @@ test('binds identical searches to independent profiles through paging, editing a
   await expect(
     second.getByText('alternate · Latest · all page 2'),
   ).toBeVisible()
-  await second.locator('summary[aria-label="別の接続の操作"]').click()
-  await second.getByRole('button', { name: '編集', exact: true }).click()
+  await second.getByRole('button', { name: '別の接続の操作' }).click()
+  await page.getByRole('menuitem', { name: '編集', exact: true }).click()
   await page
     .getByRole('combobox', { name: '接続プロファイル', exact: true })
     .selectOption({ label: 'e2e' })
@@ -93,25 +98,32 @@ test('creates, switches, renames and deletes persisted deck profiles', async ({
   await page.getByLabel('調査テーマ・デッキ名').fill('最初の調査')
   await page.getByRole('button', { name: '名前を保存' }).click()
   await addColumn(page, '最初の観点', 'first-deck')
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'デッキを作成', exact: true }).click()
   await page.getByLabel('新しいデッキ名').fill('別の調査')
   await page.getByRole('button', { name: '作成', exact: true }).click()
   await expect(page.locator('.deck-column')).toHaveCount(0)
   await addColumn(page, '別の観点', 'second-deck', 'alternate')
+  await showDeckManagement(page)
   await page
     .getByLabel('デッキプロファイル', { exact: true })
     .selectOption({ label: '最初の調査' })
+  await closeMobileSidebar(page)
   await expect(page.locator('.deck-column h2')).toHaveText(['最初の観点'])
   await page.reload()
   await expect(page.getByRole('heading', { level: 1 })).toHaveText('最初の調査')
+  await showDeckManagement(page)
   await page
     .getByLabel('デッキプロファイル', { exact: true })
     .selectOption({ label: '別の調査' })
+  await closeMobileSidebar(page)
   await expect(page.locator('.deck-column h2')).toHaveText(['別の観点'])
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'デッキを削除', exact: true }).click()
   await page.getByRole('button', { name: '削除する', exact: true }).click()
   await page.reload()
   await expect(page.getByRole('heading', { level: 1 })).toHaveText('最初の調査')
+  await showDeckManagement(page)
   await expect(
     page.getByLabel('デッキプロファイル', { exact: true }).locator('option'),
   ).toHaveCount(1)
@@ -128,14 +140,14 @@ test('reads user and list timelines within columns and reorders, deletes and res
   await expect(list.getByText('list page 1')).toBeVisible()
   await list.getByRole('button', { name: '続きを読み込む' }).click()
   await expect(list.getByText('list page 2')).toBeVisible()
-  await list.locator('summary[aria-label="リストの投稿の操作"]').click()
-  await list.getByRole('button', { name: 'リストの投稿を左へ' }).click()
+  await list.getByRole('button', { name: 'リストの投稿の操作' }).click()
+  await page.getByRole('menuitem', { name: 'リストの投稿を左へ' }).click()
   await expect(page.locator('.deck-column h2')).toHaveText([
     'リストの投稿',
     'アカウント',
   ])
-  await list.locator('summary[aria-label="リストの投稿の操作"]').click()
-  await list.getByRole('button', { name: 'リストの投稿を削除' }).click()
+  await list.getByRole('button', { name: 'リストの投稿の操作' }).click()
+  await page.getByRole('menuitem', { name: 'リストの投稿を削除' }).click()
   await page.getByRole('button', { name: '元に戻す' }).click()
   await expect(page.locator('.deck-column h2')).toHaveText([
     'リストの投稿',
@@ -200,6 +212,7 @@ test('keeps the deck and editor accessible within narrow viewports', async ({
     path: testInfo.outputPath('deck-populated.png'),
     fullPage: true,
   })
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'カラムを追加', exact: true }).click()
   expect((await a11y().analyze()).violations).toEqual([])
   await page.screenshot({
@@ -211,12 +224,17 @@ test('keeps the deck and editor accessible within narrow viewports', async ({
 test('closes the column editor with Escape and restores focus without applying edits', async ({
   page,
 }) => {
+  await showDeckManagement(page)
   const opener = page.getByRole('button', { name: 'カラムを追加', exact: true })
   await opener.click()
-  await expect(page.getByRole('dialog')).toBeVisible()
+  await expect(
+    page.getByRole('dialog', { name: 'カラムを追加', exact: true }),
+  ).toBeVisible()
   await page.getByLabel('カラム名', { exact: true }).fill('キャンセルする観点')
   await page.keyboard.press('Escape')
-  await expect(page.getByRole('dialog')).toHaveCount(0)
+  await expect(
+    page.getByRole('dialog', { name: 'カラムを追加', exact: true }),
+  ).toHaveCount(0)
   await expect(opener).toBeFocused()
   await expect(page.locator('.deck-column')).toHaveCount(0)
   await opener.click()
@@ -239,6 +257,7 @@ test('does not overwrite unreadable storage on reload', async ({ page }) => {
 test('selects a list from the column profile catalog and refreshes it on profile change', async ({
   page,
 }) => {
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'カラムを追加', exact: true }).click()
   await page.getByLabel('カラム名', { exact: true }).fill('購読リスト')
   await page
@@ -263,6 +282,7 @@ test('selects a list from the column profile catalog and refreshes it on profile
     '1234567890',
   )
   await page.getByRole('button', { name: '追加して検索' }).click()
+  await closeMobileSidebar(page)
   await expect(
     page
       .getByRole('region', { name: '購読リスト', exact: true })
@@ -347,11 +367,15 @@ test('imports old browser decks explicitly and avoids duplicate imports after re
     legacy,
   )
   await page.reload()
+  await showDeckManagement(page)
   const selector = page.getByLabel('デッキプロファイル', { exact: true })
   await expect(selector.locator('option')).toHaveCount(1)
+  await closeMobileSidebar(page)
   await page.getByRole('button', { name: '旧デッキを取り込む' }).click()
+  await showDeckManagement(page)
   await expect(selector.locator('option')).toHaveCount(2)
   await selector.selectOption({ label: '以前の調査' })
+  await closeMobileSidebar(page)
   await expect(
     page.getByText('Latest · all page 1', { exact: true }),
   ).toBeVisible()
@@ -368,5 +392,29 @@ test('imports old browser decks explicitly and avoids duplicate imports after re
   await expect(
     page.getByRole('button', { name: '旧デッキを取り込む' }),
   ).toHaveCount(0)
+  await showDeckManagement(page)
   await expect(selector.locator('option')).toHaveCount(2)
 })
+
+test('preserves a new deck dialog and its draft across the mobile breakpoint', async ({
+  page,
+}) => {
+  await showDeckManagement(page)
+  await page.getByRole('button', { name: 'デッキを作成', exact: true }).click()
+  const dialog = page.getByRole('dialog', { name: 'デッキを作成', exact: true })
+  await dialog.getByLabel('新しいデッキ名').fill('画面を回転しても残る調査')
+  for (const width of [1024, 375, 1024]) {
+    await page.setViewportSize({ width, height: 900 })
+    await expect(dialog).toHaveCount(1)
+    await expect(dialog).toBeVisible()
+    await expect(dialog.getByLabel('新しいデッキ名')).toHaveValue(
+      '画面を回転しても残る調査',
+    )
+    await expect(page.locator('#new-deck-title')).toHaveCount(1)
+  }
+  await dialog.getByRole('button', { name: '作成', exact: true }).click()
+  await expect(dialog).toHaveCount(0)
+  await expect(page.getByRole('heading', { level: 1 })).toHaveText(
+    '画面を回転しても残る調査',
+  )
+})

e2e/integrations/research.test.ts

@@ -1,6 +1,11 @@
 import type { DeckColumn } from '../../src/features/decks/model'
 import type { ResearchRun } from '../../src/features/research/model'
 import { expect, test } from '../fixtures'
+import {
+  closeMobileSidebar,
+  showDeckManagement,
+  showResearch,
+} from '../workspace'
 
 test('pushes the current research snapshot on each SSE connection', async ({
   page,
@@ -37,6 +42,7 @@ test('restores the conversation and growing temporary deck from reconnect snapsh
   page,
 }) => {
   await page.goto('/')
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'カラムを追加', exact: true }).click()
   const accounts = page.getByRole('combobox', {
     name: '接続プロファイル',
@@ -45,9 +51,11 @@ test('restores the conversation and growing temporary deck from reconnect snapsh
   await accounts.selectOption({ label: 'e2e' })
   const connectionId = await accounts.inputValue()
   await page.keyboard.press('Escape')
+  await closeMobileSidebar(page)
   const run: ResearchRun = {
     id: '36ad8cc7-318c-46ae-94fa-28d30336f027',
     threadId: 'conversation-test',
+    connectionIds: [connectionId],
     topic: '既存の観点を使って調査して',
     status: 'running',
     startedAt: Date.now(),
@@ -89,10 +97,14 @@ test('restores the conversation and growing temporary deck from reconnect snapsh
     }),
   )
   await page.reload()
+  await showResearch(page)
   const conversation = page.getByRole('log', { name: '調査の会話' })
   await expect(conversation).toContainText('既存の観点を使って調査して')
   await expect(conversation).toContainText('list_decks: 完了')
   await expect(conversation).toContainText('既存の検索条件を再利用しています。')
+  await expect(
+    conversation.locator('[data-slot="bubble-content"]'),
+  ).not.toHaveCSS('background-color', 'rgba(0, 0, 0, 0)')
   await expect(page.locator('.deck-column h2')).toHaveText(['最初の観点'])
   run.deckVersion = 2
   run.status = 'complete'
@@ -114,19 +126,79 @@ test('restores the conversation and growing temporary deck from reconnect snapsh
     },
   })
   await page.reload()
+  await showResearch(page)
   await expect(conversation).toContainText('既存の観点を使って調査して')
   await expect(conversation).toContainText('比較する観点を追加しました。')
   await expect(page.locator('.deck-column h2')).toHaveText([
     '最初の観点',
     '比較の観点',
   ])
+  await closeMobileSidebar(page)
   await expect(
     page.getByRole('button', { name: 'デッキとして保存', exact: true }),
   ).toBeEnabled()
+  await showResearch(page)
+  const accountPicker = page.getByRole('button', {
+    name: '接続アカウント · 1件',
+  })
+  await accountPicker.click()
+  await expect(accountPicker).toHaveAttribute('aria-expanded', 'true')
+  await expect(
+    page.getByRole('checkbox', { name: 'e2e · Twitter' }),
+  ).toBeChecked()
+  await accountPicker.click()
+  await expect(accountPicker).toHaveAttribute('aria-expanded', 'false')
   await page.getByLabel('メッセージ', { exact: true }).fill('この観点を詳しく')
   await expect(
     page.getByRole('button', { name: '送信', exact: true }),
   ).toBeEnabled()
+  await page
+    .getByRole('button', { name: 'サイドバーを閉じる', exact: true })
+    .click()
+  run.deckVersion = 3
+  if (run.deck) run.deck.title = '閉じている間に更新された調査'
+  await expect(page.getByRole('heading', { level: 1 })).toHaveText(
+    '閉じている間に更新された調査',
+    { timeout: 15000 },
+  )
+  await showResearch(page)
+  await expect(page.getByLabel('メッセージ', { exact: true })).toHaveValue(
+    'この観点を詳しく',
+  )
+  await page.setViewportSize({ width: 600, height: 900 })
+  await expect(
+    page.locator('[data-sidebar="sidebar"][data-mobile="true"]'),
+  ).toHaveCount(1)
+  await showResearch(page)
+  await expect(page.getByLabel('メッセージ', { exact: true })).toHaveValue(
+    'この観点を詳しく',
+  )
+  await page.getByRole('button', { name: '接続アカウント · 1件' }).click()
+  await page.getByRole('checkbox', { name: 'e2e · Twitter' }).uncheck()
+  await page.setViewportSize({ width: 1100, height: 900 })
+  await expect(
+    page.locator('[data-sidebar="sidebar"][data-mobile="true"]'),
+  ).toHaveCount(0)
+  await showResearch(page)
+  await expect(page.getByLabel('メッセージ', { exact: true })).toHaveValue(
+    'この観点を詳しく',
+  )
+  await page.getByRole('button', { name: '接続アカウント · 0件' }).click()
+  await expect(
+    page.getByRole('checkbox', { name: 'e2e · Twitter' }),
+  ).not.toBeChecked()
+  await page.setViewportSize({ width: 600, height: 900 })
+  await expect(
+    page.locator('[data-sidebar="sidebar"][data-mobile="true"]'),
+  ).toHaveCount(1)
+  await showResearch(page)
+  await expect(page.getByLabel('メッセージ', { exact: true })).toHaveValue(
+    'この観点を詳しく',
+  )
+  await page.getByRole('button', { name: '接続アカウント · 0件' }).click()
+  await expect(
+    page.getByRole('checkbox', { name: 'e2e · Twitter' }),
+  ).not.toBeChecked()
 })
 
 test('rejects a different tailnet owner at the SSE endpoint', async ({
@@ -144,6 +216,7 @@ test('renders Markdown and reveals an unloaded citation in an offscreen deck col
 }) => {
   await page.emulateMedia({ reducedMotion: 'reduce' })
   await page.goto('/')
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'カラムを追加', exact: true }).click()
   const accounts = page.getByRole('combobox', {
     name: '接続プロファイル',
@@ -152,6 +225,7 @@ test('renders Markdown and reveals an unloaded citation in an offscreen deck col
   await accounts.selectOption({ label: 'e2e' })
   const connectionId = await accounts.inputValue()
   await page.keyboard.press('Escape')
+  await closeMobileSidebar(page)
   const source: DeckColumn = {
     id: 'citation-column-2',
     title: '引用の観点',
@@ -213,8 +287,14 @@ test('renders Markdown and reveals an unloaded citation in an offscreen deck col
     }),
   )
   await page.reload()
+  await showResearch(page)
   const chat = page.getByRole('log', { name: '調査の会話' })
   await expect(chat.getByRole('heading', { name: '調査結果' })).toBeVisible()
+  await expect(chat.getByRole('heading', { name: '調査結果' })).toHaveCSS(
+    'font-weight',
+    '600',
+  )
+  await expect(chat.locator('ul')).toHaveCSS('list-style-type', 'disc')
   await expect(
     chat.locator('strong').filter({ hasText: '重要な発見' }),
   ).toBeVisible()
@@ -246,6 +326,7 @@ test('explains unconfigured Codex and prevents starting research without affecti
   const heading = page.getByRole('heading', { level: 1 })
   await expect(heading).toBeVisible()
   const originalTitle = await heading.textContent()
+  await showResearch(page)
   const panel = page.getByRole('complementary', { name: '調査チャット' })
   await expect(panel).toBeVisible()
   await expect(
@@ -257,10 +338,14 @@ test('explains unconfigured Codex and prevents starting research without affecti
   await expect(panel.getByLabel('メッセージ', { exact: true })).toBeDisabled()
   const accessibility = await a11y().analyze()
   expect(accessibility.violations).toEqual([])
+  await closeMobileSidebar(page)
   await expect(heading).toHaveText(originalTitle ?? '')
+  await showDeckManagement(page)
   await page.getByRole('button', { name: 'デッキを作成', exact: true }).click()
   await page.getByLabel('新しいデッキ名').fill('手動の調査')
   await page.getByRole('button', { name: '作成', exact: true }).click()
+  await closeMobileSidebar(page)
   await expect(heading).toHaveText('手動の調査')
+  await showResearch(page)
   await expect(panel).toBeVisible()
 })

e2e/integrations/webmcp.test.ts

@@ -117,12 +117,9 @@ test('creates temporary research, edits it, persists explicitly and reopens it o
   ).toBeVisible()
   await page
     .getByRole('region', { name: '日本語', exact: true })
-    .locator('summary')
-    .click()
-  await page
-    .getByRole('region', { name: '日本語', exact: true })
-    .getByRole('button', { name: '編集', exact: true })
+    .getByRole('button', { name: '日本語の操作' })
     .click()
+  await page.getByRole('menuitem', { name: '編集', exact: true }).click()
   const replaced = await executeTool(page, 'set_deck', {
     deckId: deck.id,
     title: '更新した調査',

e2e/integrations/workspace.test.ts

@@ -0,0 +1,41 @@
+import { expect, test } from '../fixtures'
+import { closeMobileSidebar, showResearch } from '../workspace'
+
+test('keeps the sidebar, composer and deck reachable at compact widths', async ({
+  page,
+  a11y,
+}, testInfo) => {
+  await page.goto('/')
+  for (const width of [320, 375, 414, 768]) {
+    await page.setViewportSize({ width, height: 850 })
+    await showResearch(page)
+    const chat = page.getByRole('complementary', { name: '調査チャット' })
+    await expect(chat).toBeVisible()
+    const composer = chat.getByRole('textbox', {
+      name: 'メッセージ',
+      exact: true,
+    })
+    await expect(composer).toBeVisible()
+    const bounds = await composer.boundingBox()
+    if (!bounds) throw new Error('Composer must have a visible bounding box')
+    expect(bounds.x).toBeGreaterThanOrEqual(0)
+    expect(bounds.x + bounds.width).toBeLessThanOrEqual(width)
+    expect(bounds.y + bounds.height).toBeLessThanOrEqual(850)
+    expect(
+      await page.evaluate(() => document.documentElement.scrollWidth),
+    ).toBe(width)
+    await page.screenshot({
+      path: testInfo.outputPath(`workspace-${width}.png`),
+    })
+    if (width === 320) expect((await a11y().analyze()).violations).toEqual([])
+    await closeMobileSidebar(page)
+  }
+  await page.getByRole('button', { name: 'サイドバーを切り替え' }).click()
+  await expect(
+    page.getByRole('complementary', { name: '調査チャット' }),
+  ).toBeHidden()
+  await page.getByRole('button', { name: '調査チャット', exact: true }).click()
+  await expect(
+    page.getByRole('complementary', { name: '調査チャット' }),
+  ).toBeVisible()
+})

e2e/workspace.ts

@@ -0,0 +1,39 @@
+import { expect, type Page } from '@playwright/test'
+
+export async function showDeckManagement(page: Page) {
+  await expect(
+    page.getByRole('button', { name: '名前を変更', includeHidden: true }),
+  ).toBeEnabled()
+  const navigation = page.getByRole('button', {
+    name: 'デッキ管理',
+    exact: true,
+  })
+  if (!(await navigation.isVisible())) {
+    await page.getByRole('button', { name: 'サイドバーを切り替え' }).click()
+  }
+  await navigation.click()
+}
+
+export async function showResearch(page: Page) {
+  await expect(
+    page.getByRole('button', { name: '名前を変更', includeHidden: true }),
+  ).toBeEnabled()
+  const navigation = page.getByRole('button', {
+    name: '調査チャット',
+    exact: true,
+  })
+  if (!(await navigation.isVisible())) {
+    await page.getByRole('button', { name: 'サイドバーを切り替え' }).click()
+  }
+  await navigation.click()
+}
+
+export async function closeMobileSidebar(page: Page) {
+  const sheet = page.locator('[data-mobile="true"][data-sidebar="sidebar"]')
+  if (await sheet.isVisible()) {
+    await page
+      .getByRole('button', { name: 'サイドバーを閉じる', exact: true })
+      .click()
+    await expect(sheet).toBeHidden()
+  }
+}

flake.nix

@@ -22,7 +22,7 @@
             inherit (finalAttrs) pname version src;
             pnpm = pkgs.pnpm_11;
             fetcherVersion = 4;
-            hash = "sha256-dV9yHImzYzkwE5ZK75zWLkpJ5+V0Rvqg8/zC0zRw76I=";
+            hash = "sha256-+DqNt+58TrI0W8SU//JNdYYJtCdKNIG7gfWRxno36QQ=";
           };
 
           nativeBuildInputs = with pkgs; [

package.json

@@ -12,7 +12,12 @@
     ],
     "ignore": [
       "e2e/generated/**"
-    ]
+    ],
+    "ignoreIssues": {
+      "src/components/ui/**": [
+        "exports"
+      ]
+    }
   },
   "imports": {
     "#/*": "./src/*"
@@ -29,28 +34,36 @@
     "build": "vite build && node scripts/build-tools.mjs",
     "start": "HOST=127.0.0.1 node .output/server/index.mjs",
     "typecheck": "tsc --noEmit",
-    "lint": "biome check .",
+    "lint": "biome check . && pnpm lint:ui",
     "knip": "knip",
     "format": "biome check --write .",
     "test": "vitest run",
     "test:watch": "vitest",
     "test:e2e": "playwright test",
-    "test:live": "TWITTER_LITE_LIVE=1 vitest run tests/live/relay.test.ts"
+    "test:live": "TWITTER_LITE_LIVE=1 vitest run tests/live/relay.test.ts",
+    "lint:ui": "oxlint src"
   },
   "dependencies": {
+    "@base-ui/react": "1.8.0",
+    "@shadcn/react": "^0.3.1",
     "@tanstack/react-query": "5.101.2",
     "@tanstack/react-router": "1.170.17",
     "@tanstack/react-router-ssr-query": "1.167.1",
     "@tanstack/react-start": "1.168.27",
     "@yuta/bird": "0.10.1",
     "better-sqlite3": "13.0.3",
+    "class-variance-authority": "0.7.1",
+    "cn": "^0.4.0",
     "drizzle-orm": "0.45.3",
+    "lucide-react": "1.48.0",
     "nitro": "3.0.260610-beta",
     "react": "19.2.7",
     "react-dom": "19.2.7",
     "react-markdown": "10.1.0",
     "remark-gfm": "4.0.1",
     "sanitize-html": "2.17.7",
+    "shadcn": "4.21.0",
+    "tw-animate-css": "1.4.0",
     "usewebmcp": "5.1.0",
     "zod": "4.4.3"
   },
@@ -58,6 +71,8 @@
     "@axe-core/playwright": "4.11.1",
     "@biomejs/biome": "2.5.3",
     "@playwright/test": "1.61.1",
+    "@shadcn/lint": "^0.2.0",
+    "@tailwindcss/vite": "^4.3.3",
     "@testing-library/dom": "10.4.1",
     "@testing-library/jest-dom": "6.9.1",
     "@testing-library/react": "16.3.2",
@@ -71,6 +86,8 @@
     "jsdom": "29.1.1",
     "knip": "6.27.0",
     "orval": "8.24.0",
+    "oxlint": "^1.85.0",
+    "tailwindcss": "^4.3.3",
     "tsx": "4.23.12",
     "typescript": "7.0.2",
     "vite": "8.1.4",

src/components/app-shell.tsx

@@ -1,21 +1,149 @@
-export function AppShell({
-  sidebar,
-  researchChat,
-  children,
-}: {
-  sidebar: React.ReactNode
-  researchChat: React.ReactNode
-  children: React.ReactNode
-}) {
+import { Columns3, MessageSquare, PanelLeftClose, Search } from 'lucide-react'
+import { type CSSProperties, type ReactNode, useState } from 'react'
+import {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupContent,
+  SidebarHeader,
+  SidebarInset,
+  SidebarMenu,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarProvider,
+  SidebarTrigger,
+  useSidebar,
+} from '#/components/ui/sidebar'
+import { TooltipProvider } from '#/components/ui/tooltip'
+
+type ShellProps = {
+  sidebar: ReactNode
+  researchChat: (closeMobileSidebar: () => void) => ReactNode
+  children: ReactNode
+}
+
+export function AppShell(props: ShellProps) {
   return (
-    <main className="app app-deck">
-      {researchChat}
-      <section className="reader">
-        <section className="deck-toolbar" aria-label="デッキ管理">
-          {sidebar}
+    <TooltipProvider delay={800}>
+      <SidebarProvider
+        className="workspace h-dvh min-h-0 overflow-hidden"
+        style={{ '--sidebar-width': '25rem' } as CSSProperties}
+      >
+        <Workspace {...props} />
+      </SidebarProvider>
+    </TooltipProvider>
+  )
+}
+
+function Workspace({ sidebar, researchChat, children }: ShellProps) {
+  const [panel, setPanel] = useState<'chat' | 'decks'>('chat')
+  const { setOpen, setOpenMobile, isMobile } = useSidebar()
+  const navigation = [
+    { id: 'chat', title: '調査チャット', icon: MessageSquare },
+    { id: 'decks', title: 'デッキ管理', icon: Columns3 },
+  ] as const
+
+  return (
+    <>
+      <Sidebar
+        collapsible="icon"
+        className="overflow-hidden *:data-[sidebar=sidebar]:flex-row"
+      >
+        <Sidebar
+          collapsible="none"
+          className="w-[calc(var(--sidebar-width-icon)+1px)]! shrink-0 border-r"
+        >
+          <SidebarHeader>
+            <div
+              className="flex size-8 items-center justify-center rounded-lg bg-sidebar-primary text-sidebar-primary-foreground"
+              role="img"
+              aria-label="Twitter Lite"
+            >
+              <Search className="size-4" aria-hidden="true" />
+            </div>
+          </SidebarHeader>
+          <SidebarContent>
+            <SidebarGroup>
+              <SidebarGroupContent>
+                <SidebarMenu>
+                  {navigation.map((item) => (
+                    <SidebarMenuItem key={item.id}>
+                      <SidebarMenuButton
+                        aria-label={item.title}
+                        tooltip={{ children: item.title, hidden: false }}
+                        isActive={panel === item.id}
+                        onClick={() => {
+                          setPanel(item.id)
+                          if (isMobile) setOpenMobile(true)
+                          else setOpen(true)
+                        }}
+                        className="px-2"
+                      >
+                        <item.icon />
+                        <span className="sr-only">{item.title}</span>
+                      </SidebarMenuButton>
+                    </SidebarMenuItem>
+                  ))}
+                </SidebarMenu>
+              </SidebarGroupContent>
+            </SidebarGroup>
+          </SidebarContent>
+          <SidebarFooter>
+            <SidebarMenu>
+              <SidebarMenuItem>
+                <SidebarMenuButton
+                  aria-label="サイドバーを閉じる"
+                  tooltip="サイドバーを閉じる"
+                  onClick={() =>
+                    isMobile ? setOpenMobile(false) : setOpen(false)
+                  }
+                >
+                  <PanelLeftClose />
+                </SidebarMenuButton>
+              </SidebarMenuItem>
+            </SidebarMenu>
+          </SidebarFooter>
+        </Sidebar>
+        <Sidebar
+          collapsible="none"
+          className="min-w-0 flex-1 group-data-[collapsible=icon]:hidden"
+        >
+          <div
+            className={
+              panel === 'chat' ? 'flex min-h-0 flex-1 flex-col' : 'hidden'
+            }
+          >
+            {researchChat(() => setOpenMobile(false))}
+          </div>
+          <section
+            aria-label="デッキ管理"
+            className={
+              panel === 'decks'
+                ? 'flex min-h-0 flex-1 flex-col overflow-y-auto p-4'
+                : 'hidden'
+            }
+          >
+            <h2 className="mb-4 text-base font-semibold">デッキ</h2>
+            <div className="flex flex-col gap-4">{sidebar}</div>
+          </section>
+        </Sidebar>
+      </Sidebar>
+      <SidebarInset className="min-w-0 overflow-hidden">
+        <header className="flex h-12 shrink-0 items-center gap-2 border-b px-3">
+          <SidebarTrigger aria-label="サイドバーを切り替え" />
+          <span className="text-sm font-medium">Twitter Lite</span>
+          <span className="ml-auto text-xs text-muted-foreground">
+            調査ワークスペース
+          </span>
+        </header>
+        <section
+          className="reader flex min-h-0 min-w-0 flex-1 flex-col"
+          aria-label="デッキ"
+        >
+          {children}
         </section>
-        {children}
-      </section>
-    </main>
+      </SidebarInset>
+    </>
   )
 }

src/components/dialog.tsx

@@ -1,5 +1,12 @@
-import { useEffect, useId, useRef } from 'react'
 import { Icon } from './icon'
+import { Button } from './ui/button'
+import {
+  DialogClose,
+  DialogContent,
+  DialogHeader,
+  Dialog as DialogRoot,
+  DialogTitle,
+} from './ui/dialog'
 
 export function Dialog({
   title,
@@ -10,42 +17,35 @@ export function Dialog({
   onClose: () => void
   children: React.ReactNode
 }) {
-  const dialog = useRef<HTMLDialogElement>(null)
-  const headingId = useId()
-  useEffect(() => {
-    const element = dialog.current
-    const opener =
-      document.activeElement instanceof HTMLElement
-        ? document.activeElement
-        : null
-    element?.showModal()
-    return () => {
-      element?.close()
-      if (opener?.isConnected) opener.focus({ preventScroll: true })
-    }
-  }, [])
   return (
-    <dialog
-      ref={dialog}
-      className="deck-dialog"
-      aria-labelledby={headingId}
-      onCancel={(event) => {
-        event.preventDefault()
-        onClose()
+    <DialogRoot
+      open
+      onOpenChange={(open) => {
+        if (!open) onClose()
       }}
     >
-      <div className="dialog-heading">
-        <h2 id={headingId}>{title}</h2>
-        <button
-          type="button"
-          className="icon-button"
-          aria-label="閉じる"
-          onClick={onClose}
+      <DialogContent
+        showCloseButton={false}
+        className="max-h-[calc(100dvh-2rem)] overflow-y-auto"
+        aria-describedby={undefined}
+      >
+        <DialogHeader>
+          <DialogTitle>{title}</DialogTitle>
+        </DialogHeader>
+        <DialogClose
+          render={
+            <Button
+              variant="ghost"
+              size="icon-sm"
+              className="absolute right-2 top-2"
+              aria-label="閉じる"
+            />
+          }
         >
           <Icon name="close" />
-        </button>
-      </div>
-      {children}
-    </dialog>
+        </DialogClose>
+        {children}
+      </DialogContent>
+    </DialogRoot>
   )
 }

src/components/ui/avatar.tsx

@@ -0,0 +1,106 @@
+import { Avatar as AvatarPrimitive } from '@base-ui/react/avatar'
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function Avatar({
+  className,
+  size = 'default',
+  ...props
+}: AvatarPrimitive.Root.Props & {
+  size?: 'default' | 'sm' | 'lg'
+}) {
+  return (
+    <AvatarPrimitive.Root
+      data-slot="avatar"
+      data-size={size}
+      className={cn(
+        'group/avatar relative flex size-8 shrink-0 rounded-full select-none after:absolute after:inset-0 after:rounded-full after:border after:border-border after:mix-blend-darken data-[size=lg]:size-10 data-[size=sm]:size-6 dark:after:mix-blend-lighten',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarImage({ className, ...props }: AvatarPrimitive.Image.Props) {
+  return (
+    <AvatarPrimitive.Image
+      data-slot="avatar-image"
+      className={cn(
+        'aspect-square size-full rounded-full object-cover',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarFallback({
+  className,
+  ...props
+}: AvatarPrimitive.Fallback.Props) {
+  return (
+    <AvatarPrimitive.Fallback
+      data-slot="avatar-fallback"
+      className={cn(
+        'flex size-full items-center justify-center rounded-full bg-muted text-sm text-muted-foreground group-data-[size=sm]/avatar:text-xs',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarBadge({ className, ...props }: React.ComponentProps<'span'>) {
+  return (
+    <span
+      data-slot="avatar-badge"
+      className={cn(
+        'absolute right-0 bottom-0 z-10 inline-flex items-center justify-center rounded-full bg-primary text-primary-foreground bg-blend-color ring-2 ring-background select-none',
+        'group-data-[size=sm]/avatar:size-2 group-data-[size=sm]/avatar:[&>svg]:hidden',
+        'group-data-[size=default]/avatar:size-2.5 group-data-[size=default]/avatar:[&>svg]:size-2',
+        'group-data-[size=lg]/avatar:size-3 group-data-[size=lg]/avatar:[&>svg]:size-2',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarGroup({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="avatar-group"
+      className={cn(
+        'group/avatar-group flex -space-x-2 *:data-[slot=avatar]:ring-2 *:data-[slot=avatar]:ring-background',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function AvatarGroupCount({
+  className,
+  ...props
+}: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="avatar-group-count"
+      className={cn(
+        'relative flex size-8 shrink-0 items-center justify-center rounded-full bg-muted text-sm text-muted-foreground ring-2 ring-background group-has-data-[size=lg]/avatar-group:size-10 group-has-data-[size=sm]/avatar-group:size-6 [&>svg]:size-4 group-has-data-[size=lg]/avatar-group:[&>svg]:size-5 group-has-data-[size=sm]/avatar-group:[&>svg]:size-3',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Avatar,
+  AvatarBadge,
+  AvatarFallback,
+  AvatarGroup,
+  AvatarGroupCount,
+  AvatarImage,
+}

src/components/ui/badge.tsx

@@ -0,0 +1,51 @@
+import { mergeProps } from '@base-ui/react/merge-props'
+import { useRender } from '@base-ui/react/use-render'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+
+const badgeVariants = cva(
+  'group/badge inline-flex h-5 w-fit shrink-0 items-center justify-center gap-1 overflow-hidden rounded-4xl border border-transparent px-2 py-0.5 text-xs font-medium whitespace-nowrap transition-all focus-visible:border-ring focus-visible:ring-[3px] focus-visible:ring-ring/50 has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 aria-invalid:border-destructive aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 [&>svg]:pointer-events-none [&>svg]:size-3!',
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary text-primary-foreground [a]:hover:bg-primary/80',
+        secondary:
+          'bg-secondary text-secondary-foreground [a]:hover:bg-secondary/80',
+        destructive:
+          'bg-destructive/10 text-destructive focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:focus-visible:ring-destructive/40 [a]:hover:bg-destructive/20',
+        outline:
+          'border-border text-foreground [a]:hover:bg-muted [a]:hover:text-muted-foreground',
+        ghost:
+          'hover:bg-muted hover:text-muted-foreground dark:hover:bg-muted/50',
+        link: 'text-primary underline-offset-4 hover:underline',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  },
+)
+
+function Badge({
+  className,
+  variant = 'default',
+  render,
+  ...props
+}: useRender.ComponentProps<'span'> & VariantProps<typeof badgeVariants>) {
+  return useRender({
+    defaultTagName: 'span',
+    props: mergeProps<'span'>(
+      {
+        className: cn(badgeVariants({ variant }), className),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'badge',
+      variant,
+    },
+  })
+}
+
+export { Badge, badgeVariants }

src/components/ui/bubble.tsx

@@ -0,0 +1,127 @@
+import { mergeProps } from '@base-ui/react/merge-props'
+import { useRender } from '@base-ui/react/use-render'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function BubbleGroup({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="bubble-group"
+      className={cn('flex min-w-0 flex-col gap-2', className)}
+      {...props}
+    />
+  )
+}
+
+const bubbleVariants = cva(
+  'group/bubble relative flex w-fit max-w-[80%] min-w-0 flex-col gap-1 group-data-[align=end]/message:self-end data-[align=end]:self-end data-[variant=ghost]:max-w-full',
+  {
+    variants: {
+      variant: {
+        default:
+          '*:data-[slot=bubble-content]:bg-primary *:data-[slot=bubble-content]:text-primary-foreground [&>[data-slot=bubble-content]:is(button,a):hover]:bg-primary/80',
+        secondary:
+          '*:data-[slot=bubble-content]:bg-secondary *:data-[slot=bubble-content]:text-secondary-foreground [&>[data-slot=bubble-content]:is(button,a):hover]:bg-[color-mix(in_oklch,var(--secondary),var(--foreground)_5%)]',
+        muted:
+          '*:data-[slot=bubble-content]:bg-muted [&>[data-slot=bubble-content]:is(button,a):hover]:bg-[color-mix(in_oklch,var(--muted),var(--foreground)_5%)]',
+        tinted:
+          '*:data-[slot=bubble-content]:bg-[oklch(from_var(--primary)_0.93_calc(c*0.4)_h)] *:data-[slot=bubble-content]:text-foreground dark:*:data-[slot=bubble-content]:bg-[oklch(from_var(--primary)_0.3_calc(c*0.4)_h)] [&>[data-slot=bubble-content]:is(button,a):hover]:bg-[oklch(from_var(--primary)_0.88_calc(c*0.5)_h)] dark:[&>[data-slot=bubble-content]:is(button,a):hover]:bg-[oklch(from_var(--primary)_0.35_calc(c*0.5)_h)]',
+        outline:
+          '*:data-[slot=bubble-content]:border-border *:data-[slot=bubble-content]:bg-background [&>[data-slot=bubble-content]:is(button,a):hover]:bg-muted [&>[data-slot=bubble-content]:is(button,a):hover]:text-foreground dark:[&>[data-slot=bubble-content]:is(button,a):hover]:bg-input/30',
+        ghost:
+          'border-none *:data-[slot=bubble-content]:rounded-none *:data-[slot=bubble-content]:bg-transparent *:data-[slot=bubble-content]:p-0 [&>[data-slot=bubble-content]:is(button,a):hover]:bg-muted [&>[data-slot=bubble-content]:is(button,a):hover]:text-foreground dark:[&>[data-slot=bubble-content]:is(button,a):hover]:bg-muted/50',
+        destructive:
+          '*:data-[slot=bubble-content]:bg-destructive/10 *:data-[slot=bubble-content]:text-destructive dark:*:data-[slot=bubble-content]:bg-destructive/20 [&>[data-slot=bubble-content]:is(button,a):hover]:bg-destructive/20 dark:[&>[data-slot=bubble-content]:is(button,a):hover]:bg-destructive/30',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  },
+)
+
+function Bubble({
+  variant = 'default',
+  align = 'start',
+  className,
+  ...props
+}: React.ComponentProps<'div'> &
+  VariantProps<typeof bubbleVariants> & {
+    align?: 'start' | 'end'
+  }) {
+  return (
+    <div
+      data-slot="bubble"
+      data-variant={variant}
+      data-align={align}
+      className={cn(bubbleVariants({ variant }), className)}
+      {...props}
+    />
+  )
+}
+
+function BubbleContent({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<'div'>) {
+  return useRender({
+    defaultTagName: 'div',
+    props: mergeProps<'div'>(
+      {
+        className: cn(
+          'w-fit max-w-full min-w-0 overflow-hidden rounded-xl border border-transparent px-3 py-2 text-sm leading-relaxed wrap-break-word group-data-[align=end]/bubble:self-end [button]:text-left [button,a]:transition-colors [button,a]:outline-none [button,a]:focus-visible:border-ring [button,a]:focus-visible:ring-3 [button,a]:focus-visible:ring-ring/50',
+          className,
+        ),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'bubble-content',
+    },
+  })
+}
+
+const bubbleReactionsVariants = cva(
+  'absolute z-10 flex w-fit shrink-0 items-center justify-center gap-1 rounded-full bg-muted px-1.5 py-0.5 text-sm ring-3 ring-card has-[button]:p-0',
+  {
+    variants: {
+      side: {
+        top: 'top-0 -translate-y-3/4',
+        bottom: 'bottom-0 translate-y-3/4',
+      },
+      align: {
+        start: 'left-3',
+        end: 'right-3',
+      },
+    },
+    defaultVariants: {
+      side: 'bottom',
+      align: 'end',
+    },
+  },
+)
+
+function BubbleReactions({
+  side = 'bottom',
+  align = 'end',
+  className,
+  ...props
+}: React.ComponentProps<'div'> & {
+  align?: 'start' | 'end'
+  side?: 'top' | 'bottom'
+}) {
+  return (
+    <div
+      data-slot="bubble-reactions"
+      data-align={align}
+      data-side={side}
+      className={cn(bubbleReactionsVariants({ side, align }), className)}
+      {...props}
+    />
+  )
+}
+
+export { Bubble, BubbleContent, BubbleGroup, BubbleReactions }

src/components/ui/button.tsx

@@ -0,0 +1,57 @@
+import { Button as ButtonPrimitive } from '@base-ui/react/button'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+
+const buttonVariants = cva(
+  "group/button inline-flex shrink-0 items-center justify-center rounded-lg border border-transparent bg-clip-padding text-sm font-medium whitespace-nowrap transition-all outline-none select-none focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 active:not-aria-[haspopup]:translate-y-px disabled:pointer-events-none disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+  {
+    variants: {
+      variant: {
+        default: 'bg-primary text-primary-foreground hover:bg-primary/80',
+        outline:
+          'border-border bg-background hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:border-input dark:bg-input/30 dark:hover:bg-input/50',
+        secondary:
+          'bg-secondary text-secondary-foreground hover:bg-[color-mix(in_oklch,var(--secondary),var(--foreground)_5%)] aria-expanded:bg-secondary aria-expanded:text-secondary-foreground',
+        ghost:
+          'hover:bg-muted hover:text-foreground aria-expanded:bg-muted aria-expanded:text-foreground dark:hover:bg-muted/50',
+        destructive:
+          'bg-destructive/10 text-destructive hover:bg-destructive/20 focus-visible:border-destructive/40 focus-visible:ring-destructive/20 dark:bg-destructive/20 dark:hover:bg-destructive/30 dark:focus-visible:ring-destructive/40',
+        link: 'text-primary underline-offset-4 hover:underline',
+      },
+      size: {
+        default:
+          'h-8 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2',
+        xs: "h-6 gap-1 rounded-[min(var(--radius-md),10px)] px-2 text-xs in-data-[slot=button-group]:rounded-lg has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3",
+        sm: "h-7 gap-1 rounded-[min(var(--radius-md),12px)] px-2.5 text-[0.8rem] in-data-[slot=button-group]:rounded-lg has-data-[icon=inline-end]:pr-1.5 has-data-[icon=inline-start]:pl-1.5 [&_svg:not([class*='size-'])]:size-3.5",
+        lg: 'h-9 gap-1.5 px-2.5 has-data-[icon=inline-end]:pr-2 has-data-[icon=inline-start]:pl-2',
+        icon: 'size-8',
+        'icon-xs':
+          "size-6 rounded-[min(var(--radius-md),10px)] in-data-[slot=button-group]:rounded-lg [&_svg:not([class*='size-'])]:size-3",
+        'icon-sm':
+          'size-7 rounded-[min(var(--radius-md),12px)] in-data-[slot=button-group]:rounded-lg',
+        'icon-lg': 'size-9',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default',
+    },
+  },
+)
+
+function Button({
+  className,
+  variant = 'default',
+  size = 'default',
+  ...props
+}: ButtonPrimitive.Props & VariantProps<typeof buttonVariants>) {
+  return (
+    <ButtonPrimitive
+      data-slot="button"
+      className={cn(buttonVariants({ variant, size, className }))}
+      {...props}
+    />
+  )
+}
+
+export { Button, buttonVariants }

src/components/ui/checkbox.tsx

@@ -0,0 +1,25 @@
+import { Checkbox as CheckboxPrimitive } from '@base-ui/react/checkbox'
+import { cn } from 'cn'
+import { CheckIcon } from 'lucide-react'
+
+function Checkbox({ className, ...props }: CheckboxPrimitive.Root.Props) {
+  return (
+    <CheckboxPrimitive.Root
+      data-slot="checkbox"
+      className={cn(
+        'peer relative flex size-4 shrink-0 items-center justify-center rounded-[4px] border border-input transition-colors outline-none group-has-disabled/field:opacity-50 group-has-[:focus-visible]/field-label:ring-0 group-has-[:focus-visible]/field-label:not-data-checked:border-input after:absolute after:-inset-x-3 after:-inset-y-2 focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 aria-invalid:aria-checked:border-primary dark:bg-input/30 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40 data-checked:border-primary data-checked:bg-primary data-checked:text-primary-foreground group-has-[:focus-visible]/field-label:data-checked:border-primary dark:data-checked:bg-primary',
+        className,
+      )}
+      {...props}
+    >
+      <CheckboxPrimitive.Indicator
+        data-slot="checkbox-indicator"
+        className="grid place-content-center text-current transition-none [&>svg]:size-3.5"
+      >
+        <CheckIcon />
+      </CheckboxPrimitive.Indicator>
+    </CheckboxPrimitive.Root>
+  )
+}
+
+export { Checkbox }

src/components/ui/collapsible.tsx

@@ -0,0 +1,19 @@
+import { Collapsible as CollapsiblePrimitive } from '@base-ui/react/collapsible'
+
+function Collapsible({ ...props }: CollapsiblePrimitive.Root.Props) {
+  return <CollapsiblePrimitive.Root data-slot="collapsible" {...props} />
+}
+
+function CollapsibleTrigger({ ...props }: CollapsiblePrimitive.Trigger.Props) {
+  return (
+    <CollapsiblePrimitive.Trigger data-slot="collapsible-trigger" {...props} />
+  )
+}
+
+function CollapsibleContent({ ...props }: CollapsiblePrimitive.Panel.Props) {
+  return (
+    <CollapsiblePrimitive.Panel data-slot="collapsible-content" {...props} />
+  )
+}
+
+export { Collapsible, CollapsibleContent, CollapsibleTrigger }

src/components/ui/dialog.tsx

@@ -0,0 +1,153 @@
+import { Dialog as DialogPrimitive } from '@base-ui/react/dialog'
+import { cn } from 'cn'
+import { XIcon } from 'lucide-react'
+import type * as React from 'react'
+import { Button } from '#/components/ui/button.tsx'
+
+function Dialog({ ...props }: DialogPrimitive.Root.Props) {
+  return <DialogPrimitive.Root data-slot="dialog" {...props} />
+}
+
+function DialogTrigger({ ...props }: DialogPrimitive.Trigger.Props) {
+  return <DialogPrimitive.Trigger data-slot="dialog-trigger" {...props} />
+}
+
+function DialogPortal({ ...props }: DialogPrimitive.Portal.Props) {
+  return <DialogPrimitive.Portal data-slot="dialog-portal" {...props} />
+}
+
+function DialogClose({ ...props }: DialogPrimitive.Close.Props) {
+  return <DialogPrimitive.Close data-slot="dialog-close" {...props} />
+}
+
+function DialogOverlay({
+  className,
+  ...props
+}: DialogPrimitive.Backdrop.Props) {
+  return (
+    <DialogPrimitive.Backdrop
+      data-slot="dialog-overlay"
+      className={cn(
+        'fixed inset-0 isolate z-50 bg-overlay duration-100 supports-backdrop-filter:backdrop-blur-xs data-open:animate-in data-open:fade-in-0 data-closed:animate-out data-closed:fade-out-0',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function DialogContent({
+  className,
+  children,
+  showCloseButton = true,
+  ...props
+}: DialogPrimitive.Popup.Props & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <DialogPortal>
+      <DialogOverlay />
+      <DialogPrimitive.Popup
+        data-slot="dialog-content"
+        className={cn(
+          'fixed top-1/2 left-1/2 z-50 grid w-full max-w-[calc(100%-2rem)] -translate-x-1/2 -translate-y-1/2 gap-4 rounded-xl bg-popover p-4 text-sm text-popover-foreground ring-1 ring-foreground/10 duration-100 outline-none sm:max-w-sm data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95',
+          className,
+        )}
+        {...props}
+      >
+        {children}
+        {showCloseButton && (
+          <DialogPrimitive.Close
+            data-slot="dialog-close"
+            render={
+              <Button
+                variant="ghost"
+                className="absolute top-2 right-2"
+                size="icon-sm"
+              />
+            }
+          >
+            <XIcon />
+            <span className="sr-only">Close</span>
+          </DialogPrimitive.Close>
+        )}
+      </DialogPrimitive.Popup>
+    </DialogPortal>
+  )
+}
+
+function DialogHeader({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="dialog-header"
+      className={cn('flex flex-col gap-2', className)}
+      {...props}
+    />
+  )
+}
+
+function DialogFooter({
+  className,
+  showCloseButton = false,
+  children,
+  ...props
+}: React.ComponentProps<'div'> & {
+  showCloseButton?: boolean
+}) {
+  return (
+    <div
+      data-slot="dialog-footer"
+      className={cn(
+        '-mx-4 -mb-4 flex flex-col-reverse gap-2 rounded-b-xl border-t bg-muted/50 p-4 sm:flex-row sm:justify-end',
+        className,
+      )}
+      {...props}
+    >
+      {children}
+      {showCloseButton && (
+        <DialogPrimitive.Close render={<Button variant="outline" />}>
+          Close
+        </DialogPrimitive.Close>
+      )}
+    </div>
+  )
+}
+
+function DialogTitle({ className, ...props }: DialogPrimitive.Title.Props) {
+  return (
+    <DialogPrimitive.Title
+      data-slot="dialog-title"
+      className={cn('text-base leading-none font-medium', className)}
+      {...props}
+    />
+  )
+}
+
+function DialogDescription({
+  className,
+  ...props
+}: DialogPrimitive.Description.Props) {
+  return (
+    <DialogPrimitive.Description
+      data-slot="dialog-description"
+      className={cn(
+        'text-sm text-muted-foreground *:[a]:underline *:[a]:underline-offset-3 *:[a]:hover:text-foreground',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Dialog,
+  DialogClose,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogOverlay,
+  DialogPortal,
+  DialogTitle,
+  DialogTrigger,
+}

src/components/ui/dropdown-menu.tsx

@@ -0,0 +1,271 @@
+'use client'
+
+import { Menu as MenuPrimitive } from '@base-ui/react/menu'
+import { cn } from 'cn'
+import { CheckIcon, ChevronRightIcon } from 'lucide-react'
+import type * as React from 'react'
+
+function DropdownMenu({ ...props }: MenuPrimitive.Root.Props) {
+  return <MenuPrimitive.Root data-slot="dropdown-menu" {...props} />
+}
+
+function DropdownMenuPortal({ ...props }: MenuPrimitive.Portal.Props) {
+  return <MenuPrimitive.Portal data-slot="dropdown-menu-portal" {...props} />
+}
+
+function DropdownMenuTrigger({ ...props }: MenuPrimitive.Trigger.Props) {
+  return <MenuPrimitive.Trigger data-slot="dropdown-menu-trigger" {...props} />
+}
+
+function DropdownMenuContent({
+  align = 'start',
+  alignOffset = 0,
+  side = 'bottom',
+  sideOffset = 4,
+  className,
+  ...props
+}: MenuPrimitive.Popup.Props &
+  Pick<
+    MenuPrimitive.Positioner.Props,
+    'align' | 'alignOffset' | 'side' | 'sideOffset'
+  >) {
+  return (
+    <MenuPrimitive.Portal>
+      <MenuPrimitive.Positioner
+        className="isolate z-50 outline-none"
+        align={align}
+        alignOffset={alignOffset}
+        side={side}
+        sideOffset={sideOffset}
+      >
+        <MenuPrimitive.Popup
+          data-slot="dropdown-menu-content"
+          className={cn(
+            'z-50 max-h-(--available-height) w-(--anchor-width) min-w-32 origin-(--transform-origin) overflow-x-hidden overflow-y-auto rounded-lg bg-popover p-1 text-popover-foreground shadow-md ring-1 ring-foreground/10 duration-100 outline-none data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:overflow-hidden data-closed:fade-out-0 data-closed:zoom-out-95',
+            className,
+          )}
+          {...props}
+        />
+      </MenuPrimitive.Positioner>
+    </MenuPrimitive.Portal>
+  )
+}
+
+function DropdownMenuGroup({ ...props }: MenuPrimitive.Group.Props) {
+  return <MenuPrimitive.Group data-slot="dropdown-menu-group" {...props} />
+}
+
+function DropdownMenuLabel({
+  className,
+  inset,
+  ...props
+}: MenuPrimitive.GroupLabel.Props & {
+  inset?: boolean
+}) {
+  return (
+    <MenuPrimitive.GroupLabel
+      data-slot="dropdown-menu-label"
+      data-inset={inset}
+      className={cn(
+        'px-1.5 py-1 text-xs font-medium text-muted-foreground data-inset:pl-7',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuItem({
+  className,
+  inset,
+  variant = 'default',
+  ...props
+}: MenuPrimitive.Item.Props & {
+  inset?: boolean
+  variant?: 'default' | 'destructive'
+}) {
+  return (
+    <MenuPrimitive.Item
+      data-slot="dropdown-menu-item"
+      data-inset={inset}
+      data-variant={variant}
+      className={cn(
+        "group/dropdown-menu-item relative flex cursor-default items-center gap-1.5 rounded-md px-1.5 py-1 text-sm outline-hidden select-none focus:bg-accent focus:text-accent-foreground not-data-[variant=destructive]:focus:**:text-accent-foreground data-inset:pl-7 data-[variant=destructive]:text-destructive data-[variant=destructive]:focus:bg-destructive/10 data-[variant=destructive]:focus:text-destructive dark:data-[variant=destructive]:focus:bg-destructive/20 data-disabled:pointer-events-none data-disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4 data-[variant=destructive]:*:[svg]:text-destructive",
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuSub({ ...props }: MenuPrimitive.SubmenuRoot.Props) {
+  return <MenuPrimitive.SubmenuRoot data-slot="dropdown-menu-sub" {...props} />
+}
+
+function DropdownMenuSubTrigger({
+  className,
+  inset,
+  children,
+  ...props
+}: MenuPrimitive.SubmenuTrigger.Props & {
+  inset?: boolean
+}) {
+  return (
+    <MenuPrimitive.SubmenuTrigger
+      data-slot="dropdown-menu-sub-trigger"
+      data-inset={inset}
+      className={cn(
+        "flex cursor-default items-center gap-1.5 rounded-md px-1.5 py-1 text-sm outline-hidden select-none focus:bg-accent focus:text-accent-foreground not-data-[variant=destructive]:focus:**:text-accent-foreground data-inset:pl-7 data-popup-open:bg-accent data-popup-open:text-accent-foreground data-open:bg-accent data-open:text-accent-foreground [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    >
+      {children}
+      <ChevronRightIcon className="ml-auto" />
+    </MenuPrimitive.SubmenuTrigger>
+  )
+}
+
+function DropdownMenuSubContent({
+  align = 'start',
+  alignOffset = -3,
+  side = 'right',
+  sideOffset = 0,
+  className,
+  ...props
+}: React.ComponentProps<typeof DropdownMenuContent>) {
+  return (
+    <DropdownMenuContent
+      data-slot="dropdown-menu-sub-content"
+      className={cn(
+        'w-auto min-w-[96px] rounded-lg bg-popover p-1 text-popover-foreground shadow-lg ring-1 ring-foreground/10 duration-100 data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95',
+        className,
+      )}
+      align={align}
+      alignOffset={alignOffset}
+      side={side}
+      sideOffset={sideOffset}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuCheckboxItem({
+  className,
+  children,
+  checked,
+  inset,
+  ...props
+}: MenuPrimitive.CheckboxItem.Props & {
+  inset?: boolean
+}) {
+  return (
+    <MenuPrimitive.CheckboxItem
+      data-slot="dropdown-menu-checkbox-item"
+      data-inset={inset}
+      className={cn(
+        "relative flex cursor-default items-center gap-1.5 rounded-md py-1 pr-8 pl-1.5 text-sm outline-hidden select-none focus:bg-accent focus:text-accent-foreground focus:**:text-accent-foreground data-inset:pl-7 data-disabled:pointer-events-none data-disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      checked={checked}
+      {...props}
+    >
+      <span
+        className="pointer-events-none absolute right-2 flex items-center justify-center"
+        data-slot="dropdown-menu-checkbox-item-indicator"
+      >
+        <MenuPrimitive.CheckboxItemIndicator>
+          <CheckIcon />
+        </MenuPrimitive.CheckboxItemIndicator>
+      </span>
+      {children}
+    </MenuPrimitive.CheckboxItem>
+  )
+}
+
+function DropdownMenuRadioGroup({ ...props }: MenuPrimitive.RadioGroup.Props) {
+  return (
+    <MenuPrimitive.RadioGroup
+      data-slot="dropdown-menu-radio-group"
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuRadioItem({
+  className,
+  children,
+  inset,
+  ...props
+}: MenuPrimitive.RadioItem.Props & {
+  inset?: boolean
+}) {
+  return (
+    <MenuPrimitive.RadioItem
+      data-slot="dropdown-menu-radio-item"
+      data-inset={inset}
+      className={cn(
+        "relative flex cursor-default items-center gap-1.5 rounded-md py-1 pr-8 pl-1.5 text-sm outline-hidden select-none focus:bg-accent focus:text-accent-foreground focus:**:text-accent-foreground data-inset:pl-7 data-disabled:pointer-events-none data-disabled:opacity-50 [&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    >
+      <span
+        className="pointer-events-none absolute right-2 flex items-center justify-center"
+        data-slot="dropdown-menu-radio-item-indicator"
+      >
+        <MenuPrimitive.RadioItemIndicator>
+          <CheckIcon />
+        </MenuPrimitive.RadioItemIndicator>
+      </span>
+      {children}
+    </MenuPrimitive.RadioItem>
+  )
+}
+
+function DropdownMenuSeparator({
+  className,
+  ...props
+}: MenuPrimitive.Separator.Props) {
+  return (
+    <MenuPrimitive.Separator
+      data-slot="dropdown-menu-separator"
+      className={cn('-mx-1 my-1 h-px bg-border', className)}
+      {...props}
+    />
+  )
+}
+
+function DropdownMenuShortcut({
+  className,
+  ...props
+}: React.ComponentProps<'span'>) {
+  return (
+    <span
+      data-slot="dropdown-menu-shortcut"
+      className={cn(
+        'ml-auto text-xs tracking-widest text-muted-foreground group-focus/dropdown-menu-item:text-accent-foreground',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  DropdownMenu,
+  DropdownMenuCheckboxItem,
+  DropdownMenuContent,
+  DropdownMenuGroup,
+  DropdownMenuItem,
+  DropdownMenuLabel,
+  DropdownMenuPortal,
+  DropdownMenuRadioGroup,
+  DropdownMenuRadioItem,
+  DropdownMenuSeparator,
+  DropdownMenuShortcut,
+  DropdownMenuSub,
+  DropdownMenuSubContent,
+  DropdownMenuSubTrigger,
+  DropdownMenuTrigger,
+}

src/components/ui/empty.tsx

@@ -0,0 +1,100 @@
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+
+function Empty({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="empty"
+      className={cn(
+        'flex w-full min-w-0 flex-1 flex-col items-center justify-center gap-4 rounded-xl border-dashed p-6 text-center text-balance',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function EmptyHeader({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="empty-header"
+      className={cn('flex max-w-sm flex-col items-center gap-2', className)}
+      {...props}
+    />
+  )
+}
+
+const emptyMediaVariants = cva(
+  'mb-2 flex shrink-0 items-center justify-center [&_svg]:pointer-events-none [&_svg]:shrink-0',
+  {
+    variants: {
+      variant: {
+        default: 'bg-transparent',
+        icon: "flex size-8 shrink-0 items-center justify-center rounded-lg bg-muted text-foreground [&_svg:not([class*='size-'])]:size-4",
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  },
+)
+
+function EmptyMedia({
+  className,
+  variant = 'default',
+  ...props
+}: React.ComponentProps<'div'> & VariantProps<typeof emptyMediaVariants>) {
+  return (
+    <div
+      data-slot="empty-icon"
+      data-variant={variant}
+      className={cn(emptyMediaVariants({ variant, className }))}
+      {...props}
+    />
+  )
+}
+
+function EmptyTitle({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="empty-title"
+      className={cn('text-sm font-medium tracking-tight', className)}
+      {...props}
+    />
+  )
+}
+
+function EmptyDescription({ className, ...props }: React.ComponentProps<'p'>) {
+  return (
+    <div
+      data-slot="empty-description"
+      className={cn(
+        'text-sm/relaxed text-muted-foreground [&>a]:underline [&>a]:underline-offset-4 [&>a:hover]:text-primary',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function EmptyContent({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="empty-content"
+      className={cn(
+        'flex w-full max-w-sm min-w-0 flex-col items-center gap-2.5 text-sm text-balance',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Empty,
+  EmptyContent,
+  EmptyDescription,
+  EmptyHeader,
+  EmptyMedia,
+  EmptyTitle,
+}

src/components/ui/input-group.tsx

@@ -0,0 +1,158 @@
+'use client'
+
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+import type * as React from 'react'
+
+import { Button } from '#/components/ui/button.tsx'
+import { Input } from '#/components/ui/input.tsx'
+import { Textarea } from '#/components/ui/textarea.tsx'
+
+function InputGroup({ className, ...props }: React.ComponentProps<'fieldset'>) {
+  return (
+    <fieldset
+      data-slot="input-group"
+      className={cn(
+        'group/input-group relative flex h-8 w-full min-w-0 items-center rounded-lg border border-input transition-colors outline-none in-data-[slot=combobox-content]:focus-within:border-inherit in-data-[slot=combobox-content]:focus-within:ring-0 has-disabled:bg-input/50 has-disabled:opacity-50 has-[[data-slot=input-group-control]:focus-visible]:border-ring has-[[data-slot=input-group-control]:focus-visible]:ring-3 has-[[data-slot=input-group-control]:focus-visible]:ring-ring/50 has-[[data-slot][aria-invalid=true]]:border-destructive has-[[data-slot][aria-invalid=true]]:ring-3 has-[[data-slot][aria-invalid=true]]:ring-destructive/20 has-[>[data-align=block-end]]:h-auto has-[>[data-align=block-end]]:flex-col has-[>[data-align=block-start]]:h-auto has-[>[data-align=block-start]]:flex-col has-[>textarea]:h-auto dark:bg-input/30 dark:has-disabled:bg-input/80 dark:has-[[data-slot][aria-invalid=true]]:ring-destructive/40 has-[>[data-align=block-end]]:[&>input]:pt-3 has-[>[data-align=block-start]]:[&>input]:pb-3 has-[>[data-align=inline-end]]:[&>input]:pr-1.5 has-[>[data-align=inline-start]]:[&>input]:pl-1.5',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+const inputGroupAddonVariants = cva(
+  "flex h-auto cursor-text items-center justify-center gap-2 py-1.5 text-sm font-medium text-muted-foreground select-none group-data-[disabled=true]/input-group:opacity-50 [&>kbd]:rounded-[calc(var(--radius)-5px)] [&>svg:not([class*='size-'])]:size-4",
+  {
+    variants: {
+      align: {
+        'inline-start':
+          'order-first pl-2 has-[>button]:ml-[-0.3rem] has-[>kbd]:ml-[-0.15rem]',
+        'inline-end':
+          'order-last pr-2 has-[>button]:mr-[-0.3rem] has-[>kbd]:mr-[-0.15rem]',
+        'block-start':
+          'order-first w-full justify-start px-2.5 pt-2 group-has-[>input]/input-group:pt-2 [.border-b]:pb-2',
+        'block-end':
+          'order-last w-full justify-start px-2.5 pb-2 group-has-[>input]/input-group:pb-2 [.border-t]:pt-2',
+      },
+    },
+    defaultVariants: {
+      align: 'inline-start',
+    },
+  },
+)
+
+function InputGroupAddon({
+  className,
+  align = 'inline-start',
+  ...props
+}: React.ComponentProps<'fieldset'> &
+  VariantProps<typeof inputGroupAddonVariants>) {
+  return (
+    // biome-ignore lint/a11y/useKeyWithClickEvents: Pointer convenience only; the text control remains independently keyboard-focusable.
+    <fieldset
+      data-slot="input-group-addon"
+      data-align={align}
+      className={cn(inputGroupAddonVariants({ align }), className)}
+      onClick={(e) => {
+        if ((e.target as HTMLElement).closest('button')) {
+          return
+        }
+        e.currentTarget.parentElement?.querySelector('input')?.focus()
+      }}
+      {...props}
+    />
+  )
+}
+
+const inputGroupButtonVariants = cva(
+  'flex items-center gap-2 text-sm shadow-none',
+  {
+    variants: {
+      size: {
+        xs: "h-6 gap-1 rounded-[calc(var(--radius)-3px)] px-1.5 [&>svg:not([class*='size-'])]:size-3.5",
+        sm: '',
+        'icon-xs':
+          'size-6 rounded-[calc(var(--radius)-3px)] p-0 has-[>svg]:p-0',
+        'icon-sm': 'size-8 p-0 has-[>svg]:p-0',
+      },
+    },
+    defaultVariants: {
+      size: 'xs',
+    },
+  },
+)
+
+function InputGroupButton({
+  className,
+  type = 'button',
+  variant = 'ghost',
+  size = 'xs',
+  ...props
+}: Omit<React.ComponentProps<typeof Button>, 'size' | 'type'> &
+  VariantProps<typeof inputGroupButtonVariants> & {
+    type?: 'button' | 'submit' | 'reset'
+  }) {
+  return (
+    <Button
+      type={type}
+      data-size={size}
+      variant={variant}
+      className={cn(inputGroupButtonVariants({ size }), className)}
+      {...props}
+    />
+  )
+}
+
+function InputGroupText({ className, ...props }: React.ComponentProps<'span'>) {
+  return (
+    <span
+      className={cn(
+        "flex items-center gap-2 text-sm text-muted-foreground [&_svg]:pointer-events-none [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function InputGroupInput({
+  className,
+  ...props
+}: React.ComponentProps<'input'>) {
+  return (
+    <Input
+      data-slot="input-group-control"
+      className={cn(
+        'flex-1 rounded-none border-0 bg-transparent shadow-none ring-0 focus-visible:ring-0 disabled:bg-transparent aria-invalid:ring-0 dark:bg-transparent dark:disabled:bg-transparent',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function InputGroupTextarea({
+  className,
+  ...props
+}: React.ComponentProps<'textarea'>) {
+  return (
+    <Textarea
+      data-slot="input-group-control"
+      className={cn(
+        'flex-1 resize-none rounded-none border-0 bg-transparent py-2 shadow-none ring-0 focus-visible:ring-0 disabled:bg-transparent aria-invalid:ring-0 dark:bg-transparent dark:disabled:bg-transparent',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  InputGroup,
+  InputGroupAddon,
+  InputGroupButton,
+  InputGroupInput,
+  InputGroupText,
+  InputGroupTextarea,
+}

src/components/ui/input.tsx

@@ -0,0 +1,19 @@
+import { Input as InputPrimitive } from '@base-ui/react/input'
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function Input({ className, type, ...props }: React.ComponentProps<'input'>) {
+  return (
+    <InputPrimitive
+      type={type}
+      data-slot="input"
+      className={cn(
+        'h-8 w-full min-w-0 rounded-lg border border-input bg-transparent px-2.5 py-1 text-base transition-colors outline-none file:inline-flex file:h-6 file:border-0 file:bg-transparent file:text-sm file:font-medium file:text-foreground placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:cursor-not-allowed disabled:bg-input/50 disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:disabled:bg-input/80 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Input }

src/components/ui/label.tsx

@@ -0,0 +1,20 @@
+'use client'
+
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function Label({ className, ...props }: React.ComponentProps<'label'>) {
+  return (
+    // biome-ignore lint/a11y/noLabelWithoutControl: Association and content are supplied by the caller through props.
+    <label
+      data-slot="label"
+      className={cn(
+        'flex items-center gap-2 text-sm leading-none font-medium select-none group-data-[disabled=true]:pointer-events-none group-data-[disabled=true]:opacity-50 peer-disabled:cursor-not-allowed peer-disabled:opacity-50',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Label }

src/components/ui/marker.tsx

@@ -0,0 +1,70 @@
+import { mergeProps } from '@base-ui/react/merge-props'
+import { useRender } from '@base-ui/react/use-render'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+import type * as React from 'react'
+
+const markerVariants = cva(
+  "group/marker relative flex min-h-4 w-full items-center gap-2 text-left text-sm text-muted-foreground [&_svg:not([class*='size-'])]:size-4 [a]:underline [a]:underline-offset-3 [a]:hover:text-foreground",
+  {
+    variants: {
+      variant: {
+        default: '',
+        separator:
+          'before:mr-1 before:h-px before:min-w-0 before:flex-1 before:bg-border after:ml-1 after:h-px after:min-w-0 after:flex-1 after:bg-border',
+        border: 'border-b border-border pb-2',
+      },
+    },
+  },
+)
+
+function Marker({
+  className,
+  variant = 'default',
+  render,
+  ...props
+}: useRender.ComponentProps<'div'> & VariantProps<typeof markerVariants>) {
+  return useRender({
+    defaultTagName: 'div',
+    props: mergeProps<'div'>(
+      {
+        className: cn(markerVariants({ variant, className })),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'marker',
+      variant,
+    },
+  })
+}
+
+function MarkerIcon({ className, ...props }: React.ComponentProps<'span'>) {
+  return (
+    <span
+      data-slot="marker-icon"
+      aria-hidden="true"
+      className={cn(
+        "size-4 shrink-0 [&_svg:not([class*='size-'])]:size-4",
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MarkerContent({ className, ...props }: React.ComponentProps<'span'>) {
+  return (
+    <span
+      data-slot="marker-content"
+      className={cn(
+        'min-w-0 wrap-break-word group-data-[variant=separator]/marker:flex-none group-data-[variant=separator]/marker:text-center *:[a]:underline *:[a]:underline-offset-3 *:[a]:hover:text-foreground',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Marker, MarkerContent, MarkerIcon, markerVariants }

src/components/ui/message-scroller.tsx

@@ -0,0 +1,129 @@
+'use client'
+
+import {
+  MessageScroller as MessageScrollerPrimitive,
+  useMessageScroller,
+  useMessageScrollerScrollable,
+  useMessageScrollerVisibility,
+} from '@shadcn/react/message-scroller'
+import { cn } from 'cn'
+import { ArrowDownIcon } from 'lucide-react'
+import type * as React from 'react'
+import { Button } from '#/components/ui/button.tsx'
+
+function MessageScrollerProvider(
+  props: React.ComponentProps<typeof MessageScrollerPrimitive.Provider>,
+) {
+  return <MessageScrollerPrimitive.Provider {...props} />
+}
+
+function MessageScroller({
+  className,
+  ...props
+}: React.ComponentProps<typeof MessageScrollerPrimitive.Root>) {
+  return (
+    <MessageScrollerPrimitive.Root
+      data-slot="message-scroller"
+      className={cn(
+        'group/message-scroller relative flex size-full min-h-0 flex-col overflow-hidden',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageScrollerViewport({
+  className,
+  ...props
+}: React.ComponentProps<typeof MessageScrollerPrimitive.Viewport>) {
+  return (
+    <MessageScrollerPrimitive.Viewport
+      data-slot="message-scroller-viewport"
+      className={cn(
+        'size-full min-h-0 min-w-0 scroll-fade-b scrollbar-thin scrollbar-gutter-stable overflow-y-auto overscroll-contain contain-content data-autoscrolling:scrollbar-thumb-transparent data-autoscrolling:scrollbar-track-transparent data-pending-scroll:invisible',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageScrollerContent({
+  className,
+  ...props
+}: React.ComponentProps<typeof MessageScrollerPrimitive.Content>) {
+  return (
+    <MessageScrollerPrimitive.Content
+      data-slot="message-scroller-content"
+      className={cn('flex h-max min-h-full flex-col gap-6', className)}
+      {...props}
+    />
+  )
+}
+
+function MessageScrollerItem({
+  className,
+  scrollAnchor = false,
+  ...props
+}: React.ComponentProps<typeof MessageScrollerPrimitive.Item>) {
+  return (
+    <MessageScrollerPrimitive.Item
+      data-slot="message-scroller-item"
+      scrollAnchor={scrollAnchor}
+      className={cn(
+        'min-w-0 shrink-0 [contain-intrinsic-size:auto_10rem] [content-visibility:auto]',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageScrollerButton({
+  direction = 'end',
+  className,
+  children,
+  render,
+  variant = 'secondary',
+  size = 'icon-sm',
+  ...props
+}: React.ComponentProps<typeof MessageScrollerPrimitive.Button> &
+  Pick<React.ComponentProps<typeof Button>, 'variant' | 'size'>) {
+  return (
+    <MessageScrollerPrimitive.Button
+      data-slot="message-scroller-button"
+      data-direction={direction}
+      data-variant={variant}
+      data-size={size}
+      direction={direction}
+      className={cn(
+        'absolute inset-s-1/2 -translate-x-1/2 border-border bg-background text-foreground transition-[translate,scale,opacity] duration-200 hover:bg-muted hover:text-foreground data-[active=false]:pointer-events-none data-[active=false]:scale-95 data-[active=false]:opacity-0 data-[active=false]:duration-400 data-[active=false]:ease-[cubic-bezier(0.7,0,0.84,0)] data-[active=true]:translate-y-0 data-[active=true]:scale-100 data-[active=true]:opacity-100 data-[active=true]:ease-[cubic-bezier(0.23,1,0.32,1)] data-[direction=end]:bottom-4 data-[direction=end]:data-[active=false]:translate-y-full data-[direction=start]:top-4 data-[direction=start]:data-[active=false]:-translate-y-full rtl:translate-x-1/2 data-[direction=start]:[&_svg]:rotate-180',
+        className,
+      )}
+      render={render ?? <Button variant={variant} size={size} />}
+      {...props}
+    >
+      {children ?? (
+        <>
+          <ArrowDownIcon />
+          <span className="sr-only">
+            {direction === 'end' ? 'Scroll to end' : 'Scroll to start'}
+          </span>
+        </>
+      )}
+    </MessageScrollerPrimitive.Button>
+  )
+}
+
+export {
+  MessageScroller,
+  MessageScrollerButton,
+  MessageScrollerContent,
+  MessageScrollerItem,
+  MessageScrollerProvider,
+  MessageScrollerViewport,
+  useMessageScroller,
+  useMessageScrollerScrollable,
+  useMessageScrollerVisibility,
+}

src/components/ui/message.tsx

@@ -0,0 +1,91 @@
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function MessageGroup({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="message-group"
+      className={cn('flex min-w-0 flex-col gap-2', className)}
+      {...props}
+    />
+  )
+}
+
+function Message({
+  className,
+  align = 'start',
+  ...props
+}: React.ComponentProps<'div'> & { align?: 'start' | 'end' }) {
+  return (
+    <div
+      data-slot="message"
+      data-align={align}
+      className={cn(
+        'group/message relative flex w-full min-w-0 gap-2 text-sm data-[align=end]:flex-row-reverse',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageAvatar({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="message-avatar"
+      className={cn(
+        'flex w-fit min-w-8 shrink-0 items-center justify-center self-end overflow-hidden rounded-full bg-muted group-has-data-[slot=message-footer]/message:-translate-y-8',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageContent({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="message-content"
+      className={cn(
+        'flex w-full min-w-0 flex-col gap-2.5 wrap-break-word group-data-[align=end]/message:*:data-slot:self-end',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageHeader({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="message-header"
+      className={cn(
+        'flex max-w-full min-w-0 items-center px-3 text-xs font-medium text-muted-foreground group-has-data-[variant=ghost]/message:px-0',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function MessageFooter({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="message-footer"
+      className={cn(
+        'flex max-w-full min-w-0 items-center px-3 text-xs font-medium text-muted-foreground group-has-data-[variant=ghost]/message:px-0 group-data-[align=end]/message:justify-end',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export {
+  Message,
+  MessageAvatar,
+  MessageContent,
+  MessageFooter,
+  MessageGroup,
+  MessageHeader,
+}

src/components/ui/native-select.tsx

@@ -0,0 +1,64 @@
+import { cn } from 'cn'
+import { ChevronDownIcon } from 'lucide-react'
+import type * as React from 'react'
+
+type NativeSelectProps = Omit<React.ComponentProps<'select'>, 'size'> & {
+  size?: 'sm' | 'default'
+}
+
+function NativeSelect({
+  className,
+  size = 'default',
+  ...props
+}: NativeSelectProps) {
+  return (
+    <div
+      className={cn(
+        'group/native-select relative w-fit has-[select:disabled]:opacity-50',
+        className,
+      )}
+      data-slot="native-select-wrapper"
+      data-size={size}
+    >
+      <select
+        data-slot="native-select"
+        data-size={size}
+        className="h-8 w-full min-w-0 appearance-none rounded-lg border border-input bg-transparent py-1 pr-8 pl-2.5 text-sm transition-colors outline-none select-none selection:bg-primary selection:text-primary-foreground placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:pointer-events-none disabled:cursor-not-allowed aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 data-[size=sm]:h-7 data-[size=sm]:rounded-[min(var(--radius-md),10px)] data-[size=sm]:py-0.5 dark:bg-input/30 dark:hover:bg-input/50 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40"
+        {...props}
+      />
+      <ChevronDownIcon
+        className="pointer-events-none absolute top-1/2 right-2.5 size-4 -translate-y-1/2 text-muted-foreground select-none"
+        aria-hidden="true"
+        data-slot="native-select-icon"
+      />
+    </div>
+  )
+}
+
+function NativeSelectOption({
+  className,
+  ...props
+}: React.ComponentProps<'option'>) {
+  return (
+    <option
+      data-slot="native-select-option"
+      className={cn('bg-[Canvas] text-[CanvasText]', className)}
+      {...props}
+    />
+  )
+}
+
+function NativeSelectOptGroup({
+  className,
+  ...props
+}: React.ComponentProps<'optgroup'>) {
+  return (
+    <optgroup
+      data-slot="native-select-optgroup"
+      className={cn('bg-[Canvas] text-[CanvasText]', className)}
+      {...props}
+    />
+  )
+}
+
+export { NativeSelect, NativeSelectOptGroup, NativeSelectOption }

src/components/ui/separator.tsx

@@ -0,0 +1,22 @@
+import { Separator as SeparatorPrimitive } from '@base-ui/react/separator'
+import { cn } from 'cn'
+
+function Separator({
+  className,
+  orientation = 'horizontal',
+  ...props
+}: SeparatorPrimitive.Props) {
+  return (
+    <SeparatorPrimitive
+      data-slot="separator"
+      orientation={orientation}
+      className={cn(
+        'shrink-0 bg-border data-horizontal:h-px data-horizontal:w-full data-vertical:w-px data-vertical:self-stretch',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Separator }

src/components/ui/sheet.tsx

@@ -0,0 +1,133 @@
+import { Dialog as SheetPrimitive } from '@base-ui/react/dialog'
+import { cn } from 'cn'
+import { XIcon } from 'lucide-react'
+import type * as React from 'react'
+import { Button } from '#/components/ui/button.tsx'
+
+function Sheet({ ...props }: SheetPrimitive.Root.Props) {
+  return <SheetPrimitive.Root data-slot="sheet" {...props} />
+}
+
+function SheetTrigger({ ...props }: SheetPrimitive.Trigger.Props) {
+  return <SheetPrimitive.Trigger data-slot="sheet-trigger" {...props} />
+}
+
+function SheetClose({ ...props }: SheetPrimitive.Close.Props) {
+  return <SheetPrimitive.Close data-slot="sheet-close" {...props} />
+}
+
+function SheetPortal({ ...props }: SheetPrimitive.Portal.Props) {
+  return <SheetPrimitive.Portal data-slot="sheet-portal" {...props} />
+}
+
+function SheetOverlay({ className, ...props }: SheetPrimitive.Backdrop.Props) {
+  return (
+    <SheetPrimitive.Backdrop
+      data-slot="sheet-overlay"
+      className={cn(
+        'fixed inset-0 z-50 bg-overlay transition-opacity duration-150 data-ending-style:opacity-0 data-starting-style:opacity-0 supports-backdrop-filter:backdrop-blur-xs',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SheetContent({
+  className,
+  children,
+  side = 'right',
+  showCloseButton = true,
+  keepMounted = false,
+  ...props
+}: SheetPrimitive.Popup.Props & {
+  side?: 'top' | 'right' | 'bottom' | 'left'
+  showCloseButton?: boolean
+  keepMounted?: boolean
+}) {
+  return (
+    <SheetPortal keepMounted={keepMounted}>
+      <SheetOverlay />
+      <SheetPrimitive.Popup
+        data-slot="sheet-content"
+        data-side={side}
+        className={cn(
+          'fixed z-50 flex flex-col gap-4 bg-popover bg-clip-padding text-sm text-popover-foreground shadow-lg transition duration-200 ease-in-out data-ending-style:opacity-0 data-starting-style:opacity-0 data-[side=bottom]:inset-x-0 data-[side=bottom]:bottom-0 data-[side=bottom]:h-auto data-[side=bottom]:border-t data-[side=bottom]:data-ending-style:translate-y-[2.5rem] data-[side=bottom]:data-starting-style:translate-y-[2.5rem] data-[side=left]:inset-y-0 data-[side=left]:left-0 data-[side=left]:h-full data-[side=left]:w-3/4 data-[side=left]:border-r data-[side=left]:data-ending-style:translate-x-[-2.5rem] data-[side=left]:data-starting-style:translate-x-[-2.5rem] data-[side=right]:inset-y-0 data-[side=right]:right-0 data-[side=right]:h-full data-[side=right]:w-3/4 data-[side=right]:border-l data-[side=right]:data-ending-style:translate-x-[2.5rem] data-[side=right]:data-starting-style:translate-x-[2.5rem] data-[side=top]:inset-x-0 data-[side=top]:top-0 data-[side=top]:h-auto data-[side=top]:border-b data-[side=top]:data-ending-style:translate-y-[-2.5rem] data-[side=top]:data-starting-style:translate-y-[-2.5rem] data-[side=left]:sm:max-w-sm data-[side=right]:sm:max-w-sm',
+          className,
+        )}
+        {...props}
+      >
+        {children}
+        {showCloseButton && (
+          <SheetPrimitive.Close
+            data-slot="sheet-close"
+            render={
+              <Button
+                variant="ghost"
+                className="absolute top-3 right-3"
+                size="icon-sm"
+              />
+            }
+          >
+            <XIcon />
+            <span className="sr-only">Close</span>
+          </SheetPrimitive.Close>
+        )}
+      </SheetPrimitive.Popup>
+    </SheetPortal>
+  )
+}
+
+function SheetHeader({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sheet-header"
+      className={cn('flex flex-col gap-0.5 p-4', className)}
+      {...props}
+    />
+  )
+}
+
+function SheetFooter({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sheet-footer"
+      className={cn('mt-auto flex flex-col gap-2 p-4', className)}
+      {...props}
+    />
+  )
+}
+
+function SheetTitle({ className, ...props }: SheetPrimitive.Title.Props) {
+  return (
+    <SheetPrimitive.Title
+      data-slot="sheet-title"
+      className={cn('text-base font-medium text-foreground', className)}
+      {...props}
+    />
+  )
+}
+
+function SheetDescription({
+  className,
+  ...props
+}: SheetPrimitive.Description.Props) {
+  return (
+    <SheetPrimitive.Description
+      data-slot="sheet-description"
+      className={cn('text-sm text-muted-foreground', className)}
+      {...props}
+    />
+  )
+}
+
+export {
+  Sheet,
+  SheetClose,
+  SheetContent,
+  SheetDescription,
+  SheetFooter,
+  SheetHeader,
+  SheetTitle,
+  SheetTrigger,
+}

src/components/ui/sidebar.tsx

@@ -0,0 +1,716 @@
+import { mergeProps } from '@base-ui/react/merge-props'
+import { useRender } from '@base-ui/react/use-render'
+import { cva, type VariantProps } from 'class-variance-authority'
+import { cn } from 'cn'
+import { PanelLeftIcon } from 'lucide-react'
+import * as React from 'react'
+import { Button } from '#/components/ui/button.tsx'
+import { Input } from '#/components/ui/input.tsx'
+import { Separator } from '#/components/ui/separator.tsx'
+import {
+  Sheet,
+  SheetContent,
+  SheetDescription,
+  SheetHeader,
+  SheetTitle,
+} from '#/components/ui/sheet.tsx'
+import { Skeleton } from '#/components/ui/skeleton.tsx'
+import {
+  Tooltip,
+  TooltipContent,
+  TooltipTrigger,
+} from '#/components/ui/tooltip.tsx'
+import { useIsMobile } from '#/hooks/use-mobile.ts'
+
+const SIDEBAR_WIDTH = '16rem'
+const SIDEBAR_WIDTH_MOBILE = 'min(25rem, 100vw)'
+const SIDEBAR_WIDTH_ICON = '3rem'
+const SIDEBAR_KEYBOARD_SHORTCUT = 'b'
+
+type SidebarContextProps = {
+  state: 'expanded' | 'collapsed'
+  open: boolean
+  setOpen: (open: boolean) => void
+  openMobile: boolean
+  setOpenMobile: (open: boolean) => void
+  isMobile: boolean
+  toggleSidebar: () => void
+}
+
+const SidebarContext = React.createContext<SidebarContextProps | null>(null)
+
+function useSidebar() {
+  const context = React.useContext(SidebarContext)
+  if (!context) {
+    throw new Error('useSidebar must be used within a SidebarProvider.')
+  }
+
+  return context
+}
+
+function SidebarProvider({
+  defaultOpen = true,
+  open: openProp,
+  onOpenChange: setOpenProp,
+  className,
+  style,
+  children,
+  ...props
+}: React.ComponentProps<'div'> & {
+  defaultOpen?: boolean
+  open?: boolean
+  onOpenChange?: (open: boolean) => void
+}) {
+  const isMobile = useIsMobile()
+  const [openMobile, setOpenMobile] = React.useState(false)
+
+  // This is the internal state of the sidebar.
+  // We use openProp and setOpenProp for control from outside the component.
+  const [_open, _setOpen] = React.useState(defaultOpen)
+  const open = openProp ?? _open
+  const setOpen = React.useCallback(
+    (value: boolean | ((value: boolean) => boolean)) => {
+      const openState = typeof value === 'function' ? value(open) : value
+      if (setOpenProp) {
+        setOpenProp(openState)
+      } else {
+        _setOpen(openState)
+      }
+    },
+    [setOpenProp, open],
+  )
+
+  // Helper to toggle the sidebar.
+  const toggleSidebar = React.useCallback(() => {
+    return isMobile ? setOpenMobile((open) => !open) : setOpen((open) => !open)
+  }, [isMobile, setOpen])
+
+  // Adds a keyboard shortcut to toggle the sidebar.
+  React.useEffect(() => {
+    const handleKeyDown = (event: KeyboardEvent) => {
+      if (
+        event.key === SIDEBAR_KEYBOARD_SHORTCUT &&
+        (event.metaKey || event.ctrlKey)
+      ) {
+        event.preventDefault()
+        toggleSidebar()
+      }
+    }
+
+    window.addEventListener('keydown', handleKeyDown)
+    return () => window.removeEventListener('keydown', handleKeyDown)
+  }, [toggleSidebar])
+
+  // We add a state so that we can do data-state="expanded" or "collapsed".
+  // This makes it easier to style the sidebar with Tailwind classes.
+  const state = open ? 'expanded' : 'collapsed'
+
+  const contextValue = React.useMemo<SidebarContextProps>(
+    () => ({
+      state,
+      open,
+      setOpen,
+      isMobile,
+      openMobile,
+      setOpenMobile,
+      toggleSidebar,
+    }),
+    [state, open, setOpen, isMobile, openMobile, toggleSidebar],
+  )
+
+  return (
+    <SidebarContext.Provider value={contextValue}>
+      <div
+        data-slot="sidebar-wrapper"
+        style={
+          {
+            '--sidebar-width': SIDEBAR_WIDTH,
+            '--sidebar-width-icon': SIDEBAR_WIDTH_ICON,
+            ...style,
+          } as React.CSSProperties
+        }
+        className={cn(
+          'group/sidebar-wrapper flex min-h-svh w-full has-data-[variant=inset]:bg-sidebar',
+          className,
+        )}
+        {...props}
+      >
+        {children}
+      </div>
+    </SidebarContext.Provider>
+  )
+}
+
+function Sidebar({
+  side = 'left',
+  variant = 'sidebar',
+  collapsible = 'offcanvas',
+  className,
+  children,
+  dir,
+  ...props
+}: React.ComponentProps<'div'> & {
+  side?: 'left' | 'right'
+  variant?: 'sidebar' | 'floating' | 'inset'
+  collapsible?: 'offcanvas' | 'icon' | 'none'
+}) {
+  const { isMobile, state, openMobile, setOpenMobile } = useSidebar()
+
+  if (collapsible === 'none') {
+    return (
+      <div
+        data-slot="sidebar"
+        className={cn(
+          'flex h-full w-(--sidebar-width) flex-col bg-sidebar text-sidebar-foreground',
+          className,
+        )}
+        {...props}
+      >
+        {children}
+      </div>
+    )
+  }
+
+  if (isMobile) {
+    return (
+      <Sheet open={openMobile} onOpenChange={setOpenMobile} {...props}>
+        <SheetContent
+          keepMounted
+          dir={dir}
+          data-sidebar="sidebar"
+          data-slot="sidebar"
+          data-mobile="true"
+          className="w-(--sidebar-width)! max-w-none! bg-sidebar p-0 text-sidebar-foreground [&>button]:hidden"
+          style={
+            {
+              '--sidebar-width': SIDEBAR_WIDTH_MOBILE,
+            } as React.CSSProperties
+          }
+          side={side}
+        >
+          <SheetHeader className="sr-only">
+            <SheetTitle>ワークスペース</SheetTitle>
+            <SheetDescription>調査チャットとデッキ管理</SheetDescription>
+          </SheetHeader>
+          <div className="flex h-full w-full flex-row">{children}</div>
+        </SheetContent>
+      </Sheet>
+    )
+  }
+
+  return (
+    <div
+      className="group peer hidden text-sidebar-foreground md:block"
+      data-state={state}
+      data-collapsible={state === 'collapsed' ? collapsible : ''}
+      data-variant={variant}
+      data-side={side}
+      data-slot="sidebar"
+    >
+      {/* This is what handles the sidebar gap on desktop */}
+      <div
+        data-slot="sidebar-gap"
+        className={cn(
+          'relative w-(--sidebar-width) bg-transparent transition-[width] duration-200 ease-linear',
+          'group-data-[collapsible=offcanvas]:w-0',
+          'group-data-[side=right]:rotate-180',
+          variant === 'floating' || variant === 'inset'
+            ? 'group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4)))]'
+            : 'group-data-[collapsible=icon]:w-(--sidebar-width-icon)',
+        )}
+      />
+      <div
+        data-slot="sidebar-container"
+        data-side={side}
+        className={cn(
+          'fixed inset-y-0 z-10 hidden h-svh w-(--sidebar-width) transition-[left,right,width] duration-200 ease-linear data-[side=left]:left-0 data-[side=left]:group-data-[collapsible=offcanvas]:left-[calc(var(--sidebar-width)*-1)] data-[side=right]:right-0 data-[side=right]:group-data-[collapsible=offcanvas]:right-[calc(var(--sidebar-width)*-1)] md:flex',
+          // Adjust the padding for floating and inset variants.
+          variant === 'floating' || variant === 'inset'
+            ? 'p-2 group-data-[collapsible=icon]:w-[calc(var(--sidebar-width-icon)+(--spacing(4))+2px)]'
+            : 'group-data-[collapsible=icon]:w-(--sidebar-width-icon) group-data-[side=left]:border-r group-data-[side=right]:border-l',
+          className,
+        )}
+        {...props}
+      >
+        <div
+          data-sidebar="sidebar"
+          data-slot="sidebar-inner"
+          className="flex size-full flex-col bg-sidebar group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:shadow-sm group-data-[variant=floating]:ring-1 group-data-[variant=floating]:ring-sidebar-border"
+        >
+          {children}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+function SidebarTrigger({
+  className,
+  onClick,
+  ...props
+}: React.ComponentProps<typeof Button>) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <Button
+      data-sidebar="trigger"
+      data-slot="sidebar-trigger"
+      variant="ghost"
+      size="icon-sm"
+      className={cn(className)}
+      onClick={(event) => {
+        onClick?.(event)
+        toggleSidebar()
+      }}
+      {...props}
+    >
+      <PanelLeftIcon />
+      <span className="sr-only">Toggle Sidebar</span>
+    </Button>
+  )
+}
+
+function SidebarRail({ className, ...props }: React.ComponentProps<'button'>) {
+  const { toggleSidebar } = useSidebar()
+
+  return (
+    <button
+      data-sidebar="rail"
+      data-slot="sidebar-rail"
+      aria-label="Toggle Sidebar"
+      tabIndex={-1}
+      onClick={toggleSidebar}
+      title="Toggle Sidebar"
+      className={cn(
+        'absolute inset-y-0 z-20 hidden w-4 transition-all ease-linear group-data-[side=left]:-right-4 group-data-[side=right]:left-0 after:absolute after:inset-y-0 after:start-1/2 after:w-[2px] hover:after:bg-sidebar-border sm:flex ltr:-translate-x-1/2 rtl:-translate-x-1/2',
+        'in-data-[side=left]:cursor-w-resize in-data-[side=right]:cursor-e-resize',
+        '[[data-side=left][data-state=collapsed]_&]:cursor-e-resize [[data-side=right][data-state=collapsed]_&]:cursor-w-resize',
+        'group-data-[collapsible=offcanvas]:translate-x-0 group-data-[collapsible=offcanvas]:after:left-full hover:group-data-[collapsible=offcanvas]:bg-sidebar',
+        '[[data-side=left][data-collapsible=offcanvas]_&]:-right-2',
+        '[[data-side=right][data-collapsible=offcanvas]_&]:-left-2',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInset({ className, ...props }: React.ComponentProps<'main'>) {
+  return (
+    <main
+      data-slot="sidebar-inset"
+      className={cn(
+        'relative flex w-full flex-1 flex-col bg-background md:peer-data-[variant=inset]:m-2 md:peer-data-[variant=inset]:ml-0 md:peer-data-[variant=inset]:rounded-xl md:peer-data-[variant=inset]:shadow-sm md:peer-data-[variant=inset]:peer-data-[state=collapsed]:ml-2',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarInput({
+  className,
+  ...props
+}: React.ComponentProps<typeof Input>) {
+  return (
+    <Input
+      data-slot="sidebar-input"
+      data-sidebar="input"
+      className={cn('h-8 w-full bg-background shadow-none', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarHeader({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-header"
+      data-sidebar="header"
+      className={cn('flex flex-col gap-2 p-2', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarFooter({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-footer"
+      data-sidebar="footer"
+      className={cn('flex flex-col gap-2 p-2', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarSeparator({
+  className,
+  ...props
+}: React.ComponentProps<typeof Separator>) {
+  return (
+    <Separator
+      data-slot="sidebar-separator"
+      data-sidebar="separator"
+      className={cn('mx-2 w-auto bg-sidebar-border', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarContent({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-content"
+      data-sidebar="content"
+      className={cn(
+        'no-scrollbar flex min-h-0 flex-1 flex-col gap-0 overflow-auto group-data-[collapsible=icon]:overflow-hidden',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroup({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-group"
+      data-sidebar="group"
+      className={cn('relative flex w-full min-w-0 flex-col p-2', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarGroupLabel({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<'div'> & React.ComponentProps<'div'>) {
+  return useRender({
+    defaultTagName: 'div',
+    props: mergeProps<'div'>(
+      {
+        className: cn(
+          'flex h-8 shrink-0 items-center rounded-md px-2 text-xs font-medium text-sidebar-foreground/70 ring-sidebar-ring outline-hidden transition-[margin,opacity] duration-200 ease-linear group-data-[collapsible=icon]:-mt-8 group-data-[collapsible=icon]:opacity-0 focus-visible:ring-2 [&>svg]:size-4 [&>svg]:shrink-0',
+          className,
+        ),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'sidebar-group-label',
+      sidebar: 'group-label',
+    },
+  })
+}
+
+function SidebarGroupAction({
+  className,
+  render,
+  ...props
+}: useRender.ComponentProps<'button'> & React.ComponentProps<'button'>) {
+  return useRender({
+    defaultTagName: 'button',
+    props: mergeProps<'button'>(
+      {
+        className: cn(
+          'absolute top-3.5 right-3 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0',
+          className,
+        ),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'sidebar-group-action',
+      sidebar: 'group-action',
+    },
+  })
+}
+
+function SidebarGroupContent({
+  className,
+  ...props
+}: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-group-content"
+      data-sidebar="group-content"
+      className={cn('w-full text-sm', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenu({ className, ...props }: React.ComponentProps<'ul'>) {
+  return (
+    <ul
+      data-slot="sidebar-menu"
+      data-sidebar="menu"
+      className={cn('flex w-full min-w-0 flex-col gap-0', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuItem({ className, ...props }: React.ComponentProps<'li'>) {
+  return (
+    <li
+      data-slot="sidebar-menu-item"
+      data-sidebar="menu-item"
+      className={cn('group/menu-item relative', className)}
+      {...props}
+    />
+  )
+}
+
+const sidebarMenuButtonVariants = cva(
+  'peer/menu-button group/menu-button flex w-full items-center gap-2 overflow-hidden rounded-md p-2 text-left text-sm ring-sidebar-ring outline-hidden transition-[width,height,padding] group-has-data-[sidebar=menu-action]/menu-item:pr-8 group-data-[collapsible=icon]:size-8! group-data-[collapsible=icon]:p-2! hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-open:hover:bg-sidebar-accent data-open:hover:text-sidebar-accent-foreground data-active:bg-sidebar-accent data-active:font-medium data-active:text-sidebar-accent-foreground [&_svg]:size-4 [&_svg]:shrink-0 [&>span:last-child]:truncate',
+  {
+    variants: {
+      variant: {
+        default: 'hover:bg-sidebar-accent hover:text-sidebar-accent-foreground',
+        outline:
+          'bg-background shadow-[0_0_0_1px_var(--sidebar-border)] hover:bg-sidebar-accent hover:text-sidebar-accent-foreground hover:shadow-[0_0_0_1px_var(--sidebar-accent)]',
+      },
+      size: {
+        default: 'h-8 text-sm',
+        sm: 'h-7 text-xs',
+        lg: 'h-12 text-sm group-data-[collapsible=icon]:p-0!',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+      size: 'default',
+    },
+  },
+)
+
+function SidebarMenuButton({
+  render,
+  isActive = false,
+  variant = 'default',
+  size = 'default',
+  tooltip,
+  className,
+  ...props
+}: useRender.ComponentProps<'button'> &
+  React.ComponentProps<'button'> & {
+    isActive?: boolean
+    tooltip?: string | React.ComponentProps<typeof TooltipContent>
+  } & VariantProps<typeof sidebarMenuButtonVariants>) {
+  const { isMobile, state } = useSidebar()
+  const comp = useRender({
+    defaultTagName: 'button',
+    props: mergeProps<'button'>(
+      {
+        className: cn(sidebarMenuButtonVariants({ variant, size }), className),
+      },
+      props,
+    ),
+    render: !tooltip ? render : <TooltipTrigger render={render} />,
+    state: {
+      slot: 'sidebar-menu-button',
+      sidebar: 'menu-button',
+      size,
+      active: isActive,
+    },
+  })
+
+  if (!tooltip) {
+    return comp
+  }
+
+  if (typeof tooltip === 'string') {
+    tooltip = {
+      children: tooltip,
+    }
+  }
+
+  return (
+    <Tooltip>
+      {comp}
+      <TooltipContent
+        side="right"
+        align="center"
+        hidden={state !== 'collapsed' || isMobile}
+        {...tooltip}
+      />
+    </Tooltip>
+  )
+}
+
+function SidebarMenuAction({
+  className,
+  render,
+  showOnHover = false,
+  ...props
+}: useRender.ComponentProps<'button'> &
+  React.ComponentProps<'button'> & {
+    showOnHover?: boolean
+  }) {
+  return useRender({
+    defaultTagName: 'button',
+    props: mergeProps<'button'>(
+      {
+        className: cn(
+          'absolute top-1.5 right-1 flex aspect-square w-5 items-center justify-center rounded-md p-0 text-sidebar-foreground ring-sidebar-ring outline-hidden transition-transform group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 after:absolute after:-inset-2 hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 md:after:hidden [&>svg]:size-4 [&>svg]:shrink-0',
+          showOnHover &&
+            'group-focus-within/menu-item:opacity-100 group-hover/menu-item:opacity-100 peer-data-active/menu-button:text-sidebar-accent-foreground aria-expanded:opacity-100 md:opacity-0',
+          className,
+        ),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'sidebar-menu-action',
+      sidebar: 'menu-action',
+    },
+  })
+}
+
+function SidebarMenuBadge({
+  className,
+  ...props
+}: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="sidebar-menu-badge"
+      data-sidebar="menu-badge"
+      className={cn(
+        'pointer-events-none absolute right-1 flex h-5 min-w-5 items-center justify-center rounded-md px-1 text-xs font-medium text-sidebar-foreground tabular-nums select-none group-data-[collapsible=icon]:hidden peer-hover/menu-button:text-sidebar-accent-foreground peer-data-[size=default]/menu-button:top-1.5 peer-data-[size=lg]/menu-button:top-2.5 peer-data-[size=sm]/menu-button:top-1 peer-data-active/menu-button:text-sidebar-accent-foreground',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSkeleton({
+  className,
+  showIcon = false,
+  ...props
+}: React.ComponentProps<'div'> & {
+  showIcon?: boolean
+}) {
+  // Random width between 50 to 90%.
+  const [width] = React.useState(() => {
+    return `${Math.floor(Math.random() * 40) + 50}%`
+  })
+
+  return (
+    <div
+      data-slot="sidebar-menu-skeleton"
+      data-sidebar="menu-skeleton"
+      className={cn('flex h-8 items-center gap-2 rounded-md px-2', className)}
+      {...props}
+    >
+      {showIcon && (
+        <Skeleton
+          className="size-4 rounded-md"
+          data-sidebar="menu-skeleton-icon"
+        />
+      )}
+      <Skeleton
+        className="h-4 max-w-(--skeleton-width) flex-1"
+        data-sidebar="menu-skeleton-text"
+        style={
+          {
+            '--skeleton-width': width,
+          } as React.CSSProperties
+        }
+      />
+    </div>
+  )
+}
+
+function SidebarMenuSub({ className, ...props }: React.ComponentProps<'ul'>) {
+  return (
+    <ul
+      data-slot="sidebar-menu-sub"
+      data-sidebar="menu-sub"
+      className={cn(
+        'mx-3.5 flex min-w-0 translate-x-px flex-col gap-1 border-l border-sidebar-border px-2.5 py-0.5 group-data-[collapsible=icon]:hidden',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubItem({
+  className,
+  ...props
+}: React.ComponentProps<'li'>) {
+  return (
+    <li
+      data-slot="sidebar-menu-sub-item"
+      data-sidebar="menu-sub-item"
+      className={cn('group/menu-sub-item relative', className)}
+      {...props}
+    />
+  )
+}
+
+function SidebarMenuSubButton({
+  render,
+  size = 'md',
+  isActive = false,
+  className,
+  ...props
+}: useRender.ComponentProps<'a'> &
+  React.ComponentProps<'a'> & {
+    size?: 'sm' | 'md'
+    isActive?: boolean
+  }) {
+  return useRender({
+    defaultTagName: 'a',
+    props: mergeProps<'a'>(
+      {
+        className: cn(
+          'flex h-7 min-w-0 -translate-x-px items-center gap-2 overflow-hidden rounded-md px-2 text-sidebar-foreground ring-sidebar-ring outline-hidden group-data-[collapsible=icon]:hidden hover:bg-sidebar-accent hover:text-sidebar-accent-foreground focus-visible:ring-2 active:bg-sidebar-accent active:text-sidebar-accent-foreground disabled:pointer-events-none disabled:opacity-50 aria-disabled:pointer-events-none aria-disabled:opacity-50 data-[size=md]:text-sm data-[size=sm]:text-xs data-active:bg-sidebar-accent data-active:text-sidebar-accent-foreground [&>span:last-child]:truncate [&>svg]:size-4 [&>svg]:shrink-0 [&>svg]:text-sidebar-accent-foreground',
+          className,
+        ),
+      },
+      props,
+    ),
+    render,
+    state: {
+      slot: 'sidebar-menu-sub-button',
+      sidebar: 'menu-sub-button',
+      size,
+      active: isActive,
+    },
+  })
+}
+
+export {
+  Sidebar,
+  SidebarContent,
+  SidebarFooter,
+  SidebarGroup,
+  SidebarGroupAction,
+  SidebarGroupContent,
+  SidebarGroupLabel,
+  SidebarHeader,
+  SidebarInput,
+  SidebarInset,
+  SidebarMenu,
+  SidebarMenuAction,
+  SidebarMenuBadge,
+  SidebarMenuButton,
+  SidebarMenuItem,
+  SidebarMenuSkeleton,
+  SidebarMenuSub,
+  SidebarMenuSubButton,
+  SidebarMenuSubItem,
+  SidebarProvider,
+  SidebarRail,
+  SidebarSeparator,
+  SidebarTrigger,
+  useSidebar,
+}

src/components/ui/skeleton.tsx

@@ -0,0 +1,13 @@
+import { cn } from 'cn'
+
+function Skeleton({ className, ...props }: React.ComponentProps<'div'>) {
+  return (
+    <div
+      data-slot="skeleton"
+      className={cn('animate-pulse rounded-md bg-muted', className)}
+      {...props}
+    />
+  )
+}
+
+export { Skeleton }

src/components/ui/textarea.tsx

@@ -0,0 +1,17 @@
+import { cn } from 'cn'
+import type * as React from 'react'
+
+function Textarea({ className, ...props }: React.ComponentProps<'textarea'>) {
+  return (
+    <textarea
+      data-slot="textarea"
+      className={cn(
+        'flex field-sizing-content min-h-16 w-full rounded-lg border border-input bg-transparent px-2.5 py-2 text-base transition-colors outline-none placeholder:text-muted-foreground focus-visible:border-ring focus-visible:ring-3 focus-visible:ring-ring/50 disabled:cursor-not-allowed disabled:bg-input/50 disabled:opacity-50 aria-invalid:border-destructive aria-invalid:ring-3 aria-invalid:ring-destructive/20 md:text-sm dark:bg-input/30 dark:disabled:bg-input/80 dark:aria-invalid:border-destructive/50 dark:aria-invalid:ring-destructive/40',
+        className,
+      )}
+      {...props}
+    />
+  )
+}
+
+export { Textarea }

src/components/ui/tooltip.tsx

@@ -0,0 +1,65 @@
+'use client'
+
+import { Tooltip as TooltipPrimitive } from '@base-ui/react/tooltip'
+import { cn } from 'cn'
+
+function TooltipProvider({
+  delay = 0,
+  ...props
+}: TooltipPrimitive.Provider.Props) {
+  return (
+    <TooltipPrimitive.Provider
+      data-slot="tooltip-provider"
+      delay={delay}
+      {...props}
+    />
+  )
+}
+
+function Tooltip({ ...props }: TooltipPrimitive.Root.Props) {
+  return <TooltipPrimitive.Root data-slot="tooltip" {...props} />
+}
+
+function TooltipTrigger({ ...props }: TooltipPrimitive.Trigger.Props) {
+  return <TooltipPrimitive.Trigger data-slot="tooltip-trigger" {...props} />
+}
+
+function TooltipContent({
+  className,
+  side = 'top',
+  sideOffset = 4,
+  align = 'center',
+  alignOffset = 0,
+  children,
+  ...props
+}: TooltipPrimitive.Popup.Props &
+  Pick<
+    TooltipPrimitive.Positioner.Props,
+    'align' | 'alignOffset' | 'side' | 'sideOffset'
+  >) {
+  return (
+    <TooltipPrimitive.Portal>
+      <TooltipPrimitive.Positioner
+        align={align}
+        alignOffset={alignOffset}
+        side={side}
+        sideOffset={sideOffset}
+        className="isolate z-50"
+      >
+        <TooltipPrimitive.Popup
+          data-slot="tooltip-content"
+          className={cn(
+            'z-50 inline-flex w-fit max-w-xs origin-(--transform-origin) items-center gap-1.5 rounded-md bg-foreground px-3 py-1.5 text-xs text-background has-data-[slot=kbd]:pr-1.5 data-[side=bottom]:slide-in-from-top-2 data-[side=inline-end]:slide-in-from-left-2 data-[side=inline-start]:slide-in-from-right-2 data-[side=left]:slide-in-from-right-2 data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2 **:data-[slot=kbd]:relative **:data-[slot=kbd]:isolate **:data-[slot=kbd]:z-50 **:data-[slot=kbd]:rounded-sm data-[state=delayed-open]:animate-in data-[state=delayed-open]:fade-in-0 data-[state=delayed-open]:zoom-in-95 data-open:animate-in data-open:fade-in-0 data-open:zoom-in-95 data-closed:animate-out data-closed:fade-out-0 data-closed:zoom-out-95',
+            className,
+          )}
+          {...props}
+        >
+          {children}
+          <TooltipPrimitive.Arrow className="z-50 size-2.5 translate-y-[calc(-50%-2px)] rotate-45 rounded-[2px] bg-foreground fill-foreground data-[side=bottom]:top-1 data-[side=inline-end]:top-1/2! data-[side=inline-end]:-left-1 data-[side=inline-end]:-translate-y-1/2 data-[side=inline-start]:top-1/2! data-[side=inline-start]:-right-1 data-[side=inline-start]:-translate-y-1/2 data-[side=left]:top-1/2! data-[side=left]:-right-1 data-[side=left]:-translate-y-1/2 data-[side=right]:top-1/2! data-[side=right]:-left-1 data-[side=right]:-translate-y-1/2 data-[side=top]:-bottom-2.5" />
+        </TooltipPrimitive.Popup>
+      </TooltipPrimitive.Positioner>
+    </TooltipPrimitive.Portal>
+  )
+}
+
+export { Tooltip, TooltipContent, TooltipProvider, TooltipTrigger }

src/features/connections/connection-manager.css

@@ -5,7 +5,7 @@
 .connection-manager-description,
 .connection-manager-note {
   margin: 0;
-  color: #aab8c2;
+  color: var(--muted-foreground);
   font-size: 0.875rem;
 }
 .connection-manager-list {
@@ -21,7 +21,7 @@
   justify-content: space-between;
   gap: 0.75rem;
   padding-block: 0.75rem;
-  border-bottom: 1px solid #38444d;
+  border-bottom: 1px solid var(--border);
 }
 .connection-manager-account {
   display: grid;
@@ -29,15 +29,9 @@
   min-width: 0;
   overflow-wrap: anywhere;
 }
-.connection-manager-account > span {
+.connection-manager-account > span:not([data-slot="badge"]) {
   font-size: 0.8rem;
-  color: #aab8c2;
-}
-.connection-manager-account > .connection-manager-status-connected {
-  color: #71d6ad;
-}
-.connection-manager-account > .connection-manager-status-expired {
-  color: #f2c66d;
+  color: var(--muted-foreground);
 }
 .connection-manager-actions {
   display: flex;
@@ -53,18 +47,6 @@
   margin: 0;
   font-size: 1rem;
 }
-.connection-manager select {
-  width: 100%;
-  min-width: 0;
-  background: #15202b;
-  color: #e7e9ea;
-  border: 1px solid #536471;
-  border-radius: 0.25rem;
-  padding: 0.6rem;
-}
-.connection-manager button {
-  min-height: 2.5rem;
-}
 @media (max-width: 480px) {
   .connection-manager-list > li {
     align-items: flex-start;

src/features/connections/connection-manager.tsx

@@ -1,6 +1,10 @@
 import { useQuery } from '@tanstack/react-query'
 import { useServerFn } from '@tanstack/react-start'
 import { useId, useState } from 'react'
+import { Badge } from '#/components/ui/badge'
+import { Button } from '#/components/ui/button'
+import { Label } from '#/components/ui/label'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import {
   disconnectMastodonAccount,
   loadMastodonInstances,
@@ -92,15 +96,18 @@ export function ConnectionManager({
                   {connection.platform === 'twitter' ? 'Twitter' : 'Mastodon'} ·{' '}
                   {new URL(connection.origin).hostname}
                 </span>
-                <span
-                  className={`connection-manager-status connection-manager-status-${connection.status}`}
+                <Badge
+                  variant={
+                    connection.status === 'connected' ? 'secondary' : 'outline'
+                  }
                 >
                   {statusNames[connection.status]}
-                </span>
+                </Badge>
               </div>
               {connection.platform === 'mastodon' && (
                 <div className="connection-manager-actions">
-                  <button
+                  <Button
+                    variant="outline"
                     type="button"
                     disabled={busy}
                     aria-label={`${connection.displayName}を再接続`}
@@ -109,16 +116,17 @@ export function ConnectionManager({
                     }
                   >
                     再接続
-                  </button>
+                  </Button>
                   {connection.status !== 'disconnected' && (
-                    <button
+                    <Button
+                      variant="destructive"
                       type="button"
                       disabled={busy}
                       aria-label={`${connection.displayName}の接続を解除`}
                       onClick={() => void remove(connection.id)}
                     >
                       接続解除
-                    </button>
+                    </Button>
                   )}
                 </div>
               )}
@@ -139,30 +147,35 @@ export function ConnectionManager({
         ) : instances.isError ? (
           <p role="alert">
             接続先を取得できませんでした。
-            <button type="button" onClick={() => void instances.refetch()}>
+            <Button
+              variant="outline"
+              type="button"
+              onClick={() => void instances.refetch()}
+            >
               再試行
-            </button>
+            </Button>
           </p>
         ) : instances.data.origins.length === 0 ? (
           <p>利用するMastodonサーバーがまだ設定されていません。</p>
         ) : (
           <>
-            <label htmlFor={selectId}>Mastodonサーバー</label>
-            <select
+            <Label htmlFor={selectId}>Mastodonサーバー</Label>
+            <NativeSelect
+              className="w-full"
               id={selectId}
               value={origin}
               onChange={(event) => setSelected(event.target.value)}
               disabled={busy}
             >
               {instances.data.origins.map((value) => (
-                <option key={value} value={value}>
+                <NativeSelectOption key={value} value={value}>
                   {new URL(value).hostname}
-                </option>
+                </NativeSelectOption>
               ))}
-            </select>
-            <button type="submit" disabled={busy || !origin}>
+            </NativeSelect>
+            <Button type="submit" disabled={busy || !origin}>
               Mastodonで認可する
-            </button>
+            </Button>
           </>
         )}
         {hasTemporaryDecks && (

src/features/decks/column-editor.test.tsx

@@ -162,7 +162,7 @@ it('preserves title and Twitter search options after a rejected save', async ()
   fireEvent.change(screen.getByLabelText('表示順'), {
     target: { value: 'Top' },
   })
-  fireEvent.click(screen.getByLabelText('フォロー中のみ'))
+  fireEvent.click(screen.getByRole('checkbox', { name: 'フォロー中のみ' }))
   fireEvent.submit(screen.getByRole('form', { name: 'カラムを追加' }))
   await waitFor(() => expect(save).toHaveBeenCalledOnce())
   expect(screen.getByLabelText('カラム名')).toHaveValue('調査')
@@ -170,7 +170,7 @@ it('preserves title and Twitter search options after a rejected save', async ()
     'from:owner WebMCP',
   )
   expect(screen.getByLabelText('表示順')).toHaveValue('Top')
-  expect(screen.getByLabelText('フォロー中のみ')).toBeChecked()
+  expect(screen.getByRole('checkbox', { name: 'フォロー中のみ' })).toBeChecked()
   fireEvent.submit(screen.getByRole('form', { name: 'カラムを追加' }))
   await waitFor(() => expect(save).toHaveBeenCalledTimes(2))
   expect(save.mock.calls[1]?.[0].source).toEqual(save.mock.calls[0]?.[0].source)

src/features/decks/column-editor.tsx

@@ -1,4 +1,8 @@
 import { useId, useState } from 'react'
+import { Button } from '#/components/ui/button'
+import { Input } from '#/components/ui/input'
+import { Label } from '#/components/ui/label'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import type { Connection } from '#/features/connections/model'
 import {
   ColumnSourceEditor,
@@ -60,9 +64,9 @@ export function ColumnEditor({
       }}
     >
       <div className="deck-editor-fields">
-        <label htmlFor={`${formId}-title`}>
+        <Label htmlFor={`${formId}-title`}>
           カラム名
-          <input
+          <Input
             id={`${formId}-title`}
             name="title"
             defaultValue={column?.title ?? ''}
@@ -70,10 +74,11 @@ export function ColumnEditor({
             placeholder="例：発表元の投稿"
             required
           />
-        </label>
-        <label htmlFor={`${formId}-profile`}>
+        </Label>
+        <Label htmlFor={`${formId}-profile`}>
           接続プロファイル
-          <select
+          <NativeSelect
+            className="w-full"
             id={`${formId}-profile`}
             value={connectionId}
             required
@@ -86,22 +91,22 @@ export function ColumnEditor({
               setSource(rebindColumnSource(source, connection.platform))
             }}
           >
-            <option value="" disabled>
+            <NativeSelectOption value="" disabled>
               選択してください
-            </option>
+            </NativeSelectOption>
             {connectionId && !validConnection && (
-              <option value={connectionId} disabled>
+              <NativeSelectOption value={connectionId} disabled>
                 {connectionId}（利用不可）
-              </option>
+              </NativeSelectOption>
             )}
             {available.map((connection) => (
-              <option key={connection.id} value={connection.id}>
+              <NativeSelectOption key={connection.id} value={connection.id}>
                 {connection.displayName}
                 {connection.platform === 'mastodon' ? ' · Mastodon' : ''}
-              </option>
+              </NativeSelectOption>
             ))}
-          </select>
-        </label>
+          </NativeSelect>
+        </Label>
       </div>
       <ColumnSourceEditor
         source={source}
@@ -117,16 +122,12 @@ export function ColumnEditor({
         </p>
       )}
       <div className="deck-actions">
-        <button
-          type="submit"
-          className="deck-primary"
-          disabled={!validConnection}
-        >
+        <Button type="submit" disabled={!validConnection}>
           {column ? '変更を保存' : '追加して検索'}
-        </button>
-        <button type="button" onClick={onCancel}>
+        </Button>
+        <Button variant="outline" type="button" onClick={onCancel}>
           キャンセル
-        </button>
+        </Button>
       </div>
     </form>
   )

src/features/decks/deck-column.tsx

@@ -1,4 +1,13 @@
 import { Icon } from '#/components/icon'
+import { Badge } from '#/components/ui/badge'
+import { Button } from '#/components/ui/button'
+import {
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuSeparator,
+  DropdownMenuTrigger,
+} from '#/components/ui/dropdown-menu'
 import {
   flattenResearchPages,
   useResearchFeed,
@@ -53,8 +62,9 @@ export function ResearchColumn({
         <div className="deck-column-title">
           <PlatformIcon platform={column.source.platform} />
           <h2 id={headingId}>{column.title}</h2>
-          <button
-            className="icon-button"
+          <Button
+            variant="ghost"
+            size="icon-sm"
             aria-label="更新"
             title="更新"
             type="button"
@@ -62,55 +72,46 @@ export function ResearchColumn({
             disabled={query.isFetching}
           >
             <Icon name="refresh" />
-          </button>
-          <details className="column-menu">
-            <summary
-              className="icon-button"
-              aria-label={`${column.title}の操作`}
-              title="カラムの操作"
+          </Button>
+          <DropdownMenu>
+            <DropdownMenuTrigger
+              render={
+                <Button
+                  variant="ghost"
+                  size="icon-sm"
+                  aria-label={`${column.title}の操作`}
+                  title="カラムの操作"
+                />
+              }
             >
               <Icon name="more" />
-            </summary>
-            <div className="column-menu-panel">
-              <button type="button" onClick={onEdit}>
-                編集
-              </button>
-              <button
-                type="button"
-                onClick={(event) => {
-                  onMove(-1)
-                  event.currentTarget
-                    .closest('details')
-                    ?.removeAttribute('open')
-                }}
+            </DropdownMenuTrigger>
+            <DropdownMenuContent align="end">
+              <DropdownMenuItem onClick={onEdit}>編集</DropdownMenuItem>
+              <DropdownMenuItem
+                onClick={() => onMove(-1)}
                 disabled={first}
                 aria-label={`${column.title}を左へ`}
               >
                 ← 左へ移動
-              </button>
-              <button
-                type="button"
-                onClick={(event) => {
-                  onMove(1)
-                  event.currentTarget
-                    .closest('details')
-                    ?.removeAttribute('open')
-                }}
+              </DropdownMenuItem>
+              <DropdownMenuItem
+                onClick={() => onMove(1)}
                 disabled={last}
                 aria-label={`${column.title}を右へ`}
               >
                 右へ移動 →
-              </button>
-              <button
-                type="button"
-                className="danger"
+              </DropdownMenuItem>
+              <DropdownMenuSeparator />
+              <DropdownMenuItem
+                variant="destructive"
                 onClick={onRemove}
                 aria-label={`${column.title}を削除`}
               >
                 カラムを削除
-              </button>
-            </div>
-          </details>
+              </DropdownMenuItem>
+            </DropdownMenuContent>
+          </DropdownMenu>
         </div>
         <div className="deck-column-label">
           <span
@@ -118,10 +119,10 @@ export function ResearchColumn({
           >
             {connectionLabel ?? '接続が見つかりません'}
           </span>
-          <span className="deck-source-label">
+          <Badge variant="outline" className="deck-source-label">
             <Icon name={column.source.kind} />
             {sourceDescription.label}
-          </span>
+          </Badge>
         </div>
         <p className="deck-query">{sourceDescription.query}</p>
         <p className="deck-column-status" role="status">
@@ -152,7 +153,8 @@ export function ResearchColumn({
           <div className="deck-message" role="alert">
             <p>{error.message}</p>
             {error.retryable ? (
-              <button
+              <Button
+                variant="outline"
                 type="button"
                 disabled={query.isFetching}
                 onClick={() =>
@@ -162,7 +164,7 @@ export function ResearchColumn({
                 }
               >
                 再試行
-              </button>
+              </Button>
             ) : null}
           </div>
         ) : null}
@@ -171,13 +173,14 @@ export function ResearchColumn({
         ) : null}
         {query.hasNextPage && !query.isFetchNextPageError ? (
           <div className="deck-message">
-            <button
+            <Button
+              variant="outline"
               type="button"
               disabled={query.isFetching}
               onClick={() => void query.fetchNextPage({ cancelRefetch: false })}
             >
               続きを読み込む
-            </button>
+            </Button>
           </div>
         ) : null}
         {!query.isPending &&

src/features/decks/deck-page.tsx

@@ -5,6 +5,16 @@ import { useRef, useState } from 'react'
 import { AppShell } from '#/components/app-shell'
 import { Dialog } from '#/components/dialog'
 import { Icon } from '#/components/icon'
+import { Button } from '#/components/ui/button'
+import {
+  Empty,
+  EmptyContent,
+  EmptyDescription,
+  EmptyHeader,
+  EmptyMedia,
+  EmptyTitle,
+} from '#/components/ui/empty'
+import { Input } from '#/components/ui/input'
 import { ConnectionManager } from '#/features/connections/connection-manager'
 import { loadConnections } from '#/features/connections/server-functions'
 import { syncResearchDeck } from '#/features/research/research-deck-sync'
@@ -32,7 +42,9 @@ export function DeckPage() {
   const [editing, setEditing] = useState<{ id: string } | 'new' | null>(null)
   const [renaming, setRenaming] = useState(false)
   const [managingConnections, setManagingConnections] = useState(false)
-  const [switcherEditing, setSwitcherEditing] = useState(false)
+  const [deckDialog, setDeckDialog] = useState<'create' | 'delete' | null>(null)
+  const [newDeckTitle, setNewDeckTitle] = useState('')
+  const switcherEditing = deckDialog !== null
   const {
     deck,
     workspace,
@@ -83,6 +95,8 @@ export function DeckPage() {
   })
 
   function clearEditors() {
+    setDeckDialog(null)
+    setNewDeckTitle('')
     setEditing(null)
     setRenaming(false)
     setRemoved(undefined)
@@ -102,312 +116,357 @@ export function DeckPage() {
     return saved
   }
 
+  const storageErrorNotice = storageError ? (
+    <p className="deck-error" role="alert">
+      {storageError}
+      <Button
+        variant="outline"
+        type="button"
+        disabled={saving}
+        onClick={() => {
+          clearEditors()
+          void refresh(true)
+        }}
+      >
+        最新のデッキを再読み込み
+      </Button>
+    </p>
+  ) : null
+
   return (
-    <AppShell
-      researchChat={
-        <ResearchPanel
-          onNavigateCitation={citationNavigation.navigate}
-          ready={ready}
-          contextDeck={{
-            id: deck.id,
-            title: deck.title,
-            columns: deck.columns,
-          }}
-          connections={profiles.data?.connections ?? []}
-          onOpenDeck={async (plan, activate = false) => {
-            await syncResearchDeck(plan, activate, researchDeckBindings, {
-              getWorkspace,
-              createTemporary,
-              save,
-              select,
-            })
-            if (activate) clearEditors()
-          }}
-        />
-      }
-      sidebar={
-        <>
-          <DeckSwitcher
-            key={deck.id}
-            decks={workspace.decks}
-            activeId={deck.id}
-            ready={ready && !saving}
-            onEditingChange={setSwitcherEditing}
-            onSelect={(id) => {
-              select(id)
-              clearEditors()
-            }}
-            onCreate={async (title) => {
-              const saved = await create(title)
-              if (saved) clearEditors()
-              return saved
-            }}
-            onDelete={async () => {
-              const saved = await remove(deck.id)
-              if (saved) clearEditors()
-              return saved
-            }}
-          />
-          <button
-            className="deck-primary sidebar-add"
-            aria-label="カラムを追加"
-            title="カラムを追加"
-            type="button"
-            disabled={!ready || saving || deck.columns.length >= MAX_COLUMNS}
-            onClick={() => setEditing('new')}
-          >
-            <Icon name="plus" />
-            <span>カラムを追加</span>
-          </button>
-          <p className="sidebar-note">
-            {deck.persisted
-              ? 'サーバーに保存・端末間で共有'
-              : '一時ビュー · このタブのみ'}
-          </p>
-          <button
-            type="button"
-            disabled={!ready}
-            onClick={() => setManagingConnections(true)}
-          >
-            接続アカウントを管理
-          </button>
-        </>
-      }
+    <ResearchPanel
+      onNavigateCitation={citationNavigation.navigate}
+      ready={ready}
+      contextDeck={{
+        id: deck.id,
+        title: deck.title,
+        columns: deck.columns,
+      }}
+      connections={profiles.data?.connections ?? []}
+      onOpenDeck={async (plan, activate = false) => {
+        await syncResearchDeck(plan, activate, researchDeckBindings, {
+          getWorkspace,
+          createTemporary,
+          save,
+          select,
+        })
+        if (activate) clearEditors()
+      }}
     >
-      <div className="deck-heading">
-        <div>
-          <h1>{deck.title}</h1>
-          <span className="deck-count">
-            {deck.columns.length} / {MAX_COLUMNS} カラム
-          </span>
-        </div>
-        <div className="deck-actions">
-          {deck.persisted ? (
-            <button
-              type="button"
-              disabled={saving}
-              onClick={() => {
-                createTemporary(`${deck.title}のコピー`, deck.columns)
-                clearEditors()
-              }}
-            >
-              一時コピーを作成
-            </button>
-          ) : (
-            <button
-              type="button"
-              disabled={!ready || saving}
-              onClick={() => void persist(deck.id)}
-            >
-              デッキとして保存
-            </button>
-          )}
-          <button
-            className="icon-button"
-            aria-label="名前を変更"
-            title="名前を変更"
-            type="button"
-            disabled={!ready || saving}
-            onClick={() => setRenaming(!renaming)}
-          >
-            <Icon name="edit" />
-          </button>
-        </div>
-      </div>
-      {saving ? (
-        <p className="deck-save-status" role="status">
-          保存しています…
-        </p>
-      ) : null}
-      {legacyAvailable ? (
-        <p className="deck-save-status">
-          このブラウザに旧デッキがあります。
-          <button
-            type="button"
-            disabled={saving || !profiles.data}
-            onClick={() => void importLegacy()}
-          >
-            旧デッキを取り込む
-          </button>
-        </p>
-      ) : null}
-      {!ready ? (
-        <p className="deck-save-status" role="status">
-          デッキを読み込んでいます…
-        </p>
-      ) : null}
-      {profiles.isError ? (
-        <p role="alert" className="deck-error">
-          接続プロファイルを取得できませんでした。
-          <button type="button" onClick={() => void profiles.refetch()}>
-            再試行
-          </button>
-        </p>
-      ) : null}
-      {oauthResult === 'failed' ? (
-        <p className="deck-error" role="alert">
-          Mastodonの認可を完了できませんでした。接続アカウントからやり直してください。
-        </p>
-      ) : null}
-      {oauthResult === 'connected' ? (
-        <p className="deck-save-status" role="status">
-          Mastodonアカウントを接続しました。カラムの接続先に選べます。
-        </p>
-      ) : null}
-      {profiles.data?.relayError ? (
-        <p className="deck-error" role="alert">
-          {profiles.data.relayError}
-        </p>
-      ) : null}
-      {managingConnections ? (
-        <Dialog
-          title="接続アカウント"
-          onClose={() => setManagingConnections(false)}
-        >
-          <ConnectionManager
-            connections={profiles.data?.connections ?? []}
-            onChanged={() => profiles.refetch()}
-            hasTemporaryDecks={workspace.decks.some((deck) => !deck.persisted)}
-          />
-        </Dialog>
-      ) : null}
-      {profiles.isPending ? (
-        <p role="status">接続プロファイルを取得しています…</p>
-      ) : null}
-      {storageError ? (
-        <p className="deck-error" role="alert">
-          {storageError}
-          <button
-            type="button"
-            disabled={saving}
-            onClick={() => {
-              clearEditors()
-              void refresh(true)
-            }}
-          >
-            最新のデッキを再読み込み
-          </button>
-        </p>
-      ) : null}
-      {renaming ? (
-        <Dialog title="デッキ名を変更" onClose={() => setRenaming(false)}>
-          <form
-            className="deck-rename"
-            onSubmit={async (event) => {
-              event.preventDefault()
-              const title = String(
-                new FormData(event.currentTarget).get('title') ?? '',
-              ).trim()
-              if (!title) return
-              if (await save({ ...deck, title })) setRenaming(false)
-            }}
-          >
-            <label htmlFor="deck-title">
-              調査テーマ・デッキ名
-              <input
-                id="deck-title"
-                name="title"
-                defaultValue={deck.title}
-                maxLength={120}
-                required
+      {(renderResearchPanel) => (
+        <AppShell
+          researchChat={renderResearchPanel}
+          sidebar={
+            <>
+              <DeckSwitcher
+                key={deck.id}
+                errorNotice={storageErrorNotice}
+                decks={workspace.decks}
+                activeId={deck.id}
+                ready={ready && !saving}
+                dialog={deckDialog}
+                newTitle={newDeckTitle}
+                onNewTitleChange={setNewDeckTitle}
+                onDialogChange={(dialog) => {
+                  setDeckDialog(dialog)
+                  if (dialog !== 'create') setNewDeckTitle('')
+                }}
+                onSelect={(id) => {
+                  select(id)
+                  clearEditors()
+                }}
+                onCreate={async (title) => {
+                  const saved = await create(title)
+                  if (saved) clearEditors()
+                  return saved
+                }}
+                onDelete={async () => {
+                  const saved = await remove(deck.id)
+                  if (saved) clearEditors()
+                  return saved
+                }}
               />
-            </label>
-            <button type="submit">名前を保存</button>
-          </form>
-        </Dialog>
-      ) : null}
-      {editing !== null ? (
-        <Dialog
-          title={editing === 'new' ? 'カラムを追加' : 'カラムを編集'}
-          onClose={() => setEditing(null)}
+              <Button
+                className="w-full"
+                aria-label="カラムを追加"
+                title="カラムを追加"
+                type="button"
+                disabled={
+                  !ready || saving || deck.columns.length >= MAX_COLUMNS
+                }
+                onClick={() => setEditing('new')}
+              >
+                <Icon name="plus" />
+                <span>カラムを追加</span>
+              </Button>
+              <p className="sidebar-note">
+                {deck.persisted
+                  ? 'サーバーに保存・端末間で共有'
+                  : '一時ビュー · このタブのみ'}
+              </p>
+              <Button
+                variant="outline"
+                type="button"
+                disabled={!ready}
+                onClick={() => setManagingConnections(true)}
+              >
+                接続アカウントを管理
+              </Button>
+            </>
+          }
         >
-          <ColumnEditor
-            key={`${deck.id}-${editing === 'new' ? 'new' : editing.id}`}
-            connections={profiles.data?.connections ?? []}
-            column={
-              editing === 'new'
-                ? undefined
-                : deck.columns.find((column) => column.id === editing.id)
-            }
-            onSave={saveColumn}
-            onCancel={() => setEditing(null)}
-          />
-        </Dialog>
-      ) : null}
-      {removed ? (
-        <div className="deck-undo" role="status">
-          <span>「{removed.column.title}」を削除しました。</span>
-          <button
-            type="button"
-            disabled={deck.columns.length >= MAX_COLUMNS || editing === 'new'}
-            onClick={async () => {
-              const columns = [...deck.columns]
-              columns.splice(removed.index, 0, removed.column)
-              if (await save({ ...deck, columns })) setRemoved(undefined)
-            }}
-          >
-            元に戻す
-          </button>
-        </div>
-      ) : null}
-      {ready && deck.columns.length === 0 && editing === null ? (
-        <div className="deck-empty">
-          <Icon name="columns" />
-          <h2>調べたいことから、デッキを作りましょう</h2>
-          <p>
-            チャットでAIに調べたいことを伝えると、調査に合ったカラムを作成します。
-            検索・ユーザー投稿・リストのカラムを手動で追加することもできます。
-          </p>
-          <button
-            className="deck-primary"
-            type="button"
-            onClick={() => setEditing('new')}
-          >
-            手動でカラムを追加
-          </button>
-        </div>
-      ) : null}
-      {ready && deck.columns.length > 0 ? (
-        // biome-ignore lint/a11y/noNoninteractiveTabindex: Keyboard users must be able to scroll the column board.
-        <section className="deck-board" aria-label="調査カラム" tabIndex={0}>
-          {deck.columns.map((column, index) => (
-            <ResearchColumn
-              key={`${deck.id}:${column.id}`}
-              registry={registry}
-              column={column}
-              citation={
-                citationNavigation.target?.deckId === deck.id &&
-                citationNavigation.target.column.id === column.id &&
-                sameCitationSource(citationNavigation.target.column, column)
-                  ? citationNavigation.target
-                  : undefined
-              }
-              connectionLabel={
-                profiles.data?.connections.find(
-                  (connection) => connection.id === column.connectionId,
-                )?.displayName
-              }
-              first={index === 0}
-              last={index === deck.columns.length - 1}
-              onEdit={() => setEditing({ id: column.id })}
-              onMove={(direction) =>
-                save(moveColumn(deck, column.id, direction))
-              }
-              onRemove={async () => {
-                const saved = await save({
-                  ...deck,
-                  columns: deck.columns.filter(
-                    (current) => current.id !== column.id,
-                  ),
-                })
-                if (saved) setRemoved({ column, index })
-                if (typeof editing === 'object' && editing?.id === column.id)
-                  setEditing(null)
-              }}
-            />
-          ))}
-        </section>
-      ) : null}
-    </AppShell>
+          <div className="deck-heading">
+            <div>
+              <h1>{deck.title}</h1>
+              <span className="deck-count">
+                {deck.columns.length} / {MAX_COLUMNS} カラム
+              </span>
+            </div>
+            <div className="deck-actions">
+              {deck.persisted ? (
+                <Button
+                  variant="outline"
+                  type="button"
+                  disabled={saving}
+                  onClick={() => {
+                    createTemporary(`${deck.title}のコピー`, deck.columns)
+                    clearEditors()
+                  }}
+                >
+                  一時コピーを作成
+                </Button>
+              ) : (
+                <Button
+                  variant="outline"
+                  type="button"
+                  disabled={!ready || saving}
+                  onClick={() => void persist(deck.id)}
+                >
+                  デッキとして保存
+                </Button>
+              )}
+              <Button
+                variant="outline"
+                className="icon-button"
+                aria-label="名前を変更"
+                title="名前を変更"
+                type="button"
+                disabled={!ready || saving}
+                onClick={() => setRenaming(!renaming)}
+              >
+                <Icon name="edit" />
+              </Button>
+            </div>
+          </div>
+          {saving ? (
+            <p className="deck-save-status" role="status">
+              保存しています…
+            </p>
+          ) : null}
+          {legacyAvailable ? (
+            <p className="deck-save-status">
+              このブラウザに旧デッキがあります。
+              <Button
+                variant="outline"
+                type="button"
+                disabled={saving || !profiles.data}
+                onClick={() => void importLegacy()}
+              >
+                旧デッキを取り込む
+              </Button>
+            </p>
+          ) : null}
+          {!ready ? (
+            <p className="deck-save-status" role="status">
+              デッキを読み込んでいます…
+            </p>
+          ) : null}
+          {profiles.isError ? (
+            <p role="alert" className="deck-error">
+              接続プロファイルを取得できませんでした。
+              <Button
+                variant="outline"
+                type="button"
+                onClick={() => void profiles.refetch()}
+              >
+                再試行
+              </Button>
+            </p>
+          ) : null}
+          {oauthResult === 'failed' ? (
+            <p className="deck-error" role="alert">
+              Mastodonの認可を完了できませんでした。接続アカウントからやり直してください。
+            </p>
+          ) : null}
+          {oauthResult === 'connected' ? (
+            <p className="deck-save-status" role="status">
+              Mastodonアカウントを接続しました。カラムの接続先に選べます。
+            </p>
+          ) : null}
+          {profiles.data?.relayError ? (
+            <p className="deck-error" role="alert">
+              {profiles.data.relayError}
+            </p>
+          ) : null}
+          {managingConnections ? (
+            <Dialog
+              title="接続アカウント"
+              onClose={() => setManagingConnections(false)}
+            >
+              <ConnectionManager
+                connections={profiles.data?.connections ?? []}
+                onChanged={() => profiles.refetch()}
+                hasTemporaryDecks={workspace.decks.some(
+                  (deck) => !deck.persisted,
+                )}
+              />
+            </Dialog>
+          ) : null}
+          {profiles.isPending ? (
+            <p role="status">接続プロファイルを取得しています…</p>
+          ) : null}
+          {!renaming && editing === null && !switcherEditing
+            ? storageErrorNotice
+            : null}
+          {renaming ? (
+            <Dialog title="デッキ名を変更" onClose={() => setRenaming(false)}>
+              <form
+                className="deck-rename"
+                onSubmit={async (event) => {
+                  event.preventDefault()
+                  const title = String(
+                    new FormData(event.currentTarget).get('title') ?? '',
+                  ).trim()
+                  if (!title) return
+                  if (await save({ ...deck, title })) setRenaming(false)
+                }}
+              >
+                <label htmlFor="deck-title">
+                  調査テーマ・デッキ名
+                  <Input
+                    id="deck-title"
+                    name="title"
+                    defaultValue={deck.title}
+                    maxLength={120}
+                    required
+                  />
+                </label>
+                <Button variant="outline" type="submit">
+                  名前を保存
+                </Button>
+              </form>
+              {storageErrorNotice}
+            </Dialog>
+          ) : null}
+          {editing !== null ? (
+            <Dialog
+              title={editing === 'new' ? 'カラムを追加' : 'カラムを編集'}
+              onClose={() => setEditing(null)}
+            >
+              <ColumnEditor
+                key={`${deck.id}-${editing === 'new' ? 'new' : editing.id}`}
+                connections={profiles.data?.connections ?? []}
+                column={
+                  editing === 'new'
+                    ? undefined
+                    : deck.columns.find((column) => column.id === editing.id)
+                }
+                onSave={saveColumn}
+                onCancel={() => setEditing(null)}
+              />
+              {storageErrorNotice}
+            </Dialog>
+          ) : null}
+          {removed ? (
+            <div className="deck-undo" role="status">
+              <span>「{removed.column.title}」を削除しました。</span>
+              <Button
+                variant="outline"
+                type="button"
+                disabled={
+                  deck.columns.length >= MAX_COLUMNS || editing === 'new'
+                }
+                onClick={async () => {
+                  const columns = [...deck.columns]
+                  columns.splice(removed.index, 0, removed.column)
+                  if (await save({ ...deck, columns })) setRemoved(undefined)
+                }}
+              >
+                元に戻す
+              </Button>
+            </div>
+          ) : null}
+          {ready && deck.columns.length === 0 && editing === null ? (
+            <Empty>
+              <EmptyHeader>
+                <EmptyMedia variant="icon">
+                  <Icon name="columns" />
+                </EmptyMedia>
+                <EmptyTitle>
+                  <h2>調べたいことから、デッキを作りましょう</h2>
+                </EmptyTitle>
+                <EmptyDescription>
+                  チャットでAIに調べたいことを伝えると、調査に合ったカラムを作成します。
+                  検索・ユーザー投稿・リストのカラムを手動で追加することもできます。
+                </EmptyDescription>
+              </EmptyHeader>
+              <EmptyContent>
+                <Button type="button" onClick={() => setEditing('new')}>
+                  手動でカラムを追加
+                </Button>
+              </EmptyContent>
+            </Empty>
+          ) : null}
+          {ready && deck.columns.length > 0 ? (
+            <section
+              className="deck-board"
+              aria-label="調査カラム"
+              // biome-ignore lint/a11y/noNoninteractiveTabindex: Keyboard users must be able to scroll the column board.
+              tabIndex={0}
+            >
+              {deck.columns.map((column, index) => (
+                <ResearchColumn
+                  key={`${deck.id}:${column.id}`}
+                  registry={registry}
+                  column={column}
+                  citation={
+                    citationNavigation.target?.deckId === deck.id &&
+                    citationNavigation.target.column.id === column.id &&
+                    sameCitationSource(citationNavigation.target.column, column)
+                      ? citationNavigation.target
+                      : undefined
+                  }
+                  connectionLabel={
+                    profiles.data?.connections.find(
+                      (connection) => connection.id === column.connectionId,
+                    )?.displayName
+                  }
+                  first={index === 0}
+                  last={index === deck.columns.length - 1}
+                  onEdit={() => setEditing({ id: column.id })}
+                  onMove={(direction) =>
+                    save(moveColumn(deck, column.id, direction))
+                  }
+                  onRemove={async () => {
+                    const saved = await save({
+                      ...deck,
+                      columns: deck.columns.filter(
+                        (current) => current.id !== column.id,
+                      ),
+                    })
+                    if (saved) setRemoved({ column, index })
+                    if (
+                      typeof editing === 'object' &&
+                      editing?.id === column.id
+                    )
+                      setEditing(null)
+                  }}
+                />
+              ))}
+            </section>
+          ) : null}
+        </AppShell>
+      )}
+    </ResearchPanel>
   )
 }

src/features/decks/deck-switcher.tsx

@@ -1,6 +1,10 @@
-import { useEffect, useState } from 'react'
+import type { ReactNode } from 'react'
 import { Dialog } from '#/components/dialog'
 import { Icon } from '#/components/icon'
+import { Button } from '#/components/ui/button'
+import { Input } from '#/components/ui/input'
+import { Label } from '#/components/ui/label'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import type { DeckView } from './model'
 
 export function DeckSwitcher({
@@ -10,7 +14,11 @@ export function DeckSwitcher({
   onSelect,
   onCreate,
   onDelete,
-  onEditingChange,
+  dialog,
+  onDialogChange,
+  newTitle,
+  onNewTitleChange,
+  errorNotice,
 }: {
   decks: DeckView[]
   activeId: string
@@ -18,109 +26,118 @@ export function DeckSwitcher({
   onSelect: (id: string) => void
   onCreate: (title: string) => Promise<boolean>
   onDelete: () => Promise<boolean>
-  onEditingChange: (editing: boolean) => void
+  dialog: 'create' | 'delete' | null
+  onDialogChange: (dialog: 'create' | 'delete' | null) => void
+  newTitle: string
+  onNewTitleChange: (title: string) => void
+  errorNotice?: ReactNode
 }) {
-  const [creating, setCreating] = useState(false)
-  const [deleting, setDeleting] = useState(false)
-  useEffect(() => {
-    onEditingChange(creating || deleting)
-    return () => onEditingChange(false)
-  }, [creating, deleting, onEditingChange])
   return (
     <div className="deck-workspaces">
       <div className="deck-actions">
-        <label htmlFor="deck-selection">デッキプロファイル</label>
-        <select
+        <Label htmlFor="deck-selection">デッキプロファイル</Label>
+        <NativeSelect
+          className="w-full"
           id="deck-selection"
           value={activeId}
           disabled={!ready}
           onChange={(event) => {
             onSelect(event.target.value)
-            setCreating(false)
-            setDeleting(false)
+            onDialogChange(null)
           }}
         >
           {decks.map((deck) => (
-            <option key={deck.id} value={deck.id}>
+            <NativeSelectOption key={deck.id} value={deck.id}>
               {deck.title}
               {deck.persisted ? '' : '（一時）'}
-            </option>
+            </NativeSelectOption>
           ))}
-        </select>
-        <button
+        </NativeSelect>
+        <Button
+          variant="outline"
           className="workspace-create"
           aria-label="デッキを作成"
           title="デッキを作成"
           type="button"
           disabled={!ready}
           onClick={() => {
-            setCreating(!creating)
-            setDeleting(false)
+            onDialogChange('create')
           }}
         >
           <Icon name="plus" />
           <span>デッキを作成</span>
-        </button>
-        <button
+        </Button>
+        <Button
+          variant="ghost"
           className="workspace-delete"
           aria-label="デッキを削除"
           title="デッキを削除"
           type="button"
           disabled={!ready}
           onClick={() => {
-            setDeleting(!deleting)
-            setCreating(false)
+            onDialogChange('delete')
           }}
         >
           <Icon name="trash" />
           <span>デッキを削除</span>
-        </button>
+        </Button>
       </div>
-      {creating ? (
-        <Dialog title="デッキを作成" onClose={() => setCreating(false)}>
+      {dialog === 'create' ? (
+        <Dialog title="デッキを作成" onClose={() => onDialogChange(null)}>
           <form
             className="deck-rename"
             onSubmit={async (event) => {
               event.preventDefault()
-              const title = String(
-                new FormData(event.currentTarget).get('title') ?? '',
-              ).trim()
+              const title = newTitle.trim()
               if (!title) return
-              if (await onCreate(title)) setCreating(false)
+              if (await onCreate(title)) onDialogChange(null)
             }}
           >
-            <label htmlFor="new-deck-title">
+            <Label htmlFor="new-deck-title">
               新しいデッキ名
-              <input
+              <Input
                 id="new-deck-title"
                 name="title"
+                value={newTitle}
+                onChange={(event) => onNewTitleChange(event.target.value)}
                 maxLength={120}
                 required
               />
-            </label>
-            <button type="submit">作成</button>
-            <button type="button" onClick={() => setCreating(false)}>
+            </Label>
+            <Button type="submit">作成</Button>
+            <Button
+              variant="outline"
+              type="button"
+              onClick={() => onDialogChange(null)}
+            >
               キャンセル
-            </button>
+            </Button>
           </form>
+          {errorNotice}
         </Dialog>
       ) : null}
-      {deleting ? (
-        <Dialog title="デッキを削除" onClose={() => setDeleting(false)}>
+      {dialog === 'delete' ? (
+        <Dialog title="デッキを削除" onClose={() => onDialogChange(null)}>
           <div className="deck-undo">
             <p>このデッキとカラムの設定を削除します。</p>
-            <button
+            <Button
+              variant="destructive"
               type="button"
               onClick={async () => {
-                if (await onDelete()) setDeleting(false)
+                if (await onDelete()) onDialogChange(null)
               }}
             >
               削除する
-            </button>
-            <button type="button" onClick={() => setDeleting(false)}>
+            </Button>
+            <Button
+              variant="outline"
+              type="button"
+              onClick={() => onDialogChange(null)}
+            >
               キャンセル
-            </button>
+            </Button>
           </div>
+          {errorNotice}
         </Dialog>
       ) : null}
     </div>

src/features/decks/decks.css

@@ -1,47 +1,3 @@
-/* Hallmark · macrostructure: Workbench · tone: compact · anchor hue: Twitter blue */
-/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4 */
-.app-deck button {
-  display: inline-flex;
-  align-items: center;
-  justify-content: center;
-  gap: var(--space-xs);
-  min-height: 36px;
-  padding: var(--space-xs) var(--space-sm);
-  border: var(--rule-hairline) solid var(--control-border);
-  border-radius: var(--radius-sm);
-  color: var(--ink);
-  background: var(--surface);
-  cursor: pointer;
-  white-space: nowrap;
-}
-.app-deck button:hover:not(:disabled) {
-  background: var(--color-paper-3);
-}
-.app-deck button:active:not(:disabled) {
-  color: var(--accent);
-}
-.app-deck button:disabled {
-  opacity: 0.45;
-  cursor: default;
-}
-.app-deck .icon-button {
-  width: 36px;
-  height: 36px;
-  padding: var(--space-xs);
-  border-color: transparent;
-  background: transparent;
-}
-.app-deck .deck-primary {
-  color: var(--color-accent-ink);
-  background: var(--accent);
-  border-color: var(--accent);
-  font-weight: 650;
-}
-.app-deck .deck-primary:hover:not(:disabled),
-.app-deck .deck-primary:active:not(:disabled) {
-  background: var(--accent-hover);
-  color: var(--color-accent-ink);
-}
 .deck-heading {
   display: flex;
   align-items: center;
@@ -61,7 +17,7 @@
 }
 .deck-heading p {
   margin: var(--space-2xs) 0 0;
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
 .deck-actions {
@@ -73,7 +29,7 @@
 .deck-help,
 .deck-save-status,
 .deck-column-status {
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
   line-height: 1.5;
 }
@@ -130,7 +86,7 @@
   align-items: center;
   flex-wrap: wrap;
   gap: var(--space-xs);
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
 .deck-column-label span {
@@ -149,7 +105,7 @@
 .deck-query {
   margin: var(--space-2xs) 0;
   font-size: var(--text-xs);
-  color: var(--secondary);
+  color: var(--muted-foreground);
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -166,47 +122,9 @@
   scrollbar-width: thin;
   scrollbar-color: var(--control-border) var(--paper);
 }
-.column-menu {
-  position: relative;
-}
-.column-menu summary {
-  display: flex;
-  align-items: center;
-  justify-content: center;
-  width: 36px;
-  height: 36px;
-  border-radius: var(--radius-sm);
-  list-style: none;
-  cursor: pointer;
-}
-.column-menu summary::-webkit-details-marker {
-  display: none;
-}
-.column-menu summary:hover,
-.column-menu[open] summary {
-  background: var(--color-paper-3);
-}
-.column-menu-panel {
-  position: absolute;
-  top: 100%;
-  right: 0;
-  z-index: 5;
-  display: flex;
-  flex-direction: column;
-  align-items: stretch;
-  min-width: 158px;
-  padding: var(--space-2xs);
-  border: var(--rule-hairline) solid var(--control-border);
-  background: var(--surface);
-  box-shadow: 0 var(--space-xs) var(--space-lg) var(--color-shadow);
-}
-.column-menu-panel button {
-  justify-content: flex-start;
-  border: 0;
-}
 .deck-message {
   padding: var(--space-md);
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-sm);
   line-height: 1.6;
 }
@@ -223,11 +141,6 @@
 .research-post header > div {
   min-width: 0;
 }
-.research-post header img {
-  flex-shrink: 0;
-  border-radius: var(--radius-sm);
-  object-fit: cover;
-}
 .research-post strong {
   font-size: var(--text-sm);
 }
@@ -250,11 +163,11 @@
   justify-content: space-between;
   gap: var(--space-xs);
   margin-top: var(--space-sm);
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
 .research-post a {
-  color: var(--accent);
+  color: var(--primary);
   text-underline-offset: 0.2em;
 }
 .research-media {
@@ -265,34 +178,6 @@
   margin-block: var(--space-xs);
   border-radius: var(--radius-sm);
 }
-.deck-dialog {
-  width: min(480px, calc(100vw - 32px));
-  max-height: calc(100dvh - 32px);
-  padding: var(--space-lg);
-  overflow-y: auto;
-  border: var(--rule-hairline) solid var(--control-border);
-  border-radius: var(--radius-md);
-  background: var(--paper);
-  color: var(--ink);
-  box-shadow: 0 var(--space-md) var(--space-xl) var(--color-shadow);
-}
-.deck-dialog::backdrop {
-  background: var(--color-overlay);
-}
-.dialog-heading {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  gap: var(--space-xs);
-  margin-bottom: var(--space-md);
-}
-.dialog-heading h2,
-.deck-editor h2,
-.deck-empty h2 {
-  margin: 0;
-  font-size: var(--text-md);
-  overflow-wrap: anywhere;
-}
 .deck-editor {
   margin: 0;
   padding: 0;
@@ -312,30 +197,12 @@
   font-size: var(--text-sm);
   min-width: 0;
 }
-.deck-editor input:not([type="checkbox"]),
-.deck-editor select,
-.deck-rename input,
-.deck-workspaces select {
-  min-width: 0;
-  width: 100%;
-  min-height: 40px;
-  padding: var(--space-xs);
-  border: var(--rule-hairline) solid var(--control-border);
-  border-radius: var(--radius-sm);
-  background: var(--canvas);
-  color: var(--ink);
-}
 .deck-editor .deck-checkbox {
   display: flex;
   align-items: center;
   min-height: 40px;
   margin-bottom: var(--space-sm);
 }
-.deck-checkbox input {
-  accent-color: var(--accent);
-  width: 1.15rem;
-  height: 1.15rem;
-}
 .deck-rename {
   display: flex;
   flex-wrap: wrap;
@@ -347,7 +214,7 @@
   flex: 1 1 100%;
 }
 .deck-error {
-  color: var(--error);
+  color: var(--destructive);
   font-size: var(--text-sm);
   line-height: 1.6;
   overflow-wrap: anywhere;
@@ -374,7 +241,7 @@
   padding: var(--space-lg);
 }
 .deck-empty p {
-  color: var(--secondary);
+  color: var(--muted-foreground);
   line-height: 1.7;
   margin-bottom: var(--space-lg);
 }
@@ -386,10 +253,10 @@
 }
 .deck-workspaces > .deck-actions > label {
   width: 100%;
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
-.deck-workspaces > .deck-actions > select {
+.deck-workspaces > .deck-actions > [data-slot="native-select-wrapper"] {
   flex: 1 1 100%;
 }
 .deck-workspaces > .deck-actions > button {
@@ -404,35 +271,6 @@
   width: 100%;
 }
 @media (max-width: 767px) {
-  .deck-workspaces {
-    flex: 1;
-  }
-  .deck-workspaces > .deck-actions {
-    flex-wrap: nowrap;
-    gap: var(--space-2xs);
-  }
-  .deck-workspaces > .deck-actions > label {
-    position: absolute;
-    width: 1px;
-    height: 1px;
-    overflow: hidden;
-    clip-path: inset(50%);
-  }
-  .deck-workspaces > .deck-actions > select {
-    flex: 1;
-    width: 0;
-  }
-  .deck-workspaces > .deck-actions > button {
-    flex: none;
-  }
-  .app-deck .sidebar-add {
-    width: 36px;
-    flex-shrink: 0;
-    padding: var(--space-xs);
-  }
-  .sidebar-add span {
-    display: none;
-  }
   .deck-heading {
     min-height: 52px;
     padding-inline: var(--space-sm);
@@ -444,37 +282,19 @@
     grid-auto-columns: min(328px, 100%);
   }
 }
-@media (pointer: coarse) {
-  .app-deck .icon-button,
-  .column-menu summary {
-    min-width: 40px;
-    min-height: 40px;
-  }
-}
 .deck-count {
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
 .research-post header time {
   display: block;
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
 .deck-column-status {
   text-align: right;
 }
-@media (max-width: 767px) {
-  .workspace-create span,
-  .workspace-delete span {
-    display: none;
-  }
-  .app-deck .workspace-create,
-  .app-deck .workspace-delete {
-    width: 36px;
-    padding: var(--space-xs);
-  }
-}
-.research-post header > div {
+.research-post header > div:not([data-slot="avatar"]) {
   flex: 1;
 }
 .research-post header time {
@@ -490,6 +310,3 @@
   width: 14px;
   height: 14px;
 }
-.column-menu-panel .danger {
-  color: var(--error);
-}

src/features/decks/mastodon-source-editor.tsx

@@ -1,6 +1,10 @@
 import { useQuery } from '@tanstack/react-query'
 import { useServerFn } from '@tanstack/react-start'
 import { type ReactElement, useId } from 'react'
+import { Button } from '#/components/ui/button'
+import { Input } from '#/components/ui/input'
+import { Label } from '#/components/ui/label'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import { loadMastodonLists } from '../platforms/mastodon-server-functions'
 import type { MastodonSource } from '../platforms/mastodon-source'
 
@@ -32,9 +36,10 @@ export function MastodonSourceEditor({
   const id = useId()
   return (
     <>
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         カラムの種類
-        <select
+        <NativeSelect
+          className="w-full"
           id={id}
           value={source.kind}
           onChange={(event) =>
@@ -45,12 +50,12 @@ export function MastodonSourceEditor({
             )
           }
         >
-          <option value="search">検索</option>
-          <option value="user">ユーザー投稿</option>
-          <option value="list">リスト</option>
-          <option value="hashtag">ハッシュタグ</option>
-        </select>
-      </label>
+          <NativeSelectOption value="search">検索</NativeSelectOption>
+          <NativeSelectOption value="user">ユーザー投稿</NativeSelectOption>
+          <NativeSelectOption value="list">リスト</NativeSelectOption>
+          <NativeSelectOption value="hashtag">ハッシュタグ</NativeSelectOption>
+        </NativeSelect>
+      </Label>
       <MastodonSourceFields
         source={source}
         connectionId={connectionId}
@@ -90,9 +95,9 @@ function MastodonSearchEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         Mastodonの検索条件
-        <input
+        <Input
           id={id}
           value={source.query}
           onChange={(event) =>
@@ -102,7 +107,7 @@ function MastodonSearchEditor({
           placeholder="例：WebMCP"
           required
         />
-      </label>
+      </Label>
       <p className="deck-help">
         全文検索の対象はサーバーの設定によって異なります。結果が0件でも、検索に対応しているとは限りません。
       </p>
@@ -117,9 +122,9 @@ function MastodonUserEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         ユーザー
-        <input
+        <Input
           id={id}
           value={source.target}
           onChange={(event) =>
@@ -129,7 +134,7 @@ function MastodonUserEditor({
           maxLength={256}
           required
         />
-      </label>
+      </Label>
     </div>
   )
 }
@@ -141,9 +146,9 @@ function MastodonHashtagEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         ハッシュタグ
-        <input
+        <Input
           id={id}
           value={source.target}
           onChange={(event) =>
@@ -153,7 +158,7 @@ function MastodonHashtagEditor({
           maxLength={128}
           required
         />
-      </label>
+      </Label>
     </div>
   )
 }
@@ -168,9 +173,9 @@ function MastodonListEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         リスト
-        <input
+        <Input
           id={id}
           value={source.target}
           onChange={(event) =>
@@ -180,7 +185,7 @@ function MastodonListEditor({
           maxLength={32}
           required
         />
-      </label>
+      </Label>
       {connectionId && (
         <MastodonListChoices
           connectionId={connectionId}
@@ -209,9 +214,13 @@ function MastodonListChoices({
     return (
       <p role="alert">
         リストを取得できませんでした。
-        <button type="button" onClick={() => void lists.refetch()}>
+        <Button
+          variant="outline"
+          type="button"
+          onClick={() => void lists.refetch()}
+        >
           再試行
-        </button>
+        </Button>
       </p>
     )
   return (
@@ -220,9 +229,14 @@ function MastodonListChoices({
         <p>このアカウントのリストはありません。</p>
       ) : (
         lists.data.lists.map((list) => (
-          <button type="button" key={list.id} onClick={() => onSelect(list.id)}>
+          <Button
+            variant="outline"
+            type="button"
+            key={list.id}
+            onClick={() => onSelect(list.id)}
+          >
             {list.name}
-          </button>
+          </Button>
         ))
       )}
     </section>

src/features/decks/research-post-card.tsx

@@ -1,6 +1,9 @@
 import { useEffect, useRef, useState } from 'react'
 import { Icon } from '#/components/icon'
 import { PostText } from '#/components/post-text'
+import { Avatar, AvatarFallback, AvatarImage } from '#/components/ui/avatar'
+import { Badge } from '#/components/ui/badge'
+import { Button } from '#/components/ui/button'
 import type { ResearchPost } from '#/features/platforms/types'
 
 const dateFormatter = new Intl.DateTimeFormat('ja-JP', {
@@ -49,20 +52,17 @@ export function ResearchPostCard({
       className={`research-post${highlighted ? ' citation-highlight' : ''}`}
       data-post-url={post.url}
     >
-      {citationSnapshot ? <p className="handle">調査時に取得した投稿</p> : null}
+      {citationSnapshot ? (
+        <Badge variant="secondary">調査時に取得した投稿</Badge>
+      ) : null}
       {post.boostedBy ? (
         <p className="handle">{post.boostedBy.name} がブースト</p>
       ) : null}
       <header>
-        {post.author.avatarUrl ? (
-          <img
-            src={post.author.avatarUrl}
-            alt=""
-            width={36}
-            height={36}
-            loading="lazy"
-          />
-        ) : null}
+        <Avatar className="size-9 shrink-0">
+          <AvatarImage src={post.author.avatarUrl} alt="" loading="lazy" />
+          <AvatarFallback>{post.author.name.slice(0, 1)}</AvatarFallback>
+        </Avatar>
         <div>
           <strong>{post.author.name}</strong>
           <span className="handle">
@@ -78,13 +78,15 @@ export function ResearchPostCard({
       {concealed ? (
         <div>
           <p>{post.contentWarning || 'センシティブなメディアを含む投稿'}</p>
-          <button
+          <Button
+            variant="outline"
+            size="sm"
             type="button"
             aria-expanded={revealed}
             onClick={() => setRevealed(!revealed)}
           >
             {revealed ? '内容を隠す' : '内容を表示'}
-          </button>
+          </Button>
         </div>
       ) : null}
       {!concealed || revealed ? (

src/features/decks/twitter-source-editor.tsx

@@ -1,4 +1,9 @@
 import { type ReactElement, useId } from 'react'
+import { Button } from '#/components/ui/button'
+import { Checkbox } from '#/components/ui/checkbox'
+import { Input } from '#/components/ui/input'
+import { Label } from '#/components/ui/label'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import { useListChoices } from '../posts/use-list-choices'
 import type { DeckColumn } from './model'
 
@@ -33,20 +38,21 @@ export function TwitterSourceEditor({
   const id = useId()
   return (
     <>
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         カラムの種類
-        <select
+        <NativeSelect
+          className="w-full"
           id={id}
           value={source.kind}
           onChange={(event) =>
             onChange(defaultTwitterSource(event.target.value as Source['kind']))
           }
         >
-          <option value="search">検索</option>
-          <option value="user">ユーザー投稿</option>
-          <option value="list">リスト</option>
-        </select>
-      </label>
+          <NativeSelectOption value="search">検索</NativeSelectOption>
+          <NativeSelectOption value="user">ユーザー投稿</NativeSelectOption>
+          <NativeSelectOption value="list">リスト</NativeSelectOption>
+        </NativeSelect>
+      </Label>
       <TwitterSourceFields
         source={source}
         connectionId={connectionId}
@@ -84,9 +90,9 @@ function TwitterSearchEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={`${id}-query`}>
+      <Label htmlFor={`${id}-query`}>
         Twitterの検索条件
-        <input
+        <Input
           id={`${id}-query`}
           value={source.query}
           onChange={(event) =>
@@ -96,10 +102,11 @@ function TwitterSearchEditor({
           placeholder="例：WebMCP lang:ja"
           required
         />
-      </label>
-      <label htmlFor={`${id}-product`}>
+      </Label>
+      <Label htmlFor={`${id}-product`}>
         表示順
-        <select
+        <NativeSelect
+          className="w-full"
           id={`${id}-product`}
           value={source.product}
           onChange={(event) =>
@@ -109,23 +116,22 @@ function TwitterSearchEditor({
             })
           }
         >
-          <option value="Latest">最新</option>
-          <option value="Top">話題</option>
-        </select>
-      </label>
+          <NativeSelectOption value="Latest">最新</NativeSelectOption>
+          <NativeSelectOption value="Top">話題</NativeSelectOption>
+        </NativeSelect>
+      </Label>
       <p className="deck-help">
         from:、lang:、since: など、Twitterの検索構文を使えます。
       </p>
-      <label className="deck-checkbox">
-        <input
-          type="checkbox"
+      <Label className="deck-checkbox">
+        <Checkbox
           checked={source.following}
-          onChange={(event) =>
-            onChange({ ...source, following: event.target.checked })
+          onCheckedChange={(checked) =>
+            onChange({ ...source, following: checked })
           }
         />
         フォロー中のみ
-      </label>
+      </Label>
     </div>
   )
 }
@@ -137,9 +143,9 @@ function TwitterUserEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         ユーザー
-        <input
+        <Input
           id={id}
           value={source.target}
           onChange={(event) =>
@@ -149,7 +155,7 @@ function TwitterUserEditor({
           maxLength={256}
           required
         />
-      </label>
+      </Label>
     </div>
   )
 }
@@ -162,9 +168,9 @@ function TwitterListEditor({
   const id = useId()
   return (
     <div className="deck-source-fields">
-      <label htmlFor={id}>
+      <Label htmlFor={id}>
         リスト
-        <input
+        <Input
           id={id}
           value={source.target}
           onChange={(event) =>
@@ -174,7 +180,7 @@ function TwitterListEditor({
           maxLength={256}
           required
         />
-      </label>
+      </Label>
       {connectionId && (
         <TwitterListChoices
           connectionId={connectionId}
@@ -198,9 +204,13 @@ function TwitterListChoices({
     return (
       <p role="alert">
         リストを取得できませんでした。
-        <button type="button" onClick={() => void lists.refetch()}>
+        <Button
+          variant="outline"
+          type="button"
+          onClick={() => void lists.refetch()}
+        >
           再試行
-        </button>
+        </Button>
       </p>
     )
   return (
@@ -212,10 +222,15 @@ function TwitterListChoices({
         <p>リストはありません。URLまたはIDでも指定できます。</p>
       ) : (
         lists.data.map((list) => (
-          <button type="button" key={list.id} onClick={() => onSelect(list.id)}>
+          <Button
+            variant="outline"
+            type="button"
+            key={list.id}
+            onClick={() => onSelect(list.id)}
+          >
             {list.name}
             {list.isPrivate ? ' · 非公開' : ''}
-          </button>
+          </Button>
         ))
       )}
     </section>

src/features/research/citation-navigation.css

@@ -1,10 +1,10 @@
 .research-post.citation-highlight {
-  outline: 2px solid var(--accent, #67b7ff);
+  outline: 2px solid var(--primary);
   outline-offset: -2px;
-  background-color: color-mix(in srgb, var(--accent, #67b7ff) 14%, transparent);
+  background-color: color-mix(in srgb, var(--primary) 14%, transparent);
 }
 
 .research-post:focus-visible {
-  outline: 2px solid var(--accent, #67b7ff);
+  outline: 2px solid var(--primary);
   outline-offset: -2px;
 }

src/features/research/research-panel.css

@@ -1,16 +1,14 @@
-.app.app-deck {
-  grid-template-columns: 340px minmax(0, 1fr);
-}
 .research-panel {
   display: flex;
   flex-direction: column;
+  height: 100%;
   min-height: 0;
   min-width: 0;
-  border-right: 1px solid var(--border);
-  background: var(--paper);
+  background: var(--background);
   overflow: hidden;
 }
 .research-heading {
+  flex-shrink: 0;
   display: flex;
   align-items: center;
   justify-content: space-between;
@@ -23,13 +21,11 @@
   margin: 0;
   font-size: 1rem;
 }
-.research-heading button {
-  font-size: 0.75rem;
-}
 .research-context {
-  margin: 0.5rem 0 0;
-  color: var(--secondary);
+  margin: 0 0 0.75rem;
+  color: var(--muted-foreground);
   font-size: 0.75rem;
+  overflow-wrap: anywhere;
 }
 .research-history {
   display: flex;
@@ -38,20 +34,14 @@
   width: 100%;
   min-width: 0;
   font-size: 0.75rem;
-  color: var(--secondary);
+  color: var(--muted-foreground);
 }
 .research-history span {
   flex-shrink: 0;
 }
-.research-history select {
+.research-history > [data-slot="native-select-wrapper"] {
   flex: 1;
   min-width: 0;
-  font-size: 0.75rem;
-  color: var(--ink);
-  background: var(--canvas);
-  border: 1px solid var(--control-border);
-  border-radius: 0.25rem;
-  padding: 0.4rem;
 }
 .research-panel > p {
   padding: 0.5rem 1rem;
@@ -61,45 +51,32 @@
 .research-conversation {
   flex: 1;
   min-height: 80px;
-  overflow-y: auto;
-  overscroll-behavior: contain;
-  padding: 1rem;
 }
 .research-empty {
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: 0.85rem;
   line-height: 1.8;
 }
 .research-message {
-  margin-bottom: 1.25rem;
   font-size: 0.875rem;
   line-height: 1.65;
   overflow-wrap: anywhere;
 }
-.research-message strong {
-  font-size: 0.7rem;
-  color: var(--secondary);
-}
 .research-message p {
   margin: 0.35rem 0 0;
   white-space: pre-wrap;
 }
-.research-message-user {
-  border-left: 2px solid var(--accent);
-  padding-left: 0.75rem;
-}
-.research-message-tool {
-  color: var(--secondary);
+.research-tool-message {
+  color: var(--muted-foreground);
   font-size: 0.75rem;
+  white-space: pre-wrap;
+  overflow-wrap: anywhere;
 }
 .research-start-form {
+  flex-shrink: 0;
   padding: 0.75rem;
   border-top: 1px solid var(--border);
 }
-.research-context {
-  margin: 0 0 0.75rem;
-  overflow-wrap: anywhere;
-}
 .research-start-form > fieldset {
   border: 0;
   margin: 0;
@@ -111,21 +88,9 @@
 .research-start-form label {
   font-size: 0.8rem;
 }
-.research-start-form textarea {
-  width: 100%;
-  resize: vertical;
-  color: var(--ink);
-  background: var(--canvas);
-  border: 1px solid var(--control-border);
-  border-radius: 0.25rem;
-  padding: 0.6rem;
-}
 .research-account-picker {
   font-size: 0.75rem;
 }
-.research-account-picker summary {
-  cursor: pointer;
-}
 .research-accounts {
   display: grid;
   gap: 0.5rem;
@@ -141,10 +106,8 @@
   align-items: center;
   overflow-wrap: anywhere;
 }
-.research-accounts input {
-  width: auto;
-}
 .research-run {
+  flex-shrink: 0;
   border-top: 1px solid var(--border);
   padding: 0.5rem 0.75rem;
   font-size: 0.75rem;
@@ -159,73 +122,6 @@
   overflow-wrap: anywhere;
   font-size: 0.75rem;
 }
-.deck-toolbar {
-  display: flex;
-  flex-wrap: wrap;
-  align-items: center;
-  gap: 0.4rem;
-  padding: 0.5rem;
-  border-bottom: 1px solid var(--border);
-  flex-shrink: 0;
-}
-.deck-toolbar .deck-workspaces {
-  flex: 1;
-}
-.deck-toolbar .deck-workspaces > .deck-actions {
-  flex-wrap: nowrap;
-}
-.deck-toolbar .deck-workspaces > .deck-actions > label {
-  position: absolute;
-  width: 1px;
-  height: 1px;
-  overflow: hidden;
-  clip-path: inset(50%);
-}
-.deck-toolbar .deck-workspaces > .deck-actions > select {
-  flex: 1;
-  width: 0;
-}
-.deck-toolbar .deck-workspaces > .deck-actions > button {
-  flex: none;
-  width: 36px;
-  padding: 0.25rem;
-}
-.deck-toolbar .workspace-create span,
-.deck-toolbar .workspace-delete span,
-.deck-toolbar .sidebar-add span,
-.deck-toolbar .sidebar-note {
-  display: none;
-}
-.app-deck .deck-toolbar .sidebar-add {
-  width: 36px;
-}
-@media (max-width: 767px) {
-  .app.app-deck {
-    grid-template-columns: minmax(0, 1fr);
-    grid-template-rows: 44dvh minmax(0, 1fr);
-  }
-  .research-panel {
-    border-right: 0;
-    border-bottom: 1px solid var(--border);
-    overflow-y: auto;
-  }
-  .research-heading {
-    padding: 0.5rem 0.75rem;
-  }
-  .research-conversation {
-    flex: 1 0 80px;
-    min-height: 80px;
-  }
-  .research-start-form {
-    padding: 0.5rem 0.75rem;
-  }
-  .research-run {
-    flex-shrink: 0;
-  }
-  .deck-toolbar > button:last-child {
-    width: 100%;
-  }
-}
 .research-markdown {
   min-width: 0;
   overflow-wrap: anywhere;
@@ -238,26 +134,33 @@
 .research-markdown h5,
 .research-markdown h6 {
   font-size: 1em;
+  font-weight: 600;
   margin: 1em 0 0.4em;
 }
 .research-markdown ul,
 .research-markdown ol {
   padding-left: 1.4rem;
 }
+.research-markdown ul {
+  list-style: disc;
+}
+.research-markdown ol {
+  list-style: decimal;
+}
 .research-markdown li + li {
   margin-top: 0.25rem;
 }
 .research-markdown blockquote {
   margin: 0.75rem 0;
   padding-left: 0.75rem;
-  border-left: 2px solid var(--control-border);
-  color: var(--secondary);
+  border-left: 2px solid var(--border);
+  color: var(--muted-foreground);
 }
 .research-markdown pre {
   max-width: 100%;
   overflow-x: auto;
   padding: 0.75rem;
-  background: var(--canvas);
+  background: var(--muted);
   white-space: pre;
   font-size: 0.75rem;
 }
@@ -281,7 +184,7 @@
   text-align: left;
 }
 .research-markdown a {
-  color: var(--accent);
+  color: var(--primary);
   text-decoration: underline;
   text-underline-offset: 0.15em;
 }

src/features/research/research-panel.test.tsx

@@ -83,6 +83,7 @@ function show(connections = [connection], ready = true) {
   const ui = (
     ready = true,
     contextDeck = { id: 'manual', title: '手動デッキ', columns: [] },
+    presentation = 'desktop',
   ) => (
     <QueryClientProvider client={client}>
       <ResearchPanel
@@ -91,16 +92,23 @@ function show(connections = [connection], ready = true) {
         connections={connections}
         onOpenDeck={onOpenDeck}
         onNavigateCitation={onNavigateCitation}
-      />
+      >
+        {(renderPanel) => <div key={presentation}>{renderPanel()}</div>}
+      </ResearchPanel>
     </QueryClientProvider>
   )
   return { ...render(ui(ready)), client, ui, onOpenDeck, onNavigateCitation }
 }
 
-it('retains input and uses the same request ID when retrying a failed start', async () => {
+it('retains input, selected accounts, and the request ID across responsive view remounts after a failed start', async () => {
   actions.start.mockRejectedValue(new Error('internal credential detail'))
-  show()
+  const view = show([
+    connection,
+    { ...connection, id: 'second', displayName: 'second' },
+  ])
   await waitFor(() => expect(screen.getByLabelText('メッセージ')).toBeEnabled())
+  fireEvent.click(screen.getByRole('button', { name: '接続アカウント · 2件' }))
+  fireEvent.click(screen.getByRole('checkbox', { name: 'second · Twitter' }))
   fireEvent.change(screen.getByLabelText('メッセージ'), {
     target: { value: 'WebMCPの反応' },
   })
@@ -110,6 +118,15 @@ it('retains input and uses the same request ID when retrying a failed start', as
   )
   expect(screen.getByLabelText('メッセージ')).toHaveValue('WebMCPの反応')
   expect(screen.queryByText(/internal credential/)).toBeNull()
+  view.rerender(view.ui(true, undefined, 'mobile'))
+  expect(screen.getByRole('alert')).toHaveTextContent('入力内容は残っています')
+  expect(screen.getByLabelText('メッセージ')).toHaveValue('WebMCPの反応')
+  fireEvent.click(screen.getByRole('button', { name: '接続アカウント · 1件' }))
+  expect(
+    screen.getByRole('checkbox', { name: 'second · Twitter' }),
+  ).not.toBeChecked()
+  expect(MockEventSource.instances).toHaveLength(1)
+  expect(MockEventSource.instances[0]?.close).not.toHaveBeenCalled()
   fireEvent.click(screen.getByRole('button', { name: '送信' }))
   await waitFor(() => expect(actions.start).toHaveBeenCalledTimes(2))
   expect(actions.start.mock.calls[1]?.[0]).toEqual(
@@ -197,9 +214,13 @@ it('limits account selection to six and shows the host report path on completion
   )
   await screen.findByText('/home/owner/reports/webmcp.md')
   fireEvent.click(screen.getByText('接続アカウント · 6件'))
-  expect(screen.getByLabelText('account6 · Twitter')).toBeDisabled()
-  fireEvent.click(screen.getByLabelText('account0 · Twitter'))
-  expect(screen.getByLabelText('account6 · Twitter')).toBeEnabled()
+  expect(
+    screen.getByRole('checkbox', { name: 'account6 · Twitter' }),
+  ).toHaveAttribute('aria-disabled', 'true')
+  fireEvent.click(screen.getByRole('checkbox', { name: 'account0 · Twitter' }))
+  expect(
+    screen.getByRole('checkbox', { name: 'account6 · Twitter' }),
+  ).not.toHaveAttribute('aria-disabled', 'true')
 })
 
 it('waits for the workspace before restoring a completed plan from the stream', async () => {
@@ -369,6 +390,8 @@ it('shows streamed conversation and sends follow-up input with the current deck
 
 it('selects newly loaded connected accounts until the user changes their selection', async () => {
   const view = show([])
+  await waitFor(() => expect(screen.getByLabelText('メッセージ')).toBeEnabled())
+  fireEvent.click(screen.getByRole('button', { name: '接続アカウント · 0件' }))
   await screen.findByText('接続アカウントを先に追加してください。')
   view.rerender(
     <QueryClientProvider client={view.client}>
@@ -595,9 +618,15 @@ it('opens a saved chat with its context deck and selected accounts, preserving l
   expect(screen.getByLabelText('メッセージ')).toHaveValue('')
   expect(screen.getByText('中断しました・続きから再開できます')).toBeVisible()
   fireEvent.click(screen.getByText('接続アカウント · 1件'))
-  expect(screen.getByLabelText('調査用アカウント · Twitter')).not.toBeChecked()
-  expect(screen.getByLabelText('account2 · Twitter')).toBeChecked()
-  fireEvent.click(screen.getByLabelText('調査用アカウント · Twitter'))
+  expect(
+    screen.getByRole('checkbox', { name: '調査用アカウント · Twitter' }),
+  ).not.toBeChecked()
+  expect(
+    screen.getByRole('checkbox', { name: 'account2 · Twitter' }),
+  ).toBeChecked()
+  fireEvent.click(
+    screen.getByRole('checkbox', { name: '調査用アカウント · Twitter' }),
+  )
   act(() =>
     MockEventSource.instances[0]?.onmessage?.({
       data: JSON.stringify({
@@ -612,7 +641,9 @@ it('opens a saved chat with its context deck and selected accounts, preserving l
       run: { message: '更新' },
     }),
   )
-  expect(screen.getByLabelText('調査用アカウント · Twitter')).toBeChecked()
+  expect(
+    screen.getByRole('checkbox', { name: '調査用アカウント · Twitter' }),
+  ).toBeChecked()
   expect(view.onOpenDeck).toHaveBeenCalledOnce()
   fireEvent.change(screen.getByLabelText('メッセージ'), {
     target: { value: '続きを調べて' },

src/features/research/research-panel.tsx

@@ -1,6 +1,38 @@
 import { useQuery, useQueryClient } from '@tanstack/react-query'
 import { useServerFn } from '@tanstack/react-start'
-import { useCallback, useEffect, useId, useRef, useState } from 'react'
+import {
+  type ReactNode,
+  useCallback,
+  useEffect,
+  useId,
+  useRef,
+  useState,
+} from 'react'
+import { Bubble, BubbleContent } from '#/components/ui/bubble'
+import { Button } from '#/components/ui/button'
+import { Checkbox } from '#/components/ui/checkbox'
+import {
+  Collapsible,
+  CollapsibleContent,
+  CollapsibleTrigger,
+} from '#/components/ui/collapsible'
+import {
+  InputGroup,
+  InputGroupAddon,
+  InputGroupButton,
+  InputGroupTextarea,
+} from '#/components/ui/input-group'
+import { Marker, MarkerContent } from '#/components/ui/marker'
+import { Message, MessageContent, MessageHeader } from '#/components/ui/message'
+import {
+  MessageScroller,
+  MessageScrollerButton,
+  MessageScrollerContent,
+  MessageScrollerItem,
+  MessageScrollerProvider,
+  MessageScrollerViewport,
+} from '#/components/ui/message-scroller'
+import { NativeSelect, NativeSelectOption } from '#/components/ui/native-select'
 import type { Connection } from '../connections/model'
 import type { Deck } from '../decks/model'
 import {
@@ -28,6 +60,12 @@ const statusNames: Record<ResearchRun['status'], string> = {
   interrupted: '中断しました・続きから再開できます',
 }
 type ResearchInput = { topic: string; connectionIds: string[] }
+type ResearchDraft = {
+  runId: string | null
+  topic: string
+  selected: string[] | null
+}
+type RenderResearchPanel = (onCitationNavigated?: () => void) => ReactNode
 
 export function ResearchPanel({
   ready,
@@ -35,12 +73,14 @@ export function ResearchPanel({
   connections,
   onOpenDeck,
   onNavigateCitation,
+  children,
 }: {
   ready: boolean
   contextDeck: Deck
   connections: Connection[]
   onOpenDeck: (deck: Deck, activate?: boolean) => unknown
   onNavigateCitation?: (url: string, citations: ResearchCitation[]) => boolean
+  children?: (renderPanel: RenderResearchPanel) => ReactNode
 }) {
   const fetchStatus = useServerFn(loadResearchStatus)
   const start = useServerFn(startResearch)
@@ -48,16 +88,33 @@ export function ResearchPanel({
   const reset = useServerFn(resetResearch)
   const select = useServerFn(selectResearch)
   const client = useQueryClient()
+  const historyId = useId()
   const status = useQuery({
     queryKey: ['research-status'],
     queryFn: () => fetchStatus(),
     retry: false,
   })
   const run = status.data?.run ?? null
+  const runId = run?.id ?? null
+  const [draft, setDraft] = useState<ResearchDraft>({
+    runId,
+    topic: '',
+    selected: run?.connectionIds ?? null,
+  })
+  // Conversation changes reset the draft; responsive view remounts do not.
+  if (draft.runId !== runId) {
+    setDraft({ runId, topic: '', selected: run?.connectionIds ?? null })
+  }
+  function updateDraft(
+    update: Partial<Pick<ResearchDraft, 'topic' | 'selected'>>,
+  ) {
+    setDraft((current) =>
+      current.runId === runId ? { ...current, ...update } : current,
+    )
+  }
   const [busy, setBusy] = useState(false)
   const [error, setError] = useState<string>()
   const [reconnecting, setReconnecting] = useState(false)
-  const [draftResetVersion, setDraftResetVersion] = useState(0)
   const previousRunId = useRef<string | null>(null)
   const syncedRunId = useRef<string | null>(null)
   const attemptedVersion = useRef<string | null>(null)
@@ -79,7 +136,6 @@ export function ResearchPanel({
 
   useEffect(() => {
     if (previousRunId.current && previousRunId.current !== run?.id) {
-      setDraftResetVersion((value) => value + 1)
       request.current = null
       pendingTurn.current = null
     }
@@ -209,7 +265,7 @@ export function ResearchPanel({
       )
       request.current = null
       pendingTurn.current = null
-      setDraftResetVersion((value) => value + 1)
+      updateDraft({ topic: '' })
     } catch {
       setError(
         '新しいチャットを開始できませんでした。会話と入力内容は残っています。もう一度お試しください。',
@@ -252,11 +308,13 @@ export function ResearchPanel({
     }
   }
 
-  return (
+  const renderPanel: RenderResearchPanel = (onCitationNavigated) => (
     <aside className="research-panel" aria-label="調査チャット">
       <header className="research-heading">
         <h2>調査チャット</h2>
-        <button
+        <Button
+          variant="ghost"
+          size="sm"
           type="button"
           disabled={busy || !run || isResearchActive(run)}
           title={
@@ -267,24 +325,26 @@ export function ResearchPanel({
           onClick={() => void newChat()}
         >
           新しいチャット
-        </button>
+        </Button>
         {(status.data?.history?.length ?? 0) > 0 && (
-          <label className="research-history">
+          <label className="research-history" htmlFor={historyId}>
             <span>チャット履歴</span>
-            <select
+            <NativeSelect
+              id={historyId}
+              size="sm"
               value={run?.id ?? ''}
               disabled={busy || isResearchActive(run)}
               onChange={(event) => void selectChat(event.target.value)}
             >
-              <option value="" disabled>
+              <NativeSelectOption value="" disabled>
                 新しいチャット
-              </option>
+              </NativeSelectOption>
               {status.data?.history?.map((entry) => (
-                <option key={entry.id} value={entry.id}>
+                <NativeSelectOption key={entry.id} value={entry.id}>
                   {entry.title}
-                </option>
+                </NativeSelectOption>
               ))}
-            </select>
+            </NativeSelect>
           </label>
         )}
       </header>
@@ -296,9 +356,9 @@ export function ResearchPanel({
       {status.isError && (
         <p className="deck-error" role="alert">
           調査状況を取得できませんでした。
-          <button type="button" onClick={() => void status.refetch()}>
+          <Button type="button" onClick={() => void status.refetch()}>
             再試行
-          </button>
+          </Button>
         </p>
       )}
       {error && (
@@ -315,7 +375,11 @@ export function ResearchPanel({
         key={`conversation:${run?.id ?? 'new'}`}
         messages={run?.messages ?? []}
         citations={run?.citations ?? []}
-        onNavigateCitation={onNavigateCitation}
+        onNavigateCitation={(url, citations) => {
+          const navigated = onNavigateCitation?.(url, citations) ?? false
+          if (navigated) onCitationNavigated?.()
+          return navigated
+        }}
       />
       {run && (
         <ResearchRunStatus
@@ -327,8 +391,10 @@ export function ResearchPanel({
       )}
       <ResearchComposer
         key={run?.id ?? 'new'}
-        initialConnectionIds={run?.connectionIds}
-        resetVersion={draftResetVersion}
+        topic={draft.topic}
+        selected={draft.selected}
+        onTopicChange={(topic) => updateDraft({ topic })}
+        onSelectionChange={(selected) => updateDraft({ selected })}
         connections={connections}
         contextTitle={contextDeck.title}
         disabled={
@@ -338,6 +404,7 @@ export function ResearchPanel({
       />
     </aside>
   )
+  return children ? children(renderPanel) : renderPanel()
 }
 
 function ResearchConversation({
@@ -349,66 +416,81 @@ function ResearchConversation({
   citations: ResearchCitation[]
   onNavigateCitation?: (url: string, citations: ResearchCitation[]) => boolean
 }) {
-  const container = useRef<HTMLDivElement>(null)
-  const follow = useRef(true)
-  useEffect(() => {
-    const element = container.current
-    if (element && follow.current && messages.length > 0)
-      element.scrollTop = element.scrollHeight
-  }, [messages])
   const names = { user: 'あなた', assistant: 'Codex', tool: 'ツール実行' }
   return (
-    <div
-      className="research-conversation"
-      role="log"
-      aria-label="調査の会話"
-      aria-live="polite"
-      ref={container}
-      onScroll={() => {
-        const element = container.current
-        if (element)
-          follow.current =
-            element.scrollHeight - element.scrollTop - element.clientHeight < 60
-      }}
-    >
-      {messages.length === 0 ? (
-        <p className="research-empty">
-          気になる話題や調べたいことを送ってください。検索を進めながらカラムを追加し、レポートを自宅サーバーに保存します。
-        </p>
-      ) : (
-        messages.map((message) => (
-          <article
-            className={`research-message research-message-${message.role}`}
-            key={message.id}
-          >
-            <strong>{names[message.role]}</strong>
-            {message.role === 'assistant' ? (
-              <ResearchMarkdown
-                text={message.text}
-                onNavigateCitation={(url) =>
-                  onNavigateCitation?.(url, citations) ?? false
-                }
-              />
+    <MessageScrollerProvider autoScroll>
+      <MessageScroller className="research-conversation">
+        <MessageScrollerViewport aria-label="調査メッセージ">
+          <MessageScrollerContent aria-label="調査の会話" className="gap-5 p-4">
+            {messages.length === 0 ? (
+              <MessageScrollerItem messageId="empty">
+                <p className="research-empty">
+                  気になる話題や調べたいことを送ってください。検索を進めながらカラムを追加し、レポートを自宅サーバーに保存します。
+                </p>
+              </MessageScrollerItem>
             ) : (
-              <p>{message.text}</p>
+              messages.map((message) => (
+                <MessageScrollerItem
+                  key={message.id}
+                  messageId={message.id}
+                  scrollAnchor={message.role === 'user'}
+                >
+                  {message.role === 'tool' ? (
+                    <Marker className="research-tool-message">
+                      <MarkerContent>
+                        <span className="sr-only">{names.tool}: </span>
+                        {message.text}
+                      </MarkerContent>
+                    </Marker>
+                  ) : (
+                    <Message
+                      align={message.role === 'user' ? 'end' : 'start'}
+                      className="research-message"
+                    >
+                      <MessageContent>
+                        <MessageHeader>{names[message.role]}</MessageHeader>
+                        {message.role === 'assistant' ? (
+                          <ResearchMarkdown
+                            text={message.text}
+                            onNavigateCitation={(url) =>
+                              onNavigateCitation?.(url, citations) ?? false
+                            }
+                          />
+                        ) : (
+                          <Bubble align="end">
+                            <BubbleContent>
+                              <p>{message.text}</p>
+                            </BubbleContent>
+                          </Bubble>
+                        )}
+                      </MessageContent>
+                    </Message>
+                  )}
+                </MessageScrollerItem>
+              ))
             )}
-          </article>
-        ))
-      )}
-    </div>
+          </MessageScrollerContent>
+        </MessageScrollerViewport>
+        <MessageScrollerButton aria-label="最新のメッセージへ" />
+      </MessageScroller>
+    </MessageScrollerProvider>
   )
 }
 
 function ResearchComposer({
-  initialConnectionIds,
-  resetVersion,
+  topic,
+  selected,
+  onTopicChange,
+  onSelectionChange,
   connections,
   contextTitle,
   disabled,
   onSend,
 }: {
-  initialConnectionIds?: string[]
-  resetVersion: number
+  topic: string
+  selected: string[] | null
+  onTopicChange: (topic: string) => void
+  onSelectionChange: (selected: string[]) => void
   connections: Connection[]
   contextTitle: string
   disabled: boolean
@@ -417,13 +499,6 @@ function ResearchComposer({
   const available = connections.filter(
     (connection) => connection.status === 'connected',
   )
-  const [topic, setTopic] = useState('')
-  useEffect(() => {
-    if (resetVersion > 0) setTopic('')
-  }, [resetVersion])
-  const [selected, setSelected] = useState<string[] | null>(
-    initialConnectionIds ?? null,
-  )
   const selectedIds =
     selected ?? available.slice(0, 6).map((connection) => connection.id)
   const id = useId()
@@ -441,7 +516,7 @@ function ResearchComposer({
           topic: topic.trim(),
           connectionIds: validSelection,
         }).then((sent) => {
-          if (sent) setTopic('')
+          if (sent) onTopicChange('')
         })
       }}
     >
@@ -449,56 +524,69 @@ function ResearchComposer({
         送信するデッキ: <strong>{contextTitle}</strong>
       </p>
       <fieldset disabled={disabled}>
-        <details className="research-account-picker">
-          <summary>接続アカウント · {validSelection.length}件</summary>
-          <fieldset className="research-accounts">
-            <legend>調査に使う接続アカウント（最大6件）</legend>
-            {available.length === 0 ? (
-              <p>接続アカウントを先に追加してください。</p>
-            ) : (
-              available.map((connection) => (
-                <label key={connection.id}>
-                  <input
-                    type="checkbox"
-                    checked={selectedIds.includes(connection.id)}
-                    disabled={
-                      !selectedIds.includes(connection.id) &&
-                      validSelection.length >= 6
-                    }
-                    onChange={(event) =>
-                      setSelected(
-                        event.target.checked
-                          ? [...selectedIds, connection.id]
-                          : selectedIds.filter(
-                              (value) => value !== connection.id,
-                            ),
-                      )
-                    }
-                  />
-                  {connection.displayName} ·{' '}
-                  {connection.platform === 'twitter' ? 'Twitter' : 'Mastodon'}
-                </label>
-              ))
-            )}
-          </fieldset>
-        </details>
+        <Collapsible className="research-account-picker" disabled={disabled}>
+          <CollapsibleTrigger render={<Button variant="ghost" size="sm" />}>
+            接続アカウント · {validSelection.length}件
+          </CollapsibleTrigger>
+          <CollapsibleContent>
+            <fieldset className="research-accounts">
+              <legend>調査に使う接続アカウント（最大6件）</legend>
+              {available.length === 0 ? (
+                <p>接続アカウントを先に追加してください。</p>
+              ) : (
+                available.map((connection) => (
+                  <label key={connection.id} htmlFor={`${id}-${connection.id}`}>
+                    <Checkbox
+                      id={`${id}-${connection.id}`}
+                      checked={selectedIds.includes(connection.id)}
+                      disabled={
+                        disabled ||
+                        (!selectedIds.includes(connection.id) &&
+                          validSelection.length >= 6)
+                      }
+                      onCheckedChange={(checked) =>
+                        onSelectionChange(
+                          checked
+                            ? [...selectedIds, connection.id]
+                            : selectedIds.filter(
+                                (value) => value !== connection.id,
+                              ),
+                        )
+                      }
+                    />
+                    {connection.displayName} ·{' '}
+                    {connection.platform === 'twitter' ? 'Twitter' : 'Mastodon'}
+                  </label>
+                ))
+              )}
+            </fieldset>
+          </CollapsibleContent>
+        </Collapsible>
         <label htmlFor={id}>メッセージ</label>
-        <textarea
-          id={id}
-          value={topic}
-          onChange={(event) => setTopic(event.target.value)}
-          maxLength={1000}
-          rows={3}
-          placeholder="例：WebMCPの反応を比較して。その後、このデッキを絞り込んで。"
-          required
-        />
-        <button
-          type="submit"
-          className="deck-primary"
-          disabled={disabled || !topic.trim() || validSelection.length === 0}
-        >
-          送信
-        </button>
+        <InputGroup>
+          <InputGroupTextarea
+            id={id}
+            value={topic}
+            onChange={(event) => onTopicChange(event.target.value)}
+            maxLength={1000}
+            rows={3}
+            placeholder="例：WebMCPの反応を比較して。その後、このデッキを絞り込んで。"
+            required
+            disabled={disabled}
+          />
+          <InputGroupAddon align="block-end" className="justify-end">
+            <InputGroupButton
+              type="submit"
+              variant="default"
+              size="sm"
+              disabled={
+                disabled || !topic.trim() || validSelection.length === 0
+              }
+            >
+              送信
+            </InputGroupButton>
+          </InputGroupAddon>
+        </InputGroup>
       </fieldset>
     </form>
   )
@@ -518,7 +606,9 @@ function ResearchRunStatus({
   const deck = run.deck ?? run.contextDeck
   return (
     <section className="research-run" aria-label="調査状況">
-      <p role="status">{statusNames[run.status]}</p>
+      <Marker role="status">
+        <MarkerContent>{statusNames[run.status]}</MarkerContent>
+      </Marker>
       {run.error && (
         <p className="deck-error" role="alert">
           {run.error}
@@ -533,19 +623,27 @@ function ResearchRunStatus({
       )}
       <div className="deck-actions">
         {isResearchActive(run) && (
-          <button type="button" disabled={busy} onClick={onCancel}>
+          <Button
+            variant="outline"
+            size="sm"
+            type="button"
+            disabled={busy}
+            onClick={onCancel}
+          >
             調査を中止
-          </button>
+          </Button>
         )}
         {deck && (
-          <button
+          <Button
+            variant="outline"
+            size="sm"
             type="button"
             onClick={() => {
               onOpenDeck(deck)
             }}
           >
             一時デッキで開く
-          </button>
+          </Button>
         )}
       </div>
     </section>

src/hooks/use-mobile.ts

@@ -0,0 +1,19 @@
+import * as React from 'react'
+
+const MOBILE_BREAKPOINT = 768
+
+export function useIsMobile() {
+  const [isMobile, setIsMobile] = React.useState<boolean | undefined>(undefined)
+
+  React.useEffect(() => {
+    const mql = window.matchMedia(`(max-width: ${MOBILE_BREAKPOINT - 1}px)`)
+    const onChange = () => {
+      setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    }
+    mql.addEventListener('change', onChange)
+    setIsMobile(window.innerWidth < MOBILE_BREAKPOINT)
+    return () => mql.removeEventListener('change', onChange)
+  }, [])
+
+  return !!isMobile
+}

src/routes/__root.tsx

@@ -38,7 +38,7 @@ function RootContent() {
 
 function RootDocument({ children }: { children: React.ReactNode }) {
   return (
-    <html lang="ja">
+    <html lang="ja" className="dark">
       <head>
         <HeadContent />
       </head>

src/styles.css

@@ -1,4 +1,5 @@
-/* Hallmark · macrostructure: Workbench · tone: compact · anchor hue: Twitter blue */
+/* Hallmark · macrostructure: Workbench · tone: compact · anchor hue: neutral */
+@import "./ui.css";
 @import "../tokens.css";
 
 :root {
@@ -6,10 +7,7 @@
   --surface: var(--color-paper-2);
   --paper: var(--color-paper);
   --ink: var(--color-ink);
-  --secondary: var(--color-muted);
-  --accent: var(--color-accent);
   --accent-hover: var(--color-accent-hover);
-  --border: var(--color-rule);
   --control-border: var(--color-control-rule);
   --error: var(--color-error);
   color: var(--ink);
@@ -37,7 +35,7 @@ select {
   font: inherit;
 }
 a {
-  color: var(--accent);
+  color: var(--primary);
   text-underline-offset: 0.18em;
 }
 a:active {
@@ -47,47 +45,6 @@ a:active {
   outline: var(--rule-active) solid var(--color-focus);
   outline-offset: 2px;
 }
-.app {
-  width: 100%;
-  height: 100dvh;
-  min-height: 0;
-  background: var(--canvas);
-}
-.app-deck {
-  display: grid;
-  grid-template-columns: 188px minmax(0, 1fr);
-}
-.app-sidebar {
-  min-width: 0;
-  display: flex;
-  flex-direction: column;
-  gap: var(--space-lg);
-  padding: var(--space-md) var(--space-sm);
-  border-right: var(--rule-hairline) solid var(--border);
-  overflow-y: auto;
-}
-svg {
-  flex-shrink: 0;
-}
-.sidebar-note {
-  margin-top: auto;
-  margin-bottom: 0;
-  color: var(--secondary);
-  font-size: var(--text-xs);
-  line-height: 1.6;
-}
-.reader {
-  min-width: 0;
-  min-height: 0;
-  display: flex;
-  flex-direction: column;
-  margin: var(--space-sm);
-  padding: var(--space-xs);
-  border: var(--rule-hairline) solid var(--border);
-  border-radius: 16px;
-  background: var(--paper);
-  overflow: hidden;
-}
 h1 {
   margin: 0;
   min-width: 0;
@@ -99,24 +56,24 @@ h1 {
 }
 .handle {
   display: block;
-  color: var(--secondary);
+  color: var(--muted-foreground);
   font-size: var(--text-xs);
 }
-@media (max-width: 767px) {
-  .app-deck {
-    grid-template-columns: minmax(0, 1fr);
-    grid-template-rows: auto minmax(0, 1fr);
-  }
-  .app-sidebar {
-    flex-direction: row;
-    align-items: center;
-    gap: var(--space-xs);
-    padding: var(--space-xs);
-    overflow: visible;
-    border-right: 0;
-    border-bottom: var(--rule-hairline) solid var(--border);
-  }
-  .sidebar-note {
-    display: none;
+
+.workspace .reader {
+  overflow: hidden;
+}
+.sidebar-note {
+  color: var(--muted-foreground);
+  font-size: var(--text-xs);
+}
+@media (prefers-reduced-motion: reduce) {
+  *,
+  *::before,
+  *::after {
+    /* biome-ignore lint/complexity/noImportantStyles: Respect reduced motion over registry component animation utilities. */
+    animation-duration: 0.01ms !important;
+    /* biome-ignore lint/complexity/noImportantStyles: Respect reduced motion over registry component transition utilities. */
+    transition-duration: 0.01ms !important;
   }
 }

src/ui.css

@@ -0,0 +1,82 @@
+/* Hallmark · macrostructure: sidebar-09 Workbench · tone: compact · anchor hue: neutral */
+/* Hallmark · pre-emit critique: P5 H4 E4 S5 R5 V4 · mobile: pass 320/375/414/768 */
+@import "tailwindcss";
+@import "tw-animate-css";
+@import "shadcn/tailwind.css";
+
+@custom-variant dark (&:is(.dark *));
+
+:root {
+  --radius: 0.625rem;
+  --background: oklch(0.145 0 0);
+  --foreground: oklch(0.985 0 0);
+  --card: oklch(0.205 0 0);
+  --card-foreground: oklch(0.985 0 0);
+  --popover: oklch(0.205 0 0);
+  --popover-foreground: oklch(0.985 0 0);
+  --primary: oklch(0.922 0 0);
+  --primary-foreground: oklch(0.205 0 0);
+  --secondary: oklch(0.269 0 0);
+  --secondary-foreground: oklch(0.985 0 0);
+  --muted: oklch(0.269 0 0);
+  --muted-foreground: oklch(0.708 0 0);
+  --accent: oklch(0.269 0 0);
+  --accent-foreground: oklch(0.985 0 0);
+  --destructive: oklch(0.704 0.191 22.216);
+  --border: oklch(1 0 0 / 10%);
+  --input: oklch(1 0 0 / 15%);
+  --ring: oklch(0.556 0 0);
+  --sidebar: oklch(0.205 0 0);
+  --sidebar-foreground: oklch(0.985 0 0);
+  --sidebar-primary: oklch(0.922 0 0);
+  --sidebar-primary-foreground: oklch(0.205 0 0);
+  --sidebar-accent: oklch(0.269 0 0);
+  --sidebar-accent-foreground: oklch(0.985 0 0);
+  --sidebar-border: oklch(1 0 0 / 10%);
+  --sidebar-ring: oklch(0.556 0 0);
+  --overlay: oklch(0 0 0 / 45%);
+}
+
+@theme inline {
+  --font-sans: var(--font-body);
+  --color-background: var(--background);
+  --color-foreground: var(--foreground);
+  --color-card: var(--card);
+  --color-card-foreground: var(--card-foreground);
+  --color-popover: var(--popover);
+  --color-popover-foreground: var(--popover-foreground);
+  --color-primary: var(--primary);
+  --color-primary-foreground: var(--primary-foreground);
+  --color-secondary: var(--secondary);
+  --color-secondary-foreground: var(--secondary-foreground);
+  --color-muted: var(--muted);
+  --color-muted-foreground: var(--muted-foreground);
+  --color-accent: var(--accent);
+  --color-accent-foreground: var(--accent-foreground);
+  --color-destructive: var(--destructive);
+  --color-border: var(--border);
+  --color-input: var(--input);
+  --color-ring: var(--ring);
+  --color-sidebar: var(--sidebar);
+  --color-sidebar-foreground: var(--sidebar-foreground);
+  --color-sidebar-primary: var(--sidebar-primary);
+  --color-sidebar-primary-foreground: var(--sidebar-primary-foreground);
+  --color-sidebar-accent: var(--sidebar-accent);
+  --color-sidebar-accent-foreground: var(--sidebar-accent-foreground);
+  --color-sidebar-border: var(--sidebar-border);
+  --color-sidebar-ring: var(--sidebar-ring);
+  --color-overlay: var(--overlay);
+  --radius-sm: calc(var(--radius) - 4px);
+  --radius-md: calc(var(--radius) - 2px);
+  --radius-lg: var(--radius);
+  --radius-xl: calc(var(--radius) + 4px);
+}
+
+@layer base {
+  * {
+    @apply border-border outline-ring/50;
+  }
+  body {
+    @apply bg-background text-foreground;
+  }
+}

tokens.css

@@ -1,20 +1,20 @@
-/* Hallmark · macrostructure: Workbench · tone: compact · anchor hue: Twitter blue */
+/* Hallmark · macrostructure: Workbench · tone: compact · anchor hue: neutral */
 /* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V4 */
 :root {
-  --color-canvas: oklch(19% 0.021 250);
-  --color-paper: oklch(24% 0.025 250);
-  --color-paper-2: oklch(28% 0.027 250);
-  --color-paper-3: oklch(33% 0.031 250);
-  --color-ink: oklch(95% 0.005 250);
-  --color-ink-2: oklch(85% 0.015 250);
-  --color-muted: oklch(72% 0.025 250);
-  --color-accent: oklch(72% 0.15 240);
-  --color-accent-hover: oklch(79% 0.13 240);
-  --color-accent-ink: oklch(18% 0.03 250);
-  --color-rule: oklch(34% 0.023 250);
-  --color-control-rule: oklch(47% 0.029 250);
-  --color-focus: oklch(79% 0.13 240);
-  --color-error: oklch(78% 0.13 20);
+  --color-canvas: var(--background);
+  --color-paper: var(--background);
+  --color-paper-2: var(--card);
+  --color-paper-3: var(--muted);
+  --color-ink: var(--foreground);
+  --color-ink-2: var(--foreground);
+  --color-muted: var(--muted-foreground);
+  --color-accent: var(--primary);
+  --color-accent-hover: var(--foreground);
+  --color-accent-ink: var(--primary-foreground);
+  --color-rule: var(--border);
+  --color-control-rule: var(--input);
+  --color-focus: var(--ring);
+  --color-error: var(--destructive);
   --color-success: oklch(78% 0.13 155);
   --color-shadow: oklch(10% 0.015 250 / 45%);
   --color-overlay: oklch(10% 0.015 250 / 70%);

vite.config.ts

@@ -1,8 +1,9 @@
+import tailwindcss from '@tailwindcss/vite'
 import { tanstackStart } from '@tanstack/react-start/plugin/vite'
 import viteReact from '@vitejs/plugin-react'
 import { nitro } from 'nitro/vite'
 import { defineConfig } from 'vite'
 
 export default defineConfig({
-  plugins: [nitro(), tanstackStart(), viteReact()],
+  plugins: [tailwindcss(), nitro(), tanstackStart(), viteReact()],
 })