From 195d1bded4e3bccfcdf2c289137a3394ec69267e Mon Sep 17 00:00:00 2001
From: XiaoSeS <87064762+XiaoSeS@users.noreply.github.com>
Date: Wed, 14 Oct 2026 19:41:18 +0800
Subject: [PATCH] feat(frontend): refine shadcn UI foundations

Signed-off-by: XiaoSeS <87064762+XiaoSeS@users.noreply.github.com>
---
 .../refine-shadcn-ui-foundation/design.md     |  32 +++++
 .../refine-shadcn-ui-foundation/proposal.md   |  26 ++++
 .../specs/shared-ui-foundation/spec.md        |  61 +++++++++
 .../refine-shadcn-ui-foundation/tasks.md      |  14 ++
 web/components.json                           |   7 +-
 web/e2e/fixtures/ui-foundation.html           |   2 +
 web/e2e/fixtures/ui-foundation.tsx            |  44 +++++++
 web/e2e/ui-foundation.spec.ts                 |  91 +++++++++++++
 web/src/index.css                             |  39 +++++-
 web/src/shared/ui/button.test.ts              |   6 +-
 web/src/shared/ui/button.tsx                  |   6 +-
 web/src/shared/ui/card.tsx                    |  12 +-
 web/src/shared/ui/input.tsx                   |   2 +-
 web/src/shared/ui/select.test.ts              |   2 +-
 web/src/shared/ui/select.tsx                  |   4 +-
 web/src/shared/ui/table.tsx                   |   4 +-
 web/src/shared/ui/tabs.behavior.test.tsx      | 123 ++++++++++++++++++
 web/src/shared/ui/tabs.tsx                    | 101 +++++++++++---
 web/src/shared/ui/textarea.tsx                |   2 +-
 web/tailwind.config.ts                        |  34 +++--
 20 files changed, 545 insertions(+), 67 deletions(-)
 create mode 100644 openspec/changes/refine-shadcn-ui-foundation/design.md
 create mode 100644 openspec/changes/refine-shadcn-ui-foundation/proposal.md
 create mode 100644 openspec/changes/refine-shadcn-ui-foundation/specs/shared-ui-foundation/spec.md
 create mode 100644 openspec/changes/refine-shadcn-ui-foundation/tasks.md
 create mode 100644 web/e2e/fixtures/ui-foundation.html
 create mode 100644 web/e2e/fixtures/ui-foundation.tsx
 create mode 100644 web/e2e/ui-foundation.spec.ts
 create mode 100644 web/src/shared/ui/tabs.behavior.test.tsx

diff --git a/openspec/changes/refine-shadcn-ui-foundation/design.md b/openspec/changes/refine-shadcn-ui-foundation/design.md
new file mode 100644
index 00000000..e7388e8d
--- /dev/null
+++ b/openspec/changes/refine-shadcn-ui-foundation/design.md
@@ -0,0 +1,32 @@
+## Approach
+
+Keep component source in `web/src/shared/ui` and use explicit shadcn aliases for UI, composition,
+utilities and hooks. Compare compatible upstream source before adapting individual components;
+existing APIs, variants, native attributes, refs and event behavior remain the compatibility baseline.
+
+CSS custom properties own semantic colors, fonts and density. Tailwind consumes these properties.
+Regular density remains the default; `data-density="compact"` changes control height and surface
+spacing without shrinking default control text. Explicit caller classes and styles remain effective.
+Table headings and cells share horizontal padding. Portal content must retain usable independent sizing.
+
+Preserve self-hosted Inter and JetBrains Mono and platform-appropriate fallback fonts. Provide semantic
+status colors in both themes, visible focus and invalid styling, and reduced-motion treatment.
+
+Keep the existing Tabs API and panel mounting behavior. Navigate enabled triggers in their rendered
+order with arrow keys and Home/End; respect horizontal direction. A valid enabled selection is the
+tab stop, otherwise the first enabled trigger is. Recomputing a tab stop must not change selection
+or invoke `onValueChange`. An entirely disabled list has no actionable tab stop. Trigger IDs/aria-controls and panel IDs/aria-labelledby
+are reserved for the generated association; other supported native attributes and refs remain available.
+
+## Validation
+
+Use component behavior tests and an isolated browser fixture for keyboard, density and validation
+contracts. Verify light/dark and regular/compact combinations plus representative page layouts.
+Keep test fixtures out of production entry points. Actual backend smoke results are reported separately
+from UI fixtures; successful frontend tests alone do not establish backend integration health.
+
+## Risks
+
+Shared font and spacing changes affect many callers. Check existing variants and explicit class/style
+overrides, table alignment, nested portals and responsive layouts before accepting the change.
+No dependency migration or global component replacement is required.
diff --git a/openspec/changes/refine-shadcn-ui-foundation/proposal.md b/openspec/changes/refine-shadcn-ui-foundation/proposal.md
new file mode 100644
index 00000000..9b87d3f6
--- /dev/null
+++ b/openspec/changes/refine-shadcn-ui-foundation/proposal.md
@@ -0,0 +1,26 @@
+## Why
+
+Shared controls need a consistent foundation for future page work. The current shadcn configuration
+does not explicitly resolve the UI directory, CSS and Tailwind disagree on the sans-serif font,
+and shared controls do not expose a consistent density or validation treatment. Tabs also need
+complete basic keyboard navigation while preserving optional controlled and uncontrolled values.
+
+## What Changes
+
+- Resolve shadcn aliases to the existing shared directories without replacing component APIs.
+- Align self-hosted fonts and semantic light/dark tokens, and add regular/compact container density.
+- Apply shared density, focus and invalid states to existing controls, cards and tables.
+- Complete Tabs keyboard navigation and retain an entry point when selection is absent or invalid.
+- Add behavior-focused regression coverage and verify representative existing pages.
+
+## Capabilities
+
+### New Capabilities
+
+- `shared-ui-foundation`: shared theme, density, component compatibility and keyboard behavior.
+
+## Impact
+
+Changes are limited to frontend configuration, theme, shared UI components and regression tests.
+React 19, Tailwind 3, existing Radix primitives and current business behavior are retained.
+This change does not redesign business pages or add a global shortcut system.
diff --git a/openspec/changes/refine-shadcn-ui-foundation/specs/shared-ui-foundation/spec.md b/openspec/changes/refine-shadcn-ui-foundation/specs/shared-ui-foundation/spec.md
new file mode 100644
index 00000000..eb665f72
--- /dev/null
+++ b/openspec/changes/refine-shadcn-ui-foundation/specs/shared-ui-foundation/spec.md
@@ -0,0 +1,61 @@
+## ADDED Requirements
+
+### Requirement: Component generation uses existing shared directories
+The project SHALL configure shadcn aliases to generate UI primitives into `src/shared/ui` and
+resolve imports using the existing TypeScript and Vite aliases.
+
+#### Scenario: Preview a new component
+- **WHEN** a representative component is previewed with the compatible CLI
+- **THEN** its UI file resolves into `src/shared/ui`, without a nested `ui/ui` directory
+- **AND** dependencies and source changes can be reviewed before applying them
+
+### Requirement: Shared theme and density are consistent
+The frontend SHALL use consistent self-hosted font families and semantic light/dark colors.
+Shared controls SHALL support regular and compact container density without reducing default text size.
+
+#### Scenario: Switch density
+- **WHEN** a container switches from regular to compact
+- **THEN** default controls change from 36px to 32px and card/table spacing follows the shared density
+- **AND** table heading and data text remain horizontally aligned
+- **AND** caller-provided class and style overrides remain effective
+
+#### Scenario: Validation and reduced motion
+- **WHEN** a form control is invalid or receives keyboard focus
+- **THEN** it has visible invalid or focus treatment appropriate to the selected theme
+- **WHEN** reduced motion is requested
+- **THEN** nonessential shared control motion is suppressed
+
+### Requirement: Existing component contracts remain compatible
+Shared component changes SHALL retain existing variants, native attributes, refs, events, controlled
+and uncontrolled values, form semantics, portal behavior and panel mounting behavior.
+
+#### Scenario: Reuse an existing button variant
+- **WHEN** a page renders an existing variant such as `soft`
+- **THEN** the variant remains available and existing caller attributes are honored
+
+### Requirement: Tabs are keyboard accessible
+Tabs SHALL support arrow-key navigation, Home/End and disabled-item skipping using the current
+horizontal direction. At least one enabled trigger SHALL provide a keyboard entry when available.
+
+#### Scenario: Navigate enabled tabs
+- **WHEN** the user presses a navigation key on a tab
+- **THEN** focus and selection follow the intended enabled trigger in rendered order
+- **AND** disabled triggers are skipped
+
+#### Scenario: Missing or invalid selection
+- **WHEN** selection is absent, invalid, removed or disabled and an enabled trigger exists
+- **THEN** the first enabled trigger remains reachable with Tab
+- **AND** establishing that entry does not change selection or invoke the selection callback
+
+#### Scenario: All triggers are disabled
+- **WHEN** every trigger is disabled
+- **THEN** no trigger is exposed as an actionable keyboard entry
+
+### Requirement: Regression evidence is repeatable
+The change SHALL include repeatable component regression tests and pass relevant frontend checks.
+Browser fixtures SHALL be separate from production entry points.
+
+#### Scenario: Validate component behavior independently
+- **WHEN** the component fixture is tested without a backend
+- **THEN** keyboard and density assertions run against actual shared components
+- **AND** the result is described as component verification rather than backend acceptance
diff --git a/openspec/changes/refine-shadcn-ui-foundation/tasks.md b/openspec/changes/refine-shadcn-ui-foundation/tasks.md
new file mode 100644
index 00000000..838220be
--- /dev/null
+++ b/openspec/changes/refine-shadcn-ui-foundation/tasks.md
@@ -0,0 +1,14 @@
+## Implementation
+
+- [x] 1. Inspect existing components, callers, tokens and compatible shadcn configuration.
+- [x] 2. Correct aliases and verify CLI project information and a representative dry-run.
+- [x] 3. Align fonts, semantic colors, density and shared validation/focus treatment.
+- [x] 4. Complete Tabs navigation and missing-selection keyboard entry behavior.
+- [x] 5. Add repeatable behavior and browser regression tests.
+
+## Verification
+
+- [x] 6. Pass relevant frontend typecheck, lint, unit tests and production build.
+- [x] 7. Verify light/dark, regular/compact and desktop/mobile component behavior.
+- [x] 8. Check representative existing pages, overrides and production entry isolation.
+- [x] 9. Record actual verification results and any unverified integration layers.
diff --git a/web/components.json b/web/components.json
index 7d38f61b..290cfae9 100644
--- a/web/components.json
+++ b/web/components.json
@@ -10,7 +10,10 @@
     "cssVariables": true
   },
   "aliases": {
-    "components": "@/shared/ui",
-    "utils": "@/shared/lib/utils"
+    "components": "@/shared/components",
+    "ui": "@/shared/ui",
+    "utils": "@/shared/lib/utils",
+    "lib": "@/shared/lib",
+    "hooks": "@/shared/hooks"
   }
 }
diff --git a/web/e2e/fixtures/ui-foundation.html b/web/e2e/fixtures/ui-foundation.html
new file mode 100644
index 00000000..125f22d7
--- /dev/null
+++ b/web/e2e/fixtures/ui-foundation.html
@@ -0,0 +1,2 @@
+<!doctype html>
+<html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Shared UI regression fixture</title><link rel="stylesheet" href="/fonts/fonts.css"></head><body><div id="root"></div><div id="skillhub-portals"></div><script type="module" src="./ui-foundation.tsx"></script></body></html>
diff --git a/web/e2e/fixtures/ui-foundation.tsx b/web/e2e/fixtures/ui-foundation.tsx
new file mode 100644
index 00000000..83f793fd
--- /dev/null
+++ b/web/e2e/fixtures/ui-foundation.tsx
@@ -0,0 +1,44 @@
+import { useState } from 'react'
+import { createRoot } from 'react-dom/client'
+import { Tabs, TabsList, TabsTrigger, TabsContent } from '@/shared/ui/tabs'
+import { Table, TableHeader, TableBody, TableRow, TableHead, TableCell } from '@/shared/ui/table'
+import { Button } from '@/shared/ui/button'
+import { Input } from '@/shared/ui/input'
+import { Textarea } from '@/shared/ui/textarea'
+import { Card, CardHeader } from '@/shared/ui/card'
+import '@/index.css'
+
+const params = new URLSearchParams(location.search)
+const mode = params.get('mode')
+document.documentElement.classList.toggle('dark', params.get('theme') === 'dark')
+document.documentElement.dir = params.get('dir') === 'rtl' ? 'rtl' : 'ltr'
+
+function Fixture() {
+  const [value, setValue] = useState(mode === 'missing' || mode === 'all-disabled' ? 'missing' : mode === 'empty' || mode === 'none' ? '' : mode === 'selected' ? 'second' : 'first')
+  const [changes, setChanges] = useState(0)
+  const [disabled, setDisabled] = useState(mode === 'disabled')
+  const [removed, setRemoved] = useState(false)
+  const allDisabled = mode === 'all-disabled'
+  return <main data-density={params.get('density') ?? 'regular'}>
+    <button id="before">Before tabs</button>
+    <Tabs {...(mode === 'none' ? {} : { value })} onValueChange={next => { setValue(next); setChanges(count => count + 1) }}>
+      <TabsList><TabsTrigger value="first" disabled={allDisabled}>First</TabsTrigger>
+        {!removed && <TabsTrigger value="second" disabled={allDisabled || disabled}>Second</TabsTrigger>}
+        <TabsTrigger value="third" disabled={allDisabled}>Third</TabsTrigger></TabsList>
+      <TabsContent value="first">first content</TabsContent><TabsContent value="second">second content</TabsContent><TabsContent value="third">third content</TabsContent>
+    </Tabs>
+    <button id="after">After tabs</button>
+    <button onClick={() => setDisabled(true)}>Disable second</button><button onClick={() => setRemoved(true)}>Remove second</button>
+    <output data-testid="changes">{changes}</output>
+    <Table><TableHeader><TableRow><TableHead>Skill</TableHead></TableRow></TableHeader><TableBody><TableRow><TableCell>Example</TableCell></TableRow></TableBody></Table>
+    <label htmlFor="normal">Name</label><Input id="normal" />
+    <label htmlFor="invalid">Version</label><Input id="invalid" aria-invalid="true" aria-describedby="error" /><p id="error">Enter a valid version.</p>
+    <Textarea aria-label="Description" aria-invalid="true" />
+    <Button data-testid="default-control">Save</Button><Button variant="soft">Soft</Button>
+    <Button data-testid="class-override" className="h-12">Large caller</Button>
+    <Input aria-label="Style override" style={{ height: 52 }} />
+    <Card className="shadow-none" data-testid="card"><CardHeader>Card</CardHeader></Card>
+  </main>
+}
+
+createRoot(document.getElementById('root')!).render(<Fixture />)
diff --git a/web/e2e/ui-foundation.spec.ts b/web/e2e/ui-foundation.spec.ts
new file mode 100644
index 00000000..308d8328
--- /dev/null
+++ b/web/e2e/ui-foundation.spec.ts
@@ -0,0 +1,91 @@
+import { expect, test } from '@playwright/test'
+
+const fixture = '/e2e/fixtures/ui-foundation.html'
+
+for (const mode of ['none', 'empty', 'missing']) {
+  test(`tabs provide entry without selecting when value is ${mode}`, async ({ page }) => {
+    await page.goto(`${fixture}?mode=${mode}`)
+    await expect(page.getByRole('tab', { selected: true })).toHaveCount(0)
+    await expect(page.getByTestId('changes')).toHaveText('0')
+    await expect(page.locator('[role="tab"][tabindex="0"]')).toHaveCount(1)
+    await page.locator('#before').focus()
+    await page.keyboard.press('Tab')
+    await expect(page.getByRole('tab', { name: 'First' })).toBeFocused()
+    await expect(page.getByTestId('changes')).toHaveText('0')
+    await page.keyboard.press('ArrowRight')
+    await expect(page.getByRole('tab', { name: 'Second' })).toBeFocused()
+    await expect(page.getByRole('tabpanel')).toHaveText('second content')
+    await expect(page.getByTestId('changes')).toHaveText('1')
+  })
+}
+
+for (const action of ['Disable second', 'Remove second']) {
+  test(`tabs recover keyboard entry after ${action}`, async ({ page }) => {
+    await page.goto(`${fixture}?mode=selected`)
+    await expect(page.getByRole('tab', { name: 'Second' })).toHaveAttribute('tabindex', '0')
+    await page.getByRole('button', { name: action, exact: true }).click()
+    await expect(page.getByTestId('changes')).toHaveText('0')
+    await expect(page.locator('[role="tab"][tabindex="0"]')).toHaveCount(1)
+    await page.locator('#before').focus()
+    await page.keyboard.press('Tab')
+    await expect(page.getByRole('tab', { name: 'First' })).toBeFocused()
+    await expect(page.getByTestId('changes')).toHaveText('0')
+    await page.keyboard.press('ArrowRight')
+    await expect(page.getByRole('tab', { name: 'Third' })).toBeFocused()
+  })
+}
+
+for (const dir of ['ltr', 'rtl']) {
+  test(`tabs wrap and skip disabled triggers in ${dir}`, async ({ page }) => {
+    await page.goto(`${fixture}?mode=disabled&dir=${dir}`)
+    await page.locator('#before').focus()
+    await page.keyboard.press('Tab')
+    await page.keyboard.press(dir === 'rtl' ? 'ArrowLeft' : 'ArrowRight')
+    await expect(page.getByRole('tab', { name: 'Third' })).toBeFocused()
+    await page.keyboard.press(dir === 'rtl' ? 'ArrowLeft' : 'ArrowRight')
+    await expect(page.getByRole('tab', { name: 'First' })).toBeFocused()
+    await page.keyboard.press('End')
+    await expect(page.getByRole('tab', { name: 'Third' })).toBeFocused()
+    await page.keyboard.press('Home')
+    await expect(page.getByRole('tab', { name: 'First' })).toBeFocused()
+    await page.keyboard.press(dir === 'rtl' ? 'ArrowRight' : 'ArrowLeft')
+    await expect(page.getByRole('tab', { name: 'Third' })).toBeFocused()
+  })
+}
+
+test('all-disabled tabs let Tab leave the list', async ({ page }) => {
+  await page.goto(`${fixture}?mode=all-disabled`)
+  await expect(page.locator('[role="tab"][tabindex="0"]')).toHaveCount(0)
+  await page.locator('#before').focus()
+  await page.keyboard.press('Tab')
+  await expect(page.locator('#after')).toBeFocused()
+  await expect(page.getByTestId('changes')).toHaveText('0')
+})
+
+for (const density of ['regular', 'compact']) {
+  for (const theme of ['light', 'dark']) {
+    test(`controls retain density, overrides and visible states: ${theme}/${density}`, async ({ page }) => {
+      await page.goto(`${fixture}?density=${density}&theme=${theme}`)
+      const padding = density === 'compact' ? '8px' : '12px'
+      for (const property of ['padding-left', 'padding-right']) {
+        await expect(page.getByRole('columnheader')).toHaveCSS(property, padding)
+        await expect(page.getByRole('cell')).toHaveCSS(property, padding)
+      }
+      await expect(page.getByTestId('default-control')).toHaveCSS('height', density === 'compact' ? '32px' : '36px')
+      await expect(page.getByLabel('Name', { exact: true })).toHaveCSS('height', density === 'compact' ? '32px' : '36px')
+      await expect(page.getByTestId('class-override')).toHaveCSS('height', '48px')
+      await expect(page.getByLabel('Style override')).toHaveCSS('height', '52px')
+      await expect(page.getByTestId('card')).toHaveCSS('box-shadow', /(?:none|rgba\(0, 0, 0, 0\))/)
+      const normal = page.getByLabel('Name', { exact: true })
+      const invalid = page.getByLabel('Version')
+      expect(await invalid.evaluate(el => getComputedStyle(el).borderColor)).not.toBe(await normal.evaluate(el => getComputedStyle(el).borderColor))
+      await expect(invalid).toHaveAccessibleDescription('Enter a valid version.')
+      await normal.focus()
+      await expect(normal).toHaveCSS('box-shadow', /.+/)
+      expect(await normal.evaluate(el => getComputedStyle(el).boxShadow)).not.toBe('none')
+      await page.emulateMedia({ reducedMotion: 'reduce' })
+      const duration = await page.getByTestId('default-control').evaluate(el => getComputedStyle(el).transitionDuration)
+      expect(duration.split(',').every(value => parseFloat(value) <= 0.001)).toBe(true)
+    })
+  }
+}
diff --git a/web/src/index.css b/web/src/index.css
index f227a8a8..7b243c4e 100644
--- a/web/src/index.css
+++ b/web/src/index.css
@@ -4,6 +4,8 @@
 
 @layer base {
   :root {
+    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
+    --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
     /* ═══════════════════════════════════════════
        SkillHub — 白 + 近黑（ref: skillhub-clone, TabTin, skillhub.cn）
        纯白底，冷灰卡片 #f2f3f5，近黑按钮 #202020
@@ -44,8 +46,12 @@
     --surface-glass: 0 0% 100%;
     --glow-primary: 0 0% 13%;
     --glow-accent: 0 0% 7%;
-    --success: 160 50% 40%;
-    --warning: 38 85% 50%;
+    --success: 160 60% 28%;
+    --success-foreground: 0 0% 100%;
+    --info: 217 75% 45%;
+    --info-foreground: 0 0% 100%;
+    --warning: 38 90% 50%;
+    --warning-foreground: 26 60% 12%;
 
     /* ── 品牌渐变 — 无（纯黑） ── */
     --brand-start: #202020;
@@ -66,6 +72,21 @@
     --shadow-btn-primary: 0 1px 2px 0 rgb(0 0 0 / 0.06);
   }
 
+  :root,
+  [data-density="regular"] {
+    --control-height: 2.25rem;
+    --control-padding-x: 0.75rem;
+    --table-cell-padding: 0.75rem;
+    --card-padding: 1.25rem;
+  }
+
+  [data-density="compact"] {
+    --control-height: 2rem;
+    --control-padding-x: 0.625rem;
+    --table-cell-padding: 0.5rem;
+    --card-padding: 1rem;
+  }
+
   .dark {
     /* ── 基础层 — 暗色保持近黑风格，但提高卡片对比度以改善 hover 可见性 ── */
     --background: 0 0% 6%;                 /* #0f0f0f */
@@ -100,8 +121,12 @@
     --surface-glass: 0 0% 10%;
     --glow-primary: 0 0% 80%;
     --glow-accent: 0 0% 60%;
-    --success: 160 45% 42%;
-    --warning: 38 80% 48%;
+    --success: 160 50% 48%;
+    --success-foreground: 160 70% 8%;
+    --info: 213 90% 70%;
+    --info-foreground: 220 60% 12%;
+    --warning: 38 90% 60%;
+    --warning-foreground: 26 60% 12%;
 
     /* ── 文字语义 — 提高可读性 ── */
     --text-secondary: 0 0% 75%;            /* 从 70% 提升 */
@@ -136,14 +161,14 @@
 
   body {
     @apply bg-background text-foreground antialiased;
-    font-family: 'Plus Jakarta Sans', -apple-system, 'system-ui', 'SF Pro Text', 'PingFang SC', 'HarmonyOS Sans SC', 'Noto Sans SC', system-ui, sans-serif;
+    font-family: var(--font-sans);
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
     text-rendering: optimizeLegibility;
   }
 
   h1, h2, h3, h4, h5, h6 {
-    font-family: 'Plus Jakarta Sans', -apple-system, 'system-ui', 'SF Pro Display', 'PingFang SC', 'HarmonyOS Sans SC', system-ui, sans-serif;
+    font-family: var(--font-sans);
     font-weight: 500;
     letter-spacing: -0.02em;
   }
@@ -160,7 +185,7 @@
   }
 
   code, pre, kbd {
-    font-family: 'JetBrains Mono', ui-monospace, monospace;
+    font-family: var(--font-mono);
   }
 
   /* Hide browser-native password reveal button (conflicts with custom toggle) */
diff --git a/web/src/shared/ui/button.test.ts b/web/src/shared/ui/button.test.ts
index 00eab706..5383e995 100644
--- a/web/src/shared/ui/button.test.ts
+++ b/web/src/shared/ui/button.test.ts
@@ -5,7 +5,7 @@ describe('buttonVariants', () => {
   it('applies default variant and size classes', () => {
     const classes = buttonVariants()
     expect(classes).toContain('bg-primary')
-    expect(classes).toContain('h-9')
+    expect(classes).toContain('h-[var(--control-height)]')
     expect(classes).toContain('px-4')
   })
 
@@ -55,8 +55,8 @@ describe('buttonVariants', () => {
 
   it('applies icon size classes', () => {
     const classes = buttonVariants({ size: 'icon' })
-    expect(classes).toContain('h-9')
-    expect(classes).toContain('w-9')
+    expect(classes).toContain('h-[var(--control-height)]')
+    expect(classes).toContain('w-[var(--control-height)]')
   })
 
   it('always includes base focus-visible and disabled styles', () => {
diff --git a/web/src/shared/ui/button.tsx b/web/src/shared/ui/button.tsx
index 58688f3b..ccf64b4d 100644
--- a/web/src/shared/ui/button.tsx
+++ b/web/src/shared/ui/button.tsx
@@ -4,7 +4,7 @@ import { cn } from '@/shared/lib/utils'
 
 const buttonVariants = cva(
   // 基础：紧致圆角、精准属性过渡、按下回弹、聚焦双层光晕
-  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-[transform,background-color,box-shadow,border-color] duration-150 ease-out focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 focus-visible:ring-offset-1 focus-visible:ring-offset-background disabled:pointer-events-none disabled:opacity-50 active:scale-[0.97] select-none',
+  'inline-flex items-center justify-center gap-2 whitespace-nowrap rounded-md text-sm font-medium transition-[transform,background-color,box-shadow,border-color] duration-150 ease-out focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring/40 focus-visible:ring-offset-1 focus-visible:ring-offset-background disabled:pointer-events-none disabled:opacity-50 active:scale-[0.97] motion-reduce:transform-none select-none',
   {
     variants: {
       variant: {
@@ -25,10 +25,10 @@ const buttonVariants = cva(
           'text-primary underline-offset-4 hover:underline active:scale-100',
       },
       size: {
-        default: 'h-9 px-4 py-2',
+        default: 'h-[var(--control-height)] px-4 py-2',
         sm: 'h-8 rounded-sm px-3 text-xs',
         lg: 'h-10 rounded-lg px-8',
-        icon: 'h-9 w-9',
+        icon: 'h-[var(--control-height)] w-[var(--control-height)]',
       },
     },
     defaultVariants: {
diff --git a/web/src/shared/ui/card.tsx b/web/src/shared/ui/card.tsx
index 8f58b32b..2eaa25a3 100644
--- a/web/src/shared/ui/card.tsx
+++ b/web/src/shared/ui/card.tsx
@@ -6,10 +6,10 @@ const Card = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElemen
     <div
       ref={ref}
       className={cn(
-        'rounded-md border border-border/60 bg-card text-card-foreground transition-[border-color,box-shadow,transform] duration-150 ease-out hover:border-[hsl(214_50%_88%)] hover:shadow-[var(--shadow-card-hover)]',
+        'rounded-md border border-border/60 bg-card text-card-foreground transition-[border-color,box-shadow,transform] duration-150 ease-out shadow-[var(--shadow-card)] hover:border-ring/20 hover:shadow-[var(--shadow-card-hover)]',
         className
       )}
-      style={{ boxShadow: 'var(--shadow-card)', ...style }}
+      style={style}
       {...props}
     />
   )
@@ -18,12 +18,12 @@ Card.displayName = 'Card'
 
 const CardHeader = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
   ({ className, ...props }, ref) => (
-    <div ref={ref} className={cn('flex flex-col space-y-1.5 p-5', className)} {...props} />
+    <div ref={ref} className={cn('flex flex-col space-y-1.5 p-[var(--card-padding)]', className)} {...props} />
   )
 )
 CardHeader.displayName = 'CardHeader'
 
-const CardTitle = React.forwardRef<HTMLParagraphElement, React.HTMLAttributes<HTMLHeadingElement>>(
+const CardTitle = React.forwardRef<HTMLHeadingElement, React.HTMLAttributes<HTMLHeadingElement>>(
   ({ className, ...props }, ref) => (
     <h3 ref={ref} className={cn('text-lg font-semibold font-heading leading-none tracking-tight', className)} {...props} />
   )
@@ -38,13 +38,13 @@ const CardDescription = React.forwardRef<HTMLParagraphElement, React.HTMLAttribu
 CardDescription.displayName = 'CardDescription'
 
 const CardContent = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
-  ({ className, ...props }, ref) => <div ref={ref} className={cn('p-5 pt-0', className)} {...props} />
+  ({ className, ...props }, ref) => <div ref={ref} className={cn('p-[var(--card-padding)] pt-0', className)} {...props} />
 )
 CardContent.displayName = 'CardContent'
 
 const CardFooter = React.forwardRef<HTMLDivElement, React.HTMLAttributes<HTMLDivElement>>(
   ({ className, ...props }, ref) => (
-    <div ref={ref} className={cn('flex items-center p-5 pt-0', className)} {...props} />
+    <div ref={ref} className={cn('flex items-center p-[var(--card-padding)] pt-0', className)} {...props} />
   )
 )
 CardFooter.displayName = 'CardFooter'
diff --git a/web/src/shared/ui/input.tsx b/web/src/shared/ui/input.tsx
index ae037e95..358dcd96 100644
--- a/web/src/shared/ui/input.tsx
+++ b/web/src/shared/ui/input.tsx
@@ -4,7 +4,7 @@ import { cn } from '@/shared/lib/utils'
 export interface InputProps extends React.InputHTMLAttributes<HTMLInputElement> {}
 
 export const INPUT_BASE_CLASS_NAME =
-  'flex h-9 w-full rounded-md border border-border/60 bg-background/40 px-3 py-1.5 text-sm text-foreground ring-offset-background transition-[border-color,box-shadow,background-color] duration-150 ease-out file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground/70 hover:border-border focus-visible:outline-none focus-visible:border-ring focus-visible:bg-background focus-visible:ring-4 focus-visible:ring-ring/15 disabled:cursor-not-allowed disabled:opacity-50'
+  'flex h-[var(--control-height)] w-full rounded-md border border-border/60 bg-background/40 px-[var(--control-padding-x)] py-1.5 text-sm text-foreground ring-offset-background transition-[border-color,box-shadow,background-color] duration-150 ease-out file:border-0 file:bg-transparent file:text-sm file:font-medium placeholder:text-muted-foreground/70 hover:border-border focus-visible:outline-none focus-visible:border-ring focus-visible:bg-background focus-visible:ring-4 focus-visible:ring-ring/15 aria-[invalid=true]:border-destructive aria-[invalid=true]:focus-visible:ring-destructive/20 disabled:cursor-not-allowed disabled:opacity-50'
 
 const Input = React.forwardRef<HTMLInputElement, InputProps>(
   ({ className, type, style, ...props }, ref) => {
diff --git a/web/src/shared/ui/select.test.ts b/web/src/shared/ui/select.test.ts
index 4f16cd54..c3f600b8 100644
--- a/web/src/shared/ui/select.test.ts
+++ b/web/src/shared/ui/select.test.ts
@@ -10,7 +10,7 @@ import {
 
 describe('shared select contract', () => {
   it('keeps the trigger aligned with the existing input styling language', () => {
-    expect(SELECT_TRIGGER_CLASS_NAME).toContain('h-9')
+    expect(SELECT_TRIGGER_CLASS_NAME).toContain('h-[var(--control-height)]')
     expect(SELECT_TRIGGER_CLASS_NAME).toContain('rounded-md')
     expect(SELECT_TRIGGER_CLASS_NAME).toContain('border-border/60')
     expect(SELECT_TRIGGER_CLASS_NAME).toContain('bg-background/40')
diff --git a/web/src/shared/ui/select.tsx b/web/src/shared/ui/select.tsx
index b22251fb..c2661b11 100644
--- a/web/src/shared/ui/select.tsx
+++ b/web/src/shared/ui/select.tsx
@@ -5,10 +5,10 @@ import { getPortalContainer } from '@/shared/lib/portal-container'
 import { cn } from '@/shared/lib/utils'
 
 export const SELECT_TRIGGER_CLASS_NAME = cn(
-  'flex h-9 w-full items-center justify-between gap-2 rounded-md border border-border/60 bg-background/40 px-3 py-1.5 text-sm text-foreground',
+  'flex h-[var(--control-height)] w-full items-center justify-between gap-2 rounded-md border border-border/60 bg-background/40 px-[var(--control-padding-x)] py-1.5 text-sm text-foreground',
   'ring-offset-background transition-[border-color,box-shadow,background-color] duration-150 ease-out',
   'hover:border-border focus-visible:outline-none focus-visible:border-ring focus-visible:bg-card focus-visible:ring-4 focus-visible:ring-ring/15',
-  'disabled:cursor-not-allowed disabled:opacity-50',
+  'aria-[invalid=true]:border-destructive aria-[invalid=true]:focus-visible:ring-destructive/20 disabled:cursor-not-allowed disabled:opacity-50',
   'data-[placeholder]:text-muted-foreground [&>span]:line-clamp-1'
 )
 
diff --git a/web/src/shared/ui/table.tsx b/web/src/shared/ui/table.tsx
index 5f87b746..c4ad74a8 100644
--- a/web/src/shared/ui/table.tsx
+++ b/web/src/shared/ui/table.tsx
@@ -38,7 +38,7 @@ const TableHead = React.forwardRef<HTMLTableCellElement, React.ThHTMLAttributes<
     <th
       ref={ref}
       className={cn(
-        'h-12 px-4 text-left align-middle font-medium font-heading text-sm text-muted-foreground [&:has([role=checkbox])]:pr-0',
+        'h-[var(--control-height)] px-[var(--table-cell-padding)] py-[var(--table-cell-padding)] text-left align-middle font-medium font-heading text-sm text-muted-foreground [&:has([role=checkbox])]:pr-0',
         className
       )}
       {...props}
@@ -49,7 +49,7 @@ TableHead.displayName = 'TableHead'
 
 const TableCell = React.forwardRef<HTMLTableCellElement, React.TdHTMLAttributes<HTMLTableCellElement>>(
   ({ className, ...props }, ref) => (
-    <td ref={ref} className={cn('p-4 align-middle [&:has([role=checkbox])]:pr-0', className)} {...props} />
+    <td ref={ref} className={cn('p-[var(--table-cell-padding)] align-middle [&:has([role=checkbox])]:pr-0', className)} {...props} />
   )
 )
 TableCell.displayName = 'TableCell'
diff --git a/web/src/shared/ui/tabs.behavior.test.tsx b/web/src/shared/ui/tabs.behavior.test.tsx
new file mode 100644
index 00000000..5822c4df
--- /dev/null
+++ b/web/src/shared/ui/tabs.behavior.test.tsx
@@ -0,0 +1,123 @@
+// @vitest-environment jsdom
+import { createRef, useState } from 'react'
+import { cleanup, fireEvent, render, screen, waitFor } from '@testing-library/react'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { Tabs, TabsList, TabsTrigger, TabsContent } from './tabs'
+
+afterEach(cleanup)
+
+function Example({ value, onValueChange = vi.fn() }: { value?: string; onValueChange?: (value: string) => void }) {
+  return (
+    <Tabs value={value} onValueChange={onValueChange}>
+      <TabsList aria-label="Options">
+        <TabsTrigger value="a">Alpha</TabsTrigger>
+        <TabsTrigger value="b" disabled>Beta</TabsTrigger>
+        <TabsTrigger value="c">Gamma</TabsTrigger>
+      </TabsList>
+      <TabsContent value="a">Alpha panel</TabsContent>
+      <TabsContent value="c">Gamma panel</TabsContent>
+    </Tabs>
+  )
+}
+
+describe('Tabs keyboard contract', () => {
+  it.each([undefined, 'missing', 'b'])('restores keyboard entry without choosing for value %s', (value) => {
+    const onValueChange = vi.fn()
+    render(<Example value={value} onValueChange={onValueChange} />)
+    const tabs = screen.getAllByRole('tab')
+    expect(tabs.map(tab => tab.tabIndex)).toEqual([0, -1, -1])
+    expect(onValueChange).not.toHaveBeenCalled()
+    expect(screen.queryByRole('tabpanel')).toBeNull()
+  })
+
+  it('navigates, wraps and skips disabled tabs; links the active panel', async () => {
+    render(<Example />)
+    const alpha = screen.getByRole('tab', { name: 'Alpha' })
+    const gamma = screen.getByRole('tab', { name: 'Gamma' })
+    fireEvent.keyDown(alpha, { key: 'ArrowRight' })
+    expect(document.activeElement).toBe(gamma)
+    const panel = screen.getByRole('tabpanel')
+    expect(panel.id).toBe(gamma.getAttribute('aria-controls'))
+    expect(panel.getAttribute('aria-labelledby')).toBe(gamma.id)
+    await waitFor(() => expect(gamma.tabIndex).toBe(0))
+    fireEvent.keyDown(gamma, { key: 'ArrowRight' })
+    expect(document.activeElement).toBe(alpha)
+    fireEvent.keyDown(alpha, { key: 'End' })
+    expect(document.activeElement).toBe(gamma)
+    fireEvent.keyDown(gamma, { key: 'Home' })
+    expect(document.activeElement).toBe(alpha)
+  })
+
+  it('honors RTL direction and controlled selection', () => {
+    const onValueChange = vi.fn()
+    render(
+      <Tabs value="a" onValueChange={onValueChange}>
+        <TabsList style={{ direction: 'rtl' }}>
+          <TabsTrigger value="a">Alpha</TabsTrigger>
+          <TabsTrigger value="b">Beta</TabsTrigger>
+          <TabsTrigger value="c">Gamma</TabsTrigger>
+        </TabsList>
+        <TabsContent value="a">Alpha panel</TabsContent>
+      </Tabs>
+    )
+    fireEvent.keyDown(screen.getByRole('tab', { name: 'Alpha' }), { key: 'ArrowRight' })
+    expect(document.activeElement).toBe(screen.getByRole('tab', { name: 'Gamma' }))
+    expect(onValueChange).toHaveBeenCalledWith('c')
+    expect(screen.getByRole('tab', { name: 'Alpha' }).getAttribute('aria-selected')).toBe('true')
+    expect(screen.getByRole('tabpanel').textContent).toBe('Alpha panel')
+  })
+
+  it('repairs entry after a descendant independently removes or disables selection', async () => {
+    const onValueChange = vi.fn()
+    function Triggers() {
+      const [state, setState] = useState(0)
+      return <>
+        <button onClick={() => setState(state + 1)}>Change</button>
+        {state < 2 && <TabsTrigger value="a" disabled={state === 1}>Alpha</TabsTrigger>}
+        <TabsTrigger value="c" disabled={state === 3}>Gamma</TabsTrigger>
+      </>
+    }
+    render(<Tabs value="a" onValueChange={onValueChange}><TabsList><Triggers /></TabsList></Tabs>)
+    fireEvent.click(screen.getByText('Change'))
+    await waitFor(() => expect(screen.getByRole('tab', { name: 'Gamma' }).tabIndex).toBe(0))
+    fireEvent.click(screen.getByText('Change'))
+    await waitFor(() => expect(screen.getByRole('tab', { name: 'Gamma' }).tabIndex).toBe(0))
+    fireEvent.click(screen.getByText('Change'))
+    await waitFor(() => expect(screen.getByRole('tab', { name: 'Gamma' }).tabIndex).toBe(-1))
+    expect(onValueChange).not.toHaveBeenCalled()
+  })
+
+  it('reserves linked IDs in types and at runtime for untyped callers', () => {
+    // @ts-expect-error Linked IDs are managed by Tabs rather than the caller.
+    const trigger = <TabsTrigger value="a" id="custom-tab" aria-controls="missing-panel">Alpha</TabsTrigger>
+    // @ts-expect-error Linked IDs are managed by Tabs rather than the caller.
+    const content = <TabsContent value="a" id="custom-panel" aria-labelledby="missing-tab">Panel</TabsContent>
+    render(<Tabs defaultValue="a"><TabsList>{trigger}</TabsList>{content}</Tabs>)
+    const tab = screen.getByRole('tab')
+    const panel = screen.getByRole('tabpanel')
+    expect(tab.id).not.toBe('custom-tab')
+    expect(panel.id).not.toBe('custom-panel')
+    expect(document.getElementById(tab.getAttribute('aria-controls')!)).toBe(panel)
+    expect(document.getElementById(panel.getAttribute('aria-labelledby')!)).toBe(tab)
+  })
+
+  it('forwards refs/native attributes and allows event cancellation', () => {
+    const listRef = createRef<HTMLDivElement>()
+    const triggerRef = createRef<HTMLButtonElement>()
+    const onValueChange = vi.fn()
+    render(
+      <Tabs defaultValue="a" onValueChange={onValueChange}>
+        <TabsList ref={listRef} aria-label="Choices" style={{ padding: 3 }}>
+          <TabsTrigger ref={triggerRef} value="a" title="First" onKeyDown={event => event.preventDefault()}>Alpha</TabsTrigger>
+          <TabsTrigger value="c" onClick={event => event.preventDefault()}>Gamma</TabsTrigger>
+        </TabsList>
+      </Tabs>
+    )
+    expect(listRef.current).toBe(screen.getByRole('tablist'))
+    expect(triggerRef.current?.title).toBe('First')
+    expect(listRef.current?.style.padding).toBe('3px')
+    fireEvent.keyDown(triggerRef.current!, { key: 'End' })
+    fireEvent.click(screen.getByRole('tab', { name: 'Gamma' }))
+    expect(onValueChange).not.toHaveBeenCalled()
+  })
+})
diff --git a/web/src/shared/ui/tabs.tsx b/web/src/shared/ui/tabs.tsx
index b43aaf8e..5750e56b 100644
--- a/web/src/shared/ui/tabs.tsx
+++ b/web/src/shared/ui/tabs.tsx
@@ -1,7 +1,7 @@
 import * as React from 'react'
 import { cn } from '@/shared/lib/utils'
 
-interface TabsProps {
+interface TabsProps extends Omit<React.ComponentPropsWithRef<'div'>, 'defaultValue' | 'onChange'> {
   defaultValue?: string
   value?: string
   children: React.ReactNode
@@ -12,12 +12,14 @@ interface TabsProps {
 interface TabsContextValue {
   value: string
   setValue: (value: string) => void
+  baseId: string
 }
 
 const TabsContext = React.createContext<TabsContextValue | undefined>(undefined)
 
-export function Tabs({ defaultValue, value: controlledValue, children, className, onValueChange }: TabsProps) {
+export function Tabs({ defaultValue, value: controlledValue, children, className, onValueChange, ...props }: TabsProps) {
   const [internalValue, setInternalValue] = React.useState(defaultValue ?? '')
+  const baseId = React.useId()
   const isControlled = controlledValue !== undefined
   const value = isControlled ? controlledValue : internalValue
 
@@ -29,40 +31,61 @@ export function Tabs({ defaultValue, value: controlledValue, children, className
   }, [isControlled, onValueChange])
 
   return (
-    <TabsContext.Provider value={{ value, setValue: handleValueChange }}>
-      <div className={className}>{children}</div>
+    <TabsContext.Provider value={{ value, setValue: handleValueChange, baseId }}>
+      <div className={className} {...props}>{children}</div>
     </TabsContext.Provider>
   )
 }
 
-interface TabsListProps {
-  children: React.ReactNode
-  className?: string
+function getTriggers(list: HTMLElement) {
+  return Array.from(list.querySelectorAll<HTMLButtonElement>('button[role="tab"]'))
+    .filter(tab => tab.closest('[role="tablist"]') === list)
 }
 
-export function TabsList({ children, className }: TabsListProps) {
+export function TabsList({ children, className, ref, ...props }: React.ComponentPropsWithRef<'div'>) {
+  const listRef = React.useRef<HTMLDivElement>(null)
+  React.useImperativeHandle(ref, () => listRef.current!, [])
+
+  React.useLayoutEffect(() => {
+    const list = listRef.current
+    if (!list) return
+    const updateTabStop = () => {
+      const tabs = getTriggers(list)
+      const entry = tabs.find(tab => !tab.disabled && tab.getAttribute('aria-selected') === 'true')
+        ?? tabs.find(tab => !tab.disabled)
+      // Restoring keyboard entry must not select a value or invoke business callbacks.
+      tabs.forEach(tab => { tab.tabIndex = tab === entry ? 0 : -1 })
+    }
+    updateTabStop()
+    // Descendants may change independently of TabsList (conditional or disabled triggers).
+    const observer = new MutationObserver(updateTabStop)
+    observer.observe(list, { subtree: true, childList: true, attributes: true, attributeFilter: ['disabled', 'aria-selected'] })
+    return () => observer.disconnect()
+  }, [])
+
   return (
     <div
+      ref={listRef}
       role="tablist"
-      className={cn(
-        'inline-flex items-center gap-6 border-b text-sm',
-        className
-      )}
-      style={{ borderColor: 'hsl(var(--border))' }}
+      className={cn('inline-flex items-center gap-6 border-b border-border text-sm', className)}
+      {...props}
     >
       {children}
     </div>
   )
 }
 
-interface TabsTriggerProps {
+interface TabsTriggerProps extends React.ComponentPropsWithRef<'button'> {
+  // IDs and their relationship are owned by Tabs, including for untyped callers.
+  id?: never
+  'aria-controls'?: never
   value: string
   children: React.ReactNode
   className?: string
   disabled?: boolean
 }
 
-export function TabsTrigger({ value, children, className, disabled = false }: TabsTriggerProps) {
+export function TabsTrigger({ value, children, className, disabled = false, onClick, onKeyDown, ...props }: TabsTriggerProps) {
   const context = React.useContext(TabsContext)
   if (!context) throw new Error('TabsTrigger must be used within Tabs')
 
@@ -74,33 +97,69 @@ export function TabsTrigger({ value, children, className, disabled = false }: Ta
       role="tab"
       aria-selected={isActive}
       aria-disabled={disabled}
+      tabIndex={isActive && !disabled ? 0 : -1}
       disabled={disabled}
-      onClick={() => context.setValue(value)}
+      onClick={(event) => {
+        onClick?.(event)
+        if (!event.defaultPrevented) context.setValue(value)
+      }}
+      onKeyDown={(event) => {
+        onKeyDown?.(event)
+        if (event.defaultPrevented || event.altKey || event.ctrlKey || event.metaKey) return
+        if (!['ArrowLeft', 'ArrowRight', 'Home', 'End'].includes(event.key)) return
+        const list = event.currentTarget.closest<HTMLElement>('[role="tablist"]')
+        if (!list) return
+        const tabs = getTriggers(list).filter(tab => !tab.disabled)
+        const index = tabs.indexOf(event.currentTarget)
+        if (index < 0) return
+        const direction = getComputedStyle(list).direction === 'rtl' ? -1 : 1
+        const step = event.key === 'ArrowRight' ? direction : -direction
+        const nextIndex = event.key === 'Home' ? 0 : event.key === 'End' ? tabs.length - 1 : (index + step + tabs.length) % tabs.length
+        event.preventDefault()
+        tabs[nextIndex].focus()
+        tabs[nextIndex].click()
+      }}
       data-state={isActive ? 'active' : 'inactive'}
       className={cn(
-        'inline-flex -mb-px items-center justify-center whitespace-nowrap py-3 text-sm font-medium transition-all duration-200 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50',
+        'inline-flex -mb-px items-center justify-center whitespace-nowrap py-3 text-sm font-medium transition-[color,border-color,background-color] duration-150 focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring disabled:pointer-events-none disabled:opacity-50',
         isActive
           ? 'border-b-2 border-primary text-primary'
-          : 'text-muted-foreground hover:text-foreground/80',
+          : 'border-b-2 border-transparent text-muted-foreground hover:text-foreground/80',
         className
       )}
+      {...props}
+      id={`${context.baseId}-tab-${value}`}
+      aria-controls={`${context.baseId}-panel-${value}`}
     >
       {children}
     </button>
   )
 }
 
-interface TabsContentProps {
+interface TabsContentProps extends React.ComponentPropsWithRef<'div'> {
+  id?: never
+  'aria-labelledby'?: never
   value: string
   children: React.ReactNode
   className?: string
 }
 
-export function TabsContent({ value, children, className }: TabsContentProps) {
+export function TabsContent({ value, children, className, ...props }: TabsContentProps) {
   const context = React.useContext(TabsContext)
   if (!context) throw new Error('TabsContent must be used within Tabs')
 
   if (context.value !== value) return null
 
-  return <div role="tabpanel" className={cn('animate-fade-in', className)}>{children}</div>
+  return (
+    <div
+      role="tabpanel"
+      tabIndex={0}
+      className={cn('animate-fade-in focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-ring', className)}
+      {...props}
+      id={`${context.baseId}-panel-${value}`}
+      aria-labelledby={`${context.baseId}-tab-${value}`}
+    >
+      {children}
+    </div>
+  )
 }
diff --git a/web/src/shared/ui/textarea.tsx b/web/src/shared/ui/textarea.tsx
index ab25d3b5..f628032a 100644
--- a/web/src/shared/ui/textarea.tsx
+++ b/web/src/shared/ui/textarea.tsx
@@ -8,7 +8,7 @@ const Textarea = React.forwardRef<HTMLTextAreaElement, TextareaProps>(
     return (
       <textarea
         className={cn(
-          'flex min-h-[100px] w-full rounded-lg border border-border/60 bg-secondary/50 px-4 py-3 text-sm text-foreground ring-offset-background transition-all duration-200 placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 focus-visible:border-primary/50 disabled:cursor-not-allowed disabled:opacity-50 resize-y',
+          'flex min-h-[100px] w-full rounded-lg border border-border/60 bg-secondary/50 px-4 py-3 text-sm text-foreground ring-offset-background transition-all duration-200 placeholder:text-muted-foreground focus-visible:outline-none focus-visible:ring-2 focus-visible:ring-primary/40 focus-visible:border-primary/50 aria-[invalid=true]:border-destructive aria-[invalid=true]:focus-visible:ring-destructive/20 disabled:cursor-not-allowed disabled:opacity-50 resize-y',
           className
         )}
         ref={ref}
diff --git a/web/tailwind.config.ts b/web/tailwind.config.ts
index 5739002f..c352e0b1 100644
--- a/web/tailwind.config.ts
+++ b/web/tailwind.config.ts
@@ -6,24 +6,10 @@ const config: Config = {
   theme: {
     extend: {
       fontFamily: {
-        display: ['Inter', 'system-ui', 'sans-serif'],
-        heading: ['Inter', 'system-ui', 'sans-serif'],
-        sans: ['Inter', '-apple-system', 'BlinkMacSystemFont', 'Segoe UI', 'Roboto', 'sans-serif'],
-        mono: [
-          'JetBrains Mono',
-          'SF Mono',
-          'Monaco',
-          'Inconsolata',
-          'Fira Mono',
-          'Droid Sans Mono',
-          'Source Code Pro',
-          'ui-monospace',
-          'SFMono-Regular',
-          'Menlo',
-          'Consolas',
-          'Liberation Mono',
-          'monospace'
-        ],
+        display: ['var(--font-sans)'],
+        heading: ['var(--font-sans)'],
+        sans: ['var(--font-sans)'],
+        mono: ['var(--font-mono)'],
       },
       borderRadius: {
         lg: 'var(--radius)',
@@ -63,6 +49,18 @@ const config: Config = {
           DEFAULT: 'hsl(var(--destructive))',
           foreground: 'hsl(var(--destructive-foreground))',
         },
+        info: {
+          DEFAULT: 'hsl(var(--info))',
+          foreground: 'hsl(var(--info-foreground))',
+        },
+        success: {
+          DEFAULT: 'hsl(var(--success))',
+          foreground: 'hsl(var(--success-foreground))',
+        },
+        warning: {
+          DEFAULT: 'hsl(var(--warning))',
+          foreground: 'hsl(var(--warning-foreground))',
+        },
         border: 'hsl(var(--border))',
         input: 'hsl(var(--input))',
         ring: 'hsl(var(--ring))',