feat(mcp): i18n + a11y McpStatusBadge status labels

app/src/components/channels/mcp/McpStatusBadge.test.tsx

@@ -0,0 +1,44 @@
+/**
+ * Tests for McpStatusBadge — renders the i18n'd label and a11y role
+ * for each ServerStatus, and forwards custom className.
+ */
+import { render, screen } from '@testing-library/react';
+import { describe, expect, it } from 'vitest';
+
+import McpStatusBadge from './McpStatusBadge';
+import type { ServerStatus } from './types';
+
+describe('McpStatusBadge', () => {
+  it.each<[ServerStatus, string]>([
+    ['connected', 'Connected'],
+    ['connecting', 'Connecting'],
+    ['disconnected', 'Disconnected'],
+    ['error', 'Error'],
+  ])('renders i18n label for status=%s', (status, expectedLabel) => {
+    render(<McpStatusBadge status={status} />);
+    expect(screen.getByRole('status')).toHaveTextContent(expectedLabel);
+  });
+
+  it('exposes role="status" and aria-live="polite" for assistive tech', () => {
+    render(<McpStatusBadge status="connecting" />);
+    const badge = screen.getByRole('status');
+    expect(badge).toHaveAttribute('aria-live', 'polite');
+  });
+
+  it('falls back to the disconnected style for an unknown status value', () => {
+    // ServerStatus is a closed union, but the runtime fallback exists for
+    // forward-compat with possible future Rust-side variants — exercise it.
+    render(<McpStatusBadge status={'spawning' as ServerStatus} />);
+    expect(screen.getByRole('status')).toHaveTextContent('Disconnected');
+  });
+
+  it('appends the optional className without dropping the built-in classes', () => {
+    render(<McpStatusBadge status="connected" className="ml-2 my-custom-class" />);
+    const badge = screen.getByRole('status');
+    expect(badge.className).toContain('my-custom-class');
+    expect(badge.className).toContain('ml-2');
+    // Built-in look-and-feel preserved.
+    expect(badge.className).toContain('rounded-full');
+    expect(badge.className).toContain('bg-sage-500/10');
+  });
+});

app/src/components/channels/mcp/McpStatusBadge.tsx

@@ -1,25 +1,28 @@
 /**
  * Status badge for MCP server connection states.
- * Mirrors ChannelStatusBadge but uses ServerStatus values.
+ * Mirrors ChannelStatusBadge but uses ServerStatus values; reuses the
+ * shared `channels.status.*` i18n keys since the label vocabulary is
+ * identical (Connected / Connecting / Disconnected / Error).
  */
+import { useT } from '../../../lib/i18n/I18nContext';
 import type { ServerStatus } from './types';
 
-const STATUS_STYLES: Record<ServerStatus, { label: string; className: string }> = {
+const STATUS_META: Record<ServerStatus, { i18nKey: string; className: string }> = {
   connected: {
-    label: 'Connected',
+    i18nKey: 'channels.status.connected',
     className: 'bg-sage-500/10 text-sage-700 border-sage-500/30 dark:text-sage-300',
   },
   connecting: {
-    label: 'Connecting',
+    i18nKey: 'channels.status.connecting',
     className: 'bg-amber-500/10 text-amber-700 border-amber-500/30 dark:text-amber-300',
   },
   disconnected: {
-    label: 'Disconnected',
+    i18nKey: 'channels.status.disconnected',
     className:
       'bg-stone-100 dark:bg-neutral-800 text-stone-500 dark:text-neutral-400 border-stone-200 dark:border-neutral-700',
   },
   error: {
-    label: 'Error',
+    i18nKey: 'channels.status.error',
     className: 'bg-coral-500/10 text-coral-700 border-coral-500/30 dark:text-coral-300',
   },
 };
@@ -30,11 +33,14 @@ interface McpStatusBadgeProps {
 }
 
 const McpStatusBadge = ({ status, className = '' }: McpStatusBadgeProps) => {
-  const style = STATUS_STYLES[status] ?? STATUS_STYLES.disconnected;
+  const { t } = useT();
+  const meta = STATUS_META[status] ?? STATUS_META.disconnected;
   return (
     <span
-      className={`shrink-0 px-2 py-1 text-[11px] border rounded-full ${style.className} ${className}`}>
-      {style.label}
+      role="status"
+      aria-live="polite"
+      className={`shrink-0 px-2 py-1 text-[11px] border rounded-full ${meta.className} ${className}`}>
+      {t(meta.i18nKey)}
     </span>
   );
 };