feat(settings): add third-party integrations dashboard

Add a Settings → Integrations page for installing and managing the three
supported OpenCode provider plugins (Claude Code, Command Code, Cursor),
with search, i18n, and plugin-registry status wiring.

Co-authored-by: Serhii Dziupin <makeittech@users.noreply.github.com>

packages/ui/src/lib/settings/metadata.ts

@@ -25,7 +25,8 @@ export type SettingsPageSlug =
   | 'notifications'
   | 'voice'
   | 'tunnel'
-  | 'about';
+  | 'about'
+  | 'integrations';
 
 type SettingsPageGroup =
   | 'general'
@@ -201,6 +202,7 @@ export const SETTINGS_PAGE_METADATA: readonly SettingsPageMeta[] = [
   { slug: 'voice', title: 'Voice', group: 'general', kind: 'single', keywords: ['tts', 'speech', 'voice'], isAvailable: (ctx) => !ctx.isVSCode },
   { slug: 'tunnel', title: 'External Tunnel', group: 'projects', kind: 'single', keywords: ['tunnel', 'external', 'cloudflare', 'qr', 'remote', 'mobile', 'share'], isAvailable: (ctx) => !ctx.isVSCode },
   { slug: 'about', title: 'About', group: 'general', kind: 'single', keywords: ['about', 'version', 'updates', 'release', 'changelog'], isAvailable: (ctx) => ctx.isMobile && !ctx.isVSCode },
+  { slug: 'integrations', title: 'Integrations', group: 'general', kind: 'single', keywords: ['integration', 'plugin', 'provider', 'oauth', 'claude', 'cursor', 'command code', 'connect'] },
 ] as const;
 
 const LEGACY_SIDEBAR_SECTION_TO_SETTINGS_SLUG: Record<SidebarSection, SettingsPageSlug> = {
@@ -286,6 +288,9 @@ export function getSettingsNavIcon(slug: SettingsPageSlug): IconName | null {
     case 'git':
       return 'git-branch';
 
+    case 'integrations':
+      return 'plug';
+
     case 'usage':
       return 'bar-chart-2';
     case 'voice':

packages/ui/src/lib/settings/search.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, test } from 'bun:test';
+import type { I18nKey } from '@/lib/i18n/store';
+import { buildSettingsSearchResults } from './search';
+
+const t = (key: I18nKey): string => key;
+
+const runtimeCtx = {
+  isVSCode: false,
+  isWeb: true,
+  isDesktop: false,
+  isMobile: false,
+  isDesktopLocalOrigin: false,
+  isMac: false,
+  isWindows: false,
+  isLinux: false,
+  isWindowsArm64: false,
+};
+
+describe('settings search', () => {
+  test('finds the Claude Code third-party integration', () => {
+    const results = buildSettingsSearchResults({
+      query: 'claude',
+      runtimeCtx,
+      t,
+      getPageTitle: (page) => page,
+    });
+
+    expect(results.some((result) => result.id === 'integrations.third-party.opencode-claude')).toBe(true);
+  });
+});

packages/ui/src/lib/settings/search.ts

@@ -933,6 +933,34 @@ const SETTINGS_SEARCH_ITEMS: readonly SettingsSearchItem[] = [
     keywords: ['background', 'push'],
     isAvailable: (ctx) => ctx.isWeb && !ctx.isDesktop && !ctx.isVSCode,
   },
+
+  {
+    id: 'integrations.third-party',
+    page: 'integrations',
+    titleKey: 'settings.integrations.thirdParty.title',
+    keywords: ['plugin', 'provider', 'oauth', 'install', 'update', 'remove'],
+  },
+  {
+    id: 'integrations.third-party.opencode-claude',
+    page: 'integrations',
+    titleKey: 'settings.integrations.thirdParty.opencodeClaude.name',
+    descriptionKey: 'settings.integrations.thirdParty.opencodeClaude.description',
+    keywords: ['claude', 'anthropic', 'claude code', 'pro', 'max', 'agent sdk'],
+  },
+  {
+    id: 'integrations.third-party.opencode-commandcode',
+    page: 'integrations',
+    titleKey: 'settings.integrations.thirdParty.opencodeCommandcode.name',
+    descriptionKey: 'settings.integrations.thirdParty.opencodeCommandcode.description',
+    keywords: ['command code', 'commandcode', 'laguna', 'poolside', 'gateway'],
+  },
+  {
+    id: 'integrations.third-party.opencode-cursor-oauth',
+    page: 'integrations',
+    titleKey: 'settings.integrations.thirdParty.opencodeCursorOauth.name',
+    descriptionKey: 'settings.integrations.thirdParty.opencodeCursorOauth.description',
+    keywords: ['cursor', 'oauth', 'subscription', 'openai compatible'],
+  },
 ] as const;
 
 interface BuildSettingsSearchResultsOptions {