feat(settings): retire the third-party plugin integrations

Settings → Integrations offered install cards for the Claude Code and
Cursor provider plugins. They are gone: the section, its plugin catalog,
its own i18n module and tests, the settings search entries, the page
keywords, and the two sprite icons only it used. The page now holds the
built-in GitHub and Linear cards, so it is hidden in VS Code where neither
applies; its title and description live in the settings dictionaries.

Docs follow: the Integrations page in every locale now documents GitHub
(pointing at its own page) and Linear in full, the GitHub page names
Settings → Integrations as the place to connect and covers linking an
issue or PR to a message, and the Providers pages no longer promise Claude
or Cursor subscriptions.

Claude-Session: https://claude.ai/code/session_01HB9wdLQoZX2vfyDjwv6Rso

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

@@ -202,7 +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', 'discord', 'telegram', 'messenger', 'github', 'linear'] },
+  { slug: 'integrations', title: 'Integrations', group: 'general', kind: 'single', keywords: ['integration', 'connect', 'oauth', 'github', 'linear'], isAvailable: (ctx) => !ctx.isVSCode },
 ] as const;
 
 const LEGACY_SIDEBAR_SECTION_TO_SETTINGS_SLUG: Record<SidebarSection, SettingsPageSlug> = {

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

@@ -17,28 +17,6 @@ const runtimeCtx = {
 };
 
 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);
-  });
-
-  test('finds third-party integrations by OpenChamber npm package names', () => {
-    const results = buildSettingsSearchResults({
-      query: '@openchamber/opencode-cursor',
-      runtimeCtx,
-      t,
-      getPageTitle: (page) => page,
-    });
-
-    expect(results.some((result) => result.id === 'integrations.third-party.opencode-cursor-oauth')).toBe(true);
-  });
-
   test('finds Linear connect on the integrations page', () => {
     const results = buildSettingsSearchResults({
       query: 'linear',

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

@@ -1018,26 +1018,6 @@ const SETTINGS_SEARCH_ITEMS: readonly SettingsSearchItem[] = [
     keywords: ['linear', 'project', 'team', 'map', 'workspace', 'directory'],
     isAvailable: (ctx) => !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', '@openchamber/opencode-claude'],
-  },
-  {
-    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', '@openchamber/opencode-cursor'],
-  },
 ] as const;
 
 interface BuildSettingsSearchResultsOptions {