feat(integrations): add Discord/Telegram Coming soon placeholders

Show greyed non-interactive messenger cards with a Coming soon badge
(matching integration card chrome, no expandable controls), and refresh
third-party statuses immediately after Apply & Restart clears pending
plugin restarts.

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

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

@@ -27,4 +27,15 @@ describe('settings search', () => {
 
     expect(results.some((result) => result.id === 'integrations.third-party.opencode-claude')).toBe(true);
   });
+
+  test('finds coming-soon messenger placeholders', () => {
+    const results = buildSettingsSearchResults({
+      query: 'discord',
+      runtimeCtx,
+      t,
+      getPageTitle: (page) => page,
+    });
+
+    expect(results.some((result) => result.id === 'integrations.messengers.discord')).toBe(true);
+  });
 });