feat(v2/approvals): per-card titles and structured options

Approval cards now carry a required title (Add MCP Request, Install
Packages Request, Rebuild Request, Credentials Request) and structured
options with distinct pre-click label, post-click selectedLabel (e.g.
"✅ Approved" / "❌ Rejected"), and value used for click routing. The
title and normalized options are persisted in pending_questions so the
post-click card edit can render the correct per-type title and selected
label on both chat-sdk channels and Discord interactions.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/db/db-v2.test.ts

@@ -375,11 +375,15 @@ describe('pending questions', () => {
       platform_id: 'chan-1',
       channel_type: 'discord',
       thread_id: null,
+      title: 'Test',
+      options: [{ label: 'Yes', selectedLabel: 'Yes', value: 'yes' }],
       created_at: now(),
     });
     const result = getPendingQuestion('q-1');
     expect(result).toBeDefined();
     expect(result!.session_id).toBe('sess-1');
+    expect(result!.title).toBe('Test');
+    expect(result!.options[0].value).toBe('yes');
   });
 
   it('should delete', () => {
@@ -390,6 +394,8 @@ describe('pending questions', () => {
       platform_id: null,
       channel_type: null,
       thread_id: null,
+      title: 'Test',
+      options: [{ label: 'Yes', selectedLabel: 'Yes', value: 'yes' }],
       created_at: now(),
     });
     deletePendingQuestion('q-1');