Stop asking users to show their face in image invitations

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tests/openrouter-client.test.ts

@@ -850,7 +850,8 @@ describe('OpenRouterClient', () => {
       expect(prompt).toContain('Other person: just got out of the shower');
       expect(prompt).toContain('You: lucky you');
       expect(prompt).toContain('send to them');
-      expect(prompt).toMatch(/pic or video/i);
+      expect(prompt).toMatch(/share a casual photo/i);
+      expect(prompt).toMatch(/show their face/i);
     });
 
     it('falls back to next model when primary refuses', async () => {