Fix NSFW reply refusals and media offers

tests/media-library-exchange.test.ts

@@ -21,6 +21,11 @@ describe('media library request detection', () => {
   it('does not treat an unrelated show-me instruction as an image request', () => {
     expect(detectMediaRequest('show me how this works')).toBeNull();
   });
+
+  it('treats clear acceptance of the bot\'s prior generic media offer as a request', () => {
+    expect(detectMediaRequest('yes please 😏', [], 'Want me to send you a pic?')).toBe('generic');
+    expect(detectMediaRequest('yes please', [], 'Want to hear a joke?')).toBeNull();
+  });
 });
 
 describe('MediaLibraryExchangeService', () => {