feat: add matchPercentage field to AgentProfile and display match badge in agent search results

lib/features/agents/presentation/screens/agent_search_screen.dart

@@ -528,6 +528,30 @@ class _AgentCardState extends State<_AgentCard> {
                         ),
                       ),
                     ],
+                    // Match badge
+                    if (agent.matchPercentage != null) ...[
+                      const SizedBox(width: 8),
+                      Container(
+                        padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+                        decoration: BoxDecoration(
+                          color: agent.matchPercentage! >= 80
+                              ? const Color(0xFF638559)
+                              : agent.matchPercentage! >= 65
+                                  ? const Color(0xFF7D917D)
+                                  : AppColors.primaryDark.withValues(alpha: 0.6),
+                          borderRadius: BorderRadius.circular(20),
+                        ),
+                        child: Text(
+                          '${agent.matchPercentage}% Match',
+                          style: const TextStyle(
+                            fontFamily: 'SourceSerif4',
+                            fontSize: 12,
+                            fontWeight: FontWeight.w500,
+                            color: Colors.white,
+                          ),
+                        ),
+                      ),
+                    ],
                   ],
                 ),
                 const SizedBox(height: 4),