feat: Implement pull-to-refresh functionality on the agent detail screen by adding a refresh method to the provider and integrating a RefreshIndicator.

lib/features/agents/presentation/providers/agent_detail_provider.dart

@@ -399,6 +399,24 @@ class AgentDetailNotifier extends StateNotifier<AgentDetailState> {
     }
   }
 
+  Future<void> refresh() async {
+    try {
+      final results = await Future.wait([
+        _repo.getAgentById(agentId),
+        _repo.getFieldValues(agentId),
+        _repo.getTestimonials(agentId),
+      ]);
+      state = state.copyWith(
+        agent: results[0] as AgentProfile,
+        fieldValues: results[1] as List<AgentFieldValue>,
+        testimonials: results[2] as List<Map<String, dynamic>>,
+        isLoading: false,
+      );
+      // Also refresh connection status
+      await loadConnectionStatus();
+    } catch (_) {}
+  }
+
   Future<void> loadConnectionStatus() async {
     final status = await _repo.getConnectionStatus(agentId);
     state = state.copyWith(connectionStatus: status);