feat: add unlink confirmation dialog, enable agent navigation, update notification read status UI, and increment app version

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

@@ -448,12 +448,61 @@ class _AgentDetailScreenState extends ConsumerState<AgentDetailScreen> {
       return;
     }
     if (state.connectionState == 'accepted') {
-      ref.read(agentDetailProvider(widget.agentId).notifier).cancelConnection();
+      _showUnlinkConfirmation(state);
       return;
     }
     _showConnectModal(state);
   }
 
+  void _showUnlinkConfirmation(AgentDetailState state) {
+    final agentName = state.agent?.fullName ?? 'this agent';
+    showDialog<void>(
+      context: context,
+      builder: (ctx) => AlertDialog(
+        shape: RoundedRectangleBorder(
+          borderRadius: BorderRadius.circular(12),
+        ),
+        title: const Text(
+          'Unlink Agent',
+          style: TextStyle(
+            fontSize: 18,
+            fontWeight: FontWeight.w600,
+            color: Color(0xFF00293d),
+          ),
+        ),
+        content: Text(
+          'Are you sure you want to unlink $agentName? You will need to send a new connection request to reconnect.',
+          style: const TextStyle(fontSize: 14, color: Color(0xFF4B5563)),
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.of(ctx).pop(),
+            child: const Text(
+              'Cancel',
+              style: TextStyle(color: Color(0xFF6B7280)),
+            ),
+          ),
+          ElevatedButton(
+            style: ElevatedButton.styleFrom(
+              backgroundColor: const Color(0xFFE58625),
+              foregroundColor: Colors.white,
+              shape: RoundedRectangleBorder(
+                borderRadius: BorderRadius.circular(8),
+              ),
+            ),
+            onPressed: () {
+              Navigator.of(ctx).pop();
+              ref
+                  .read(agentDetailProvider(widget.agentId).notifier)
+                  .cancelConnection();
+            },
+            child: const Text('Unlink'),
+          ),
+        ],
+      ),
+    );
+  }
+
   void _showConnectModal(AgentDetailState state) {
     final controller = TextEditingController();
     showModalBottomSheet(