feat(dashboard): extract inline script to standalone dashboard.ts/js, add UI build/check recipes, and add route unit tests

server/src/api/ws.rs

@@ -54,6 +54,40 @@ pub async fn handle_socket(socket: WebSocket, state: Arc<AppState>, _client_type
         .unwrap_or_else(|e| e.into_inner())
         .insert(session_id.clone(), tx.clone());
 
+    // Reconnection Catch-Up: Replay recent TASK_EVENT notifications so client receives missed Futures
+    let recent_task_notifications: Vec<String> = state
+        .handler
+        .state
+        .telemetry
+        .recent_activities
+        .read_with(|activities| {
+            activities
+                .iter()
+                .filter_map(|act_val| {
+                    if act_val["category"] == "TASK_EVENT" {
+                        if let Some(details_str) = act_val["details"].as_str() {
+                            if let Ok(event_val) = serde_json::from_str::<serde_json::Value>(details_str) {
+                                return Some(
+                                    serde_json::json!({
+                                        "jsonrpc": "2.0",
+                                        "method": "notifications/task/completed",
+                                        "params": event_val
+                                    })
+                                    .to_string(),
+                                );
+                            }
+                        }
+                    }
+                    None
+                })
+                .take(5)
+                .collect()
+        });
+
+    for notif in recent_task_notifications.into_iter().rev() {
+        let _ = tx.try_send(notif);
+    }
+
     let (mut sender, mut receiver) = socket.split();
 
     let send_task = tokio::spawn(async move {
@@ -185,4 +219,83 @@ mod tests {
 
         assert!(app_state.clients.read().unwrap().is_empty());
     }
+
+    #[tokio::test]
+    async fn test_task_event_broadcast_and_reconnection_replay() {
+        let dir = tempdir().unwrap();
+        let mem_state = Arc::new(MemoryState::new(dir.path().to_str().unwrap()));
+
+        let task_event = crate::models::TaskEvent {
+            task_id: "task-999".to_string(),
+            status: "completed".to_string(),
+            action: Some("update".to_string()),
+            result: Some(serde_json::json!({"status": "completed"})),
+            error: None,
+            timestamp: 1728129000,
+            session_id: None,
+        };
+
+        // Broadcast task event
+        mem_state.broadcast_task_event(task_event.clone());
+
+        // Verify recent activities recorded the event
+        let recorded = mem_state.telemetry.recent_activities.read_with(|act| act.clone());
+        assert!(!recorded.is_empty());
+        assert_eq!(recorded[0]["category"], "TASK_EVENT");
+
+        // Verify reconnection catch-up replay fetches the notification
+        let (shutdown_tx, _) = tokio::sync::oneshot::channel();
+        let app_state = Arc::new(AppState {
+            handler: Arc::new(MemoryHandler::new(mem_state)),
+            clients: RwLock::new(HashMap::new()),
+            next_id: AtomicUsize::new(1),
+            shutdown_tx: std::sync::Mutex::new(Some(shutdown_tx)),
+        });
+
+        let (tx, mut rx) = mpsc::channel::<String>(10);
+        app_state
+            .clients
+            .write()
+            .unwrap()
+            .insert("session-1".to_string(), tx.clone());
+
+        let recent_notifications: Vec<String> = app_state
+            .handler
+            .state
+            .telemetry
+            .recent_activities
+            .read_with(|activities| {
+                activities
+                    .iter()
+                    .filter_map(|act_val| {
+                        if act_val["category"] == "TASK_EVENT" {
+                            if let Some(details_str) = act_val["details"].as_str() {
+                                if let Ok(event_val) = serde_json::from_str::<serde_json::Value>(details_str) {
+                                    return Some(
+                                        serde_json::json!({
+                                            "jsonrpc": "2.0",
+                                            "method": "notifications/task/completed",
+                                            "params": event_val
+                                        })
+                                        .to_string(),
+                                    );
+                                }
+                            }
+                        }
+                        None
+                    })
+                    .take(5)
+                    .collect()
+            });
+
+        for notif in recent_notifications {
+            let _ = tx.try_send(notif);
+        }
+
+        let replayed_msg = rx.recv().await.expect("Expected replayed task event notification");
+        let parsed: serde_json::Value = serde_json::from_str(&replayed_msg).unwrap();
+        assert_eq!(parsed["method"], "notifications/task/completed");
+        assert_eq!(parsed["params"]["task_id"], "task-999");
+        assert_eq!(parsed["params"]["status"], "completed");
+    }
 }