feat(FN-1529): implement search query propagation to remote node data

- Add search query propagation so remote nodes receive and use query filters
- Update api-node.ts to accept and forward search query parameters
- Add useRemoteNodeData query key dependency for proper re-fetching on filter changes
- Add api-node.test.ts with tests for search query propagation
- Add comprehensive tests for App component including remote data filtering
- Document search query propagation pitfall in .fusion/memory.md

packages/dashboard/app/api-node.ts

@@ -25,8 +25,16 @@ export async function fetchRemoteNodeProjects(nodeId: string): Promise<ProjectIn
 }
 
 /** Fetch tasks from a specific project on a remote node */
-export async function fetchRemoteNodeTasks(nodeId: string, projectId: string): Promise<Task[]> {
-  return proxyApi<Task[]>(`/tasks?projectId=${encodeURIComponent(projectId)}`, { nodeId });
+export async function fetchRemoteNodeTasks(
+  nodeId: string,
+  projectId: string,
+  searchQuery?: string,
+): Promise<Task[]> {
+  const params = new URLSearchParams({ projectId });
+  if (searchQuery && searchQuery.trim()) {
+    params.set("q", searchQuery.trim());
+  }
+  return proxyApi<Task[]>(`/tasks?${params.toString()}`, { nodeId });
 }
 
 /** Fetch project health from a remote node */