diff --git a/ai-hub/app/core/grpc/services/grpc_server.py b/ai-hub/app/core/grpc/services/grpc_server.py
index 28d4dd3..8ad19b2 100644
--- a/ai-hub/app/core/grpc/services/grpc_server.py
+++ b/ai-hub/app/core/grpc/services/grpc_server.py
@@ -281,29 +281,35 @@
                     ]
                     self.journal.fulfill(task_id, {"files": files, "path": fs.manifest.root_path})
                 
-                drifts = self.mirror.reconcile(fs.session_id, fs.manifest)
-                if drifts:
-                    print(f"    [📁🏃] Drift Detected (Node -> Server): Requesting {len(drifts)} files")
-                    # Request node to push these specific files
-                    node.queue.put(agent_pb2.ServerTaskMessage(
-                        file_sync=agent_pb2.FileSyncMessage(
-                            session_id=fs.session_id,
-                            control=agent_pb2.SyncControl(
-                                action=agent_pb2.SyncControl.REFRESH_MANIFEST, 
-                                path=fs.manifest.root_path,
-                                request_paths=drifts
+                # M6: Only reconcile for real user sessions, not for the modular explorer.
+                if fs.session_id != "__fs_explorer__":
+                    drifts = self.mirror.reconcile(fs.session_id, fs.manifest)
+                    if drifts:
+                        print(f"    [📁🏃] Drift Detected (Node -> Server): Requesting {len(drifts)} files")
+                        # Request node to push these specific files
+                        node.queue.put(agent_pb2.ServerTaskMessage(
+                            file_sync=agent_pb2.FileSyncMessage(
+                                session_id=fs.session_id,
+                                control=agent_pb2.SyncControl(
+                                    action=agent_pb2.SyncControl.REFRESH_MANIFEST, 
+                                    path=fs.manifest.root_path,
+                                    request_paths=drifts
+                                )
                             )
-                        )
-                    ))
-                else:
-                    self.registry.emit(node_id, "sync_status", {"message": "Synchronized (Node -> Server)", "code": 0})
+                        ))
+                    else:
+                        self.registry.emit(node_id, "sync_status", {"message": "Synchronized (Node -> Server)", "code": 0})
 
             elif fs.HasField("status"):
                 print(f"    [📁] Sync Status from {node_id}: {fs.status.message}")
                 
-                # M6: Handle interactive write/rm result correlation
-                if task_id and (task_id.startswith("fs-write-") or task_id.startswith("fs-rm-")):
-                    self.journal.fulfill(task_id, {"success": fs.status.code == 0, "message": fs.status.message})
+                # M6: Handle interactive write/rm/ls/cat result correlation from node-side error status
+                if task_id and task_id.startswith("fs-"):
+                    success = fs.status.code == 0
+                    if not success:
+                        self.journal.fulfill(task_id, {"error": fs.status.message})
+                    elif task_id.startswith("fs-write-") or task_id.startswith("fs-rm-"):
+                        self.journal.fulfill(task_id, {"success": True, "message": fs.status.message})
                 
                 self.registry.emit(node_id, "sync_status", {"message": fs.status.message, "code": fs.status.code})
                 if fs.status.code == agent_pb2.SyncStatus.RECONCILE_REQUIRED:
diff --git a/ui/client-app/src/services/apiService.js b/ui/client-app/src/services/apiService.js
index af1f8e8..41e1d17 100644
--- a/ui/client-app/src/services/apiService.js
+++ b/ui/client-app/src/services/apiService.js
@@ -877,7 +877,14 @@
     method: "GET",
     headers: { "X-User-ID": userId },
   });
-  if (!response.ok) throw new Error("Failed to list directory");
+  if (!response.ok) {
+    let detail = "Failed to list directory";
+    try {
+      const errBody = await response.json();
+      detail = errBody.detail || detail;
+    } catch { }
+    throw new Error(detail);
+  }
   return await response.json();
 };