fix: retry file explorer init when client reconnects after page refresh (#442)

hasInitializedRef was set to true before confirming the directory
listing request actually succeeded. On page refresh the WebSocket
client is still reconnecting, so requestDirectoryListing returned
early with "Host is not connected" and the ref stayed true —
preventing any retry once the client became available.

Fix: make requestDirectoryListing return Promise<boolean> and reset
hasInitializedRef on failure so the init effect re-runs automatically
when requestDirectoryListing is recreated after the client reconnects.

Fixes #441

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/app/src/hooks/use-file-explorer-actions.ts

@@ -82,9 +82,12 @@ export function useFileExplorerActions(params: { serverId: string } & FileExplor
   );
 
   const requestDirectoryListing = useCallback(
-    async (path: string, options?: { recordHistory?: boolean; setCurrentPath?: boolean }) => {
+    async (
+      path: string,
+      options?: { recordHistory?: boolean; setCurrentPath?: boolean },
+    ): Promise<boolean> => {
       if (!workspaceStateKey) {
-        return;
+        return false;
       }
       const normalizedPath = path && path.length > 0 ? path : ".";
       const shouldSetCurrentPath = options?.setCurrentPath ?? true;
@@ -113,7 +116,7 @@ export function useFileExplorerActions(params: { serverId: string } & FileExplor
           lastError: "Workspace is unavailable",
           pendingRequest: null,
         }));
-        return;
+        return false;
       }
 
       if (!client) {
@@ -123,7 +126,7 @@ export function useFileExplorerActions(params: { serverId: string } & FileExplor
           lastError: "Host is not connected",
           pendingRequest: null,
         }));
-        return;
+        return false;
       }
 
       try {
@@ -150,6 +153,7 @@ export function useFileExplorerActions(params: { serverId: string } & FileExplor
 
           return nextState;
         });
+        return true;
       } catch (error) {
         updateExplorerState((state) => ({
           ...state,
@@ -157,6 +161,7 @@ export function useFileExplorerActions(params: { serverId: string } & FileExplor
           lastError: error instanceof Error ? error.message : "Failed to list directory",
           pendingRequest: null,
         }));
+        return false;
       }
     },
     [client, normalizedWorkspaceRoot, updateExplorerState, workspaceStateKey],