避免空入参接口调用

Author: lhy

src/PawSQLSidebarProvider.ts

@@ -350,7 +350,12 @@ export class PawSQLTreeProvider
     try {
       // Reset all validation states first
       this.isConfigValid = false;
-
+      if (!backendUrl || !frontendUrl || !apiKey) {
+        this.isConfigValid = false;
+        vscode.commands.executeCommand("setContext", "isConfigured", false);
+        this.workspaces = [];
+        return;
+      }
       const backendResult = await validateBackend(backendUrl ?? "");
 
       const isBackendConnected = backendResult.isAvailable;