feat: prevent concurrent query submissions in useGeminiStream hook

packages/cli/src/ui/hooks/useGeminiStream.ts

@@ -97,6 +97,7 @@ export const useGeminiStream = (
   const [initError, setInitError] = useState<string | null>(null);
   const abortControllerRef = useRef<AbortController | null>(null);
   const turnCancelledRef = useRef(false);
+  const isSubmittingQueryRef = useRef(false);
   const [isResponding, setIsResponding] = useState<boolean>(false);
   const [thought, setThought] = useState<ThoughtSummary | null>(null);
   const [pendingHistoryItemRef, setPendingHistoryItem] =
@@ -622,6 +623,11 @@ export const useGeminiStream = (
       options?: { isContinuation: boolean },
       prompt_id?: string,
     ) => {
+      // Prevent concurrent executions of submitQuery
+      if (isSubmittingQueryRef.current) {
+        return;
+      }
+
       if (
         (streamingState === StreamingState.Responding ||
           streamingState === StreamingState.WaitingForConfirmation) &&
@@ -629,6 +635,9 @@ export const useGeminiStream = (
       )
         return;
 
+      // Set the flag to indicate we're now executing
+      isSubmittingQueryRef.current = true;
+
       const userMessageTimestamp = Date.now();
 
       // Reset quota error flag when starting a new query (not a continuation)
@@ -653,6 +662,7 @@ export const useGeminiStream = (
       );
 
       if (!shouldProceed || queryToSend === null) {
+        isSubmittingQueryRef.current = false;
         return;
       }
 
@@ -677,6 +687,7 @@ export const useGeminiStream = (
         );
 
         if (processingStatus === StreamProcessingStatus.UserCancelled) {
+          isSubmittingQueryRef.current = false;
           return;
         }
 
@@ -708,6 +719,7 @@ export const useGeminiStream = (
         }
       } finally {
         setIsResponding(false);
+        isSubmittingQueryRef.current = false;
       }
     },
     [