fix: sync canvas placeholder with chat loading

components/canvas/CanvasChatPanel.tsx

@@ -8371,8 +8371,35 @@ export function CanvasChatPanel({
     streamImageGenerationState?.sameModelRunningCount;
   const loadingConcurrencyLimit = streamImageGenerationState?.concurrencyLimit;
   const loadingEstimatedWaitMs = streamImageGenerationState?.estimatedWaitMs;
+  const canvasGenerationPlaceholderState =
+    useMemo<ImageGenerationStatusStreamPayload | null>(() => {
+      if (!shouldShowImageLoading) return null;
+      if (streamImageGenerationState) return streamImageGenerationState;
+
+      return {
+        phase: loadingPhase,
+        providerType: loadingProviderType,
+        modelName: loadingModelName,
+        imageCount: loadingImageCount,
+        queuePosition: loadingQueuePosition,
+        sameModelRunningCount: loadingSameModelRunningCount,
+        concurrencyLimit: loadingConcurrencyLimit,
+        estimatedWaitMs: loadingEstimatedWaitMs,
+      };
+    }, [
+      loadingConcurrencyLimit,
+      loadingEstimatedWaitMs,
+      loadingImageCount,
+      loadingModelName,
+      loadingPhase,
+      loadingProviderType,
+      loadingQueuePosition,
+      loadingSameModelRunningCount,
+      shouldShowImageLoading,
+      streamImageGenerationState,
+    ]);
   useEffect(() => {
-    const streamState = streamImageGenerationStateByChatId[activeChatId] || null;
+    const streamState = canvasGenerationPlaceholderState;
     const placeholderId = canvasGenerationPlaceholderByChatIdRef.current[activeChatId];
 
     if (!streamState) {
@@ -8504,10 +8531,10 @@ export function CanvasChatPanel({
     currentModel?.displayName,
     currentModel?.providerType,
     imageParams,
+    canvasGenerationPlaceholderState,
     focusCanvasOnNode,
     removeCanvasGenerationPlaceholders,
     selectNodes,
-    streamImageGenerationStateByChatId,
     updateNode,
   ]);
   const renderableVisibleMessages = useMemo(() => {