fix: avoid batch upload storage crash

components/scene-fusion-view.tsx

@@ -54,6 +54,7 @@ const BATCH_REQUEST_STAGGER_MS = 700;
 const BATCH_PARALLEL_WORKER_COUNT = 4;
 const MULTI_PRODUCT_FAILOVER_MAX_ROUNDS = 5;
 const MULTI_PRODUCT_FAILOVER_RETRY_DELAY_MS = 1500;
+const PERSISTED_IMAGE_MAX_LENGTH = 200_000;
 
 const sleep = (ms: number) => new Promise((resolve) => setTimeout(resolve, ms));
 
@@ -104,6 +105,72 @@ type SceneFusionPersistedState = {
   selectedResultIds: string[];
 };
 
+function isPersistableImageValue(value: unknown): value is string {
+  if (typeof value !== "string") return false;
+  const normalized = value.trim();
+  if (!normalized) return false;
+  if (normalized.startsWith("blob:")) return false;
+  if (normalized.startsWith("data:")) return false;
+  return normalized.length <= PERSISTED_IMAGE_MAX_LENGTH;
+}
+
+function toPersistableImageValue(value: unknown) {
+  return isPersistableImageValue(value) ? value.trim() : "";
+}
+
+function toPersistableItems(items: ProcessItem[]) {
+  const persistableItems: ProcessItem[] = [];
+  for (const item of items) {
+    const image = toPersistableImageValue(item.image);
+    const result = toPersistableImageValue(item.result);
+    const originalUrl = toPersistableImageValue(item.originalUrl);
+    if (!image && !result && !originalUrl) continue;
+
+    const persistableItem: ProcessItem = {
+      ...item,
+      image: image || result || originalUrl,
+    };
+    if (result) {
+      persistableItem.result = result;
+    } else {
+      delete persistableItem.result;
+    }
+    if (originalUrl) {
+      persistableItem.originalUrl = originalUrl;
+    } else {
+      delete persistableItem.originalUrl;
+    }
+    persistableItems.push(persistableItem);
+  }
+  return persistableItems;
+}
+
+function createPersistableSnapshot(snapshot: SceneFusionPersistedState): SceneFusionPersistedState {
+  const sceneItems = toPersistableItems(snapshot.sceneItems);
+  const multiProductItems = toPersistableItems(snapshot.multiProductItems);
+  const randomItems = toPersistableItems(snapshot.randomItems);
+  const batchItems = toPersistableItems(snapshot.batchItems);
+  const persistedIds = new Set(
+    [...sceneItems, ...multiProductItems, ...randomItems, ...batchItems].map(
+      (item) => item.id
+    )
+  );
+
+  return {
+    ...snapshot,
+    productImage: toPersistableImageValue(snapshot.productImage) || null,
+    sceneItems,
+    multiProductItems,
+    referenceSceneImage:
+      toPersistableImageValue(snapshot.referenceSceneImage) || null,
+    randomItems,
+    batchItems,
+    selectedResultIds: snapshot.selectedResultIds.filter((id) =>
+      persistedIds.has(id)
+    ),
+  };
+}
+
 const randomBackgroundStyles = [
   "现代简约客厅",
   "北欧卧室",
@@ -539,7 +606,19 @@ export function SceneFusionView({
       selectedResultIds,
     };
 
-    window.sessionStorage.setItem(persistenceKey, JSON.stringify(snapshot));
+    try {
+      window.sessionStorage.setItem(
+        persistenceKey,
+        JSON.stringify(createPersistableSnapshot(snapshot))
+      );
+    } catch (error) {
+      console.warn("[SceneFusionView] Failed to persist state:", error);
+      try {
+        window.sessionStorage.removeItem(persistenceKey);
+      } catch {
+        // Ignore storage cleanup failures.
+      }
+    }
   }, [
     aspectRatio,
     batchItems,