fix(canvas): 远程媒体 - 统一资源地址并校验视频缓存

web/src/services/project-asset-sync.ts

@@ -12,6 +12,7 @@ import { uploadGeneratedAssetToConfiguredSources } from "@/services/external-ass
 import { getImageBlob, resolveImageUrl, setImageBlob } from "@/services/image-storage";
 import { generationArtifactStorageKey, loadOrStoreGenerationArtifact } from "@/services/generation-artifact-sink";
 import { createProviderNeutralGenerationTaskEffectStore } from "@/services/provider-neutral-generation-effects";
+import { getCachedResourceBlob } from "@/services/resource-blob-cache";
 import { saveRemoteUserDataNow } from "@/services/user-data-sync";
 import { getActiveUserScope } from "@/lib/user-scope";
 import { normalizeAssetCategory } from "@/lib/asset-category";
@@ -265,6 +266,26 @@ async function storedGenerationMedia(dataUrl: string, effectKey: string, mediaTy
     };
 }
 
+async function cachedRemoteGenerationVideo(video: NonNullable<BackendGenerationResult["video"]>, signal?: AbortSignal) {
+    if (!video.storageKey) throw new Error("生成视频缺少云端资源标识");
+    throwIfAborted(signal);
+    const blob = await getCachedResourceBlob(video.storageKey);
+    throwIfAborted(signal);
+    if (!blob) throw new Error("生成视频资源缓存失败，未标记为成功");
+    const url = await resolveMediaUrl(video.storageKey, video.dataUrl);
+    throwIfAborted(signal);
+    if (!url) throw new Error("生成视频资源地址为空，未标记为成功");
+    return {
+        url,
+        storageKey: video.storageKey,
+        width: video.width || 0,
+        height: video.height || 0,
+        durationMs: video.durationMs,
+        bytes: video.bytes || blob.size,
+        mimeType: video.mimeType || blob.type || "video/mp4",
+    };
+}
+
 async function generationOutputAsset(input: Parameters<MaterializeGenerationTaskOutput>[0], scope: string): Promise<NewAsset> {
     throwIfAborted(input.signal);
     const result = generationTaskResult(input.task);
@@ -305,15 +326,7 @@ async function generationOutputAsset(input: Parameters<MaterializeGenerationTask
         const video = result.video;
         if (!video) throw new Error("生成任务缺少视频输出");
         const stored = video.storageKey
-            ? {
-                  url: await resolveMediaUrl(video.storageKey, video.dataUrl),
-                  storageKey: video.storageKey,
-                  width: video.width || 0,
-                  height: video.height || 0,
-                  durationMs: video.durationMs,
-                  bytes: video.bytes || 0,
-                  mimeType: video.mimeType || "video/mp4",
-              }
+            ? await cachedRemoteGenerationVideo(video, input.signal)
             : await storedGenerationMedia(
                   video.dataUrl,
                   input.effectKey,