Fix Shopify video preview propagation on save

Updates logic to detect processing state (including READY-but-no-sources race condition) and propagates contentUrl updates to the frontend immediately.

src/MediaManager.html

@@ -464,7 +464,7 @@
         style="display:none; background-color:#fffbeb; color:#92400e; padding:12px; border-radius:8px; margin: 0 16px 12px 16px; font-size:13px; border:1px solid #fcd34d; align-items:flex-start; gap:8px;">
         <span style="font-size:16px; line-height:1;">⏳</span>
         <div>
-          Some videos are still being transcoded by Drive. The video preview might not work yet, but they can still be saved,
+          Some videos are still being processed. The video preview might not work yet, but they can still be saved,
           reordered, or deleted.
         </div>
       </div>
@@ -1516,6 +1516,8 @@
                       console.log("[MediaManager] Processing complete for " + item.filename);
                       item.isProcessing = false;
                       item.thumbnail = newItem.thumbnail;
+                      item.contentUrl = newItem.contentUrl; // Propagate URL
+                      item.source = newItem.source;         // Propagate source update (synced)
                       changed = true;
                     }
                   }

src/services/MediaService.test.ts

@@ -304,4 +304,29 @@ describe("MediaService Robust Sync", () => {
       expect(item.isProcessing).toBe(true)
       expect(item.thumbnail).toContain("data:image/svg+xml;base64")
   })
+
+  test("Processing: Marks item as processing if Shopify status is PROCESSING", () => {
+    const folder = driveService.getOrCreateFolder("SKU_SHOP_PROCESS", "root")
+
+    // Drive File
+    const blob = { getName: () => "vid.mp4", getBytes: () => [], getMimeType: () => "video/mp4", getThumbnail: () => ({ getBytes: () => [] }) } as any
+    const f = driveService.saveFile(blob, folder.getId())
+    driveService.updateFileProperties(f.getId(), { shopify_media_id: "gid://shopify/Media/Proc1" })
+
+    // Shopify Media (Processing)
+    shopifyService.getProductMedia = jest.fn().mockReturnValue([
+        {
+            id: "gid://shopify/Media/Proc1",
+            filename: "vid.mp4",
+            mediaContentType: "VIDEO",
+            status: "PROCESSING",
+            preview: { image: { originalSrc: null } } // Preview might be missing during processing
+        }
+    ])
+
+    const state = mediaService.getUnifiedMediaState("SKU_SHOP_PROCESS", "pid")
+    const item = state.find(s => s.id === f.getId())
+
+    expect(item.isProcessing).toBe(true)
+  })
 })

src/services/MediaService.ts

@@ -106,6 +106,8 @@ export class MediaService {
             if (props['custom_thumbnail_id']) customThumbnailId = props['custom_thumbnail_id'];
             if (props['parent_video_id']) parentVideoId = props['parent_video_id'];
 
+            console.log(`[DEBUG] File ${f.getName()} Props:`, JSON.stringify(props));
+
         } catch (e) {
             console.warn(`Failed to get properties for ${f.getName()}`)
         }
@@ -239,6 +241,21 @@ export class MediaService {
                  console.log(`[MediaService] Using Sidecar Thumbnail for ${d.file.getName()}`);
                  thumbnail = sidecarThumbMap.get(d.file.getId()) || "";
                  isProcessing = true; // SHOW HOURGLASS (Request #3)
+             } else if (match && (
+                 match.status === 'PROCESSING' ||
+                 match.status === 'UPLOADED' ||
+                 (match.mediaContentType === 'VIDEO' && (!match.sources || match.sources.length === 0) && match.status !== 'FAILED')
+             )) {
+                 // Shopify Processing (Explicit Status OR Ready-but-missing-sources)
+                 console.log(`[MediaService] Shopify Media is Processing: ${d.file.getName()} (Status: ${match.status}, Sources: ${match.sources ? match.sources.length : 0})`);
+                 isProcessing = true;
+                 // Use Drive thumb as fallback if Shopify preview not ready
+                 if (!thumbnail) {
+                      try {
+                        const nativeThumb = `data:image/jpeg;base64,${Utilities.base64Encode(d.file.getThumbnail().getBytes())}`;
+                        if (nativeThumb.length > 100) thumbnail = nativeThumb;
+                      } catch(e) {}
+                 }
              } else {
                  // 2. Native / Fallback
                  try {

src/services/ShopifyMediaService.ts

@@ -73,6 +73,7 @@ export class ShopifyMediaService implements IShopifyMediaService {
                 id
                 alt
                 mediaContentType
+                status
                 preview {
                   image {
                     originalSrc