[Omni] Fix popup Snap watermark response handling

.omni/e42f8a19-untitled/memory.md

@@ -18,6 +18,7 @@
 ## Key Discoveries
 
 - Selection capture is coordinated in `src/background/service-worker.ts`: popup sends `CAPTURE_SCREENSHOT`, service worker injects the selection overlay, then receives `SELECTION_COMPLETE` and crops via the offscreen document.
+- Popup runtime message listeners must ignore unrelated messages synchronously; an async listener can interfere with offscreen `ADD_WATERMARK` responses while the popup is open.
 
 ---
-_Last system refresh: 2026-05-06 06:33 UTC_
+_Last system refresh: 2026-05-06 07:09 UTC_

src/popup/popup.tsx

@@ -25,7 +25,7 @@
 /**
  * Main Popup Component
  */
 function PopupApp() {
   const [isAuthenticated, setIsAuthenticated] = useState(false);
   const [isLoading, setIsLoading] = useState(true);
   const [assets, setAssets] = useState<Asset[]>([]);
@@ -40,7 +40,7 @@
 
   useEffect(() => {
     loadInitialData();
   }, []);
 
   async function loadInitialData() {
     setIsLoading(true);
@@ -271,8 +271,12 @@
 
   // Listen for upload progress updates
   useEffect(() => {
-    const handleMessage = async (message: any) => {
-      if (message.type === 'UPLOAD_PROGRESS') {
+    const handleMessage = (message: any) => {
+      if (message.type !== 'UPLOAD_PROGRESS') {
+        return false;
+      }
+
+      void (async () => {
         const payload = message.payload;
 
         // Reload assets to show updated progress
@@ -291,12 +295,14 @@
             metadata: { nid: payload.nid },
           } as any);
         }
-      }
+      })();
+
+      return false;
     };
 
     chrome.runtime.onMessage.addListener(handleMessage);
     return () => chrome.runtime.onMessage.removeListener(handleMessage);
   }, [showInsufficientCreditsNotification, huntMode.enabled]); // Add huntMode dependency
 
   if (isLoading) {
     return (