fix(notifications): show thumbnail image in overlay mined-card notificat

- Share generated notification icon between overlay and system notification paths
- Add `image` field to OverlayNotificationPayload; render as IMG with has-image layout
- Widen overlay stack to 420px; enlarge card padding and min-height for image variant
- Show OSD message after successful anilist retry when attempt key already handled

src/main/runtime/anilist-post-watch.ts

@@ -194,8 +194,11 @@ export function createMaybeRunAnilistPostWatchUpdateHandler(deps: {
         return;
       }
 
-      await deps.processNextAnilistRetryUpdate();
+      const retryResult = await deps.processNextAnilistRetryUpdate();
       if (deps.hasAttemptedUpdateKey(attemptKey)) {
+        if (retryResult.ok) {
+          deps.showMpvOsd(retryResult.message);
+        }
         return;
       }