🐛 fix: re-uploading same file after deleting completed job was blocked

_completedUploadKeys tracked done uploads to prevent phantom preview
jobs when removeFromQueueOnDone auto-removes them. But when user
EXPLICITLY deleted a completed job from queue, the key remained —
silently blocking re-upload of the same file+hoster combination.

Now clears the completed key in removeJobFromIndex so deleted files
can be re-added. Safe with removeFromQueueOnDone because
syncSelectedFilesFromQueue runs before next buildQueuePreview.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

renderer/app.js

@@ -715,6 +715,8 @@ function removeJobFromIndex(job) {
   // Track deletion so handleProgress() won't re-create this job from stale callbacks
   _deletedJobIds.add(job.id);
   if (job.uploadId) _deletedJobIds.add(job.uploadId);
+  // Allow re-uploading same file+hoster after deletion
+  if (job.file && job.hoster) _completedUploadKeys.delete(`${job.file}|${job.hoster}`);
 }
 
 // --- Queue Table Rendering (debounced with virtual scrolling) ---