fix: prevent duplicate queue entries after removeFromQueueOnDone

- Track completed uploads in _completedUploadKeys Set so buildQueuePreview
  won't re-create jobs for files already uploaded this session
- Deduplicate queue on restore: when loading pendingQueue, keep only the
  job with the best status per file+hoster pair (removes existing dupes)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

renderer/app.js

@@ -34,6 +34,7 @@ let _sessionTotalBytes = 0; // Total bytes ever added to queue this session
 let _sessionUploadedBytes = 0; // Bytes fully uploaded this session (done jobs)
 let _sessionTrackedJobs = new Set(); // Job IDs already counted for totalBytes
 let _sessionDoneJobs = new Set(); // Job IDs already counted for uploadedBytes
+let _completedUploadKeys = new Set(); // 'filepath|hoster' keys for done uploads (survives removeFromQueueOnDone)
 let queueSortState = { key: 'filename', direction: 'asc' };
 
 // History state
@@ -371,7 +372,7 @@ function restoreQueueStateFromConfig() {
       .map(file => ({ path: file.path, name: file.name || file.path.split(/[\\/]/).pop(), size: file.size || 0 }))
     : [];
 
-  queueJobs = Array.isArray(pending.queueJobs)
+  const rawJobs = Array.isArray(pending.queueJobs)
     ? pending.queueJobs
       .filter(job => job && job.fileName && job.hoster)
       .map(job => ({
@@ -394,6 +395,18 @@ function restoreQueueStateFromConfig() {
         progress: job.status === 'done' ? 1 : 0
       }))
     : [];
+
+  // Deduplicate: keep the job with the best status for each file+hoster pair
+  const seen = new Map();
+  const statusPriority = { done: 0, uploading: 1, queued: 2, preview: 3, error: 4, aborted: 5, skipped: 6 };
+  for (const job of rawJobs) {
+    const key = `${job.file}|${job.hoster}`;
+    const existing = seen.get(key);
+    if (!existing || (statusPriority[job.status] ?? 9) < (statusPriority[existing.status] ?? 9)) {
+      seen.set(key, job);
+    }
+  }
+  queueJobs = Array.from(seen.values());
 }
 
 function buildPersistedQueueState() {
@@ -647,7 +660,7 @@ function buildQueuePreview() {
   for (const file of selectedFiles) {
     for (const hoster of hosters) {
       const key = `${file.path}|${hoster}`;
-      if (!existingKeys.has(key)) {
+      if (!existingKeys.has(key) && !_completedUploadKeys.has(key)) {
         const job = {
           id: `preview-${Date.now()}-${Math.random().toString(36).slice(2, 8)}`,
           file: file.path, fileName: file.name, hoster,
@@ -1429,6 +1442,11 @@ function handleProgress(data) {
     _sessionDoneJobs.add(job.id);
   }
 
+  // Track completed uploads so they don't get re-queued after removal
+  if (job.status === 'done') {
+    _completedUploadKeys.add(`${job.file}|${job.hoster}`);
+  }
+
   // Remove finished jobs from queue immediately if setting is enabled
   if (job.status === 'done' && config.globalSettings && config.globalSettings.removeFromQueueOnDone) {
     removeJobFromIndex(job);