Hide transient upload errors from queue UI

Transient network errors on first upload attempt showed ugly
'Network error: TypeError: Load failed' messages in the queue.
These are normal on iOS Safari and auto-resolve on retry.

- Clean up sync error messages (friendly text, no raw error types)
- Only show error messages in queue after 3+ retries or failed status
- Only show retry counter after 3+ retries
- First couple of retries are silent - just shows Pending status

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

app/templates/queue.html

@@ -500,7 +500,7 @@ function createQueueItem(photo, isCompleted) {
     badge.textContent = photo.status.charAt(0).toUpperCase() + photo.status.slice(1);
     status.appendChild(badge);
 
-    if (photo.retryCount > 0 && !isCompleted) {
+    if (photo.retryCount >= 3 && !isCompleted) {
         const retry = document.createElement('span');
         retry.className = 'retry-info';
         retry.textContent = 'Retry #' + photo.retryCount;
@@ -511,8 +511,11 @@ function createQueueItem(photo, isCompleted) {
     info.appendChild(meta);
     info.appendChild(status);
 
+    // Only show error messages after 3+ retries or for failed status
+    // (first couple of retries are usually transient network blips)
     const errorMsg = photo.lastError || photo.error;
-    if (errorMsg && photo.status !== 'verified') {
+    const retries = photo.retryCount || 0;
+    if (errorMsg && photo.status !== 'verified' && (retries >= 3 || photo.status === 'failed')) {
         const error = document.createElement('div');
         error.className = 'error-message';
         error.textContent = errorMsg;