- Add GET /files/{storage_key:path} endpoint to serve stored files
- Add getFile() method to apiService to fetch files from backend
- Update convertProofToFrontend() to preserve fileStorageKey
- Update handleRetryAnalysis() to fetch file from backend when not in memory
- Update handleDownload() to download original file instead of thumbnail
After page refresh, the retry button now fetches the original file from
backend storage using the fileStorageKey, allowing failed proofs to be
reprocessed. The Download Asset button also now downloads the original
uploaded file rather than the preview thumbnail.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
b119951f93