feat(admin): cleanup page — remove 'Fichiers temporaires' level, promote sections to h2 TOC entries

docs/development.md

@@ -185,6 +185,8 @@ just backup         # SQL dump into app/storage/backup_<timestamp>.sql
 just backup-snapshot # WAL-safe hot backup + gzip into storage/backups/
 just cleanup-drafts [--no-dry-run]   # remove orphaned drafts > 7 days (default)
                                      # OLDER_THAN_HOURS=24 to change the threshold
+just cleanup-tmp-uploads [--no-dry-run]  # GC abandoned FilePond uploads (>2h or missing session)
+                                     # TMP_UPLOAD_MAX_AGE_SECONDS to change the threshold
 ```
 
 See [database.md](database.md) for the full schema reference.