fix(panel): scan_document_not_kept 按界面语言说明，不再透出后端英文

panel/src/i18n/resources/en-US/errors.json

@@ -67,6 +67,7 @@
   "already_terminal": "This build already finished — there is nothing to cancel.",
   "build_unavailable": "Image builds aren't available right now.",
   "build_logs_unavailable": "Build logs aren't available right now.",
+  "scan_document_not_kept": "This build kept no copy of that scan file: it was too large to keep, or the step that writes it failed.",
   "already_reviewed": "This submission has already been reviewed.",
   "context_changed": "The submitter uploaded the build context again after you reviewed it. Download and review the new upload before approving.",
   "submission_quota_exceeded": "Your submission quota is full: too many pending reviews, or your pending and rejected uploads fill your storage allowance. Withdraw a pending one, or wait: a rejected upload frees its space 7 days after review, and approved ones don't count.",