H1K0
129cc59793
The import endpoint did all the work in one request and returned only an aggregate summary, so the UI couldn't show progress or per-file status. Refactor FileService.Import to take an optional progress callback and emit a "start" event (with the total entry count), one "file" event per entry as it finishes (index, filename, status, optional reason), and a final "done" event with the tallies. The handler streams these as newline-delimited JSON and flushes after each, deferring the response headers until the first event so a validation error raised before any file is touched is still returned as a normal JSON error. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>