- Change importSingleDocument return type from boolean to Optional<String>
so callers in processRows receive the skip reason on every non-success path.
S3 upload failures now surface as "S3_UPLOAD_FAILED" and already-imported
documents as "ALREADY_EXISTS" in the skippedFiles list shown in the admin UI.
- Add two new tests: runImportAsync_addsS3UploadFailed_toSkippedFiles and
runImportAsync_addsAlreadyExists_toSkippedFiles; update
importSingleDocument_skips_whenDocumentAlreadyUploadedNotPlaceholder and
the S3-failure test to assert on the Optional return value.
- Add i18n keys for S3_UPLOAD_FAILED and ALREADY_EXISTS in de/en/es messages.
- Svelte ImportStatusCard: add aria-hidden="true" to SVG chevron, wrap
conditional warning section in aria-live="polite" div, add max-h-64
overflow-y-auto to skipped-files <ul> to cap height on large batches.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
a3fc838855