Implementare completa U5 din plan-treapta2.md (sectiunea 13):
- _upload.html: drop zone + buton accesibil (a11y: drag nu e la tastatura),
drag-and-drop JS, mesaj 'NU se trimite nimic pana confirmi',
selector foi pt multi-sheet xlsx, stari eroare/mesaj
- _mapcoloane.html: formular mapare coloane cu .maprow/.mapcol.grow,
sugestii fuzzy pre-selectate, etiichete <label> vizibile, sample values,
format data configurabil
- _preview_import.html: tabel 6 stari, pills rezumat, filtre pe stare,
.chk per-rand pe needs_review (D11), banner declarant .banner.warn
direct deasupra input-ului N (D12), bara confirmare sticky,
text 'dubla cu randul N' pe duplicate_in_file (D10 daltonism),
link export CSV randuri esuate
- base.html: .s-needs_review (warn), .s-already_sent/.s-duplicate_in_file
(muted), .drop-zone, .banner.warn, .sticky-bar, .htmx-indicator
- routes.py: rute /_import/upload/mapare-coloane/preview/reset/confirma;
helper _web_compute_preview refoloseste _resolve_row_for_preview,
_already_sent_lookup, _signature din import_router (fara a-l edita);
commit ON CONFLICT DO NOTHING (TOCTOU); log atestare
- tests/test_import_ui.py: 15 teste (dashboard, upload, mapare, preview,
confirmare N corect/gresit, reset, erori, multi-sheet, a11y D10/D11/D12)
279 teste total, 0 esecuri.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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