feat(data-entry): Bulk Receipt Upload cu Mobile UX Android Nativ

## Funcționalități Principale

### Bulk Upload & Processing
- Drag & drop pentru upload bonuri multiple oriunde pe pagină
- Batch processing cu job queue și worker pool
- Real-time updates via SSE (Server-Sent Events) cu fallback polling
- Duplicate detection via SHA-256 file hash
- Auto-retry pentru job-uri failed
- Cancel individual jobs sau batch complet

### Mobile UX - Android Native Style
- Top bar fixă cu hamburger, titlu centrat, acțiuni (search/filter)
- Bottom navigation cu 4 tab-uri (Bonuri, Upload, Rapoarte, Setări)
- FAB (Floating Action Button) cu hide/show on scroll
- Filter chips orizontal scrollabile
- Selecție multiplă prin long-press (500ms)
- Select All + Bulk Delete cu confirmare
- Layout Android pentru Create/Edit/View bon (Gmail compose style)

### Bug Fixes
- Refresh individual via SSE în loc de refresh total pagină
- Bonurile cu eroare OCR rămân vizibile pentru editare manuală
- Afișare nume fișier original pentru toate bonurile
- Upload stabil pe mobil (fix race condition File API)
- Păstrare ordine bonuri la refresh (nu se reordonează)

### Backend
- SSE endpoint pentru status updates real-time
- Bulk delete endpoint cu partial success
- Auto-cleanup bonuri failed după 7 zile
- Batch model cu tracking complet

### Testing
- E2E tests cu Playwright
- Unit tests pentru bulk upload, auto-create, cleanup

## Commits Squashed: 43 user stories (US-001 → US-043)
## Branch: ralph/bulk-receipt-upload
## Timp dezvoltare: ~3 zile (Ralph autonomous)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.claude/rules/claude-learn-frontend.md

@@ -140,3 +140,20 @@ const getStorageKey = () => {
 @2025-12-24 #vue #watch #reactive | inferred:high
 **P**: Period dropdown stayed on placeholder - handleCompanyChanged() existed but periods never loaded.
 **S**: Add Vue watch() on companyStore.selectedCompany with { immediate: true } to handle both initial load and changes.
+
+## G: Mobile File Input Reset Causes Page Reload/Crash
+@2026-01-10 #mobile #file-upload #async #chrome-android | explicit:high
+**P**: On Chrome Mobile (Android/iOS), selecting multiple files in bulk upload caused page reload before "Process" button could be clicked. Files disappeared.
+**C**: Race condition - `onFilesSelected` called async `handleFiles()` (which clones files with `arrayBuffer()`) but immediately reset `fileInput.value = ''` without waiting. On mobile browsers, resetting input invalidates File object references while `arrayBuffer()` is still reading them.
+**S**: Make event handler async and await `handleFiles()` before resetting input:
+```javascript
+const onFilesSelected = async (event) => {
+  const files = event.target?.files
+  if (files?.length > 0) {
+    await handleFiles(Array.from(files))  // Wait for cloning!
+  }
+  // Reset AFTER handleFiles completes
+  if (fileInput.value) fileInput.value.value = ''
+}
+```
+**Applied in**: `src/modules/data-entry/components/bulk/BulkUploadZone.vue`