Stage 7+14 — Mechanic Board + Scan Center

Mechanic Workflow (Stage 7):
- /app/mechanic Filament page filtered to master_id = auth user
- Kanban 4 columns (in_work / awaiting_parts / ready / recent), each card
  shows WO#, plate, client, complaint summary, photo presence
- 2 KPI tiles (active now / closed today)
- Mobile-responsive grid (auto-fit, minmax 260px)

WarehouseService:
- issueNow(WorkOrderPart) — consume reservations immediately scoped to one
  line, without closing the WO (mechanic physically takes part now)
- returnPart(WorkOrderPart, qty?, notes?) — refund to stock as new batch
  at original buy_price, writes `return` event, capped at consumed total

WO PartsRelationManager:
- "Eliberează" action — visible when active reservation exists
- "Restituire" action — visible when consumed reservation exists, with qty
  modal + notes

Scan Center (Stage 14):
- PartResource "QR" action — per-part SVG QR with payload PART:<article|id>
- BulkAction "Tipărește etichete QR" → /parts/labels?ids=N,M (HTML A4 sheet,
  3-col grid, print CSS hides toolbar)
- /app/scan Filament page using html5-qrcode 2.3.8 (CDN), auto-picks back
  camera, decodes → Livewire dispatches scanner-decoded → resolveAndRedirect
- Lookup matches PART:N prefix, parts.article, parts.barcode, or numeric id
- Manual input fallback for browsers without camera

Tests (6 new):
- WarehouseIssueReturnTest (3): issueNow consumes immediately; returnPart
  creates positive batch + return event; over-return is capped
- ScannerLookupTest (3): PART: prefix lookup, raw barcode lookup, unknown miss

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/Filament/Tenant/Resources/PartResource.php

@@ -135,6 +135,26 @@ class PartResource extends Resource
                     ->query(fn ($q) => $q->where('qty', '<=', 0)),
             ])
             ->actions([
+                Actions\Action::make('qr')
+                    ->label('QR')
+                    ->icon('heroicon-m-qr-code')
+                    ->color('gray')
+                    ->modalHeading(fn (Part $r) => 'QR pentru ' . $r->name)
+                    ->modalSubmitAction(false)
+                    ->modalCancelActionLabel('Închide')
+                    ->modalContent(function (Part $r) {
+                        $payload = 'PART:' . ($r->article ?: $r->id);
+                        $svg = (new \chillerlan\QRCode\QRCode(new \chillerlan\QRCode\QROptions([
+                            'outputType' => \chillerlan\QRCode\QRCode::OUTPUT_MARKUP_SVG,
+                            'eccLevel' => \chillerlan\QRCode\QRCode::ECC_M,
+                            'scale' => 8,
+                            'imageBase64' => false,
+                            'addQuietzone' => true,
+                        ])))->render($payload);
+                        return view('filament.tenant.part-qr', [
+                            'part' => $r, 'svg' => $svg, 'payload' => $payload,
+                        ]);
+                    }),
                 Actions\Action::make('ai_price')
                     ->label('AI: preț recomandat')
                     ->icon('heroicon-m-sparkles')
@@ -186,6 +206,17 @@ class PartResource extends Resource
                 Actions\EditAction::make(),
                 Actions\DeleteAction::make(),
             ])
+            ->bulkActions([
+                Actions\BulkAction::make('print_labels')
+                    ->label('Tipărește etichete QR')
+                    ->icon('heroicon-m-printer')
+                    ->color('gray')
+                    ->action(function ($records) {
+                        $ids = collect($records)->pluck('id')->implode(',');
+                        return redirect()->away('/parts/labels?ids=' . $ids);
+                    })
+                    ->deselectRecordsAfterCompletion(),
+            ])
             ->emptyStateHeading('Depozit gol')
             ->emptyStateDescription('Adaugă piese manual, sau folosește Achiziții ca să le adaugi prin recepție de la furnizor (cu prețuri și stoc auto). Procentaj poate seta automat prețul de vânzare.')
             ->emptyStateIcon('heroicon-o-cube')