Stage 12 — Online Store: public catalog + cart + orders

Schema:
- online_orders (token-tracked, status workflow, delivery method/fee)
- online_order_items (price snapshot, fulfilled flag)
- part_cross_refs (OEM/equivalent codes for search)
- parts.is_published (shop visibility)

Storefront (ShopController, tenant subdomain, /shop):
- Catalog with search across name/article/brand/cross-refs, category +
  in-stock filters, live stock, white-label themed layout
- Part detail page with cross-ref codes
- VIN search → VinDecoder → guided catalog search
- Session cart (per-tenant key), guest checkout, order confirmation page
- Respects settings.shop.enabled (404 when off); tenant-guarded

Part::searchPublished matches cross-ref articles via whereHas.

Order notifications (ShopOrderNotifier, best-effort):
- Staff: Web Push to active users
- Customer: Telegram if phone matches a linked client

Filament (tenant):
- OnlineOrderResource under "Magazin" nav group, status workflow,
  items relation, "Onorează" action issues stock via WarehouseService (FIFO)
- PartResource: is_published toggle + column + bulk publish/unpublish +
  CrossRefsRelationManager
- Settings: shop section (enable, delivery methods, fee, free-over)
- Landing page: shop button when enabled

Tests (6 new):
- catalog 404 when disabled; lists published only; cross-ref search;
  order placement (token + items + total); fulfill issues stock;
  cross-tenant token isolation

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

resources/views/shop/cart.blade.php

@@ -0,0 +1,48 @@
+@extends('shop.layout')
+@section('title', 'Coș')
+@section('content')
+@php $currency = $tenant->settings['currency'] ?? 'MDL'; @endphp
+
+<h1 style="font-size:22px;margin-bottom:16px;">Coșul meu</h1>
+
+@if (empty($cart))
+    <div class="card" style="text-align:center;padding:40px;">
+        <p class="muted">Coșul e gol.</p>
+        <a class="btn" href="/shop" style="margin-top:12px;">Vezi catalogul</a>
+    </div>
+@else
+    <form method="POST" action="/shop/cart/update">
+        @csrf
+        <div class="card">
+            <table class="cart">
+                <thead>
+                    <tr><th>Piesă</th><th class="r">Preț</th><th class="r">Cant.</th><th class="r">Total</th></tr>
+                </thead>
+                <tbody>
+                    @foreach ($cart as $id => $item)
+                        <tr>
+                            <td>
+                                <a href="/shop/part/{{ $item['part_id'] }}">{{ $item['name'] }}</a>
+                                @if (!empty($item['article']))<div class="muted">{{ $item['article'] }}</div>@endif
+                            </td>
+                            <td class="r">{{ number_format($item['price'], 2) }} {{ $currency }}</td>
+                            <td class="r">
+                                <input type="number" name="qty[{{ $id }}]" value="{{ $item['qty'] }}" min="0"
+                                       style="width:64px;padding:6px;border:1px solid #d1d5db;border-radius:6px;text-align:right;">
+                            </td>
+                            <td class="r">{{ number_format($item['price'] * $item['qty'], 2) }} {{ $currency }}</td>
+                        </tr>
+                    @endforeach
+                </tbody>
+            </table>
+        </div>
+        <div style="display:flex;justify-content:space-between;align-items:center;margin-top:16px;flex-wrap:wrap;gap:12px;">
+            <button class="btn outline" type="submit">Actualizează coșul</button>
+            <div style="text-align:right;">
+                <div style="font-size:20px;font-weight:700;">Subtotal: {{ number_format($subtotal, 2) }} {{ $currency }}</div>
+                <a class="btn" href="/shop/checkout" style="margin-top:8px;">Finalizează comanda →</a>
+            </div>
+        </div>
+    </form>
+@endif
+@endsection