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/part.blade.php

@@ -0,0 +1,49 @@
+@extends('shop.layout')
+@section('title', $part->name)
+@section('content')
+@php $currency = $tenant->settings['currency'] ?? 'MDL'; $stock = (float) $part->qty; @endphp
+
+<a href="/shop" class="muted">← Înapoi la catalog</a>
+
+<div class="card" style="margin-top:12px;">
+    <h1 style="font-size:22px;margin-bottom:8px;">{{ $part->name }}</h1>
+    <div class="muted" style="margin-bottom:14px;">
+        {{ $part->brand ? 'Brand: ' . $part->brand : '' }}
+        {{ $part->article ? ' · Cod: ' . $part->article : '' }}
+        {{ $part->category ? ' · ' . $part->category : '' }}
+    </div>
+
+    <div class="stock {{ $stock > 0 ? 'in' : 'out' }}" style="margin-bottom:8px;">
+        {{ $stock > 0 ? '● În stoc (' . rtrim(rtrim(number_format($stock, 2), '0'), '.') . ' ' . ($part->unit ?? 'buc') . ')' : '○ La comandă' }}
+    </div>
+    <div style="font-size:26px;font-weight:700;color:{{ $tenant->settings['theme_color'] ?? '#3B82F6' }};margin-bottom:16px;">
+        {{ number_format((float) $part->sell_price, 2) }} {{ $currency }}
+    </div>
+
+    <form method="POST" action="/shop/part/{{ $part->id }}/add" style="display:flex;gap:8px;align-items:center;max-width:320px;">
+        @csrf
+        <input type="number" name="qty" value="1" min="1" style="width:80px;padding:10px;border:1px solid #d1d5db;border-radius:8px;">
+        <button class="btn" type="submit">Adaugă în coș</button>
+    </form>
+
+    @if ($part->crossRefs->isNotEmpty())
+        <div style="margin-top:20px;">
+            <h3 style="font-size:14px;margin-bottom:6px;">Coduri echivalente (cross)</h3>
+            <div class="muted">
+                @foreach ($part->crossRefs as $cr)
+                    <span style="display:inline-block;background:#f3f4f6;border-radius:6px;padding:3px 8px;margin:2px;">
+                        {{ $cr->cross_article }}{{ $cr->brand ? ' (' . $cr->brand . ')' : '' }}
+                    </span>
+                @endforeach
+            </div>
+        </div>
+    @endif
+
+    @if ($part->notes)
+        <div style="margin-top:20px;">
+            <h3 style="font-size:14px;margin-bottom:6px;">Descriere</h3>
+            <p class="muted" style="white-space:pre-wrap;">{{ $part->notes }}</p>
+        </div>
+    @endif
+</div>
+@endsection