feat: shop customer accounts (register/login + order history)

Schema:
- shop_customers (company_id, name, phone unique-per-tenant, email, password,
  client_id auto-linked, last_login_at)
- online_orders.shop_customer_id nullable FK

Auth:
- New 'shop' guard (session driver, shop_customers provider) in config/auth.php
- ShopCustomer Authenticatable with hashed password cast and BelongsToTenant
  global scope — login attempts naturally scoped to current tenant subdomain

Flow:
- ShopAuthController: register / login / logout / account
- Register auto-links to existing Client by phone match
- /shop/account: order history (only the logged customer's orders) + profile
- Checkout prefills name/phone/email from logged customer + sets
  shop_customer_id (and client_id from auto-link) on the placed order
- Layout nav switches between Login/Register and "👤 Name + Ieșire"

Tests (8 new):
- register creates customer + auto-login
- register auto-links existing Client by phone
- duplicate phone rejected
- login validates credentials
- /account requires auth (redirects to /shop/login)
- /account lists only the logged customer's orders
- checkout attaches shop_customer_id
- customers tenant-isolated

Full suite: 117 passed.

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

app/Http/Controllers/ShopController.php

@@ -155,11 +155,13 @@ class ShopController extends Controller
         if (empty($cart)) return redirect('/shop');
 
         $subtotal = collect($cart)->sum(fn ($i) => $i['price'] * $i['qty']);
+        $customer = \Illuminate\Support\Facades\Auth::guard('shop')->user();
 
         return view('shop.checkout', [
             'tenant' => $tenant,
             'cart' => $cart,
             'subtotal' => $subtotal,
+            'customer' => $customer,
             'deliveryOptions' => (array) data_get($tenant->settings, 'shop.delivery_methods', ['pickup']),
             'cartCount' => $this->cartCount(),
         ]);
@@ -188,9 +190,13 @@ class ShopController extends Controller
             $deliveryFee = ($freeOver > 0 && $subtotal >= $freeOver) ? 0.0 : $fee;
         }
 
-        $order = DB::transaction(function () use ($tenant, $cart, $data, $deliveryFee) {
+        $shopCustomer = \Illuminate\Support\Facades\Auth::guard('shop')->user();
+
+        $order = DB::transaction(function () use ($tenant, $cart, $data, $deliveryFee, $shopCustomer) {
             $order = OnlineOrder::create([
                 'number' => OnlineOrder::generateNumber($tenant->id),
+                'shop_customer_id' => $shopCustomer?->id,
+                'client_id' => $shopCustomer?->client_id,
                 'customer_name' => $data['customer_name'],
                 'customer_phone' => $data['customer_phone'],
                 'customer_email' => $data['customer_email'] ?? null,