feat: shop UX polish — password reset / order email / multi-image / customer admin

Shop password reset:
- Configured 'shop_customers' password broker on the existing
  password_reset_tokens table
- ShopCustomer::sendPasswordResetNotification overrides Laravel default to
  send a ShopPasswordResetMail with a tenant-subdomain reset URL
- Routes /shop/password/forgot, /shop/password/email, /shop/password/reset/{token}
  + ShopAuthController showForgotPassword/sendResetLink/showResetPassword/
  resetPassword. Forgot view stays generic ("if it exists, we sent…") to avoid
  email enumeration. Login view links to "Am uitat parola".

Order confirmation email:
- ShopOrderConfirmationMail + nicely formatted HTML email template
- ShopOrderNotifier::placed now also emails customer_email (best-effort,
  warning-only logged on failure) alongside existing Telegram + staff push

Multiple images per Part:
- Part media collection switched from singleFile to multiple (max 8 in form)
- imageUrls() helper for galleries; imageUrl() still returns first for cards
- PartResource form: reorderable multi-upload
- Shop part detail: vertical thumbnails switch the main image via vanilla JS

ShopCustomerResource (tenant Filament, "Magazin" nav group):
- List with name/phone/email/client_id/orders_count/last_login_at
- Edit (no password field exposed)
- "Trimite reset parolă" action uses the new broker
- OrdersRelationManager shows the customer's orders read-only

Tests (7 new):
- forgot sends mail; forgot doesn't disclose unknown email; reset with valid
  token changes password; bad token rejected; order email when customer_email
  set; email skipped without it; Part has imageUrls() collection

Full suite: 130 passed.

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

app/Mail/ShopOrderConfirmationMail.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\Central\Company;
+use App\Models\Tenant\OnlineOrder;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class ShopOrderConfirmationMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(
+        public OnlineOrder $order,
+        public Company $company,
+    ) {}
+
+    public function envelope(): Envelope
+    {
+        $brand = $this->company->display_name ?? $this->company->name;
+        return new Envelope(
+            subject: "Comanda #{$this->order->number} primită — {$brand}",
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.shop.order-confirmation',
+            with: [
+                'order' => $this->order,
+                'company' => $this->company,
+                'items' => $this->order->items()->get(),
+                'trackingUrl' => $this->order->trackingUrl(),
+                'currency' => $this->company->settings['currency'] ?? 'MDL',
+            ],
+        );
+    }
+}

app/Mail/ShopPasswordResetMail.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace App\Mail;
+
+use App\Models\Central\Company;
+use App\Models\Tenant\ShopCustomer;
+use Illuminate\Bus\Queueable;
+use Illuminate\Mail\Mailable;
+use Illuminate\Mail\Mailables\Content;
+use Illuminate\Mail\Mailables\Envelope;
+use Illuminate\Queue\SerializesModels;
+
+class ShopPasswordResetMail extends Mailable
+{
+    use Queueable, SerializesModels;
+
+    public function __construct(
+        public ShopCustomer $customer,
+        public Company $company,
+        public string $resetUrl,
+    ) {}
+
+    public function envelope(): Envelope
+    {
+        $brand = $this->company->display_name ?? $this->company->name;
+        return new Envelope(
+            subject: "Resetare parolă — {$brand}",
+        );
+    }
+
+    public function content(): Content
+    {
+        return new Content(
+            view: 'emails.shop.password-reset',
+            with: [
+                'customer' => $this->customer,
+                'company' => $this->company,
+                'resetUrl' => $this->resetUrl,
+            ],
+        );
+    }
+}