feat: Part product images + seasonal tire-swap reminders

Part (HasMedia):
- Spatie media `image` single-file collection + imageUrl() helper
- PartResource form: image upload section (image editor, 2 MB max)
- Parts list: circular thumbnail column
- Shop catalog cards: square thumbnail + 📦 placeholder
- Shop part detail: 260px image alongside info, single column when no image

Seasonal tire-swap reminders:
- NotificationDispatcher::tireSeasonalSwap(TireSet) — Telegram first, email
  fallback (when set has a vehicle, via ServiceReminderMail with 'tire_swap'
  type and a size-aware note)
- tires:remind-seasonal artisan command, self-gating to Feb 15-Mar 15
  (notify winter sets stored) and Sep 15-Oct 15 (notify summer sets stored).
  60-day cooldown per client via service_reminders_sent. --force / --dry-run.
- Schedule: weekly Mon 09:30

Tests (6 new):
- outside window no-ops; spring window notifies winter; spring ignores summer;
  autumn notifies summer; cooldown blocks doubles; --force overrides window

Full suite: 106 passed.

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

resources/views/shop/part.blade.php

@@ -1,11 +1,19 @@
 @extends('shop.layout')
 @section('title', $part->name)
 @section('content')
-@php $currency = $tenant->settings['currency'] ?? 'MDL'; $stock = (float) $part->qty; @endphp
+@php $currency = $tenant->settings['currency'] ?? 'MDL'; $stock = (float) $part->qty; $img = $part->imageUrl(); @endphp
 
 <a href="/shop" class="muted">← Înapoi la catalog</a>
 
+@if ($img)
+    <div class="card" style="margin-top:12px;display:grid;grid-template-columns:260px 1fr;gap:20px;align-items:start;">
+        <div style="border-radius:10px;overflow:hidden;aspect-ratio:1;background:#f9fafb;border:1px solid #e5e7eb;">
+            <img src="{{ $img }}" alt="{{ $part->name }}" style="width:100%;height:100%;object-fit:cover;display:block;">
+        </div>
+        <div>
+@else
 <div class="card" style="margin-top:12px;">
+@endif
     <h1 style="font-size:22px;margin-bottom:8px;">{{ $part->name }}</h1>
     <div class="muted" style="margin-bottom:14px;">
         {{ $part->brand ? 'Brand: ' . $part->brand : '' }}
@@ -45,5 +53,10 @@
             <p class="muted" style="white-space:pre-wrap;">{{ $part->notes }}</p>
         </div>
     @endif
-</div>
+@if ($img)
+        </div>{{-- /right column --}}
+    </div>{{-- /card grid --}}
+@else
+</div>{{-- /card --}}
+@endif
 @endsection