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>

app/Filament/Tenant/Resources/PartResource.php

@@ -99,6 +99,18 @@ class PartResource extends Resource
                         ->options(fn () => Supplier::pluck('name', 'id'))
                         ->searchable(),
                 ]),
+            Schemas\Components\Section::make('Imagine')
+                ->collapsible()
+                ->schema([
+                    \Filament\Forms\Components\SpatieMediaLibraryFileUpload::make('image')
+                        ->label('Foto piesă')
+                        ->collection('image')
+                        ->image()
+                        ->imageEditor()
+                        ->maxSize(2048)
+                        ->columnSpanFull()
+                        ->helperText('Apare în magazinul online (catalog + pagina piesei). Max 2 MB.'),
+                ]),
             Forms\Components\Textarea::make('notes')->label('Observații')->columnSpanFull()->rows(2),
         ]);
     }
@@ -107,6 +119,11 @@ class PartResource extends Resource
     {
         return $table
             ->columns([
+                \Filament\Tables\Columns\SpatieMediaLibraryImageColumn::make('image')
+                    ->label('')
+                    ->collection('image')
+                    ->circular()
+                    ->size(32),
                 Tables\Columns\TextColumn::make('name')->searchable()->sortable()->wrap(),
                 Tables\Columns\TextColumn::make('article')->label('Cod')->searchable()->copyable()->placeholder('—'),
                 Tables\Columns\TextColumn::make('brand')->placeholder('—'),