Add restaurant/café mode: floor, open tabs, and kitchen display (Phase 1)

Gated by a per-location service_style (retail | restaurant). Restaurant mode adds:
- Floor screen with tables (areas, seats, status) — tap a free table to open a
  dine-in tab; takeaway/counter orders open from the same screen.
- Open tickets (tabs): a sale stays pending while items are added; lines persist
  as you go (posTicket Alpine component posts each change to the server).
- Send-to-kitchen fires un-sent lines; a polling Kitchen Display (KDS) shows
  active tickets and bumps items queued → preparing → ready → served.
- Settlement reuses the existing cash / Ladill Pay flow; paying closes the tab
  and frees the table (PosSaleService::closeTicket, wired into both pay paths).
- Settings gains the mode toggle and a tables manager.

Schema is additive (new pos_tables; service_style on locations; order/kitchen
columns on sales + lines). Retail flow is untouched. Sidebar surfaces Floor +
Kitchen only in restaurant mode. New PosRestaurantTest covers the dine-in
lifecycle end to end; suite green (10 passed).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

app/Models/PosSale.php

@@ -21,12 +21,29 @@ class PosSale extends Model
 
     public const METHOD_CASH = 'cash';
 
+    public const ORDER_COUNTER = 'counter';
+
+    public const ORDER_DINE_IN = 'dine_in';
+
+    public const ORDER_TAKEAWAY = 'takeaway';
+
+    public const KITCHEN_NONE = 'none';
+
+    public const KITCHEN_ACTIVE = 'active';
+
+    public const KITCHEN_SERVED = 'served';
+
     protected $fillable = [
         'owner_ref',
         'location_id',
+        'table_id',
         'reference',
         'status',
         'payment_method',
+        'order_type',
+        'kitchen_status',
+        'covers',
+        'notes',
         'pay_order_id',
         'payment_reference',
         'customer_name',
@@ -37,6 +54,9 @@ class PosSale extends Model
         'total_minor',
         'currency',
         'paid_at',
+        'opened_at',
+        'kitchen_sent_at',
+        'closed_at',
     ];
 
     protected function casts(): array
@@ -46,7 +66,11 @@ class PosSale extends Model
             'total_minor' => 'integer',
             'pay_order_id' => 'integer',
             'crm_customer_id' => 'integer',
+            'covers' => 'integer',
             'paid_at' => 'datetime',
+            'opened_at' => 'datetime',
+            'kitchen_sent_at' => 'datetime',
+            'closed_at' => 'datetime',
         ];
     }
 
@@ -55,6 +79,26 @@ class PosSale extends Model
         return $this->belongsTo(PosLocation::class, 'location_id');
     }
 
+    public function table(): BelongsTo
+    {
+        return $this->belongsTo(PosTable::class, 'table_id');
+    }
+
+    public function isOpen(): bool
+    {
+        return $this->status === self::STATUS_PENDING;
+    }
+
+    public function isDineIn(): bool
+    {
+        return $this->order_type === self::ORDER_DINE_IN;
+    }
+
+    public function scopeOpenTickets(Builder $query): Builder
+    {
+        return $query->where('status', self::STATUS_PENDING);
+    }
+
     public function lines(): HasMany
     {
         return $this->hasMany(PosSaleLine::class)->orderBy('position');