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/Http/Controllers/Pos/TableController.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Http\Controllers\Pos;
+
+use App\Http\Controllers\Controller;
+use App\Http\Controllers\Pos\Concerns\ScopesToAccount;
+use App\Models\PosSale;
+use App\Models\PosTable;
+use App\Services\Pos\PosLocationService;
+use Illuminate\Http\Request;
+use Illuminate\View\View;
+
+class TableController extends Controller
+{
+    use ScopesToAccount;
+
+    public function __construct(private PosLocationService $locations) {}
+
+    public function index(Request $request): View
+    {
+        $owner = $this->ownerRef($request);
+        $location = $this->locations->ensureDefault($owner);
+
+        $tables = PosTable::owned($owner)
+            ->with('currentSale')
+            ->orderBy('area')
+            ->orderBy('position')
+            ->orderBy('label')
+            ->get();
+
+        $openTickets = PosSale::owned($owner)
+            ->openTickets()
+            ->with('table')
+            ->withCount('lines')
+            ->latest('opened_at')
+            ->get();
+
+        return view('pos.floor', [
+            'location' => $location,
+            'tables' => $tables,
+            'tablesByArea' => $tables->groupBy(fn (PosTable $t) => $t->area ?: 'Floor'),
+            'openTickets' => $openTickets,
+        ]);
+    }
+}