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/Providers/AppServiceProvider.php

@@ -2,6 +2,7 @@
 
 namespace App\Providers;
 
+use App\Models\PosLocation;
 use Illuminate\Support\ServiceProvider;
 use App\Support\MobileTopbar;
 use Illuminate\Support\Facades\View;
@@ -18,5 +19,17 @@ class AppServiceProvider extends ServiceProvider
         View::composer(['partials.topbar'], function ($view) {
             $view->with(MobileTopbar::resolve());
         });
+
+        // Expose whether the signed-in account runs in restaurant mode so the
+        // sidebar can surface the Floor + Kitchen nav only when relevant.
+        View::composer('partials.sidebar', function ($view) {
+            $restaurant = false;
+            if ($account = ladill_account()) {
+                $restaurant = PosLocation::owned((string) $account->public_id)
+                    ->where('service_style', PosLocation::STYLE_RESTAURANT)
+                    ->exists();
+            }
+            $view->with('posRestaurant', $restaurant);
+        });
     }
 }