feat: inject cookie banner into both Filament panels via renderHook

Adds BODY_END renderHook in TenantPanelProvider and CentralPanelProvider
so the cookie consent banner appears on /app/* and /admin/* pages.
Alpine.js is already bundled by Livewire/Filament — no CDN needed.
Tenant panel uses tenant theme color; central panel uses indigo default.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/Providers/Filament/CentralPanelProvider.php

@@ -86,6 +86,16 @@ class CentralPanelProvider extends PanelProvider
                     </script>
                 HTML
             )
+            ->renderHook(
+                PanelsRenderHook::BODY_END,
+                fn (): string => Blade::render(<<<'BLADE'
+                    @php
+                        $tenant     = null;
+                        $themeColor = '#6366f1';
+                    @endphp
+                    @include('partials.cookie-banner')
+                BLADE)
+            )
             ->middleware([
                 EncryptCookies::class,
                 AddQueuedCookiesToResponse::class,