Logo du site, favicon et contrôle des inscriptions

SiteSettingsService : persistance JSON dans storage/app/site_settings.json
  (pas de migration DB — survit aux mises à jour sans table supplémentaire)

Logo :
- Upload admin (PNG/JPG/SVG/WebP, max 2 Mo) → storage/app/public/site/logo.{ext}
- Favicon <link rel="icon"> injecté dans app.blade.php et guest.blade.php
- Logo affiché dans la barre de navigation (h-8, object-contain)
- Logo affiché sur la page de connexion (guest layout)
- Page d'accueil welcome.blade.php entièrement refaite : logo + bouton connexion
  (remplacement du template Laravel par défaut)
- Suppression du logo possible depuis Admin > Paramètres du site

Inscriptions :
- Désactivées par défaut (registration_enabled=false dans site_settings.json)
- RegisteredUserController : redirige vers /login si inscription désactivée
  (GET /register → redirect + message ; POST /register → abort 403)
- Page d'accueil : bouton "Créer un compte" masqué si inscriptions désactivées
- Admin > Paramètres du site : toggle checkbox pour activer/désactiver

AppServiceProvider : partage $siteLogoUrl et $registrationEnabled avec toutes les vues

Navigation : lien "Paramètres du site" en bas du menu Administration

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

app/Http/Controllers/Admin/SettingController.php

@@ -0,0 +1,61 @@
+<?php
+
+namespace App\Http\Controllers\Admin;
+
+use App\Http\Controllers\Controller;
+use App\Services\SiteSettingsService;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Storage;
+use Illuminate\View\View;
+
+class SettingController extends Controller
+{
+    public function index(): View
+    {
+        return view('admin.parametres.index', [
+            'logoUrl'             => SiteSettingsService::logoUrl(),
+            'registrationEnabled' => SiteSettingsService::registrationEnabled(),
+        ]);
+    }
+
+    public function updateLogo(Request $request): RedirectResponse
+    {
+        $request->validate([
+            'logo' => ['required', 'file', 'max:2048', 'mimes:png,jpg,jpeg,gif,webp,svg'],
+        ]);
+
+        // Supprimer l'ancien logo
+        $old = SiteSettingsService::get('logo_path');
+        if ($old && Storage::disk('public')->exists($old)) {
+            Storage::disk('public')->delete($old);
+        }
+
+        $file = $request->file('logo');
+        $ext  = strtolower($file->getClientOriginalExtension());
+        $path = Storage::disk('public')->putFileAs('site', $file, "logo.{$ext}");
+
+        SiteSettingsService::set('logo_path', $path);
+
+        return back()->with('success', 'Logo mis à jour.');
+    }
+
+    public function deleteLogo(): RedirectResponse
+    {
+        $path = SiteSettingsService::get('logo_path');
+        if ($path && Storage::disk('public')->exists($path)) {
+            Storage::disk('public')->delete($path);
+        }
+
+        SiteSettingsService::set('logo_path', null);
+
+        return back()->with('success', 'Logo supprimé.');
+    }
+
+    public function updateSettings(Request $request): RedirectResponse
+    {
+        SiteSettingsService::set('registration_enabled', $request->boolean('registration_enabled'));
+
+        return back()->with('success', 'Paramètres enregistrés.');
+    }
+}

app/Http/Controllers/Auth/RegisteredUserController.php

@@ -4,9 +4,11 @@ namespace App\Http\Controllers\Auth;
 
 use App\Http\Controllers\Controller;
 use App\Models\User;
+use App\Services\SiteSettingsService;
 use Illuminate\Auth\Events\Registered;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
+use Illuminate\Http\Response;
 use Illuminate\Support\Facades\Auth;
 use Illuminate\Support\Facades\Hash;
 use Illuminate\Validation\Rules;
@@ -18,8 +20,13 @@ class RegisteredUserController extends Controller
     /**
      * Display the registration view.
      */
-    public function create(): View
+    public function create(): View|RedirectResponse
     {
+        if (! SiteSettingsService::registrationEnabled()) {
+            return redirect()->route('login')
+                ->with('status', 'Les inscriptions sont actuellement désactivées.');
+        }
+
         return view('auth.register');
     }
 
@@ -30,6 +37,10 @@ class RegisteredUserController extends Controller
      */
     public function store(Request $request): RedirectResponse
     {
+        if (! SiteSettingsService::registrationEnabled()) {
+            abort(403, 'Les inscriptions sont désactivées.');
+        }
+
         $request->validate([
             'name' => ['required', 'string', 'max:255'],
             'email' => ['required', 'string', 'lowercase', 'email', 'max:255', 'unique:'.User::class],

app/Providers/AppServiceProvider.php

@@ -2,23 +2,21 @@
 
 namespace App\Providers;
 
+use App\Services\SiteSettingsService;
+use Illuminate\Support\Facades\View;
 use Illuminate\Support\ServiceProvider;
 
 class AppServiceProvider extends ServiceProvider
 {
-    /**
-     * Register any application services.
-     */
-    public function register(): void
-    {
-        //
-    }
+    public function register(): void {}
 
-    /**
-     * Bootstrap any application services.
-     */
     public function boot(): void
     {
-        //
+        // Partage le logo et les paramètres globaux avec toutes les vues
+        $logoUrl             = SiteSettingsService::logoUrl();
+        $registrationEnabled = SiteSettingsService::registrationEnabled();
+
+        View::share('siteLogoUrl', $logoUrl);
+        View::share('registrationEnabled', $registrationEnabled);
     }
 }

app/Services/SiteSettingsService.php

@@ -0,0 +1,70 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Facades\Storage;
+
+class SiteSettingsService
+{
+    private static function path(): string
+    {
+        return storage_path('app/site_settings.json');
+    }
+
+    private static function load(): array
+    {
+        $path = self::path();
+        if (! file_exists($path)) {
+            return [];
+        }
+        return json_decode(file_get_contents($path), true) ?: [];
+    }
+
+    private static function save(array $settings): void
+    {
+        file_put_contents(self::path(), json_encode($settings, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
+    }
+
+    public static function get(string $key, mixed $default = null): mixed
+    {
+        return self::load()[$key] ?? $default;
+    }
+
+    public static function set(string $key, mixed $value): void
+    {
+        $settings       = self::load();
+        $settings[$key] = $value;
+        self::save($settings);
+    }
+
+    public static function all(): array
+    {
+        return self::load();
+    }
+
+    // ── Logo ─────────────────────────────────────────────────────────────────
+
+    public static function logoUrl(): ?string
+    {
+        $logoPath = self::get('logo_path');
+        if (! $logoPath) {
+            return null;
+        }
+        try {
+            if (! Storage::disk('public')->exists($logoPath)) {
+                return null;
+            }
+            return Storage::disk('public')->url($logoPath);
+        } catch (\Exception) {
+            return null;
+        }
+    }
+
+    // ── Inscriptions ─────────────────────────────────────────────────────────
+
+    public static function registrationEnabled(): bool
+    {
+        // Désactivées par défaut
+        return (bool) self::get('registration_enabled', false);
+    }
+}