Add APP_DEBUG auth bypass for local development

Skips Keycloak SSO entirely when APP_DEBUG=true, treating every request
as an authenticated dev-admin user. Must stay false in any deployed
environment (see .env_prod).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/Services/AuthService.php

@@ -9,6 +9,25 @@ use Stevenmaguire\OAuth2\Client\Provider\Keycloak;
 
 class AuthService
 {
+    /**
+     * When APP_DEBUG is true, auth is bypassed entirely and every request is
+     * treated as an already-authenticated dev user. Must be false in any
+     * deployed/production environment — see .env_prod.
+     */
+    private static function debugBypass(): bool
+    {
+        return filter_var(getenv('APP_DEBUG'), FILTER_VALIDATE_BOOLEAN);
+    }
+
+    private static function devUser(): array
+    {
+        return [
+            'preferred_username' => 'dev-admin',
+            'email'              => 'dev-admin@localhost',
+            'name'               => 'Dev Admin (APP_DEBUG bypass)',
+        ];
+    }
+
     private static function config(): array
     {
         static $config = null;
@@ -59,6 +78,10 @@ class AuthService
 
     public static function requireLogin(): ?Response
     {
+        if (self::debugBypass()) {
+            return null;
+        }
+
         if (!self::isLoggedIn()) {
             $_SESSION['auth_return_to'] = $_SERVER['REQUEST_URI'] ?? '/';
             return Response::redirect('/auth/login');
@@ -69,11 +92,19 @@ class AuthService
 
     public static function isLoggedIn(): bool
     {
+        if (self::debugBypass()) {
+            return true;
+        }
+
         return !empty($_SESSION['auth_user']);
     }
 
     public static function getCurrentUser(): array
     {
+        if (self::debugBypass() && empty($_SESSION['auth_user'])) {
+            return self::devUser();
+        }
+
         return $_SESSION['auth_user'] ?? [];
     }