feat: 6 mejoras simultáneas en prosappweb

- web/index.html: lang=es (evita traductor) + cache busting con timestamp en flutter_bootstrap.js
- profesional.dart: rate → número, location_preferences → string para coincidir con backend DTO
- location_preferences.dart: funciones locationPrefsToString/locationPrefsFromValue
- auth_provider.dart: _navigateAfterAuth redirige a setup-city si user.city vacío, método updateCity y linkEmailWithOtp
- setup_city_view.dart: nueva vista con GPS + Nominatim para detectar ciudad, campo editable, omitir
- email_view.dart: rediseño completo con flujo OTP (paso 1: email+contraseña → paso 2: código recibido en correo)
- router + dashboard_handlers: ruta /dashboard/setup-city

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

lib/router/dashboard_handlers.dart

@@ -22,6 +22,7 @@ import 'package:prosapp_web_app/ui/views/services_history_view.dart';
 import 'package:prosapp_web_app/ui/views/services_requests_view.dart';
 import 'package:prosapp_web_app/ui/views/services_view.dart';
 import 'package:prosapp_web_app/ui/views/setup_name_view.dart';
+import 'package:prosapp_web_app/ui/views/setup_city_view.dart';
 import 'package:prosapp_web_app/ui/views/support_view.dart';
 import 'package:provider/provider.dart';
 
@@ -52,6 +53,17 @@ class DashboardHandlers {
     },
   );
 
+  static Handler setupCity = Handler(
+    handlerFunc: (context, params) {
+      final authProvider = Provider.of<AuthProvider>(context!);
+      if (authProvider.authStatus == AuthStatus.authenticated) {
+        return const SetupCityView();
+      } else {
+        return const LoginView();
+      }
+    },
+  );
+
   static Handler support = Handler(
     handlerFunc: (context, params) {
       final authProvider = Provider.of<AuthProvider>(context!);

lib/router/router.dart

@@ -19,6 +19,7 @@ class Flurorouter {
 
   // Onboarding
   static String setupNameRoute = "/dashboard/setup-name";
+  static String setupCityRoute = "/dashboard/setup-city";
 
   // Users
   static String profileRoute = "/dashboard/profile";
@@ -77,6 +78,11 @@ class Flurorouter {
       handler: DashboardHandlers.setupName,
       transitionType: TransitionType.none,
     );
+    router.define(
+      setupCityRoute,
+      handler: DashboardHandlers.setupCity,
+      transitionType: TransitionType.none,
+    );
 
     // Dashboard Routes
     router.define(