replace: swap prosappweb content for prosapp_web_app (more complete version)

prosapp_web_app has chat, dashboard, calendar, support, 13 providers and
Fluro URL routing. Keep Dockerfile + nginx.conf from previous prosappweb.
Upgrade google_fonts 6.2.1 → 8.1.0 (Dart 3.12 compat fix).

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

lib/services/local_storage.dart

@@ -0,0 +1,9 @@
+import 'package:shared_preferences/shared_preferences.dart';
+
+class LocalStorage {
+  static late SharedPreferences prefs;
+
+  static Future<void> configurePrefs() async {
+    prefs = await SharedPreferences.getInstance();
+  }
+}

lib/services/navigation_service.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+
+class NavigationService {
+  static GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
+
+  static navigateTo(String routeName) {
+    navigatorKey.currentState!.pushNamed(routeName);
+  }
+
+  static Future<dynamic> navigateToFuture(String routeName) async {
+    return await navigatorKey.currentState!.pushNamed(routeName);
+  }
+
+  static replaceTo(String routeName) {
+    navigatorKey.currentState!.pushReplacementNamed(routeName);
+  }
+}

lib/services/notifications_service.dart

@@ -0,0 +1,53 @@
+import 'package:flutter/material.dart';
+
+class NotificationsService {
+  static GlobalKey<ScaffoldMessengerState> messengerKey = GlobalKey<ScaffoldMessengerState>();
+
+  static showSnackBarError(String message) {
+    final snackBar = SnackBar(
+      backgroundColor: Colors.red.withOpacity(0.9),
+      content: Text(
+        message,
+        style: const TextStyle(
+          color: Colors.white,
+          fontSize: 20,
+        ),
+      ),
+    );
+
+    messengerKey.currentState!
+      ..removeCurrentSnackBar()
+      ..showSnackBar(snackBar);
+  }
+
+  static showSnackbar(String message) {
+    final snackBar = SnackBar(
+      backgroundColor: Colors.blue.withOpacity(0.9),
+      content: Text(
+        message,
+        style: const TextStyle(
+          color: Colors.white,
+          fontSize: 20,
+        ),
+      ),
+    );
+
+    messengerKey.currentState!
+      ..removeCurrentSnackBar()
+      ..showSnackBar(snackBar);
+  }
+
+  static showBusyIndicator(BuildContext context) {
+    const AlertDialog dialog = AlertDialog(
+      content: SizedBox(
+        width: 100,
+        height: 100,
+        child: Center(
+          child: CircularProgressIndicator(),
+        ),
+      ),
+    );
+
+    showDialog(context: context, builder: (_) => dialog);
+  }
+}