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/utils/local_notifications.dart

@@ -0,0 +1,27 @@
+import 'package:http/http.dart' as http;
+import 'dart:convert';
+import 'package:prosapp_web_app/utils/constants.dart' show API_BASE_URL;
+
+class LocalNotifications {
+  static Future<void> sendPushNotification(
+      String token, String title, String body) async {
+    try {
+      http.Response response = await http.post(
+        Uri.parse('$API_BASE_URL/notifications/send'),
+        headers: <String, String>{
+          'Content-Type': 'application/json; charset=UTF-8',
+        },
+        body: jsonEncode(
+          <String, dynamic>{
+            'title': title,
+            'body': body,
+            'to': token,
+          },
+        ),
+      );
+      response;
+    } catch (e) {
+      rethrow;
+    }
+  }
+}