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();
+  }
+}