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/ui/shared/widgets/navbar_avatar.dart

@@ -0,0 +1,34 @@
+import 'package:flutter/material.dart';
+import 'package:prosapp_web_app/providers/auth_provider.dart';
+import 'package:prosapp_web_app/router/router.dart';
+import 'package:prosapp_web_app/services/navigation_service.dart';
+import 'package:provider/provider.dart';
+
+class NavbarAvatar extends StatelessWidget {
+  const NavbarAvatar({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    final user = Provider.of<AuthProvider>(context).user!;
+
+    final image = (user.picture == '' || user.picture == null)
+        ? const Image(image: AssetImage('no-image.jpg'))
+        : FadeInImage.assetNetwork(
+            placeholder: 'loader.gif',
+            fit: BoxFit.cover,
+            image: user.picture!,
+          );
+
+    return MouseRegion(
+      cursor: SystemMouseCursors.click,
+      child: GestureDetector(
+        onTap: () => NavigationService.replaceTo(Flurorouter.profileRoute),
+        child: SizedBox(
+          width: 40,
+          height: 40,
+          child: ClipOval(child: image),
+        ),
+      ),
+    );
+  }
+}