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/logo.dart

@@ -0,0 +1,29 @@
+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+
+class Logo extends StatelessWidget {
+  const Logo({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return Container(
+      padding: EdgeInsets.only(top: 30),
+      child: Row(
+        mainAxisAlignment: MainAxisAlignment.center,
+        children: [
+          Image.asset('logo.png', width: 50, height: 50),
+          SizedBox(width: 8),
+          Text(
+            'Prosapp',
+            style: GoogleFonts.montserratAlternates(
+              fontSize: 20,
+              fontWeight: FontWeight.w200,
+              color: Colors.white,
+            ),
+          ),
+          SizedBox(width: 10),
+        ],
+      ),
+    );
+  }
+}