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>

web/manifest.json

@@ -1,6 +1,6 @@
 {
-    "name": "prosappco",
-    "short_name": "prosappco",
+    "name": "prosapp_web_app",
+    "short_name": "prosapp_web_app",
     "start_url": ".",
     "display": "standalone",
     "background_color": "#0175C2",