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/time_of_day_extension.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+
+extension TimeOfDayExtension on TimeOfDay {
+  TimeOfDay add({int hour = 0, int minute = 0}) {
+    return replacing(hour: this.hour + hour, minute: this.minute + minute);
+  }
+
+  int compareTo(TimeOfDay other) {
+    if (hour < other.hour) return -1;
+    if (hour > other.hour) return 1;
+    if (minute < other.minute) return -1;
+    if (minute > other.minute) return 1;
+    return 0;
+  }
+
+  bool isBefore(TimeOfDay other) {
+    return compareTo(other) == -1;
+  }
+}