Implement Asia/Manila Time Zone

Handled saving of Relievers

lib/utils/app_time.dart

@@ -0,0 +1,30 @@
+import 'package:timezone/data/latest.dart' as tz;
+import 'package:timezone/timezone.dart' as tz;
+
+class AppTime {
+  static bool _initialized = false;
+
+  static void initialize({String location = 'Asia/Manila'}) {
+    if (_initialized) return;
+    tz.initializeTimeZones();
+    tz.setLocalLocation(tz.getLocation(location));
+    _initialized = true;
+  }
+
+  static DateTime now() {
+    return tz.TZDateTime.now(tz.local);
+  }
+
+  static DateTime nowUtc() {
+    return now().toUtc();
+  }
+
+  static DateTime toAppTime(DateTime value) {
+    final utc = value.isUtc ? value : value.toUtc();
+    return tz.TZDateTime.from(utc, tz.local);
+  }
+
+  static DateTime parse(String value) {
+    return toAppTime(DateTime.parse(value));
+  }
+}