TimeZone support

lib/BlindMasterResources/timezone_picker.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+
+const List<Map<String, String>> kTimezones = [
+  {'display': 'Eastern Time (ET)', 'tz': 'America/New_York'},
+  {'display': 'Central Time (CT)', 'tz': 'America/Chicago'},
+  {'display': 'Mountain Time (MT)', 'tz': 'America/Denver'},
+  {'display': 'Mountain Time – Arizona (no DST)', 'tz': 'America/Phoenix'},
+  {'display': 'Pacific Time (PT)', 'tz': 'America/Los_Angeles'},
+  {'display': 'Alaska Time (AKT)', 'tz': 'America/Anchorage'},
+  {'display': 'Hawaii Time (HT)', 'tz': 'Pacific/Honolulu'},
+  {'display': 'UTC', 'tz': 'UTC'},
+];
+
+class TimezonePicker extends StatelessWidget {
+  const TimezonePicker({
+    super.key,
+    required this.value,
+    required this.onChanged,
+    this.label = 'Timezone',
+  });
+
+  final String? value;
+  final ValueChanged<String?> onChanged;
+  final String label;
+
+  @override
+  Widget build(BuildContext context) {
+    return InputDecorator(
+      decoration: InputDecoration(
+        labelText: label,
+        border: OutlineInputBorder(borderRadius: BorderRadius.circular(8)),
+        contentPadding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
+      ),
+      child: DropdownButton<String>(
+        value: value,
+        hint: const Text('Select timezone'),
+        isExpanded: true,
+        underline: const SizedBox.shrink(),
+        items: kTimezones
+            .map((tz) => DropdownMenuItem(
+                  value: tz['tz'],
+                  child: Text(tz['display']!),
+                ))
+            .toList(),
+        onChanged: onChanged,
+      ),
+    );
+  }
+}