TimeZone support

lib/BlindMasterScreens/accountManagement/account_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'package:blind_master/BlindMasterResources/error_snackbar.dart';
 import 'package:blind_master/BlindMasterResources/secure_transmissions.dart';
+import 'package:blind_master/BlindMasterResources/timezone_picker.dart';
 import 'package:blind_master/BlindMasterScreens/accountManagement/change_password_screen.dart';
 import 'package:blind_master/BlindMasterScreens/accountManagement/change_email_screen.dart';
 import 'package:flutter/material.dart';
@@ -17,6 +18,7 @@ class _AccountScreenState extends State<AccountScreen> {
   String? name;
   String? email;
   String? createdAt;
+  String? timezone;
   bool isLoading = true;
 
   @override
@@ -38,7 +40,8 @@ class _AccountScreenState extends State<AccountScreen> {
         setState(() {
           name = body['name'] ?? 'N/A';
           email = body['email'] ?? 'N/A';
-          
+          timezone = body['timezone'] as String?;
+
           // Parse and format the created_at timestamp
           if (body['created_at'] != null) {
             try {
@@ -67,6 +70,64 @@ class _AccountScreenState extends State<AccountScreen> {
     }
   }
 
+  String _tzAbbrev(String? ianaKey) {
+    if (ianaKey == null) return 'None (UTC)';
+    final match = kTimezones.firstWhere(
+      (tz) => tz['tz'] == ianaKey,
+      orElse: () => {'display': ianaKey, 'tz': ianaKey},
+    );
+    final display = match['display']!;
+    final parenMatch = RegExp(r'\(([^)]+)\)').firstMatch(display);
+    return parenMatch?.group(1) ?? display;
+  }
+
+  Future<void> _handleChangeTimezone() async {
+    String? selected = timezone;
+    final confirmed = await showDialog<bool>(
+      context: context,
+      builder: (dialogContext) {
+        return StatefulBuilder(
+          builder: (context, setDialogState) {
+            return AlertDialog(
+              title: const Text('Account Timezone'),
+              content: TimezonePicker(
+                value: selected,
+                label: 'Default Timezone',
+                onChanged: (tz) => setDialogState(() => selected = tz),
+              ),
+              actions: [
+                TextButton(
+                  onPressed: () => Navigator.of(dialogContext).pop(false),
+                  child: const Text('Cancel'),
+                ),
+                ElevatedButton(
+                  style: ElevatedButton.styleFrom(
+                    backgroundColor: Theme.of(context).primaryColorLight,
+                    foregroundColor: Colors.white,
+                  ),
+                  onPressed: () => Navigator.of(dialogContext).pop(true),
+                  child: const Text('Save'),
+                ),
+              ],
+            );
+          },
+        );
+      },
+    );
+
+    if (confirmed == true && selected != null && mounted) {
+      try {
+        final response = await securePost({'timezone': selected}, 'update_user_timezone');
+        if (response == null) throw Exception('No response');
+        if (response.statusCode != 200) throw Exception('Failed to update timezone');
+        setState(() => timezone = selected);
+      } catch (e) {
+        if (!mounted) return;
+        ScaffoldMessenger.of(context).showSnackBar(errorSnackbar(e));
+      }
+    }
+  }
+
   Future<void> _handleDeleteAccount() async {
     final primaryColor = Theme.of(context).primaryColorLight;
 
@@ -268,6 +329,13 @@ class _AccountScreenState extends State<AccountScreen> {
                               );
                             },
                           ),
+                          Divider(height: 1),
+                          ListTile(
+                            leading: const Icon(Icons.access_time),
+                            title: Text('Timezone: ${_tzAbbrev(timezone)}'),
+                            trailing: const Icon(Icons.arrow_forward_ios, size: 16),
+                            onTap: _handleChangeTimezone,
+                          ),
                         ],
                       ),
                     ),