feat: add region and terms to intro

assets/translations/strings.i18n.json

@@ -10,6 +10,7 @@
         "sortBy": "Sort by"
     },
     "intro": {
+        "termsAndPolicyCaution(rich)": "by continuing you agree with ${tap(@:about.termsAndConditions)}",
         "start": "Start"
     },
     "home": {
@@ -104,10 +105,17 @@
     },
     "settings": {
         "pageTitle": "Settings",
-        "requiresRestartMsg": "for this to take effect restart the app",
+        "requiresRestartMsg": "For this to take effect restart the app",
         "general": {
             "sectionTitle": "General",
             "locale": "Language",
+            "region": "Region",
+            "regionMsg": "Helps set default options to bypass domestic addresses",
+            "regions": {
+                "ir": "Iran (ir)",
+                "cn": "China (cn)",
+                "other": "Other"
+            },
             "themeMode": "Theme Mode",
             "themeModes": {
                 "system": "Follow system theme",
@@ -182,7 +190,9 @@
         "version": "Version",
         "sourceCode": "Source Code",
         "telegramChannel": "Telegram Channel",
-        "checkForUpdate": "Check for update"
+        "checkForUpdate": "Check for update",
+        "privacyPolicy": "Privacy policy",
+        "termsAndConditions": "Terms and conditions"
     },
     "appUpdate": {
         "dialogTitle": "Update Available",

assets/translations/strings_fa.i18n.json

@@ -10,6 +10,7 @@
         "sortBy": "مرتب‌سازی براساس"
     }, 
     "intro": {
+        "termsAndPolicyCaution(rich)": "در صورت ادامه با ${tap(@:about.termsAndConditions)} موافقت میکنید",
         "start": "شروع"
     },
     "home": {
@@ -108,6 +109,13 @@
         "general": {
             "sectionTitle": "اصلی",
             "locale": "زبان",
+            "region": "منطقه",
+            "regionMsg": "به انتخاب تنظیمات پیش‌فرض برای دورزدن آدرس‌های داخلی کمک میکند",
+            "regions": {
+                "ir": "ایران (ir)",
+                "cn": "چین (cn)",
+                "other": "سایر"
+            },
             "themeMode": "تم مود",
             "themeModes": {
                 "system": "پیروی از تم دستگاه",
@@ -182,7 +190,9 @@
         "version": "ورژن",
         "sourceCode": "سورس کد",
         "telegramChannel": "کانال تلگرام",
-        "checkForUpdate": "بررسی آپدیت جدید"
+        "checkForUpdate": "بررسی آپدیت جدید",
+        "privacyPolicy": "سیاست حفظ حریم خصوصی",
+        "termsAndConditions": "شرایط و ضوابط استفاده"
     },
     "appUpdate": {
         "dialogTitle": "نسخه جدید موجود است",

lib/core/prefs/general_prefs.dart

@@ -24,6 +24,25 @@ class IntroCompleted extends _$IntroCompleted {
   }
 }
 
+@Riverpod(keepAlive: true)
+class RegionNotifier extends _$RegionNotifier {
+  late final _pref = Pref(
+    ref.watch(sharedPreferencesProvider),
+    "region",
+    Region.other,
+    mapFrom: Region.values.byName,
+    mapTo: (value) => value.name,
+  );
+
+  @override
+  Region build() => _pref.getValue();
+
+  Future<void> update(Region value) {
+    state = value;
+    return _pref.update(value);
+  }
+}
+
 @Riverpod(keepAlive: true)
 class SilentStartNotifier extends _$SilentStartNotifier {
   late final _pref =

lib/core/prefs/locale_prefs.dart

@@ -13,7 +13,7 @@ class LocaleNotifier extends _$LocaleNotifier {
   late final _pref = Pref(
     ref.watch(sharedPreferencesProvider),
     "locale",
-    AppLocale.en,
+    AppLocaleUtils.findDeviceLocale(),
     mapFrom: AppLocale.values.byName,
     mapTo: (value) => value.name,
   );

lib/domain/constants.dart

@@ -10,6 +10,8 @@ abstract class Constants {
   static const githubLatestReleaseUrl =
       "https://github.com/hiddify/hiddify-next/releases/latest";
   static const telegramChannelUrl = "https://t.me/hiddify";
+  static const privacyPolicyUrl = "https://hiddify.com/en/privacy-policy/";
+  static const termsAndConditionsUrl = "https://hiddify.com/terms/";
 }
 
 abstract class Defaults {

lib/domain/singbox/rules.dart

@@ -22,3 +22,15 @@ enum PerAppProxyMode {
           ),
       };
 }
+
+enum Region {
+  ir,
+  cn,
+  other;
+
+  String present(TranslationsEn t) => switch (this) {
+        ir => t.settings.general.regions.ir,
+        cn => t.settings.general.regions.cn,
+        other => t.settings.general.regions.other,
+      };
+}

lib/features/common/general_pref_tiles.dart

@@ -3,6 +3,7 @@ import 'package:flutter_localized_locales/flutter_localized_locales.dart';
 import 'package:go_router/go_router.dart';
 import 'package:hiddify/core/core_providers.dart';
 import 'package:hiddify/core/prefs/prefs.dart';
+import 'package:hiddify/domain/singbox/singbox.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 
 class LocalePrefTile extends HookConsumerWidget {
@@ -54,6 +55,48 @@ class LocalePrefTile extends HookConsumerWidget {
   }
 }
 
+class RegionPrefTile extends HookConsumerWidget {
+  const RegionPrefTile({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final t = ref.watch(translationsProvider);
+
+    final region = ref.watch(regionNotifierProvider);
+
+    return ListTile(
+      title: Text(t.settings.general.region),
+      subtitle: Text(region.present(t)),
+      leading: const Icon(Icons.my_location),
+      onTap: () async {
+        final selectedRegion = await showDialog<Region>(
+          context: context,
+          builder: (context) {
+            return SimpleDialog(
+              title: Text(t.settings.general.region),
+              children: Region.values
+                  .map(
+                    (e) => RadioListTile(
+                      title: Text(e.present(t)),
+                      value: e,
+                      groupValue: region,
+                      onChanged: (e) => context.pop(e),
+                    ),
+                  )
+                  .toList(),
+            );
+          },
+        );
+        if (selectedRegion != null) {
+          await ref
+              .read(regionNotifierProvider.notifier)
+              .update(selectedRegion);
+        }
+      },
+    );
+  }
+}
+
 class EnableAnalyticsPrefTile extends HookConsumerWidget {
   const EnableAnalyticsPrefTile({
     super.key,

lib/features/intro/view/intro_page.dart

@@ -1,7 +1,9 @@
+import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:gap/gap.dart';
 import 'package:hiddify/core/core_providers.dart';
 import 'package:hiddify/core/prefs/prefs.dart';
+import 'package:hiddify/domain/constants.dart';
 import 'package:hiddify/features/common/common.dart';
 import 'package:hiddify/gen/assets.gen.dart';
 import 'package:hiddify/utils/utils.dart';
@@ -37,7 +39,28 @@ class IntroPage extends HookConsumerWidget with PresLogger {
               children: [
                 const LocalePrefTile(),
                 const SliverGap(8),
+                const RegionPrefTile(),
+                const SliverGap(8),
                 const EnableAnalyticsPrefTile(),
+                const SliverGap(8),
+                Padding(
+                  padding: const EdgeInsets.symmetric(horizontal: 16),
+                  child: Text.rich(
+                    t.intro.termsAndPolicyCaution(
+                      tap: (text) => TextSpan(
+                        text: text,
+                        style: const TextStyle(color: Colors.blue),
+                        recognizer: TapGestureRecognizer()
+                          ..onTap = () async {
+                            await UriUtils.tryLaunch(
+                              Uri.parse(Constants.termsAndConditionsUrl),
+                            );
+                          },
+                      ),
+                    ),
+                    style: Theme.of(context).textTheme.bodySmall,
+                  ),
+                ),
                 Padding(
                   padding: const EdgeInsets.symmetric(
                     horizontal: 16,