diff --git a/lib/providers/sn_network.dart b/lib/providers/sn_network.dart
index bcdea9e..9c3236c 100644
--- a/lib/providers/sn_network.dart
+++ b/lib/providers/sn_network.dart
@@ -1,11 +1,12 @@
+import 'dart:async';
 import 'dart:convert';
 import 'dart:developer';
 
 import 'package:dio/dio.dart';
 import 'package:dio_smart_retry/dio_smart_retry.dart';
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:surface/providers/adapters/sn_network_universal.dart';
+import 'package:synchronized/synchronized.dart';
 
 const kAtkStoreKey = 'nex_user_atk';
 const kRtkStoreKey = 'nex_user_rtk';
@@ -23,7 +24,6 @@ class SnNetworkProvider {
   late Dio client;
 
   late final SharedPreferences _prefs;
-  late final FlutterSecureStorage _storage = FlutterSecureStorage();
 
   SnNetworkProvider() {
     client = Dio();
@@ -62,9 +62,19 @@ class SnNetworkProvider {
     });
   }
 
+  final tkLock = Lock();
+
+  Completer<String?>? _refreshCompleter;
+
   Future<String?> getFreshAtk() async {
+    if (_refreshCompleter != null) {
+      return await _refreshCompleter!.future;
+    } else {
+      _refreshCompleter = Completer<String?>();
+    }
+
     try {
-      var atk = await _storage.read(key: kAtkStoreKey);
+      var atk = _prefs.getString(kAtkStoreKey);
       if (atk != null) {
         final atkParts = atk.split('.');
         if (atkParts.length != 3) {
@@ -94,13 +104,18 @@ class SnNetworkProvider {
         }
 
         if (atk != null) {
+          _refreshCompleter!.complete(atk);
           return atk;
         } else {
           log('Access token refresh failed...');
+          _refreshCompleter!.complete(null);
         }
       }
     } catch (err) {
       log('Failed to authenticate user: $err');
+      _refreshCompleter!.completeError(err);
+    } finally {
+      _refreshCompleter = null;
     }
 
     return null;
@@ -111,22 +126,18 @@ class SnNetworkProvider {
     return '${client.options.baseUrl}/cgi/uc/attachments/$ky';
   }
 
-  Future<void> setTokenPair(String atk, String rtk) async {
-    await Future.wait([
-      _storage.write(key: kAtkStoreKey, value: atk),
-      _storage.write(key: kRtkStoreKey, value: rtk),
-    ]);
+  void setTokenPair(String atk, String rtk) {
+    _prefs.setString(kAtkStoreKey, atk);
+    _prefs.setString(kRtkStoreKey, rtk);
   }
 
-  Future<void> clearTokenPair() async {
-    await Future.wait([
-      _storage.delete(key: kAtkStoreKey),
-      _storage.delete(key: kRtkStoreKey),
-    ]);
+  void clearTokenPair() {
+    _prefs.remove(kAtkStoreKey);
+    _prefs.remove(kRtkStoreKey);
   }
 
   Future<String?> refreshToken() async {
-    final rtk = await _storage.read(key: kRtkStoreKey);
+    final rtk = _prefs.getString(kRtkStoreKey);
     if (rtk == null) return null;
 
     final dio = Dio();
@@ -139,7 +150,7 @@ class SnNetworkProvider {
 
     final atk = resp.data['access_token'];
     final nRtk = resp.data['refresh_token'];
-    await setTokenPair(atk, nRtk);
+    setTokenPair(atk, nRtk);
 
     return atk;
   }
diff --git a/lib/providers/userinfo.dart b/lib/providers/userinfo.dart
index c0b1597..26c4ba4 100644
--- a/lib/providers/userinfo.dart
+++ b/lib/providers/userinfo.dart
@@ -1,8 +1,8 @@
 import 'dart:developer';
 
 import 'package:flutter/material.dart';
-import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:provider/provider.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 import 'package:surface/providers/sn_network.dart';
 import 'package:surface/types/account.dart';
 
@@ -11,14 +11,17 @@ class UserProvider extends ChangeNotifier {
   SnAccount? user;
 
   late final SnNetworkProvider _sn;
-  late final FlutterSecureStorage _storage = FlutterSecureStorage();
 
-  Future<String?> get atk => _storage.read(key: kAtkStoreKey);
+  Future<String?> get atk async {
+    final prefs = await SharedPreferences.getInstance();
+    return prefs.getString(kAtkStoreKey);
+  }
 
   UserProvider(BuildContext context) {
     _sn = context.read<SnNetworkProvider>();
 
-    _storage.read(key: kAtkStoreKey).then((value) {
+    SharedPreferences.getInstance().then((prefs) {
+      final value = prefs.getString(kAtkStoreKey);
       isAuthorized = value != null;
       notifyListeners();
       refreshUser().then((value) {
@@ -41,7 +44,7 @@ class UserProvider extends ChangeNotifier {
   }
 
   void logoutUser() async {
-    await _sn.clearTokenPair();
+    _sn.clearTokenPair();
     isAuthorized = false;
     user = null;
     notifyListeners();
diff --git a/lib/screens/auth/login.dart b/lib/screens/auth/login.dart
index d4d3082..e7cff66 100644
--- a/lib/screens/auth/login.dart
+++ b/lib/screens/auth/login.dart
@@ -151,7 +151,7 @@ class _LoginCheckScreenState extends State<_LoginCheckScreen> {
       });
       final atk = tokenResp.data['access_token'];
       final rtk = tokenResp.data['refresh_token'];
-      await sn.setTokenPair(atk, rtk);
+      sn.setTokenPair(atk, rtk);
       if (!mounted) return;
       final user = context.read<UserProvider>();
       final userinfo = await user.refreshUser();
diff --git a/lib/screens/post/post_search.dart b/lib/screens/post/post_search.dart
index e773da9..a9b1c2a 100644
--- a/lib/screens/post/post_search.dart
+++ b/lib/screens/post/post_search.dart
@@ -74,6 +74,15 @@ class _PostSearchScreenState extends State<PostSearchScreen> {
     if (mounted) setState(() => _isBusy = false);
   }
 
+  void _showAdvancedSearchTune() {
+    showModalBottomSheet(
+      context: context,
+      builder: (context) => Column(
+        children: [],
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     const labelShadows = <Shadow>[
@@ -87,11 +96,17 @@ class _PostSearchScreenState extends State<PostSearchScreen> {
     return Scaffold(
       appBar: AppBar(
         title: Text('screenPostSearch').tr(),
+        actions: [
+          IconButton(
+            icon: const Icon(Symbols.tune),
+            onPressed: _showAdvancedSearchTune,
+          ),
+        ],
       ),
       body: Stack(
         children: [
           InfiniteList(
-            padding: const EdgeInsets.only(top: 96),
+            padding: const EdgeInsets.only(top: 100),
             itemCount: _posts.length,
             isLoading: _isBusy,
             hasReachedMax: _postCount != null && _posts.length >= _postCount!,
diff --git a/linux/flutter/generated_plugin_registrant.cc b/linux/flutter/generated_plugin_registrant.cc
index a6f6671..66ab3fc 100644
--- a/linux/flutter/generated_plugin_registrant.cc
+++ b/linux/flutter/generated_plugin_registrant.cc
@@ -7,7 +7,6 @@
 #include "generated_plugin_registrant.h"
 
 #include <file_selector_linux/file_selector_plugin.h>
-#include <flutter_secure_storage_linux/flutter_secure_storage_linux_plugin.h>
 #include <flutter_udid/flutter_udid_plugin.h>
 #include <isar_flutter_libs/isar_flutter_libs_plugin.h>
 #include <media_kit_libs_linux/media_kit_libs_linux_plugin.h>
@@ -20,9 +19,6 @@ void fl_register_plugins(FlPluginRegistry* registry) {
   g_autoptr(FlPluginRegistrar) file_selector_linux_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FileSelectorPlugin");
   file_selector_plugin_register_with_registrar(file_selector_linux_registrar);
-  g_autoptr(FlPluginRegistrar) flutter_secure_storage_linux_registrar =
-      fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterSecureStorageLinuxPlugin");
-  flutter_secure_storage_linux_plugin_register_with_registrar(flutter_secure_storage_linux_registrar);
   g_autoptr(FlPluginRegistrar) flutter_udid_registrar =
       fl_plugin_registry_get_registrar_for_plugin(registry, "FlutterUdidPlugin");
   flutter_udid_plugin_register_with_registrar(flutter_udid_registrar);
diff --git a/linux/flutter/generated_plugins.cmake b/linux/flutter/generated_plugins.cmake
index 5a108eb..51673e7 100644
--- a/linux/flutter/generated_plugins.cmake
+++ b/linux/flutter/generated_plugins.cmake
@@ -4,7 +4,6 @@
 
 list(APPEND FLUTTER_PLUGIN_LIST
   file_selector_linux
-  flutter_secure_storage_linux
   flutter_udid
   isar_flutter_libs
   media_kit_libs_linux
diff --git a/macos/Flutter/GeneratedPluginRegistrant.swift b/macos/Flutter/GeneratedPluginRegistrant.swift
index e85a9e7..2d9b468 100644
--- a/macos/Flutter/GeneratedPluginRegistrant.swift
+++ b/macos/Flutter/GeneratedPluginRegistrant.swift
@@ -10,7 +10,6 @@ import file_selector_macos
 import firebase_analytics
 import firebase_core
 import firebase_messaging
-import flutter_secure_storage_macos
 import flutter_udid
 import isar_flutter_libs
 import media_kit_libs_macos_video
@@ -31,7 +30,6 @@ func RegisterGeneratedPlugins(registry: FlutterPluginRegistry) {
   FLTFirebaseAnalyticsPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseAnalyticsPlugin"))
   FLTFirebaseCorePlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseCorePlugin"))
   FLTFirebaseMessagingPlugin.register(with: registry.registrar(forPlugin: "FLTFirebaseMessagingPlugin"))
-  FlutterSecureStoragePlugin.register(with: registry.registrar(forPlugin: "FlutterSecureStoragePlugin"))
   FlutterUdidPlugin.register(with: registry.registrar(forPlugin: "FlutterUdidPlugin"))
   IsarFlutterLibsPlugin.register(with: registry.registrar(forPlugin: "IsarFlutterLibsPlugin"))
   MediaKitLibsMacosVideoPlugin.register(with: registry.registrar(forPlugin: "MediaKitLibsMacosVideoPlugin"))
diff --git a/pubspec.lock b/pubspec.lock
index e1d2e08..7180182 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -608,54 +608,6 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.0.23"
-  flutter_secure_storage:
-    dependency: "direct main"
-    description:
-      name: flutter_secure_storage
-      sha256: "165164745e6afb5c0e3e3fcc72a012fb9e58496fb26ffb92cf22e16a821e85d0"
-      url: "https://pub.dev"
-    source: hosted
-    version: "9.2.2"
-  flutter_secure_storage_linux:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_linux
-      sha256: "4d91bfc23047422cbcd73ac684bc169859ee766482517c22172c86596bf1464b"
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.1"
-  flutter_secure_storage_macos:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_macos
-      sha256: "1693ab11121a5f925bbea0be725abfcfbbcf36c1e29e571f84a0c0f436147a81"
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.2"
-  flutter_secure_storage_platform_interface:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_platform_interface
-      sha256: cf91ad32ce5adef6fba4d736a542baca9daf3beac4db2d04be350b87f69ac4a8
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.1.2"
-  flutter_secure_storage_web:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_web
-      sha256: f4ebff989b4f07b2656fb16b47852c0aab9fed9b4ec1c70103368337bc1886a9
-      url: "https://pub.dev"
-    source: hosted
-    version: "1.2.1"
-  flutter_secure_storage_windows:
-    dependency: transitive
-    description:
-      name: flutter_secure_storage_windows
-      sha256: b20b07cb5ed4ed74fc567b78a72936203f587eba460af1df11281c9326cd3709
-      url: "https://pub.dev"
-    source: hosted
-    version: "3.1.2"
   flutter_shaders:
     dependency: transitive
     description:
@@ -1608,7 +1560,7 @@ packages:
     source: hosted
     version: "1.0.6"
   synchronized:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: synchronized
       sha256: "69fe30f3a8b04a0be0c15ae6490fc859a78ef4c43ae2dd5e8a623d45bfcf9225"
diff --git a/pubspec.yaml b/pubspec.yaml
index 38db34e..9724db8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -58,7 +58,6 @@ dependencies:
   google_fonts: ^6.2.1
   path: ^1.9.0
   relative_time: ^5.0.0
-  flutter_secure_storage: ^9.2.2
   image_picker: ^1.1.2
   cross_file: ^0.3.4+2
   file_picker: ^8.1.3
@@ -88,6 +87,7 @@ dependencies:
   media_kit_libs_video: ^1.0.5
   pasteboard: ^0.3.0
   sentry_flutter: ^8.10.1
+  synchronized: ^3.3.0+3
 
 dev_dependencies:
   flutter_test:
diff --git a/windows/flutter/generated_plugin_registrant.cc b/windows/flutter/generated_plugin_registrant.cc
index 3d874c9..b0b33d1 100644
--- a/windows/flutter/generated_plugin_registrant.cc
+++ b/windows/flutter/generated_plugin_registrant.cc
@@ -9,7 +9,6 @@
 #include <connectivity_plus/connectivity_plus_windows_plugin.h>
 #include <file_selector_windows/file_selector_windows.h>
 #include <firebase_core/firebase_core_plugin_c_api.h>
-#include <flutter_secure_storage_windows/flutter_secure_storage_windows_plugin.h>
 #include <flutter_udid/flutter_udid_plugin_c_api.h>
 #include <isar_flutter_libs/isar_flutter_libs_plugin.h>
 #include <media_kit_libs_windows_video/media_kit_libs_windows_video_plugin_c_api.h>
@@ -26,8 +25,6 @@ void RegisterPlugins(flutter::PluginRegistry* registry) {
       registry->GetRegistrarForPlugin("FileSelectorWindows"));
   FirebaseCorePluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FirebaseCorePluginCApi"));
-  FlutterSecureStorageWindowsPluginRegisterWithRegistrar(
-      registry->GetRegistrarForPlugin("FlutterSecureStorageWindowsPlugin"));
   FlutterUdidPluginCApiRegisterWithRegistrar(
       registry->GetRegistrarForPlugin("FlutterUdidPluginCApi"));
   IsarFlutterLibsPluginRegisterWithRegistrar(
diff --git a/windows/flutter/generated_plugins.cmake b/windows/flutter/generated_plugins.cmake
index b714b75..75f22ee 100644
--- a/windows/flutter/generated_plugins.cmake
+++ b/windows/flutter/generated_plugins.cmake
@@ -6,7 +6,6 @@ list(APPEND FLUTTER_PLUGIN_LIST
   connectivity_plus
   file_selector_windows
   firebase_core
-  flutter_secure_storage_windows
   flutter_udid
   isar_flutter_libs
   media_kit_libs_windows_video