Lowen-0621 · Lowen-0621 · Jun 28, 2026 · Jun 28, 2026 · Jun 28, 2026 · Jun 28, 2026
diff --git a/clients/app/lib/core/i18n.dart b/clients/app/lib/core/i18n.dart
@@ -22,7 +22,13 @@ const Map<String, Map<AppLang, String>> _dict = {
   'settings.nav.aiModel': {AppLang.zh: 'AI 模型', AppLang.en: 'AI Model'},
   'settings.nav.common': {AppLang.zh: '通用', AppLang.en: 'Common'},
   'settings.nav.terminal': {AppLang.zh: '终端', AppLang.en: 'Terminal'},
-  'settings.nav.theme': {AppLang.zh: '终端主题', AppLang.en: 'Terminal Theme'},
+  'settings.nav.theme': {AppLang.zh: '外观', AppLang.en: 'Appearance'},
+  'settings.theme.scheme': {AppLang.zh: '配色方案', AppLang.en: 'Color Scheme'},
+  'settings.theme.hint': {
+    AppLang.zh: '选择应用的整体配色，立即生效。',
+    AppLang.en: 'Pick the app color scheme. Applies instantly.'
+  },
+  'settings.nav.security': {AppLang.zh: '安全', AppLang.en: 'Security'},
   'settings.nav.shortcuts': {AppLang.zh: '快捷键', AppLang.en: 'Shortcuts'},
 
   // 通用页
@@ -76,6 +82,7 @@ const Map<String, Map<AppLang, String>> _dict = {
   'top.connect': {AppLang.zh: '连接', AppLang.en: 'Connect'},
   'top.newHost': {AppLang.zh: '新建主机', AppLang.en: 'New Host'},
   'top.split': {AppLang.zh: '分屏', AppLang.en: 'Split'},
+  'top.resetLayout': {AppLang.zh: '重置布局', AppLang.en: 'Reset Layout'},
 
   // ========== 面板标题 ==========
   'panel.hosts': {AppLang.zh: '主机', AppLang.en: 'Hosts'},

diff --git a/clients/app/lib/core/lock_store.dart b/clients/app/lib/core/lock_store.dart
@@ -0,0 +1,80 @@
+/// 本地主密码锁 —— 启动时校验，保护本地主机簿/密钥不被随手打开。
+///
+/// 安全设计：
+/// - 不存明文，不存可逆密文，只存「加盐多轮 SHA-256」校验哈希。
+/// - 随机盐（16B）抗彩虹表；多轮迭代（stretch）抬高暴力成本。
+/// - 存 ~/.lowenssh/lock.json，权限 600。
+/// - 未设置主密码时无锁，直接进应用（不强制）。
+library;
+
+import 'dart:convert';
+import 'dart:io';
+import 'dart:math';
+import 'dart:typed_data';
+import 'package:pointycastle/export.dart';
+
+const int _saltLen = 16;
+const int _rounds = 100000; // 迭代轮数，抬高暴力破解成本
+
+String get _lockFile =>
+    '${Platform.environment['HOME'] ?? Platform.environment['USERPROFILE'] ?? '.'}/.lowenssh/lock.json';
+
+/// 加盐多轮 SHA-256：hash = SHA256^rounds(salt + pwd)
+String _hash(String pwd, Uint8List salt) {
+  final digest = SHA256Digest();
+  var cur = Uint8List.fromList([...salt, ...utf8.encode(pwd)]);
+  for (var i = 0; i < _rounds; i++) {
+    cur = digest.process(cur);
+  }
+  return base64.encode(cur);
+}
+
+Uint8List _randomSalt() {
+  final rnd = Random.secure();
+  final b = Uint8List(_saltLen);
+  for (var i = 0; i < _saltLen; i++) {
+    b[i] = rnd.nextInt(256);
+  }
+  return b;
+}
+
+/// 是否已设置主密码
+bool hasMasterPassword() => File(_lockFile).existsSync();
+
+/// 设置/修改主密码（覆盖写）
+void setMasterPassword(String pwd) {
+  final salt = _randomSalt();
+  final data = {
+    'salt': base64.encode(salt),
+    'hash': _hash(pwd, salt),
+    'rounds': _rounds,
+  };
+  final dir = Directory(
+      '${Platform.environment['HOME'] ?? Platform.environment['USERPROFILE'] ?? '.'}/.lowenssh');
+  if (!dir.existsSync()) dir.createSync(recursive: true);
+  final f = File(_lockFile);
+  f.writeAsStringSync(const JsonEncoder.withIndent('  ').convert(data));
+  // 权限 600（仅本人可读写）
+  try {
+    Process.runSync('chmod', ['600', _lockFile]);
+  } catch (_) {/* Windows 无 chmod，忽略 */}
+}
+
+/// 取消主密码（删除锁文件）
+void clearMasterPassword() {
+  final f = File(_lockFile);
+  if (f.existsSync()) f.deleteSync();
+}
+
+/// 校验主密码是否正确
+bool verifyMasterPassword(String pwd) {
+  final f = File(_lockFile);
+  if (!f.existsSync()) return true; // 没设锁视为通过
+  try {
+    final j = jsonDecode(f.readAsStringSync()) as Map<String, dynamic>;
+    final salt = base64.decode(j['salt'] as String);
+    return _hash(pwd, Uint8List.fromList(salt)) == j['hash'] as String;
+  } catch (_) {
+    return false;
+  }
+}
diff --git a/clients/app/lib/core/palette.dart b/clients/app/lib/core/palette.dart
@@ -0,0 +1,225 @@
+import 'package:flutter/material.dart';
+
+/// 一套配色方案的数据载体。字段与 theme.dart 的 AppColors 一一对应。
+/// 新增配色只需 new 一个 AppPalette 实例，不必改调用点。
+class AppPalette {
+  final String id; //        持久化用的稳定标识
+  final String nameZh; //    显示名（中）
+  final String nameEn; //    显示名（英）
+  final Brightness brightness; // 亮/暗，给 Flutter ThemeData 用
+
+  final Color base; //       主背景
+  final Color mantle; //     次背景（侧栏）
+  final Color crust; //      最深（终端/状态栏）
+  final Color surface0; //   边框/分隔
+  final Color surface1; //   高亮边框
+  final Color surface2;
+  final Color text; //       主文字
+  final Color subtext; //    次文字
+  final Color overlay; //    暗淡文字
+  final Color blue;
+  final Color lavender;
+  final Color sapphire;
+  final Color green;
+  final Color yellow;
+  final Color peach;
+  final Color red;
+  final Color mauve;
+  final Color teal;
+  final Color pink;
+
+  const AppPalette({
+    required this.id,
+    required this.nameZh,
+    required this.nameEn,
+    required this.brightness,
+    required this.base,
+    required this.mantle,
+    required this.crust,
+    required this.surface0,
+    required this.surface1,
+    required this.surface2,
+    required this.text,
+    required this.subtext,
+    required this.overlay,
+    required this.blue,
+    required this.lavender,
+    required this.sapphire,
+    required this.green,
+    required this.yellow,
+    required this.peach,
+    required this.red,
+    required this.mauve,
+    required this.teal,
+    required this.pink,
+  });
+}
+
+/// 内置配色方案。均来自 Catppuccin 官方色板，结构一致只是色号不同。
+/// Mocha = 当前默认（暗）；Macchiato/Frappe 是偏暖的暗色；Latte 是亮色。
+class Palettes {
+  /// Catppuccin Mocha（深暗，原默认）
+  static const mocha = AppPalette(
+    id: 'mocha',
+    nameZh: 'Mocha 深暗', nameEn: 'Mocha Dark',
+    brightness: Brightness.dark,
+    base: Color(0xFF1E1E2E),
+    mantle: Color(0xFF181825),
+    crust: Color(0xFF11111B),
+    surface0: Color(0xFF313244),
+    surface1: Color(0xFF45475A),
+    surface2: Color(0xFF585B70),
+    text: Color(0xFFCDD6F4),
+    subtext: Color(0xFFA6ADC8),
+    overlay: Color(0xFF6C7086),
+    blue: Color(0xFF89B4FA),
+    lavender: Color(0xFFB4BEFE),
+    sapphire: Color(0xFF74C7EC),
+    green: Color(0xFFA6E3A1),
+    yellow: Color(0xFFF9E2AF),
+    peach: Color(0xFFFAB387),
+    red: Color(0xFFF38BA8),
+    mauve: Color(0xFFCBA6F7),
+    teal: Color(0xFF94E2D5),
+    pink: Color(0xFFF5C2E7),
+  );
+
+  /// Catppuccin Macchiato（暗，比 Mocha 略亮偏暖）
+  static const macchiato = AppPalette(
+    id: 'macchiato',
+    nameZh: 'Macchiato 暖暗', nameEn: 'Macchiato Warm',
+    brightness: Brightness.dark,
+    base: Color(0xFF24273A),
+    mantle: Color(0xFF1E2030),
+    crust: Color(0xFF181926),
+    surface0: Color(0xFF363A4F),
+    surface1: Color(0xFF494D64),
+    surface2: Color(0xFF5B6078),
+    text: Color(0xFFCAD3F5),
+    subtext: Color(0xFFA5ADCB),
+    overlay: Color(0xFF6E738D),
+    blue: Color(0xFF8AADF4),
+    lavender: Color(0xFFB7BDF8),
+    sapphire: Color(0xFF7DC4E4),
+    green: Color(0xFFA6DA95),
+    yellow: Color(0xFFEED49F),
+    peach: Color(0xFFF5A97F),
+    red: Color(0xFFED8796),
+    mauve: Color(0xFFC6A0F6),
+    teal: Color(0xFF8BD5CA),
+    pink: Color(0xFFF5BDE6),
+  );
+
+  /// Catppuccin Frappé（暗，更柔和的中间调）
+  static const frappe = AppPalette(
+    id: 'frappe',
+    nameZh: 'Frappé 柔暗', nameEn: 'Frappé Soft',
+    brightness: Brightness.dark,
+    base: Color(0xFF303446),
+    mantle: Color(0xFF292C3C),
+    crust: Color(0xFF232634),
+    surface0: Color(0xFF414559),
+    surface1: Color(0xFF51576D),
+    surface2: Color(0xFF626880),
+    text: Color(0xFFC6D0F5),
+    subtext: Color(0xFFA5ADCE),
+    overlay: Color(0xFF737994),
+    blue: Color(0xFF8CAAEE),
+    lavender: Color(0xFFBABBF1),
+    sapphire: Color(0xFF85C1DC),
+    green: Color(0xFFA6D189),
+    yellow: Color(0xFFE5C890),
+    peach: Color(0xFFEF9F76),
+    red: Color(0xFFE78284),
+    mauve: Color(0xFFCA9EE6),
+    teal: Color(0xFF81C8BE),
+    pink: Color(0xFFF4B8E4),
+  );
+
+  /// Catppuccin Latte（亮色）
+  static const latte = AppPalette(
+    id: 'latte',
+    nameZh: 'Latte 亮色', nameEn: 'Latte Light',
+    brightness: Brightness.light,
+    base: Color(0xFFEFF1F5),
+    mantle: Color(0xFFE6E9EF),
+    crust: Color(0xFFDCE0E8),
+    surface0: Color(0xFFCCD0DA),
+    surface1: Color(0xFFBCC0CC),
+    surface2: Color(0xFFACB0BE),
+    text: Color(0xFF4C4F69),
+    subtext: Color(0xFF5C5F77),
+    overlay: Color(0xFF8C8FA1),
+    blue: Color(0xFF1E66F5),
+    lavender: Color(0xFF7287FD),
+    sapphire: Color(0xFF209FB5),
+    green: Color(0xFF40A02B),
+    yellow: Color(0xFFDF8E1D),
+    peach: Color(0xFFFE640B),
+    red: Color(0xFFD20F39),
+    mauve: Color(0xFF8839EF),
+    teal: Color(0xFF179299),
+    pink: Color(0xFFEA76CB),
+  );
+
+  /// 霓虹夜（Tokyo Night 风，高饱和彩色，深蓝底 + 鲜亮强调色）
+  static const neon = AppPalette(
+    id: 'neon',
+    nameZh: '霓虹夜',
+    nameEn: 'Neon Night',
+    brightness: Brightness.dark,
+    base: Color(0xFF1A1B26),
+    mantle: Color(0xFF16161E),
+    crust: Color(0xFF0F0F17),
+    surface0: Color(0xFF2A2E45),
+    surface1: Color(0xFF3B4261),
+    surface2: Color(0xFF545C7E),
+    text: Color(0xFFC0CAF5),
+    subtext: Color(0xFF9AA5CE),
+    overlay: Color(0xFF565F89),
+    blue: Color(0xFF7AA2F7),
+    lavender: Color(0xFFBB9AF7),
+    sapphire: Color(0xFF2AC3DE),
+    green: Color(0xFF9ECE6A),
+    yellow: Color(0xFFE0AF68),
+    peach: Color(0xFFFF9E64),
+    red: Color(0xFFF7768E),
+    mauve: Color(0xFFBB9AF7),
+    teal: Color(0xFF73DACA),
+    pink: Color(0xFFFF75A0),
+  );
+
+  /// 樱桃亮（高对比亮色，白底 + 鲜艳强调色，彩色边框感强）
+  static const cherry = AppPalette(
+    id: 'cherry',
+    nameZh: '樱桃亮',
+    nameEn: 'Cherry Light',
+    brightness: Brightness.light,
+    base: Color(0xFFFFFFFF),
+    mantle: Color(0xFFF6F2F8),
+    crust: Color(0xFFEDE7F0),
+    surface0: Color(0xFFE0D4E7),
+    surface1: Color(0xFFCBB8D6),
+    surface2: Color(0xFFB199C2),
+    text: Color(0xFF2D1B33),
+    subtext: Color(0xFF5C476B),
+    overlay: Color(0xFF8A7397),
+    blue: Color(0xFF2563EB),
+    lavender: Color(0xFF7C3AED),
+    sapphire: Color(0xFF0891B2),
+    green: Color(0xFF16A34A),
+    yellow: Color(0xFFCA8A04),
+    peach: Color(0xFFEA580C),
+    red: Color(0xFFDC2626),
+    mauve: Color(0xFF9333EA),
+    teal: Color(0xFF0D9488),
+    pink: Color(0xFFDB2777),
+  );
+
+  /// 全部内置方案，按显示顺序
+  static const all = [mocha, macchiato, frappe, latte, neon, cherry];
+
+  /// 按 id 取，找不到回退 Mocha
+  static AppPalette byId(String? id) =>
+      all.firstWhere((p) => p.id == id, orElse: () => mocha);
+}
diff --git a/clients/app/lib/core/settings_store.dart b/clients/app/lib/core/settings_store.dart
@@ -14,6 +14,9 @@ enum CursorStyle { block, underline, bar }
 class AppSettings {
   final AppLang lang;
 
+  // 外观
+  final String themeId; //        配色方案 id（见 palette.dart）
+
   // 终端设置（xterm 真实支持项）
   final double termFontSize; //   字号
   final bool selectToCopy; //     选中即复制
@@ -23,6 +26,7 @@ class AppSettings {
 
   const AppSettings({
     this.lang = AppLang.zh,
+    this.themeId = 'mocha',
     this.termFontSize = 12.5,
     this.selectToCopy = true,
     this.rightClickPaste = true,
@@ -32,6 +36,7 @@ class AppSettings {
 
   factory AppSettings.fromJson(Map<String, dynamic> j) => AppSettings(
         lang: (j['lang'] as String?) == 'en' ? AppLang.en : AppLang.zh,
+        themeId: j['themeId'] as String? ?? 'mocha',
         termFontSize: (j['termFontSize'] as num?)?.toDouble() ?? 12.5,
         selectToCopy: j['selectToCopy'] as bool? ?? true,
         rightClickPaste: j['rightClickPaste'] as bool? ?? true,
@@ -45,6 +50,7 @@ class AppSettings {
 
   Map<String, dynamic> toJson() => {
         'lang': lang == AppLang.en ? 'en' : 'zh',
+        'themeId': themeId,
         'termFontSize': termFontSize,
         'selectToCopy': selectToCopy,
         'rightClickPaste': rightClickPaste,
@@ -54,6 +60,7 @@ class AppSettings {
 
   AppSettings copyWith({
     AppLang? lang,
+    String? themeId,
     double? termFontSize,
     bool? selectToCopy,
     bool? rightClickPaste,
@@ -62,6 +69,7 @@ class AppSettings {
   }) =>
       AppSettings(
         lang: lang ?? this.lang,
+        themeId: themeId ?? this.themeId,
         termFontSize: termFontSize ?? this.termFontSize,
         selectToCopy: selectToCopy ?? this.selectToCopy,
         rightClickPaste: rightClickPaste ?? this.rightClickPaste,