chore: release v1.0.18

移动端响应式适配（抽屉导航/列表卡片/弹窗自适应）、Android 正式签名与 APK 发布、
iOS(TestFlight) 工程与 CI、多平台构建流水线、相关文档同步。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

client/lib/widgets/searchable_option_field.dart

@@ -1,5 +1,6 @@
 import '../core/utils/dialog_util.dart';
 import 'package:flutter/material.dart';
+import '../core/responsive/responsive.dart';
 import 'package:lpinyin/lpinyin.dart';
 import '../core/theme/app_theme.dart';
 
@@ -135,7 +136,7 @@ class _SearchDialogState extends State<_SearchDialog> {
       title: Text(widget.title, style: const TextStyle(fontSize: 16)),
       contentPadding: const EdgeInsets.fromLTRB(16, 12, 16, 0),
       content: SizedBox(
-        width: 300,
+        width: context.dialogWidth(300),
         height: 400,
         child: Column(
           children: [