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/select_product_dialog.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import '../core/responsive/responsive.dart';
 import 'package:lpinyin/lpinyin.dart';
 import '../models/product.dart';
 
@@ -69,7 +70,7 @@ class _SelectProductDialogState extends State<SelectProductDialog> {
     return Dialog(
       shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(12)),
       child: SizedBox(
-        width: 480,
+        width: context.dialogWidth(480),
         child: Column(
           mainAxisSize: MainAxisSize.min,
           crossAxisAlignment: CrossAxisAlignment.stretch,