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/screens/auth/login_screen.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 
 import 'package:flutter/material.dart';
+import '../../core/responsive/responsive.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:go_router/go_router.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -125,7 +126,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
               borderRadius:
                   const BorderRadius.vertical(bottom: Radius.circular(4)),
               child: SizedBox(
-                width: 320,
+                width: context.dialogWidth(320),
                 child: ListView.separated(
                   padding: EdgeInsets.zero,
                   shrinkWrap: true,
@@ -263,7 +264,7 @@ class _LoginScreenState extends ConsumerState<LoginScreen> {
                     shape: RoundedRectangleBorder(
                         borderRadius: BorderRadius.circular(8)),
                     child: Container(
-                      width: 400,
+                      width: context.dialogWidth(400),
                       padding: const EdgeInsets.all(40),
                       child: Form(
                         key: _formKey,