fix(client): Windows 热敏打印 GBK 编码改用 WideCharToMultiByte FFI

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -5,6 +5,11 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.53] - 2026-06-15
+
+### 修复
+- 修复 Windows 上点击打印无反应的问题（GBK 编码改为直接调用系统 API，不再依赖第三方插件）
+
 ## [1.0.52] - 2026-06-15
 
 ### 改进

client/lib/core/utils/print_util_stub.dart

@@ -14,7 +14,8 @@ import 'package:win32/win32.dart'
         EndPagePrinter,
         EndDocPrinter,
         ClosePrinter,
-        DOC_INFO_1;
+        DOC_INFO_1,
+        WideCharToMultiByte;
 import 'package:flutter/foundation.dart' show kIsWeb, debugPrint;
 import 'package:flutter/services.dart';
 import '../errors/error_reporter.dart';
@@ -266,12 +267,44 @@ Future<ui.Image> _renderLabelBitmap({
   return recorder.endRecording().toImage(sw, sh); // 返回 2× 图（640×320）
 }
 
+/// UTF-8 → GBK 字节：
+/// Windows 直接调 WideCharToMultiByte(936) FFI，无需插件；
+/// macOS 走 charset_converter（CoreFoundation 原生支持 GBK）。
+Uint8List _encodeGbk(String text) {
+  if (text.isEmpty) return Uint8List(0);
+  if (Platform.isWindows) {
+    final wideStr = text.toNativeUtf16();
+    try {
+      final needed = WideCharToMultiByte(936, 0, wideStr, -1, nullptr, 0, nullptr, nullptr);
+      if (needed <= 1) return Uint8List(0);
+      final buf = calloc<Uint8>(needed);
+      try {
+        WideCharToMultiByte(936, 0, wideStr, -1, buf.cast(), needed, nullptr, nullptr);
+        return Uint8List.fromList(buf.asTypedList(needed - 1)); // 不含 null 终止符
+      } finally {
+        calloc.free(buf);
+      }
+    } finally {
+      calloc.free(wideStr);
+    }
+  }
+  // macOS: charset_converter（同步 CoreFoundation）
+  // encode() 在 macOS 上是同步 channel 调用，此处以 Future.value 包装保持接口一致
+  throw UnsupportedError('call _encodeGbkAsync on macOS');
+}
+
+Future<Uint8List> _encodeGbkAsync(String text) async {
+  if (text.isEmpty) return Uint8List(0);
+  if (Platform.isWindows) return _encodeGbk(text);
+  return CharsetConverter.encode('GBK', text);
+}
+
 /// TSPL TEXT 命令辅助：将文本以 GBK 编码写入 BytesBuilder。
 /// TSS24.BF2/TSS16.BF2 是 TSC 固件内置简体中文点阵字体，需 GBK 编码。
 Future<void> _addTextCmd(
     BytesBuilder buf, int x, int y, String font, String text) async {
   if (text.isEmpty) return;
-  final gbk = await CharsetConverter.encode('GBK', text);
+  final gbk = await _encodeGbkAsync(text);
   buf.add(ascii.encode('TEXT $x,$y,"$font",0,1,1,"'));
   buf.add(gbk);
   buf.add(ascii.encode('"\r\n'));

client/pubspec.lock

@@ -521,10 +521,10 @@ packages:
     dependency: "direct main"
     description:
       name: path_provider
-      sha256: "50c5dd5b6e1aaf6fb3a78b33f6aa3afca52bf903a8a5298f53101fdaee55bbcd"
+      sha256: a7f4874f987173da295a61c181b8ee71dab59b332a486b391babf26a1b884825
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.5"
+    version: "2.1.6"
   path_provider_android:
     dependency: transitive
     description:
@@ -553,10 +553,10 @@ packages:
     dependency: transitive
     description:
       name: path_provider_platform_interface
-      sha256: "88f5779f72ba699763fa3a3b06aa4bf6de76c8e5de842cf6f29e2e06476c2334"
+      sha256: "484838772624c3a4b94f1e44a3e19897fee738f2d5c4ce448443b0417f7c9dda"
       url: "https://pub.dev"
     source: hosted
-    version: "2.1.2"
+    version: "2.1.3"
   path_provider_windows:
     dependency: transitive
     description:

client/pubspec.yaml

@@ -1,7 +1,7 @@
 name: jiu_client
 description: 酒库管理系统 - 酒店仓库管理
 publish_to: 'none'
-version: 1.0.3+1
+version: 1.0.52+1
 
 environment:
   sdk: '>=3.0.0 <4.0.0'