fix: character encoding corruption when executing the /copy command on Windows. (#1069)

Co-authored-by: linda <hxn@163.com>

Author: citlalinda

packages/cli/src/ui/utils/commandUtils.test.ts

@@ -13,6 +13,7 @@ import {
   isSlashCommand,
   copyToClipboard,
   getUrlOpenCommand,
+  CodePage,
 } from './commandUtils.js';
 
 // Mock child_process
@@ -188,7 +189,10 @@ describe('commandUtils', () => {
 
         await copyToClipboard(testText);
 
-        expect(mockSpawn).toHaveBeenCalledWith('clip', []);
+        expect(mockSpawn).toHaveBeenCalledWith('cmd', [
+          '/c',
+          `chcp ${CodePage.UTF8} >nul && clip`,
+        ]);
         expect(mockChild.stdin.write).toHaveBeenCalledWith(testText);
         expect(mockChild.stdin.end).toHaveBeenCalled();
       });

packages/cli/src/ui/utils/commandUtils.ts

@@ -7,6 +7,23 @@
 import type { SpawnOptions } from 'node:child_process';
 import { spawn } from 'node:child_process';
 
+/**
+ * Common Windows console code pages (CP) used for encoding conversions.
+ *
+ * @remarks
+ * - `UTF8` (65001): Unicode (UTF-8) — recommended for cross-language scripts.
+ * - `GBK` (936): Simplified Chinese — default on most Chinese Windows systems.
+ * - `BIG5` (950): Traditional Chinese.
+ * - `LATIN1` (1252): Western European — default on many Western systems.
+ */
+export const CodePage = {
+  UTF8: 65001,
+  GBK: 936,
+  BIG5: 950,
+  LATIN1: 1252,
+} as const;
+
+export type CodePage = (typeof CodePage)[keyof typeof CodePage];
 /**
  * Checks if a query string potentially represents an '@' command.
  * It triggers if the query starts with '@' or contains '@' preceded by whitespace
@@ -80,7 +97,7 @@ export const copyToClipboard = async (text: string): Promise<void> => {
 
   switch (process.platform) {
     case 'win32':
-      return run('clip', []);
+      return run('cmd', ['/c', `chcp ${CodePage.UTF8} >nul && clip`]);
     case 'darwin':
       return run('pbcopy', []);
     case 'linux':