添加本地C++服务集成功能，在保存NUT文件时发送文件路径和内容到本地服务

- 新增localClient.ts模块，用于向本地HTTP服务发送文件数据
- 修改extension.ts，在文件保存时调用本地服务发送功能
- 实现与C++客户端示例兼容的JSON数据格式

🤖 Generated with [Claude Code](https://claude.ai/code)

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

src/localClient.ts

@@ -0,0 +1,65 @@
+import * as http from 'http';
+import * as vscode from 'vscode';
+
+/**
+ * 构建JSON数据
+ * @param filePath 文件路径
+ * @param content 文件内容
+ * @returns JSON字符串
+ */
+function buildJsonData(filePath: string, content: string): string {
+    const data: { [key: string]: string } = {};
+    data[filePath] = content;
+
+    return JSON.stringify(data);
+}
+
+/**
+ * 发送文件内容到本地C++服务
+ * @param filePath 文件路径
+ * @param content 文件内容
+ * @returns Promise<boolean> 是否发送成功
+ */
+export async function sendFileToCppService(filePath: string, content: string): Promise<boolean> {
+    return new Promise((resolve) => {
+        const jsonData = buildJsonData(filePath, content);
+        const postData = jsonData;
+
+        const options: http.RequestOptions = {
+            hostname: '127.0.0.1',
+            port: 26000,
+            path: '/send_data',
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                'Content-Length': Buffer.byteLength(postData)
+            }
+        };
+
+        const req = http.request(options, (res) => {
+            let data = '';
+
+            res.on('data', (chunk) => {
+                data += chunk;
+            });
+
+            res.on('end', () => {
+                console.log(`[Squirrel] 已发送文件到C++服务: ${filePath}, 状态码: ${res.statusCode}`);
+                if (res.statusCode === 200) {
+                    resolve(true);
+                } else {
+                    console.error(`[Squirrel] 发送失败，状态码: ${res.statusCode}, 响应: ${data}`);
+                    resolve(false);
+                }
+            });
+        });
+
+        req.on('error', (error) => {
+            console.error(`[Squirrel] 发送文件到C++服务失败: ${error.message}`);
+            resolve(false);
+        });
+
+        req.write(postData);
+        req.end();
+    });
+}