feat(cli): 添加 CLI 版本检测和会话验证功能

- 新增 CLI 版本检测功能，支持检测 CLI 版本并缓存结果
- 实现会话验证方法，用于检查当前会话是否有效
- 在连接处理中集成 CLI 版本检测和会话验证逻辑
- 优化 WebViewProvider 中的初始化流程，支持背景初始化
- 更新消息处理逻辑，增加与 CLI 相关的错误处理

packages/vscode-ide-companion/src/utils/CliInstaller.ts

@@ -5,7 +5,7 @@
  */
 
 import * as vscode from 'vscode';
-import { CliDetector } from './cliDetector.js';
+import { CliDetector } from '../cli/cliDetector.js';
 
 /**
  * CLI Detection and Installation Handler

packages/vscode-ide-companion/src/utils/cliDetector.ts

@@ -1,129 +0,0 @@
-/**
- * @license
- * Copyright 2025 Qwen Team
- * SPDX-License-Identifier: Apache-2.0
- */
-
-import { exec } from 'child_process';
-import { promisify } from 'util';
-
-const execAsync = promisify(exec);
-
-export interface CliDetectionResult {
-  isInstalled: boolean;
-  cliPath?: string;
-  version?: string;
-  error?: string;
-}
-
-/**
- * Detects if Qwen Code CLI is installed and accessible
- */
-export class CliDetector {
-  private static cachedResult: CliDetectionResult | null = null;
-  private static lastCheckTime: number = 0;
-  private static readonly CACHE_DURATION_MS = 30000; // 30 seconds
-
-  /**
-   * Checks if the Qwen Code CLI is installed
-   * @param forceRefresh - Force a new check, ignoring cache
-   * @returns Detection result with installation status and details
-   */
-  static async detectQwenCli(
-    forceRefresh = false,
-  ): Promise<CliDetectionResult> {
-    const now = Date.now();
-
-    // Return cached result if available and not expired
-    if (
-      !forceRefresh &&
-      this.cachedResult &&
-      now - this.lastCheckTime < this.CACHE_DURATION_MS
-    ) {
-      return this.cachedResult;
-    }
-
-    try {
-      const isWindows = process.platform === 'win32';
-      const whichCommand = isWindows ? 'where' : 'which';
-
-      // Check if qwen command exists
-      try {
-        const { stdout } = await execAsync(`${whichCommand} qwen`, {
-          timeout: 5000,
-        });
-        const cliPath = stdout.trim().split('\n')[0];
-
-        // Try to get version
-        let version: string | undefined;
-        try {
-          const { stdout: versionOutput } = await execAsync('qwen --version', {
-            timeout: 5000,
-          });
-          version = versionOutput.trim();
-        } catch {
-          // Version check failed, but CLI is installed
-        }
-
-        this.cachedResult = {
-          isInstalled: true,
-          cliPath,
-          version,
-        };
-        this.lastCheckTime = now;
-        return this.cachedResult;
-      } catch (_error) {
-        // CLI not found
-        this.cachedResult = {
-          isInstalled: false,
-          error: `Qwen Code CLI not found in PATH. Please install it using: npm install -g @qwen-code/qwen-code@latest`,
-        };
-        this.lastCheckTime = now;
-        return this.cachedResult;
-      }
-    } catch (error) {
-      const errorMessage =
-        error instanceof Error ? error.message : String(error);
-      this.cachedResult = {
-        isInstalled: false,
-        error: `Failed to detect Qwen Code CLI: ${errorMessage}`,
-      };
-      this.lastCheckTime = now;
-      return this.cachedResult;
-    }
-  }
-
-  /**
-   * Clears the cached detection result
-   */
-  static clearCache(): void {
-    this.cachedResult = null;
-    this.lastCheckTime = 0;
-  }
-
-  /**
-   * Gets installation instructions based on the platform
-   */
-  static getInstallationInstructions(): {
-    title: string;
-    steps: string[];
-    documentationUrl: string;
-  } {
-    return {
-      title: 'Qwen Code CLI is not installed',
-      steps: [
-        'Install via npm:',
-        '  npm install -g @qwen-code/qwen-code@latest',
-        '',
-        'Or install from source:',
-        '  git clone https://github.com/QwenLM/qwen-code.git',
-        '  cd qwen-code',
-        '  npm install',
-        '  npm install -g .',
-        '',
-        'After installation, reload VS Code or restart the extension.',
-      ],
-      documentationUrl: 'https://github.com/QwenLM/qwen-code#installation',
-    };
-  }
-}