feat: 添加完整的单元测试套件

- 新增 vitest 测试框架配置
- 添加 54 个测试文件，共 951 个测试用例
- 覆盖核心模块：
  - Agent: executor, registry, config-loader, permission-merger
  - Context: manager, compaction, prune, token-counter
  - Permission: manager, bash/file/git/web checkers, wildcard
  - Session: manager, storage
  - Tools: filesystem (12个), git (10个), web, shell, todo, task
  - LSP: client, server, language
  - Utils: config, diff
  - UI: terminal

tests/unit/lsp/server.test.ts

@@ -0,0 +1,195 @@
+import { describe, it, expect } from 'vitest';
+import {
+  getServerConfig,
+  hasServerConfig,
+  getSupportedLanguages,
+  getAllServerConfigs,
+  getUniqueServers,
+} from '../../../src/lsp/server.js';
+
+describe('LSP Server - 语言服务器配置', () => {
+  describe('getServerConfig - 获取服务器配置', () => {
+    it('返回 TypeScript 配置', () => {
+      const config = getServerConfig('typescript');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('typescript-language-server');
+      expect(config?.args).toContain('--stdio');
+      expect(config?.displayName).toBe('TypeScript');
+    });
+
+    it('返回 JavaScript 配置（共用 TypeScript）', () => {
+      const config = getServerConfig('javascript');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('typescript-language-server');
+    });
+
+    it('返回 Python 配置', () => {
+      const config = getServerConfig('python');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('pyright-langserver');
+      expect(config?.install.npm).toBe('pyright');
+    });
+
+    it('返回 Go 配置', () => {
+      const config = getServerConfig('go');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('gopls');
+      expect(config?.install.go).toContain('gopls');
+    });
+
+    it('返回 Rust 配置', () => {
+      const config = getServerConfig('rust');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('rust-analyzer');
+      expect(config?.install.rustup).toBe('rust-analyzer');
+    });
+
+    it('返回 C/C++ 配置', () => {
+      const cConfig = getServerConfig('c');
+      const cppConfig = getServerConfig('cpp');
+
+      expect(cConfig?.command).toBe('clangd');
+      expect(cppConfig?.command).toBe('clangd');
+    });
+
+    it('返回 Vue 配置', () => {
+      const config = getServerConfig('vue');
+
+      expect(config).toBeDefined();
+      expect(config?.command).toBe('vue-language-server');
+    });
+
+    it('返回 HTML/CSS/JSON 配置', () => {
+      expect(getServerConfig('html')?.command).toBe('vscode-html-language-server');
+      expect(getServerConfig('css')?.command).toBe('vscode-css-language-server');
+      expect(getServerConfig('json')?.command).toBe('vscode-json-language-server');
+    });
+
+    it('不支持的语言返回 undefined', () => {
+      const config = getServerConfig('unknown' as any);
+
+      expect(config).toBeUndefined();
+    });
+  });
+
+  describe('hasServerConfig - 检查服务器配置', () => {
+    it('已配置的语言返回 true', () => {
+      expect(hasServerConfig('typescript')).toBe(true);
+      expect(hasServerConfig('python')).toBe(true);
+      expect(hasServerConfig('go')).toBe(true);
+      expect(hasServerConfig('rust')).toBe(true);
+    });
+
+    it('未配置的语言返回 false', () => {
+      expect(hasServerConfig('unknown' as any)).toBe(false);
+    });
+  });
+
+  describe('getSupportedLanguages - 获取支持的语言', () => {
+    it('返回所有支持的语言 ID', () => {
+      const languages = getSupportedLanguages();
+
+      expect(Array.isArray(languages)).toBe(true);
+      expect(languages.length).toBeGreaterThan(0);
+      expect(languages).toContain('typescript');
+      expect(languages).toContain('javascript');
+      expect(languages).toContain('python');
+      expect(languages).toContain('go');
+      expect(languages).toContain('rust');
+    });
+  });
+
+  describe('getAllServerConfigs - 获取所有配置', () => {
+    it('返回所有服务器配置对象', () => {
+      const configs = getAllServerConfigs();
+
+      expect(typeof configs).toBe('object');
+      expect(configs.typescript).toBeDefined();
+      expect(configs.python).toBeDefined();
+    });
+  });
+
+  describe('getUniqueServers - 获取唯一服务器列表', () => {
+    it('返回去重后的服务器列表', () => {
+      const servers = getUniqueServers();
+
+      expect(Array.isArray(servers)).toBe(true);
+
+      // typescript-language-server 被多个语言共用
+      const tsServer = servers.find((s) => s.id === 'typescript-language-server');
+      expect(tsServer).toBeDefined();
+      expect(tsServer?.languages).toContain('typescript');
+      expect(tsServer?.languages).toContain('javascript');
+    });
+
+    it('每个服务器包含必要字段', () => {
+      const servers = getUniqueServers();
+
+      for (const server of servers) {
+        expect(server.id).toBeDefined();
+        expect(server.config).toBeDefined();
+        expect(server.languages).toBeDefined();
+        expect(Array.isArray(server.languages)).toBe(true);
+        expect(server.languages.length).toBeGreaterThan(0);
+      }
+    });
+
+    it('clangd 被 C 和 C++ 共用', () => {
+      const servers = getUniqueServers();
+      const clangd = servers.find((s) => s.id === 'clangd');
+
+      expect(clangd).toBeDefined();
+      expect(clangd?.languages).toContain('c');
+      expect(clangd?.languages).toContain('cpp');
+    });
+
+    it('vscode-css-language-server 被 CSS/SCSS/Less 共用', () => {
+      const servers = getUniqueServers();
+      const cssServer = servers.find((s) => s.id === 'vscode-css-language-server');
+
+      expect(cssServer).toBeDefined();
+      expect(cssServer?.languages).toContain('css');
+      expect(cssServer?.languages).toContain('scss');
+      expect(cssServer?.languages).toContain('less');
+    });
+  });
+
+  describe('安装配置', () => {
+    it('TypeScript 服务器有 npm 安装配置', () => {
+      const config = getServerConfig('typescript');
+
+      expect(config?.install.npm).toContain('typescript-language-server');
+    });
+
+    it('Python 服务器有多种安装方式', () => {
+      const config = getServerConfig('python');
+
+      expect(config?.install.npm).toBe('pyright');
+      expect(config?.install.pip).toBe('pyright');
+    });
+
+    it('Go 服务器有 go install 配置', () => {
+      const config = getServerConfig('go');
+
+      expect(config?.install.go).toContain('gopls');
+    });
+
+    it('Rust 服务器有 rustup 和 brew 安装配置', () => {
+      const config = getServerConfig('rust');
+
+      expect(config?.install.rustup).toBe('rust-analyzer');
+      expect(config?.install.brew).toBe('rust-analyzer');
+    });
+
+    it('Ruby 服务器有 gem 安装配置', () => {
+      const config = getServerConfig('ruby');
+
+      expect(config?.install.gem).toBe('solargraph');
+    });
+  });
+});