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/permission/bash-parser.test.ts

@@ -0,0 +1,163 @@
+import { describe, it, expect } from 'vitest';
+import { parseCommandSimple } from '../../../src/permission/bash-parser.js';
+
+// 注意：parseBashCommand 需要初始化 tree-sitter wasm，在单元测试中使用 parseCommandSimple
+
+describe('parseCommandSimple - 简单命令解析', () => {
+  describe('基本命令解析', () => {
+    it('解析单个命令', () => {
+      const result = parseCommandSimple('ls');
+
+      expect(result.name).toBe('ls');
+      expect(result.subcommand).toBeUndefined();
+      expect(result.args).toEqual([]);
+      expect(result.text).toBe('ls');
+    });
+
+    it('解析带子命令的命令', () => {
+      const result = parseCommandSimple('git status');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('status');
+      expect(result.args).toEqual([]);
+    });
+
+    it('解析带参数的命令', () => {
+      const result = parseCommandSimple('git commit -m "message"');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('commit');
+      expect(result.args).toContain('-m');
+    });
+
+    it('解析带 flag 前缀的子命令', () => {
+      const result = parseCommandSimple('rm -rf node_modules');
+
+      expect(result.name).toBe('rm');
+      // -rf 以 - 开头，所以 node_modules 是第一个非 flag 参数
+      expect(result.subcommand).toBe('node_modules');
+      expect(result.args).toContain('-rf');
+    });
+  });
+
+  describe('flag 和参数分离', () => {
+    it('短 flag 放入 args', () => {
+      const result = parseCommandSimple('ls -la');
+
+      expect(result.name).toBe('ls');
+      expect(result.subcommand).toBeUndefined();
+      expect(result.args).toContain('-la');
+    });
+
+    it('长 flag 放入 args', () => {
+      const result = parseCommandSimple('npm install --save-dev');
+
+      expect(result.name).toBe('npm');
+      expect(result.subcommand).toBe('install');
+      expect(result.args).toContain('--save-dev');
+    });
+
+    it('混合 flag 和参数', () => {
+      const result = parseCommandSimple('git checkout -b feature-branch');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('checkout');
+      expect(result.args).toContain('-b');
+      expect(result.args).toContain('feature-branch');
+    });
+  });
+
+  describe('空白处理', () => {
+    it('处理前后空格', () => {
+      const result = parseCommandSimple('  git status  ');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('status');
+    });
+
+    it('处理多个空格分隔', () => {
+      const result = parseCommandSimple('git   status    -v');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('status');
+      expect(result.args).toContain('-v');
+    });
+
+    it('空字符串返回空命令', () => {
+      const result = parseCommandSimple('');
+
+      expect(result.name).toBe('');
+      expect(result.subcommand).toBeUndefined();
+      expect(result.args).toEqual([]);
+    });
+
+    it('只有空格返回空命令', () => {
+      const result = parseCommandSimple('   ');
+
+      expect(result.name).toBe('');
+    });
+  });
+
+  describe('复杂命令', () => {
+    it('解析 git push 命令', () => {
+      const result = parseCommandSimple('git push origin main --force');
+
+      expect(result.name).toBe('git');
+      expect(result.subcommand).toBe('push');
+      expect(result.args).toContain('origin');
+      expect(result.args).toContain('main');
+      expect(result.args).toContain('--force');
+    });
+
+    it('解析 npm 命令', () => {
+      const result = parseCommandSimple('npm run build -- --watch');
+
+      expect(result.name).toBe('npm');
+      expect(result.subcommand).toBe('run');
+      expect(result.args).toContain('build');
+    });
+
+    it('解析 docker 命令', () => {
+      const result = parseCommandSimple('docker run -d -p 8080:80 nginx');
+
+      expect(result.name).toBe('docker');
+      expect(result.subcommand).toBe('run');
+      expect(result.args).toContain('-d');
+      expect(result.args).toContain('-p');
+    });
+
+    it('解析管道前的命令', () => {
+      // 简单解析不处理管道，只作为普通参数
+      const result = parseCommandSimple('cat file.txt');
+
+      expect(result.name).toBe('cat');
+      expect(result.subcommand).toBe('file.txt');
+    });
+  });
+
+  describe('保留原始文本', () => {
+    it('text 字段保留原始命令', () => {
+      const original = 'git commit -m "fix bug"';
+      const result = parseCommandSimple(original);
+
+      expect(result.text).toBe(original);
+    });
+  });
+});
+
+describe('ParsedCommand 结构', () => {
+  it('包含所有必要字段', () => {
+    const result = parseCommandSimple('git push');
+
+    expect(result).toHaveProperty('name');
+    expect(result).toHaveProperty('subcommand');
+    expect(result).toHaveProperty('args');
+    expect(result).toHaveProperty('text');
+  });
+
+  it('args 始终是数组', () => {
+    const result = parseCommandSimple('ls');
+
+    expect(Array.isArray(result.args)).toBe(true);
+  });
+});