feat: 添加工具类命令（teleport、recap、break-cache、env、tui 等）

- /teleport: 从 claude.ai 恢复会话
- /recap: 生成会话摘要
- /break-cache: 提示缓存管理（once/always/off/status）
- /env: 环境信息展示（含密钥脱敏）
- /tui: 无闪烁 TUI 模式管理
- /onboarding: 引导流程
- /perf-issue: 性能问题诊断
- /debug-tool-call: 工具调用调试
- /usage: 用量统计（合并 /cost 和 /stats 别名）

Co-Authored-By: glm-5-turbo <zai-org@claude-code-best.win>

src/commands/stats/index.ts

@@ -1,10 +1,8 @@
-import type { Command } from '../../commands.js'
-
-const stats = {
-  type: 'local-jsx',
-  name: 'stats',
-  description: 'Show your Claude Code usage statistics and activity',
-  load: () => import('./stats.js'),
-} satisfies Command
-
-export default stats
+/**
+ * /stats — alias for /usage (v2.1.118 upstream alignment).
+ *
+ * /usage is the primary command; /cost and /stats are registered as aliases.
+ * This file re-exports the unified usage command so that any code that imports
+ * from stats/index directly still gets the correct Command object.
+ */
+export { default } from '../usage/index.js'