feat: Enhance copy_env_file to support directory and destination path

.gitignore

@@ -1 +1,7 @@
-.DS_Store
+.DS_Store
+
+# Local OMX session artifacts
+.omx/
+findings.md
+progress.md
+task_plan.md

README.md

@@ -42,6 +42,11 @@ wt add 3000
 # - Installs dependencies
 # - Starts dev server on port 3000
 
+# Names with trailing digits also set the dev PORT
+wt add ui9083
+# - Creates branch feat/ui9083
+# - Starts the configured dev command with PORT=9083
+
 # 3. Navigate between worktrees
 wt 3000    # Jump to feature worktree
 wt main    # Return to main repository
@@ -97,9 +102,15 @@ wt rm 3000
 | `wt lang`      | Set CLI language (en/zh)     | `wt lang set zh` |
 | `wt theme`     | Switch `wt list` theme (`box`\|`sage`\|`archer`) | `wt theme set box` |
 | `wt help`      | Show command reference       | `wt help`        |
+| `wt help <command>` | Show subcommand help     | `wt help add`    |
 | `wt reinstall` | Update to latest version     | `wt reinstall`   |
 | `wt uninstall` | Remove worktree.sh           | `wt uninstall`   |
 
+## Help and Naming Rules
+
+- Every core command supports `wt <command> --help`, and `wt help <command>` is the equivalent long form.
+- `wt add <name>` uses trailing digits as the dev `PORT`. For example, `wt add ui9083` keeps the worktree name `ui9083`, creates branch `feat/ui9083`, and runs the configured dev command with `PORT=9083`.
+
 ## Advanced Features
 
 ### Broadcasting Changes Across Worktrees

README.zh-CN.md

@@ -42,6 +42,11 @@ wt add 3000
 # - 安装依赖
 # - 在端口 3000 上启动开发服务器
 
+# 名称以数字结尾时，也会把这些数字当作 dev PORT
+wt add ui9083
+# - 创建分支 feat/ui9083
+# - 以 PORT=9083 启动配置好的 dev 命令
+
 # 3. 在 worktree 之间导航
 wt 3000    # 跳转到功能 worktree
 wt main    # 返回主仓库
@@ -97,9 +102,15 @@ wt rm 3000
 | `wt lang`      | 设置 CLI 语言（en/zh）                         | `wt lang set zh`   |
 | `wt theme`     | 切换 `wt list` 主题（`box`\|`sage`\|`archer`） | `wt theme set box` |
 | `wt help`      | 显示命令参考                                   | `wt help`          |
+| `wt help <command>` | 显示子命令帮助                           | `wt help add`      |
 | `wt reinstall` | 更新到最新版本                                 | `wt reinstall`     |
 | `wt uninstall` | 删除 worktree.sh                               | `wt uninstall`     |
 
+## Help 与命名规则
+
+- 所有核心命令都支持 `wt <command> --help`，而 `wt help <command>` 是等价的长写法。
+- `wt add <name>` 会把名称末尾的数字当作 dev `PORT`。例如 `wt add ui9083` 会保留 worktree 名称 `ui9083`、创建分支 `feat/ui9083`，并以 `PORT=9083` 启动已配置的 dev 命令。
+
 ## 高级功能
 
 ### 跨 Worktree 广播更改