refactor(components): remove md-commander widget

The journal now owns command history and tracking, so retire the md-commander widget. Its dice engine was extracted to src/components/dice in the previous commit.

Removes the custom element, tracker/command stores, completions, useCommander, Emmet parser, the doc entry, test fixtures, and the known-element catalog entry (reference docs regenerated).

BREAKING CHANGE: :md-commander is no longer a known element; content using it now fails tttk check with TTTK-D001.

docs/development.md

@@ -46,7 +46,6 @@ tttk/
 │   │   ├── md-table.tsx        # 表格组件
 │   │   ├── md-deck/            # 卡牌组件
 │   │   ├── md-pins.tsx         # 标记组件
-│   │   ├── md-commander/       # 命令追踪器
 │   │   ├── md-yarn-spinner.tsx # 叙事线组件
 
 │   │   ├── Article.tsx         # 文章组件

docs/markdown.md

@@ -461,36 +461,6 @@ data-config:
 :md-yarn-spinner[./story.yarn]
 ```
 
-
-
-### 📋 命令追踪器 (md-commander)
-
-支持命令历史和状态追踪。
-
-```markdown
-:md-commander
-```
-
-**追踪器命令：**
-
-```
-track npc#john.dwarf.warrior[hp=4/4 ac=15 name="John"]
-```
-
-**Emmet 简写语法：**
-
-- `#id` - 设置 ID
-- `.class` - 添加类别
-- `[attr=value]` - 设置属性
-
-**属性类型：**
-
-| 类型 | 格式 | 显示 |
-|------|------|------|
-| progress | `x/y` | 进度条 |
-| count | 整数 | 数字计数器 |
-| string | 文本 | 文本字段 |
-
 ## YAML 标签
 
 使用 ```yaml role=tag 代码块创建自定义标签（`yaml` 语言可被语法高亮）：

docs/mcp.md

@@ -335,8 +335,6 @@ MCP 服务器提供以下 Resources，包含 TTRPG Tools 的文档和参考材
   - `:md-table` - 表格组件
   - `:md-deck` - 卡牌组件
   - `:md-yarn-spinner` - 叙事线组件
-
-  - `:md-commander` - 命令追踪器
 - YAML 标签
 - Mermaid 图表
 - 警告/提示块

docs/reference.md

@@ -54,7 +54,6 @@ Nest with more colons (`::::`, `:::::`).
 | `:md-border` | color or border image | `width`, `slice` |
 | `:md-font` | font family | `source`, `weight`, `color` |
 | `:md-pins` | image path | `pins`, `fixed`, `labelStart` |
-| `:md-commander` | command template CSV | `placeholder`, `class`, `height` |
 | `:md-yarn-spinner` | Yarn Spinner file | `start` |
 
 ### `:md-dice`
@@ -205,19 +204,6 @@ Numbered markers on an image.
 :md-pins[./images/dungeon.png]{labelStart="1"}
 ```
 
-### `:md-commander`
-
-Interactive command history / tracker panel.
-
-The body is a CSV of command templates (`command,parameter,label,description,insertedText`).
-
-- Body: command template CSV
-- Attributes: `placeholder`, `class`, `height`
-
-```markdown
-:md-commander[./commands.csv]{placeholder="输入命令…" height="400px"}
-```
-
 ### `:md-yarn-spinner`
 
 Runs a Yarn Spinner dialogue file.