Update: 将子项目从 submodule 转为完整内容

- 移除 GovAI, nomifun-tauri, 算力盒子 的 submodule 引用
- 添加所有子项目的完整源代码
- 保留原始 .git 为 .git.bak 备份

nomifun-tauri/test-data/builtin-skills/mermaid/SKILL.md

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+---
+name: mermaid
+description: Render Mermaid diagrams as SVG or ASCII art using beautiful-mermaid. Use when users need to create flowcharts, sequence diagrams, state diagrams, class diagrams, or ER diagrams. Supports both graphical SVG output and terminal-friendly ASCII/Unicode output.
+---
+
+# Mermaid Diagram Renderer
+
+Render Mermaid diagrams using `beautiful-mermaid` library. Supports 5 diagram types with dual output modes.
+
+## Quick Start
+
+> Dependencies (`beautiful-mermaid`) auto-install on first run.
+
+### SVG Output (Default)
+
+```bash
+# From file
+npx tsx scripts/render.ts diagram.mmd --output diagram.svg
+
+# From stdin
+echo "graph LR; A-->B-->C" | npx tsx scripts/render.ts --stdin --output flow.svg
+```
+
+### ASCII Output (Terminal)
+
+```bash
+# ASCII art for terminal display
+npx tsx scripts/render.ts diagram.mmd --ascii
+
+# Pipe directly
+echo "graph TD; Start-->End" | npx tsx scripts/render.ts --stdin --ascii
+```
+
+Output example:
+
+```
+┌───────┐     ┌─────┐
+│ Start │────▶│ End │
+└───────┘     └─────┘
+```
+
+## Supported Diagrams
+
+| Type      | Syntax            | Best For                |
+| --------- | ----------------- | ----------------------- |
+| Flowchart | `graph TD/LR`     | Processes, decisions    |
+| Sequence  | `sequenceDiagram` | API calls, interactions |
+| State     | `stateDiagram-v2` | State machines          |
+| Class     | `classDiagram`    | OOP design              |
+| ER        | `erDiagram`       | Database schemas        |
+
+## Theming (SVG only)
+
+```bash
+npx tsx scripts/render.ts diagram.mmd --theme github-dark --output out.svg
+```
+
+Use invalid theme name to see available themes list (e.g., `--theme ?`)
+
+## Resources
+
+- `scripts/render.ts` - Main rendering script
+- `references/syntax.md` - Mermaid syntax quick reference