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/CHANGELOG.md

@@ -0,0 +1,24 @@
+# Changelog
+
+NomiFun is pre-1.0. Until the first public release, this file records release
+notes at a high level rather than a complete historical log.
+
+## Unreleased
+
+- Documentation overhaul for public website and open-source preparation.
+- Clarified desktop, web, remote access, AutoWork, scheduled tasks, and
+  packaging documentation.
+- Removed proprietary PDF skill assets from the bundled built-in skills.
+
+## Release Note Policy
+
+Every public release should include:
+
+- User-facing changes.
+- Breaking configuration or data migration notes.
+- Security-relevant changes.
+- Packaging and updater notes.
+- Known limitations.
+
+Use calendar dates or semantic versions consistently once public releases
+begin.