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/crates/shared/README.md

@@ -0,0 +1,14 @@
+# crates/shared
+
+Cross-layer Rust crates used by both the `agent` and `backend` groups.
+
+Current crates:
+
+| Crate | Role |
+| --- | --- |
+| `nomifun-net` | Shared outbound HTTP client/proxy behavior. |
+| `nomi-redact` | Shared redaction helpers for sensitive text. |
+
+`crates/shared/*` is part of the workspace membership in the root
+`Cargo.toml`. Add a crate here only when it genuinely belongs on both sides of
+the backend/agent boundary; otherwise keep it in the owning group.