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/backend/nomifun-realtime/src/lib.rs

@@ -0,0 +1,15 @@
+//! WebSocket connection manager, event broadcasting, and token-validated upgrade handler.
+pub mod broadcaster;
+pub mod handler;
+pub mod manager;
+pub mod router;
+pub mod types;
+
+pub use broadcaster::{BroadcastEventBus, EventBroadcaster};
+pub use handler::{TokenExtractor, WsHandlerState, ws_upgrade_handler};
+pub use manager::{TokenValidator, WebSocketManager};
+pub use router::{MessageRouter, NoopMessageRouter};
+pub use types::{
+    ClientInfo, ConnectionId, HEARTBEAT_INTERVAL, HEARTBEAT_TIMEOUT, PER_CONNECTION_BUFFER, WebSocketCloseCode,
+    WsOutbound,
+};