新增: MCP HTTP transport + 系统托盘 + 实体解析(会话前基线收尾)

- df-mcp 加 streamable HTTP transport 层(axum 0.7 + tower,server_http.rs),lib.rs pub mod 接线

- src-tauri 加 mcp.rs(spawn_mcp_http + mcp_get_status IPC + mcp-server CLI)+ tray.rs(系统托盘 show_main/setup_tray),lib.rs 集成 + main.rs mcp-server 参数路由

- AI 工具加 entity_resolve.rs(实体解析,tools/mod.rs pub mod 接线)

src-tauri/Cargo.toml

@@ -13,10 +13,13 @@ crate-type = ["staticlib", "cdylib", "rlib"]
 tauri-build = { version = "2", features = [] }
 
 [dependencies]
-tauri = { version = "2", features = [] }
+# Phase3 桌面内嵌 HTTP MCP server + 托盘常驻:tray-icon feature 非默认,必须显式启用
+tauri = { version = "2", features = ["tray-icon"] }
 tauri-plugin-dialog = "2"
 tauri-plugin-opener = "2"
 tauri-plugin-window-state = "2"
+# Phase3 单实例:二次启动唤起已有进程主窗口,防多实例抢 18765 端口
+tauri-plugin-single-instance = "2"
 serde.workspace = true
 serde_json.workspace = true
 tokio.workspace = true