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)

Cargo.lock

@@ -872,6 +872,7 @@ dependencies = [
  "tauri-build",
  "tauri-plugin-dialog",
  "tauri-plugin-opener",
+ "tauri-plugin-single-instance",
  "tauri-plugin-window-state",
  "tokio",
  "tracing",
@@ -949,6 +950,7 @@ name = "df-mcp"
 version = "0.1.0"
 dependencies = [
  "anyhow",
+ "axum",
  "df-nodes",
  "df-storage",
  "df-types",
@@ -956,6 +958,7 @@ dependencies = [
  "serde",
  "serde_json",
  "tokio",
+ "tower",
  "tracing",
  "uuid",
 ]
@@ -4666,6 +4669,22 @@ dependencies = [
  "zbus 5.16.0",
 ]
 
+[[package]]
+name = "tauri-plugin-single-instance"
+version = "2.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b3214becf9ef5783c0ae99a3bb25adf5353a7a16ebf53e74b909e29205735c6c"
+dependencies = [
+ "serde",
+ "serde_json",
+ "tauri",
+ "thiserror 2.0.18",
+ "tokio",
+ "tracing",
+ "windows-sys 0.60.2",
+ "zbus 5.16.0",
+]
+
 [[package]]
 name = "tauri-plugin-window-state"
 version = "2.4.1"