Merge upstream main into shared virtual NIC work

Port shared TUN ownership, routing, mobile source dispatch, and
Magic DNS route claims onto the native runtime-host architecture.

Preserve per-member lifecycle and add focused desktop, mobile, netlink,
GUI, FFI, and root integration validation for the merged code.

easytier-contrib/easytier-ffi/Cargo.toml

@@ -9,21 +9,26 @@ crate-type = ["cdylib", "rlib"]
 [features]
 default = ["c-abi", "ffi-dataplane"]
 c-abi = []
-ffi-dataplane = ["easytier/ffi-dataplane"]
+ffi-dataplane = [
+    "easytier/ffi-dataplane",
+    "easytier-core/proxy-smoltcp-stack",
+]
 macos-ne = ["easytier/macos-ne"]
 
 [dependencies]
-easytier = { path = "../../easytier" }
+easytier = { path = "../../easytier", features = ["tracing-log"] }
+easytier-core = { path = "../../easytier-core" }
 
 once_cell = "1.18.0"
-dashmap = "6.0"
 tokio = { version = "1", features = ["rt-multi-thread", "io-util", "time", "sync", "macros"] }
 async-trait = "0.1"
 log = "0.4"
-percent-encoding = "2.3"
-url = "2"
 
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1"
 uuid = "1.17.0"
-tokio-util = "0.7"
+
+[build-dependencies]
+thunk-rs = { git = "https://github.com/easytier/thunk.git", default-features = false, features = [
+    "win7",
+] }