feat: implement TS3 protocol layer, session management, and ServerQuery client

- Add real X25519 ECDH key exchange for initivexpand2 bootstrap
- Add P-256 identity key generation with TeamSpeak tomcrypt format
- Add session event loop with tokio::select! for packet/command handling
- Add ServerQuery TCP client with typed parsing (channels, clients, permissions)
- Add Tauri commands: connect (session-based), join_channel, send_message, disconnect
- Add frontend ServerQuery snapshot panel
- Fix CI: Node 22, rustup setup, npm install, workspace checks
- Add mock UDP handshake tests through initserver
- 54 tests passing across shared, tscore, tsaudio, tsdb

src/Cargo.toml

@@ -5,6 +5,7 @@ members = [
     "tsaudio", 
     "tsdb",
     "shared",
+    "tauri-app/src-tauri",
 ]
 
 [workspace.package]
@@ -29,9 +30,10 @@ aes = "0.8"
 eax = "0.5"
 sha1 = "0.10"
 sha2 = "0.10"
-p256 = { version = "0.13", features = ["ecdh"] }
+p256 = { version = "0.13", features = ["ecdh", "ecdsa"] }
 curve25519-dalek-ng = "4"
 num-bigint = "0.4"
+simple_asn1 = "0.6"
 
 quicklz = "0.1"