Update core modules and add GUI panels

crates/xserial-gui/src/main.rs

@@ -1,3 +1,22 @@
+mod app;
+mod panels;
+
+use xserial_client::SessionManager;
+
 fn main() {
-    println!("xserial-gui");
+    tracing_subscriber::fmt()
+        .with_env_filter(tracing_subscriber::EnvFilter::from_default_env())
+        .init();
+
+    let rt = tokio::runtime::Runtime::new().expect("tokio runtime");
+    let _guard = rt.enter();
+
+    let mgr = SessionManager::new();
+    let rx = mgr.subscribe();
+
+    let _ = eframe::run_native(
+        "xserial",
+        eframe::NativeOptions::default(),
+        Box::new(|_cc| Ok(Box::new(app::XserialApp::new(mgr, rx)))),
+    );
 }