Make the Rust client the sole app

app/src/bin_desktop.rs

@@ -0,0 +1,9 @@
+use ai_app::desktop::{app, startup};
+
+fn main() {
+    if let Err(e) = startup::load_startup_config() {
+        eprintln!("desktop-app: {e}");
+        std::process::exit(2);
+    }
+    app::run();
+}