Make it run in browser

gui/src/runtime.rs

@@ -0,0 +1,20 @@
+#[cfg(not(target_arch = "wasm32"))]
+use std::sync::LazyLock;
+
+#[cfg(not(target_arch = "wasm32"))]
+pub static RT: LazyLock<tokio::runtime::Runtime> = LazyLock::new(|| {
+    tokio::runtime::Builder::new_multi_thread()
+        .enable_all()
+        .build()
+        .expect("Failed to initialize tokio runtime")
+});
+
+#[cfg(not(target_arch = "wasm32"))]
+pub fn spawn(f: impl Future<Output = ()> + Send + 'static) {
+    RT.spawn(f);
+}
+
+#[cfg(target_arch = "wasm32")]
+pub fn spawn(f: impl Future<Output = ()> + 'static) {
+    wasm_bindgen_futures::spawn_local(f);
+}