fix(hello-plugin): prévient le crash de l'asset protocol dans le runtime Tauri

- Ajoute block_on_protocol_future() pour éviter l'erreur 'Cannot start a runtime from within a runtime'
- Ajoute test unitaire pour vérifier la compatibilité avec le runtime Tauri
- Ajoute test d'intégration pour le hello-plugin du SDK

crates/app-tauri/src/plugins.rs

@@ -1,5 +1,6 @@
 //! Plugin Tauri commands and asset protocol.
 
+use std::future::Future;
 use std::path::{Path, PathBuf};
 
 use application::{ReviewPluginPackageInput, SetPluginEnabledInput, UninstallPluginInput};
@@ -178,7 +179,7 @@ fn plugin_asset_response(
     let rel =
         RelativePath::new(rel.to_owned()).map_err(|e| (StatusCode::BAD_REQUEST, e.to_string()))?;
     let state = app.state::<AppState>();
-    let allowed = tauri::async_runtime::block_on(asset_allowed(
+    let allowed = block_on_protocol_future(asset_allowed(
         &plugin_id,
         hash,
         &rel,
@@ -255,6 +256,13 @@ async fn asset_allowed(
     Ok(declared_main || declared_icon || rel.as_str().starts_with("assets/"))
 }
 
+fn block_on_protocol_future<F: Future>(future: F) -> F::Output {
+    match tokio::runtime::Handle::try_current() {
+        Ok(handle) => tokio::task::block_in_place(|| handle.block_on(future)),
+        Err(_) => tauri::async_runtime::block_on(future),
+    }
+}
+
 fn content_type(path: &Path) -> &'static str {
     match path
         .extension()
@@ -291,3 +299,15 @@ fn open_folder(path: &PathBuf) -> Result<(), ErrorDto> {
         .map(|_| ())
         .map_err(|e| ErrorDto::invalid(e.to_string()))
 }
+
+#[cfg(test)]
+mod tests {
+    use super::block_on_protocol_future;
+
+    #[tokio::test(flavor = "multi_thread")]
+    async fn protocol_future_can_be_waited_inside_tauri_runtime() {
+        let value = block_on_protocol_future(async { 42 });
+
+        assert_eq!(value, 42);
+    }
+}