feat: download retry and error surfacing (#95)

src/hooks/useGameManager.ts

@@ -364,9 +364,17 @@ export function useGameManager({
     const unlistenRunner = TauriService.onRunnerDownloadProgress((p) =>
       setRunnerDownloadProgress(p),
     );
+    const unlistenError = TauriService.onBackendError((msg) => {
+      setError(msg);
+    });
+    const unlistenRetry = TauriService.onDownloadRetry((attempt) => {
+      setError(`Download failed, retrying (${attempt}/3)...`);
+    });
     return () => {
       unlistenDownload.then((u) => u());
       unlistenRunner.then((u) => u());
+      unlistenError.then((u) => u());
+      unlistenRetry.then((u) => u());
     };
   }, [customEditions, checkInstalls]);
 

src/services/TauriService.ts

@@ -206,6 +206,18 @@ export class TauriService {
     );
   }
 
+  static onBackendError(callback: (message: string) => void) {
+    return listen<string>("backend-error", (event) =>
+      callback(event.payload),
+    );
+  }
+
+  static onDownloadRetry(callback: (attempt: number) => void) {
+    return listen<number>("download-retry", (event) =>
+      callback(event.payload),
+    );
+  }
+
   static async openUrl(url: string): Promise<void> {
     return invoke("plugin:opener|open_url", { url });
   }