Fix Python command resolution

src/python-runtime.ts

@@ -38,7 +38,11 @@ export async function resolveBasePythonCommand(config: AppConfig): Promise<{ com
     return { command: venvPath, args: [] };
   }
 
-  return await resolveBasePythonCommand(config);
+  if (process.platform === "win32") {
+    return { command: "python", args: [] };
+  }
+
+  return { command: "python3", args: [] };
 }
 
 export async function resolveWorkerPythonCommand(config: AppConfig): Promise<{ command: string; args: string[] }> {