feat: improve error handling

i18n/en.json

@@ -73,5 +73,8 @@
     "error": "Generate report failed: {0}",
     "downloadingFonts": "Downloading necessary fonts, this may take some time...",
     "downloadFontFailed": "Download font failed"
+  },
+  "error": {
+    "requestBlockedByCORS": "The current API provider may not allow cross-origin requests. Please try a different service provider or contact the provider for support."
   }
 }

i18n/zh.json

@@ -73,5 +73,8 @@
     "error": "生成报告失败：{0}",
     "downloadingFonts": "正在下载必要字体，可能需要较长时间...",
     "downloadFontFailed": "下载字体失败"
+  },
+  "error": {
+    "requestBlockedByCORS": "当前 API 服务可能不允许接口跨域，请换一个服务试试，或者向服务方反馈。"
   }
 }