feat: add SingleRecordMnt component for student record maintenance with search, add, edit, view, and delete functionalities

src/services/http-error.ts

@@ -0,0 +1,28 @@
+// 全域 HTTP 錯誤事件（Playground 專用）
+//
+// 目的：
+// - 避免 axios interceptor 直接 import router 造成耦合
+// - 由 router 層或 App 層決定要導到哪個錯誤頁與顯示哪些訊息
+
+export const HTTP_ERROR_EVENT = 'sk-playground:http-error'
+
+export type HttpErrorDetail = {
+  status?: number
+  message?: string
+}
+
+let httpErrorEmitted = false
+
+export function emitHttpError (detail: HttpErrorDetail) {
+  // 避免同一波大量錯誤觸發多次導頁
+  if (httpErrorEmitted) return
+  httpErrorEmitted = true
+
+  window.dispatchEvent(new CustomEvent<HttpErrorDetail>(HTTP_ERROR_EVENT, { detail }))
+
+  // 下一個 event loop 再允許觸發（避免把 guard 永久鎖住）
+  setTimeout(() => {
+    httpErrorEmitted = false
+  }, 0)
+}
+