fix: 全量修复批量选择、JWT 60min、script-callback 认证与心跳数据流

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/utils/apiError.ts

@@ -0,0 +1,16 @@
+import { ApiError } from '@/api'
+
+/** Turn FastAPI error bodies into a human-readable string. */
+export function formatApiError(e: unknown, fallback: string): string {
+  if (e instanceof ApiError) {
+    const d = (e as ApiError & { detail?: unknown }).detail ?? e.message
+    if (typeof d === 'string') return d
+    if (Array.isArray(d)) {
+      return d.map((x: { msg?: string }) => x?.msg || JSON.stringify(x)).join('; ')
+    }
+    if (d && typeof d === 'object') return JSON.stringify(d)
+    return e.message || fallback
+  }
+  if (e instanceof Error) return e.message || fallback
+  return fallback
+}