fix(miniprogram): 预约详情/随访详情改为 API 获取数据，移除 Storage 缓存传递

apps/miniprogram/src/services/appointment.ts

@@ -30,6 +30,10 @@ export async function listAppointments(page = 1) {
   return api.get<{ data: Appointment[]; total: number }>(`/health/appointments?page=${page}&page_size=20`);
 }
 
+export async function getAppointment(id: string) {
+  return api.get<Appointment>(`/health/appointments/${id}`);
+}
+
 export async function createAppointment(data: {
   patient_id: string;
   doctor_id: string;