feat(miniprogram): 用药提醒从 localStorage 迁移到服务端 API

- 新增 medication-reminder.ts service（list/create/update/delete）
- 重写 medication/index.tsx 页面，通过后端 API 持久化数据
- 支持乐观锁（version）、患者 ID 关联、提醒时间数组
- 移除旧的 localStorage 读写逻辑

apps/miniprogram/src/services/medication-reminder.ts

@@ -0,0 +1,68 @@
+import Taro from '@tarojs/taro';
+import { api } from './request';
+
+export interface MedicationReminder {
+  id: string;
+  patient_id: string;
+  medication_name: string;
+  dosage?: string;
+  frequency?: string;
+  reminder_times: string[];
+  start_date?: string;
+  end_date?: string;
+  is_active: boolean;
+  notes?: string;
+  version: number;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface CreateReminderReq {
+  patient_id: string;
+  medication_name: string;
+  dosage?: string;
+  frequency?: string;
+  reminder_times: string[];
+  start_date?: string;
+  end_date?: string;
+  is_active?: boolean;
+  notes?: string;
+}
+
+export interface UpdateReminderReq {
+  medication_name?: string;
+  dosage?: string;
+  frequency?: string;
+  reminder_times?: string[];
+  start_date?: string;
+  end_date?: string;
+  is_active?: boolean;
+  notes?: string;
+  version: number;
+}
+
+function getPatientId(): string {
+  return Taro.getStorageSync('current_patient_id') || '';
+}
+
+export async function listReminders() {
+  const patientId = getPatientId();
+  if (!patientId) return { data: [] as MedicationReminder[], total: 0 };
+  return api.get<{ data: MedicationReminder[]; total: number }>(
+    `/health/patients/${patientId}/medication-reminders`,
+    { page: 1, page_size: 100 },
+    0,
+  );
+}
+
+export async function createReminder(req: CreateReminderReq) {
+  return api.post<MedicationReminder>('/health/medication-reminders', req);
+}
+
+export async function updateReminder(id: string, req: UpdateReminderReq) {
+  return api.put<MedicationReminder>(`/health/medication-reminders/${id}`, req);
+}
+
+export async function deleteReminder(id: string, version: number) {
+  return api.delete<void>(`/health/medication-reminders/${id}`, { version });
+}