feat(medications): 添加AI智能识别药品功能和有效期管理

- 新增AI药品识别流程，支持多角度拍摄和实时进度显示
- 添加药品有效期字段，支持在添加和编辑药品时设置有效期
- 新增MedicationAddOptionsSheet选择录入方式（AI识别/手动录入）
- 新增ai-camera和ai-progress两个独立页面处理AI识别流程
- 新增ExpiryDatePickerModal和MedicationPhotoGuideModal组件
- 移除本地通知系统，迁移到服务端推送通知
- 添加medicationNotificationCleanup服务清理旧的本地通知
- 更新药品详情页支持AI草稿模式和有效期显示
- 优化药品表单，支持有效期选择和AI识别结果确认
- 更新i18n资源，添加有效期相关翻译

BREAKING CHANGE: 药品通知系统从本地通知迁移到服务端推送，旧版本的本地通知将被清理

services/medications.ts

@@ -7,6 +7,7 @@ import type {
   Medication,
   MedicationAiAnalysisV2,
   MedicationForm,
+  MedicationRecognitionTask,
   MedicationRecord,
   MedicationStatus,
   RepeatPattern,
@@ -28,6 +29,7 @@ export interface CreateMedicationDto {
   medicationTimes: string[];
   startDate: string;
   endDate?: string | null;
+  expiryDate?: string | null;
   repeatPattern?: RepeatPattern;
   note?: string;
 }
@@ -344,3 +346,39 @@ export async function analyzeMedicationV2(
     {}
   );
 }
+
+// ==================== AI 药品识别任务 ====================
+
+export interface CreateMedicationRecognitionDto {
+  frontImageUrl: string;
+  sideImageUrl: string;
+  auxiliaryImageUrl?: string;
+}
+
+export interface ConfirmMedicationRecognitionDto {
+  name?: string;
+  timesPerDay?: number;
+  medicationTimes?: string[];
+  startDate?: string;
+  endDate?: string | null;
+  note?: string;
+}
+
+export const createMedicationRecognitionTask = async (
+  dto: CreateMedicationRecognitionDto
+): Promise<{ taskId: string; status: MedicationRecognitionTask['status'] }> => {
+  return api.post('/medications/ai-recognize', dto);
+};
+
+export const getMedicationRecognitionStatus = async (
+  taskId: string
+): Promise<MedicationRecognitionTask> => {
+  return api.get(`/medications/ai-recognize/${taskId}/status`);
+};
+
+export const confirmMedicationRecognition = async (
+  taskId: string,
+  payload?: ConfirmMedicationRecognitionDto
+): Promise<Medication> => {
+  return api.post(`/medications/ai-recognize/${taskId}/confirm`, payload ?? {});
+};