feat(medications): 优化药品管理功能和登录流程

- 更新默认药品图片为专用图标
- 移除未使用的 loading 状态选择器
- 优化 Apple 登录按钮样式，支持毛玻璃效果和加载状态
- 添加登录成功后返回功能(shouldBack 参数)
- 药品详情页添加信息卡片点击交互
- 添加药品添加页面的登录状态检查
- 增强时间选择器错误处理和数据验证
- 修复药品图片显示逻辑，支持网络图片
- 优化药品卡片样式和布局
- 添加图片加载错误处理

app/(tabs)/medications.tsx

@@ -5,7 +5,7 @@ import { IconSymbol } from '@/components/ui/IconSymbol';
 import { Colors } from '@/constants/Colors';
 import { useAppDispatch, useAppSelector } from '@/hooks/redux';
 import { useColorScheme } from '@/hooks/useColorScheme';
-import { fetchMedicationRecords, fetchMedications, selectMedicationDisplayItemsByDate, selectMedicationsLoading } from '@/store/medicationsSlice';
+import { fetchMedicationRecords, fetchMedications, selectMedicationDisplayItemsByDate } from '@/store/medicationsSlice';
 import { DEFAULT_MEMBER_NAME } from '@/store/userSlice';
 import { useFocusEffect } from '@react-navigation/native';
 import dayjs, { Dayjs } from 'dayjs';
@@ -42,7 +42,6 @@ export default function MedicationsScreen() {
   // 从 Redux 获取数据
   const selectedKey = selectedDate.format('YYYY-MM-DD');
   const medicationsForDay = useAppSelector((state) => selectMedicationDisplayItemsByDate(selectedKey)(state));
-  const loading = useAppSelector(selectMedicationsLoading);
 
   const handleOpenAddMedication = useCallback(() => {
     router.push('/medications/add-medication');
@@ -79,9 +78,11 @@ export default function MedicationsScreen() {
 
   // 为每个药物添加默认图片（如果没有图片）
   const medicationsWithImages = useMemo(() => {
+    console.log('medicationsForDay', medicationsForDay);
+    
     return medicationsForDay.map((med: any) => ({
       ...med,
-      image: med.image || require('@/assets/images/icons/icon-healthy-diet.png'), // 默认使用瓶子图标
+      image: med.image || require('@/assets/images/medicine/image-medicine.png'), // 默认使用瓶子图标
     }));
   }, [medicationsForDay]);