feat(medications): 重构药品通知系统并添加独立设置页面

- 创建药品通知服务模块，统一管理药品提醒通知的调度和取消
- 新增独立的通知设置页面，支持总开关和药品提醒开关分离控制
- 重构药品详情页面，移除频率编辑功能到独立页面
- 优化药品添加流程，支持拍照和相册选择图片
- 改进通知权限检查和错误处理机制
- 更新用户偏好设置，添加药品提醒开关配置

app/medications/add-medication.tsx

@@ -7,6 +7,7 @@ import { useAppDispatch } from '@/hooks/redux';
 import { useAuthGuard } from '@/hooks/useAuthGuard';
 import { useColorScheme } from '@/hooks/useColorScheme';
 import { useCosUpload } from '@/hooks/useCosUpload';
+import { medicationNotificationService } from '@/services/medicationNotifications';
 import { createMedicationAction, fetchMedicationRecords, fetchMedications } from '@/store/medicationsSlice';
 import type { MedicationForm, RepeatPattern } from '@/types/medication';
 import { Ionicons, MaterialCommunityIcons } from '@expo/vector-icons';
@@ -288,6 +289,16 @@ export default function AddMedicationScreen() {
       const today = dayjs().format('YYYY-MM-DD');
       await dispatch(fetchMedicationRecords({ date: today }));
       
+      // 重新安排药品通知
+      try {
+        // 获取最新的药品列表
+        const medications = await dispatch(fetchMedications({ isActive: true })).unwrap();
+        await medicationNotificationService.rescheduleAllMedicationNotifications(medications);
+      } catch (error) {
+        console.error('[MEDICATION] 安排药品通知失败:', error);
+        // 不影响添加药品的成功流程，只记录错误
+      }
+      
       // 成功提示
       Alert.alert(
         '添加成功',
@@ -357,42 +368,99 @@ export default function AddMedicationScreen() {
     }
   }, [dictationActive, dictationLoading, isDictationSupported]);
 
-  const handleTakePhoto = useCallback(async () => {
-    try {
-      const permission = await ImagePicker.requestCameraPermissionsAsync();
-      if (permission.status !== 'granted') {
-        Alert.alert('权限不足', '需要相机权限以拍摄药品照片');
-        return;
-      }
+  // 处理图片选择（拍照或相册）
+  const handleSelectPhoto = useCallback(() => {
+    Alert.alert(
+      '选择图片',
+      '请选择图片来源',
+      [
+        {
+          text: '拍照',
+          onPress: async () => {
+            try {
+              const permission = await ImagePicker.requestCameraPermissionsAsync();
+              if (permission.status !== 'granted') {
+                Alert.alert('权限不足', '需要相机权限以拍摄药品照片');
+                return;
+              }
 
-      const result = await ImagePicker.launchCameraAsync({
-        allowsEditing: true,
-        mediaTypes: ImagePicker.MediaTypeOptions.Images,
-        quality: 0.9,
-      });
+              const result = await ImagePicker.launchCameraAsync({
+                allowsEditing: true,
+                quality: 0.9,
+                aspect: [9,16]
+              });
 
-      if (result.canceled || !result.assets?.length) {
-        return;
-      }
+              if (result.canceled || !result.assets?.length) {
+                return;
+              }
 
-      const asset = result.assets[0];
-      setPhotoPreview(asset.uri);
-      setPhotoUrl(null);
+              const asset = result.assets[0];
+              setPhotoPreview(asset.uri);
+              setPhotoUrl(null);
 
-      try {
-        const { url } = await upload(
-          { uri: asset.uri, name: asset.fileName ?? `medication-${Date.now()}.jpg`, type: asset.mimeType ?? 'image/jpeg' },
-          { prefix: 'images/medications' }
-        );
-        setPhotoUrl(url);
-      } catch (uploadError) {
-        console.error('[MEDICATION] 图片上传失败', uploadError);
-        Alert.alert('上传失败', '图片上传失败，请稍后重试');
-      }
-    } catch (error) {
-      console.error('[MEDICATION] 拍照失败', error);
-      Alert.alert('拍照失败', '无法打开相机，请稍后再试');
-    }
+              try {
+                const { url } = await upload(
+                  { uri: asset.uri, name: asset.fileName ?? `medication-${Date.now()}.jpg`, type: asset.mimeType ?? 'image/jpeg' },
+                  { prefix: 'images/medications' }
+                );
+                setPhotoUrl(url);
+              } catch (uploadError) {
+                console.error('[MEDICATION] 图片上传失败', uploadError);
+                Alert.alert('上传失败', '图片上传失败，请稍后重试');
+              }
+            } catch (error) {
+              console.error('[MEDICATION] 拍照失败', error);
+              Alert.alert('拍照失败', '无法打开相机，请稍后再试');
+            }
+          },
+        },
+        {
+          text: '从相册选择',
+          onPress: async () => {
+            try {
+              const permission = await ImagePicker.requestMediaLibraryPermissionsAsync();
+              if (permission.status !== 'granted') {
+                Alert.alert('权限不足', '需要相册权限以选择药品照片');
+                return;
+              }
+
+              const result = await ImagePicker.launchImageLibraryAsync({
+                allowsEditing: true,
+                mediaTypes: ImagePicker.MediaTypeOptions.Images,
+                quality: 0.9,
+              });
+
+              if (result.canceled || !result.assets?.length) {
+                return;
+              }
+
+              const asset = result.assets[0];
+              setPhotoPreview(asset.uri);
+              setPhotoUrl(null);
+
+              try {
+                const { url } = await upload(
+                  { uri: asset.uri, name: asset.fileName ?? `medication-${Date.now()}.jpg`, type: asset.mimeType ?? 'image/jpeg' },
+                  { prefix: 'images/medications' }
+                );
+                setPhotoUrl(url);
+              } catch (uploadError) {
+                console.error('[MEDICATION] 图片上传失败', uploadError);
+                Alert.alert('上传失败', '图片上传失败，请稍后重试');
+              }
+            } catch (error) {
+              console.error('[MEDICATION] 从相册选择失败', error);
+              Alert.alert('选择失败', '无法打开相册，请稍后再试');
+            }
+          },
+        },
+        {
+          text: '取消',
+          style: 'cancel',
+        },
+      ],
+      { cancelable: true }
+    );
   }, [upload]);
 
   const handleRemovePhoto = useCallback(() => {
@@ -539,7 +607,7 @@ export default function AddMedicationScreen() {
                   backgroundColor: colors.surface,
                 },
               ]}
-              onPress={handleTakePhoto}
+              onPress={handleSelectPhoto}
               disabled={uploading}
             >
               {photoPreview ? (
@@ -548,7 +616,7 @@ export default function AddMedicationScreen() {
                   <View style={styles.photoOverlay}>
                     <Ionicons name="camera" size={18} color="#fff" />
                     <ThemedText style={styles.photoOverlayText}>
-                      {uploading ? '上传中…' : '重新拍摄'}
+                      {uploading ? '上传中…' : '重新选择'}
                     </ThemedText>
                   </View>
                   <Pressable style={styles.photoRemoveBtn} onPress={handleRemovePhoto} hitSlop={12}>
@@ -560,8 +628,8 @@ export default function AddMedicationScreen() {
                   <View style={[styles.photoIconBadge, { backgroundColor: `${colors.primary}12` }]}>
                     <Ionicons name="camera" size={22} color={colors.primary} />
                   </View>
-                  <ThemedText style={[styles.photoTitle, { color: colors.text }]}>拍照上传药品图片</ThemedText>
-                  <ThemedText style={[styles.photoSubtitle, { color: colors.textMuted }]}>辅助识别药品包装，更易区分</ThemedText>
+                  <ThemedText style={[styles.photoTitle, { color: colors.text }]}>上传药品图片</ThemedText>
+                  <ThemedText style={[styles.photoSubtitle, { color: colors.textMuted }]}>拍照或从相册选择，辅助识别药品包装</ThemedText>
                 </View>
               )}
               {uploading && (