feat(membership): 重构会员权益对比表并优化购买界面布局

- 重构权益对比数据结构，支持独占、有限、无限三种权限类型
- 新增权限图标显示逻辑，区分VIP和普通用户权限状态
- 优化会员卡片布局，采用三段式布局提升视觉效果
- 实现悬浮购买按钮，支持Liquid Glass毛玻璃效果
- 增强购买流程验证，添加自动选择产品和详细错误处理
- 调整界面间距和样式，提升整体用户体验

components/model/MembershipModal.tsx

@@ -74,13 +74,96 @@ const DEFAULT_PLANS: MembershipPlan[] = [
   },
 ];
 
+// 权限类型枚举
+type PermissionType = 'exclusive' | 'limited' | 'unlimited';
 
-const BENEFIT_COMPARISON = [
-  { title: 'AI拍照记录热量', vip: true, regular: false },
-  { title: 'AI拍照识别包装', vip: true, regular: false },
-  { title: '私人饮食建议', vip: true, regular: false },
-  { title: '定制健身训练', vip: true, regular: false },
-  { title: '每日健康提醒', vip: true, regular: true },
+// 权限配置接口
+interface PermissionConfig {
+  type: PermissionType;
+  text: string;
+  vipText?: string; // VIP用户的特殊文案，可选
+}
+
+// 权益对比项接口
+interface BenefitItem {
+  title: string;
+  description?: string; // 功能描述，可选
+  vip: PermissionConfig;
+  regular: PermissionConfig;
+}
+
+// 权益对比配置
+const BENEFIT_COMPARISON: BenefitItem[] = [
+  {
+    title: 'AI拍照记录热量',
+    description: '通过拍照识别食物并自动记录热量',
+    vip: {
+      type: 'unlimited',
+      text: '无限次使用',
+      vipText: '无限次使用'
+    },
+    regular: {
+      type: 'limited',
+      text: '有限次使用',
+      vipText: '每日3次'
+    }
+  },
+  {
+    title: 'AI拍照识别包装',
+    description: '识别食品包装上的营养成分信息',
+    vip: {
+      type: 'unlimited',
+      text: '无限次使用',
+      vipText: '无限次使用'
+    },
+    regular: {
+      type: 'limited',
+      text: '有限次使用',
+      vipText: '每日5次'
+    }
+  },
+  {
+    title: '每日健康提醒',
+    description: '根据个人目标提供个性化健康提醒',
+    vip: {
+      type: 'unlimited',
+      text: '完全支持',
+      vipText: '智能提醒'
+    },
+    regular: {
+      type: 'unlimited',
+      text: '基础提醒',
+      vipText: '基础提醒'
+    }
+  },
+  {
+    title: 'AI教练对话',
+    description: '与AI健康教练进行个性化对话咨询',
+    vip: {
+      type: 'unlimited',
+      text: '无限次对话',
+      vipText: '深度分析'
+    },
+    regular: {
+      type: 'limited',
+      text: '有限次对话',
+      vipText: '每日10次'
+    }
+  },
+  {
+    title: '体态评估',
+    description: '通过照片分析体态问题并提供改善建议',
+    vip: {
+      type: 'exclusive',
+      text: '完全支持',
+      vipText: '专业评估'
+    },
+    regular: {
+      type: 'exclusive',
+      text: '不可使用',
+      vipText: '不可使用'
+    }
+  }
 ];
 
 const PLAN_STYLE_CONFIG: Record<MembershipPlan['type'], { gradient: readonly [string, string]; accent: string }> = {
@@ -98,6 +181,29 @@ const PLAN_STYLE_CONFIG: Record<MembershipPlan['type'], { gradient: readonly [st
   },
 };
 
+// 根据权限类型获取对应的图标
+const getPermissionIcon = (type: PermissionType, isVip: boolean) => {
+  switch (type) {
+    case 'exclusive':
+      return isVip ? (
+        <Ionicons name="checkmark-circle" size={20} color="#FFB200" />
+      ) : (
+        <Ionicons name="remove" size={20} color="#D1D4DA" />
+      );
+    case 'limited':
+      return isVip ? (
+        <Ionicons name="checkmark-circle" size={20} color="#FFB200" />
+      ) : (
+        <Ionicons name="time-outline" size={20} color="#8E8E93" />
+      );
+    case 'unlimited':
+      return (
+        <Ionicons name="checkmark-circle" size={20} color={isVip ? "#FFB200" : "#8E8E93"} />
+      );
+    default:
+      return <Ionicons name="remove" size={20} color="#D1D4DA" />;
+  }
+};
 
 export function MembershipModal({ visible, onClose, onPurchaseSuccess }: MembershipModalProps) {
   const [selectedProduct, setSelectedProduct] = useState<PurchasesStoreProduct | null>(null);
@@ -215,7 +321,14 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
       // 获取产品后，检查用户的购买记录并自动选中对应套餐
       await checkAndSelectActivePlan(productsToUse);
 
-      setSelectedProduct(current => current ?? (productsToUse[0] ?? null));
+      // 确保始终有一个选中的产品
+      setSelectedProduct(current => {
+        // 如果已经有选中的产品，保持不变
+        if (current) return current;
+
+        // 否则选择第一个可用产品
+        return productsToUse[0] ?? null;
+      });
     } catch (e: any) {
       // 安全地处理错误对象，避免循环引用
       const errorData = {
@@ -431,6 +544,15 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
 
 
   const handlePurchase = async () => {
+    // 添加调试日志
+    log.info('handlePurchase 被调用', {
+      loading,
+      productsLength: products.length,
+      selectedProductId: selectedProduct?.identifier,
+      selectedProductTitle: selectedProduct?.title,
+      agreementAccepted
+    });
+
     // 验证是否已同意协议
     if (!agreementAccepted) {
       Alert.alert(
@@ -446,6 +568,16 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
       return;
     }
 
+    // 如果没有选中的产品但有可用产品，自动选择第一个
+    if (!selectedProduct && products.length > 0) {
+      log.info('自动选择第一个可用产品', {
+        firstProductId: products[0]?.identifier,
+        firstProductTitle: products[0]?.title
+      });
+      setSelectedProduct(products[0]);
+      return; // 返回让用户确认选择后再点击
+    }
+
     // 验证是否选择了产品
     if (!selectedProduct) {
       Alert.alert(
@@ -740,20 +872,27 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
           end={{ x: 1, y: 1 }}
           style={styles.planCardGradient}
         >
-          {plan.tag && (
-            <View style={styles.planTag}>
-              <Text style={styles.planTagText}>{plan.tag}</Text>
-            </View>
-          )}
+          <View style={styles.planCardTopSection}>
+            {plan.tag && (
+              <View style={styles.planTag}>
+                <Text style={styles.planTagText}>{plan.tag}</Text>
+              </View>
+            )}
+            <Text style={styles.planCardTitle}>{displayTitle}</Text>
+          </View>
 
-          <Text style={styles.planCardTitle}>{displayTitle}</Text>
-          <Text style={[styles.planCardPrice, styleConfig && { color: styleConfig.accent }]}>
-            {priceLabel || '--'}
-          </Text>
-          {plan.originalPrice && (
-            <Text style={styles.planCardOriginalPrice}>{plan.originalPrice}</Text>
-          )}
-          <Text style={styles.planCardDescription}>{plan.subtitle}</Text>
+          <View style={styles.planCardMiddleSection}>
+            <Text style={[styles.planCardPrice, styleConfig && { color: styleConfig.accent }]}>
+              {priceLabel || '--'}
+            </Text>
+            {plan.originalPrice && (
+              <Text style={styles.planCardOriginalPrice}>{plan.originalPrice}</Text>
+            )}
+          </View>
+
+          <View style={styles.planCardBottomSection}>
+            <Text style={styles.planCardDescription}>{plan.subtitle}</Text>
+          </View>
         </LinearGradient>
       </TouchableOpacity>
     );
@@ -807,7 +946,9 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
             showsVerticalScrollIndicator={false}
           >
 
-            <View style={styles.sectionCard}>
+            <View style={[styles.sectionCard, {
+              marginTop: 56
+            }]}>
               <View style={styles.sectionTitleRow}>
                 <View style={styles.sectionTitleBadge}>
                   <Ionicons name="star" size={16} color="#7B2CBF" />
@@ -860,20 +1001,27 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
                       index % 2 === 1 && styles.tableRowAlt,
                     ]}
                   >
-                    <Text style={[styles.tableCellText, styles.tableTitleCell]}>{row.title}</Text>
-                    <View style={styles.tableVipCell}>
-                      {row.vip ? (
-                        <Ionicons name="checkmark-circle" size={20} color="#FFB200" />
-                      ) : (
-                        <Ionicons name="remove" size={20} color="#D1D4DA" />
+                    <View style={styles.tableTitleCell}>
+                      <Text style={styles.tableCellText}>{row.title}</Text>
+                      {row.description && (
+                        <Text style={styles.tableDescriptionText}>{row.description}</Text>
                       )}
                     </View>
+
+                    {/* VIP 权限列 */}
+                    <View style={styles.tableVipCell}>
+                      <View style={styles.permissionContainer}>
+                        {getPermissionIcon(row.vip.type, true)}
+                        <Text style={styles.permissionText}>{row.vip.vipText || row.vip.text}</Text>
+                      </View>
+                    </View>
+
+                    {/* 普通用户权限列 */}
                     <View style={styles.tableNormalCell}>
-                      {row.regular ? (
-                        <Ionicons name="checkmark-circle" size={20} color="#8E8E93" />
-                      ) : (
-                        <Ionicons name="remove" size={20} color="#D1D4DA" />
-                      )}
+                      <View style={styles.permissionContainer}>
+                        {getPermissionIcon(row.regular.type, false)}
+                        <Text style={styles.permissionText}>{row.regular.vipText || row.regular.text}</Text>
+                      </View>
                     </View>
                   </View>
                 ))}
@@ -881,38 +1029,6 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
             </View>
 
             <View style={styles.bottomSection}>
-              <View style={styles.noticeBanner}>
-                <Text style={styles.noticeText}>667+人正在定制私人计划</Text>
-              </View>
-
-              <TouchableOpacity
-                style={[
-                  styles.purchaseButton,
-                  (loading || !selectedProduct || !agreementAccepted) && styles.disabledButton
-                ]}
-                onPress={handlePurchase}
-                disabled={loading || !selectedProduct || !agreementAccepted}
-                accessible={true}
-                accessibilityLabel={loading ? '正在处理购买' : '购买会员'}
-                accessibilityHint={
-                  loading
-                    ? '购买正在进行中，请稍候'
-                    : selectedProduct
-                      ? `点击购买${selectedProduct.title || '已选'}会员套餐`
-                      : '请选择会员套餐后再进行购买'
-                }
-                accessibilityState={{ disabled: loading || !selectedProduct || !agreementAccepted }}
-              >
-                {loading ? (
-                  <View style={styles.loadingContainer}>
-                    <ActivityIndicator size="small" color="white" style={styles.loadingSpinner} />
-                    <Text style={styles.purchaseButtonText}>正在处理购买...</Text>
-                  </View>
-                ) : (
-                  <Text style={styles.purchaseButtonText}>立即订阅</Text>
-                )}
-              </TouchableOpacity>
-
               <View style={styles.agreementRow}>
                 <CustomCheckBox
                   checked={agreementAccepted}
@@ -964,6 +1080,83 @@ export function MembershipModal({ visible, onClose, onPurchaseSuccess }: Members
               </TouchableOpacity>
             </View>
           </ScrollView>
+
+          {/* 悬浮购买按钮 */}
+          <View style={styles.floatingPurchaseContainer}>
+            {isLiquidGlassAvailable() ? (
+              <GlassView
+                style={[
+                  styles.purchaseButton,
+                  (loading || products.length === 0 || !agreementAccepted) && styles.disabledButton
+                ]}
+                glassEffectStyle="clear"
+                tintColor="rgba(21, 21, 21, 0.8)"
+                isInteractive={true}
+              >
+                <TouchableOpacity
+                  onPress={handlePurchase}
+                  disabled={loading || products.length === 0 || !agreementAccepted}
+                  accessible={true}
+                  accessibilityLabel={loading ? '正在处理购买' : '购买会员'}
+                  accessibilityHint={
+                    loading
+                      ? '购买正在进行中，请稍候'
+                      : products.length === 0
+                        ? '正在加载会员套餐，请稍候'
+                        : !selectedProduct
+                          ? '请选择会员套餐后再进行购买'
+                          : `点击购买${selectedProduct.title || '已选'}会员套餐`
+                  }
+                  accessibilityState={{ disabled: loading || products.length === 0 || !agreementAccepted }}
+                  style={styles.purchaseButtonContent}
+                >
+                  {loading ? (
+                    <View style={styles.loadingContainer}>
+                      <ActivityIndicator size="small" color="white" style={styles.loadingSpinner} />
+                      <Text style={styles.purchaseButtonText}>正在处理购买...</Text>
+                    </View>
+                  ) : (
+                    <Text style={styles.purchaseButtonText}>立即订阅</Text>
+                  )}
+                </TouchableOpacity>
+              </GlassView>
+            ) : (
+              <View
+                style={[
+                  styles.purchaseButton,
+                  styles.fallbackPurchaseButton,
+                  (loading || products.length === 0 || !agreementAccepted) && styles.disabledButton
+                ]}
+              >
+                <TouchableOpacity
+                  onPress={handlePurchase}
+                  disabled={loading || products.length === 0 || !agreementAccepted}
+                  accessible={true}
+                  accessibilityLabel={loading ? '正在处理购买' : '购买会员'}
+                  accessibilityHint={
+                    loading
+                      ? '购买正在进行中，请稍候'
+                      : products.length === 0
+                        ? '正在加载会员套餐，请稍候'
+                        : !selectedProduct
+                          ? '请选择会员套餐后再进行购买'
+                          : `点击购买${selectedProduct.title || '已选'}会员套餐`
+                  }
+                  accessibilityState={{ disabled: loading || products.length === 0 || !agreementAccepted }}
+                  style={styles.purchaseButtonContent}
+                >
+                  {loading ? (
+                    <View style={styles.loadingContainer}>
+                      <ActivityIndicator size="small" color="white" style={styles.loadingSpinner} />
+                      <Text style={styles.purchaseButtonText}>正在处理购买...</Text>
+                    </View>
+                  ) : (
+                    <Text style={styles.purchaseButtonText}>立即订阅</Text>
+                  )}
+                </TouchableOpacity>
+              </View>
+            )}
+          </View>
         </View>
       </View>
     </Modal>
@@ -991,7 +1184,7 @@ const styles = StyleSheet.create({
   },
   modalContentContainer: {
     paddingHorizontal: 20,
-    paddingBottom: 32,
+    paddingBottom: 100, // 增加底部内边距，避免内容被悬浮按钮遮挡
     paddingTop: 16,
   },
   floatingBackButton: {
@@ -1080,9 +1273,11 @@ const styles = StyleSheet.create({
     elevation: 4,
   },
   planCardGradient: {
+    flex: 1,
     paddingHorizontal: 16,
     paddingVertical: 18,
     minHeight: 170,
+    justifyContent: 'space-between',
   },
   planTag: {
     alignSelf: 'flex-start',
@@ -1111,14 +1306,26 @@ const styles = StyleSheet.create({
     fontSize: 13,
     color: '#8E8EA1',
     textDecorationLine: 'line-through',
-    marginTop: 4,
+    marginTop: 2,
   },
   planCardDescription: {
     fontSize: 12,
     color: '#6C6C77',
-    marginTop: 12,
     lineHeight: 17,
   },
+  planCardTopSection: {
+    flex: 1,
+    justifyContent: 'flex-start',
+  },
+  planCardMiddleSection: {
+    flex: 1,
+    justifyContent: 'center',
+    alignItems: 'flex-start',
+  },
+  planCardBottomSection: {
+    flex: 1,
+    justifyContent: 'flex-end',
+  },
   tipsContainer: {
     flexDirection: 'row',
     alignItems: 'center',
@@ -1163,15 +1370,18 @@ const styles = StyleSheet.create({
     color: '#3E3E44',
   },
   tableTitleCell: {
-    flex: 1.3,
+    flex: 1.5,
+    justifyContent: 'center',
   },
   tableVipCell: {
     flex: 0.8,
     alignItems: 'center',
+    justifyContent: 'center',
   },
   tableNormalCell: {
     flex: 0.8,
     alignItems: 'center',
+    justifyContent: 'center',
   },
   tableRowAlt: {
     backgroundColor: '#FBFBFF',
@@ -1188,26 +1398,27 @@ const styles = StyleSheet.create({
     shadowOffset: { width: 0, height: 6 },
     elevation: 1,
   },
-  noticeBanner: {
-    backgroundColor: '#FFE7E0',
-    borderRadius: 12,
-    paddingVertical: 10,
-    paddingHorizontal: 16,
-    marginBottom: 16,
-  },
-  noticeText: {
-    color: '#D35400',
-    fontSize: 13,
-    textAlign: 'center',
-    fontWeight: '600',
-  },
   purchaseButton: {
-    backgroundColor: '#151515',
     borderRadius: 28,
     height: 52,
     justifyContent: 'center',
     alignItems: 'center',
-    marginBottom: 16,
+    overflow: 'hidden',
+  },
+  purchaseButtonContent: {
+    flex: 1,
+    width: '100%',
+    justifyContent: 'center',
+    alignItems: 'center',
+  },
+  floatingPurchaseContainer: {
+    position: 'absolute',
+    bottom: 34, // 底部安全区域
+    left: 20,
+    right: 20,
+  },
+  fallbackPurchaseButton: {
+    backgroundColor: '#151515',
   },
   disabledButton: {
     backgroundColor: '#C6C6C8',
@@ -1228,23 +1439,23 @@ const styles = StyleSheet.create({
     flexDirection: 'row',
     alignItems: 'center',
     justifyContent: 'center',
-    flexWrap: 'wrap',
+    flexWrap: 'nowrap',
     marginBottom: 16,
   },
   agreementPrefix: {
-    fontSize: 11,
+    fontSize: 10,
     color: '#666672',
-    marginHorizontal: 6,
+    marginRight: 4,
   },
   agreementLink: {
-    fontSize: 11,
+    fontSize: 10,
     color: '#E91E63',
     textDecorationLine: 'underline',
     fontWeight: '500',
-    marginHorizontal: 4,
+    marginHorizontal: 2,
   },
   agreementSeparator: {
-    fontSize: 11,
+    fontSize: 10,
     color: '#A0A0B0',
     marginHorizontal: 2,
   },
@@ -1271,4 +1482,24 @@ const styles = StyleSheet.create({
   disabledPlanCard: {
     opacity: 0.5,
   },
+  // 新增样式：权限相关
+  tableDescriptionText: {
+    fontSize: 11,
+    color: '#8E8E93',
+    marginTop: 2,
+    lineHeight: 14,
+  },
+  permissionContainer: {
+    alignItems: 'center',
+    justifyContent: 'center',
+    flexDirection: 'column',
+    paddingVertical: 4,
+  },
+  permissionText: {
+    fontSize: 10,
+    color: '#6B6B73',
+    marginTop: 4,
+    textAlign: 'center',
+    lineHeight: 12,
+  },
 });