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.kiro/specs/settlement-ui-optimization/design.md
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.kiro/specs/settlement-ui-optimization/design.md
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# Design Document
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## Overview
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本设计文档描述了结算页面（应结账款）UI优化的技术实现方案。优化目标是提升视觉层次、改善信息密度、增强交互反馈，从而提供更好的用户体验。
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当前页面基于 Vue 3 + TypeScript + uni-app 框架开发，使用 SCSS 进行样式管理。优化将保持现有架构不变，主要通过调整样式、优化组件结构和改进视觉设计来实现。
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## Architecture
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### 组件层次结构
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```
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settlement.vue (主页面)
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├── DueAlert (到期提醒区域)
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│ └── DueItem[] (到期项列表)
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├── TabNavigation (标签导航)
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│ └── TabItem[] (标签项)
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├── MerchantGroup[] (商户分组)
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│ ├── MerchantHeader (商户头部)
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│ ├── BatchActionButton (批量操作按钮)
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│ └── OrderList (订单列表)
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│ └── OrderItem[] (订单项)
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│ ├── OrderHeader (订单头部)
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│ ├── OrderContent (订单内容)
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│ └── OrderFooter (订单操作)
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└── EmptyState (空状态)
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```
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### 样式架构
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采用 BEM 命名规范和模块化 SCSS：
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- 使用语义化的颜色变量
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- 统一的间距系统（基于 4rpx 倍数）
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- 响应式字体大小
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- 可复用的混入（mixin）
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## Components and Interfaces
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### 1. DueAlert Component
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**职责**: 显示即将到期的账款提醒
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**Props**: 无（从 store 获取数据）
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**数据源**: `financeStore.dueOrders`
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**视觉特性**:
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- 琥珀色背景 (#fffbe6)
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- 警告图标 + 标题
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- 横向滚动列表
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- 卡片式到期项
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### 2. TabNavigation Component
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**职责**: 提供未结/已结状态切换
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**Props**: 无
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**状态**: `currentTab` (0: 未结, 1: 已结)
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**视觉特性**:
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- 固定在顶部
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- 活动标签蓝色下划线
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- 平滑过渡动画
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### 3. MerchantGroup Component
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**职责**: 按商户聚合显示账款信息
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**数据结构**:
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```typescript
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interface MerchantGroup {
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merchantId: string
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merchantName: string
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settlements: Settlement[]
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totalAmount: number
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hasOverdue: boolean
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}
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```
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**视觉特性**:
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- 圆角卡片 (16rpx)
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- 渐变头部背景
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- 逾期徽章
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- 突出显示总金额
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### 4. OrderItem Component
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**职责**: 显示单个订单的结算信息
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**数据结构**:
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```typescript
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interface Settlement {
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id: string
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orderNo: string
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merchantId: string
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merchantName: string
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amount: number
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dueDate: string
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settlementDate?: string
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status: SettlementStatus
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}
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```
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**视觉特性**:
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- 清晰的信息层次
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- 状态徽章（颜色编码）
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- 金额突出显示
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- 操作按钮（未结状态）
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## Data Models
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### SettlementStatus Enum
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```typescript
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enum SettlementStatus {
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UNSETTLED = 'unsettled', // 未结
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SETTLED = 'settled', // 已结
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OVERDUE = 'overdue' // 已逾期
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}
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```
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### Settlement Interface
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```typescript
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interface Settlement {
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id: string
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orderNo: string
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merchantId: string
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merchantName: string
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amount: number
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dueDate: string
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settlementDate?: string
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status: SettlementStatus
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}
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```
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### DueOrder Interface
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```typescript
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interface DueOrder {
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id: string
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dueDate: string
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amount: number
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}
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```
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## Correctness Properties
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*A property is a characteristic or behavior that should hold true across all valid executions of a system-essentially, a formal statement about what the system should do. Properties serve as the bridge between human-readable specifications and machine-verifiable correctness guarantees.*
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### Property 1: Due Alert Visibility Consistency
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*For any* state of the due orders list, when the list is empty, the Due Alert component should not be rendered in the DOM
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**Validates: Requirements 1.4**
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### Property 2: Merchant Grouping Completeness
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*For any* settlement list, all settlements should be grouped by merchantId with no settlements left ungrouped or duplicated across groups
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**Validates: Requirements 2.1**
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### Property 3: Status Badge Color Mapping
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*For any* settlement status value, the rendered status badge should use the correct color scheme (green for settled, amber for unsettled, red for overdue)
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**Validates: Requirements 3.3**
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### Property 4: Amount Display Formatting
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*For any* numeric amount value, when displayed in the UI, it should be formatted with exactly 2 decimal places and prefixed with the ¥ symbol
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**Validates: Requirements 3.4**
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### Property 5: Tab State Synchronization
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*For any* tab selection change, the active tab indicator should update and the corresponding settlement data should be loaded matching the selected status
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**Validates: Requirements 5.4**
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### Property 6: Button Interaction Feedback
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*For any* button press event, the button should apply 0.8 opacity during the active state to provide visual feedback
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**Validates: Requirements 4.3**
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### Property 7: Overdue Badge Display Logic
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*For any* merchant group, the overdue badge should be displayed if and only if at least one settlement in that group has status OVERDUE
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**Validates: Requirements 2.3**
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### Property 8: Empty State Rendering
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*For any* state where the grouped merchant list is empty, the empty state component should be displayed with centered alignment and appropriate messaging
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**Validates: Requirements 6.1, 6.2, 6.3, 6.4**
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### Property 9: Spacing Consistency
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*For any* rendered card or container element, the padding and margin values should follow the 4rpx-based spacing system (20rpx, 24rpx, etc.)
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**Validates: Requirements 7.1, 7.2, 7.3**
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### Property 10: Color Semantic Consistency
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*For any* UI element representing a specific semantic meaning (primary action, amount, success, warning, danger), the color used should match the defined color palette
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**Validates: Requirements 8.1, 8.2, 8.3, 8.4, 8.5, 8.6**
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## Error Handling
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### 数据加载错误
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- 使用 uni.showToast 显示错误提示
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- 保持当前状态，允许用户重试
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- 下拉刷新作为恢复机制
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### 消账提交错误
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- 显示具体错误信息
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- 保持弹窗打开，允许用户修改后重试
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- 使用 loading 状态防止重复提交
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### 空数据处理
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- 显示友好的空状态页面
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- 提供明确的提示信息
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- 不显示错误，因为空数据是正常状态
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## Testing Strategy
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### Unit Testing
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本项目将使用 **Vitest** 作为单元测试框架，配合 **@vue/test-utils** 进行 Vue 组件测试。
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**测试范围**:
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1. **计算属性测试**
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- `groupedByMerchant`: 验证商户分组逻辑正确性
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- `currentWriteOffAmount`: 验证单个/批量消账金额计算
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2. **方法测试**
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- `getStatusText()`: 验证状态文本映射
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- `getStatusClass()`: 验证状态样式类映射
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- `handleTabChange()`: 验证标签切换逻辑
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3. **边界情况**
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- 空数据列表
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- 单个商户多个订单
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- 全部逾期订单
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### Property-Based Testing
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本项目将使用 **fast-check** 作为属性测试库，验证通用正确性属性。
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**配置要求**:
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- 每个属性测试至少运行 100 次迭代
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- 使用明确的注释标记关联的设计文档属性
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**测试属性**:
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每个属性测试必须使用以下格式的注释标记：
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```typescript
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// **Feature: settlement-ui-optimization, Property {number}: {property_text}**
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```
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**属性测试列表**:
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1. **Property 1**: Due Alert Visibility Consistency
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2. **Property 2**: Merchant Grouping Completeness
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3. **Property 3**: Status Badge Color Mapping
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4. **Property 4**: Amount Display Formatting
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5. **Property 5**: Tab State Synchronization
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6. **Property 6**: Button Interaction Feedback
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7. **Property 7**: Overdue Badge Display Logic
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8. **Property 8**: Empty State Rendering
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9. **Property 9**: Spacing Consistency
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10. **Property 10**: Color Semantic Consistency
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### 测试工具和依赖
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```json
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{
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"devDependencies": {
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"vitest": "^1.0.0",
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"@vue/test-utils": "^2.4.0",
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"fast-check": "^3.15.0",
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"@vitest/ui": "^1.0.0"
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}
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}
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```
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### 测试命令
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```bash
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# 运行所有测试
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pnpm test
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# 运行单元测试
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pnpm test:unit
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# 运行属性测试
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pnpm test:property
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# 测试覆盖率
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pnpm test:coverage
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```
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## Implementation Notes
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### 样式优化重点
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1. **颜色系统**
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- 主色：#1890ff (蓝色)
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- 金额：#ff4d4f (红色)
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- 成功：#52c41a (绿色)
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- 警告：#faad14 (琥珀色)
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- 文本层次：#333 / #666 / #999
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2. **间距系统**
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- 基础单位：4rpx
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- 常用值：20rpx, 24rpx, 32rpx
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- 卡片间距：20rpx
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- 内容内边距：24rpx
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3. **圆角规范**
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- 卡片：16rpx
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- 按钮：8rpx
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- 徽章：4rpx
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4. **阴影效果**
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- 卡片：0 2rpx 8rpx rgba(0, 0, 0, 0.05)
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- 固定导航：0 2rpx 8rpx rgba(0, 0, 0, 0.05)
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### 性能考虑
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- 使用 `v-if` 而非 `v-show` 处理大列表的条件渲染
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- 商户分组减少渲染节点数量
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- 横向滚动使用 `scroll-view` 组件优化性能
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### 可访问性
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- 保持足够的颜色对比度（WCAG AA 标准）
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- 使用语义化的图标
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- 提供清晰的状态反馈
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### 响应式设计
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- 使用 rpx 单位适配不同屏幕
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- 固定导航栏考虑 H5 环境的顶部偏移
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- 横向滚动适配小屏幕设备
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