fix: 修复收入预算计算和添加存款计划明细功能

问题1：修复收入预算实际金额计算
- 在 BudgetRepository.cs 中修复 SelectedCategories.Split 逻辑
- 添加 StringSplitOptions.RemoveEmptyEntries 和 StringSplitOptions.TrimEntries 参数
- 添加单元测试验证修复

问题2：添加存款计划明细按钮和弹窗
- 在 BudgetCard.vue 中添加 'show-detail' emit
- 为存款计划卡片（category === 2）添加明细按钮
- 在 SavingsBudgetContent.vue 中实现明细弹窗
- 弹窗显示：收入预算、支出预算、计划存款公式、存款结果

问题3：统一卡片样式
- 修复 BudgetChartAnalysis.vue 的卡片样式
- 使用 16px 圆角、增强阴影和边框

WebApi.Test/Repository/BudgetRepositoryTest.cs

@@ -1,4 +1,4 @@
-namespace WebApi.Test.Repository;
+namespace WebApi.Test.Repository;
 
 public class BudgetRepositoryTest : TransactionTestBase
 {
@@ -64,4 +64,62 @@ public class BudgetRepositoryTest : TransactionTestBase
         var b2_updated = all.First(b => b.Name == "B2");
         b2_updated.SelectedCategories.Should().Be("美食");
     }
+
+    [Fact]
+    public async Task GetCurrentAmountAsync_收入预算家庭年终奖金_Test()
+    {
+        // Arrange
+        // 创建收入交易记录，分类为"家庭年终奖金"
+        await _transactionRepository.AddAsync(CreateIncome(50000, classify: "家庭年终奖金", reason: "年终奖"));
+        await _transactionRepository.AddAsync(CreateIncome(30000, classify: "家庭年终奖金", reason: "绩效奖"));
+
+        // 创建其他收入交易，不应计入该预算
+        await _transactionRepository.AddAsync(CreateIncome(20000, classify: "工资", reason: "月工资"));
+
+        // 创建收入预算，包含"家庭年终奖金"分类
+        var budget = new BudgetRecord
+        {
+            Limit = 100000,
+            Category = BudgetCategory.Income,
+            SelectedCategories = "家庭年终奖金",
+            Name = "家庭年终奖金"
+        };
+
+        var startDate = DateTime.Now.AddDays(-1);
+        var endDate = DateTime.Now.AddDays(1);
+
+        // Act
+        var amount = await _repository.GetCurrentAmountAsync(budget, startDate, endDate);
+
+        // Assert
+        // 应该汇总两条"家庭年终奖金"交易：50000 + 30000 = 80000
+        amount.Should().Be(80000);
+    }
+
+    [Fact]
+    public async Task GetCurrentAmountAsync_收入预算多个分类_Test()
+    {
+        // Arrange
+        await _transactionRepository.AddAsync(CreateIncome(50000, classify: "家庭年终奖金"));
+        await _transactionRepository.AddAsync(CreateIncome(20000, classify: "工资"));
+
+        // 创建收入预算，包含多个分类
+        var budget = new BudgetRecord
+        {
+            Limit = 80000,
+            Category = BudgetCategory.Income,
+            SelectedCategories = "家庭年终奖金,工资",
+            Name = "年收入"
+        };
+
+        var startDate = DateTime.Now.AddDays(-1);
+        var endDate = DateTime.Now.AddDays(1);
+
+        // Act
+        var amount = await _repository.GetCurrentAmountAsync(budget, startDate, endDate);
+
+        // Assert
+        // 应该汇总两个分类的交易：50000 + 20000 = 70000
+        amount.Should().Be(70000);
+    }
 }