feat: 移除预算相关的停止状态属性和相关功能，简化预算管理逻辑

Service/BudgetService.cs

@@ -161,9 +161,9 @@ public class BudgetService(
             Count = 0
         };
 
-        // 获取当前分类下所有未停止的预算
+        // 获取当前分类下所有预算
         var relevant = budgets
-            .Where(b => b.Category == category && !b.IsStopped)
+            .Where(b => b.Category == category)
             .ToList();
 
         if (relevant.Count == 0)
@@ -409,8 +409,6 @@ public class BudgetService(
 
     private async Task<decimal> CalculateCurrentAmountAsync(BudgetRecord budget, DateTime? now = null)
     {
-        if (budget.IsStopped) return 0;
-
         var referenceDate = now ?? DateTime.Now;
         var (startDate, endDate) = GetPeriodRange(budget.StartDate, budget.Type, referenceDate);
 
@@ -468,7 +466,7 @@ public class BudgetService(
 
         foreach (var b in allBudgets)
         {
-            if (b.IsStopped || b.Category == BudgetCategory.Savings) continue;
+            if (b.Category == BudgetCategory.Savings) continue;
 
             // 折算系数：根据当前请求的 periodType (Year 或 Month)，将预算 b 的 Limit 折算过来
             decimal factor = 1.0m;
@@ -589,7 +587,6 @@ public record BudgetResult
     public decimal Current { get; set; }
     public BudgetCategory Category { get; set; }
     public string[] SelectedCategories { get; set; } = Array.Empty<string>();
-    public bool IsStopped { get; set; }
     public string StartDate { get; set; } = string.Empty;
     public string Period { get; set; } = string.Empty;
     public DateTime? PeriodStart { get; set; }
@@ -617,7 +614,6 @@ public record BudgetResult
             SelectedCategories = string.IsNullOrEmpty(entity.SelectedCategories)
                 ? Array.Empty<string>()
                 : entity.SelectedCategories.Split(','),
-            IsStopped = entity.IsStopped,
             StartDate = entity.StartDate.ToString("yyyy-MM-dd"),
             Period = entity.Type switch
             {