diff --git a/SimpleAdmin.sln.DotSettings.user b/SimpleAdmin.sln.DotSettings.user
index 71de70b..c58fa73 100644
--- a/SimpleAdmin.sln.DotSettings.user
+++ b/SimpleAdmin.sln.DotSettings.user
@@ -1,4 +1,5 @@
 <wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AClient_002Ecs_002Fl_003AC_0021_003FUsers_003FBSI_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FSourcesCache_003Fc7d66b24252bb52da52d1262d99fd654ffc18aedde818f147c3daf6aee3e63_003FClient_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AIAggregateRoot_002Ecs_002Fl_003AC_0021_003FUsers_003FBSI_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F6015bad29db142679ead208ae4ecd55c7800_003F0e_003F66feb813_003FIAggregateRoot_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AIAggregateRoot_00601_002Ecs_002Fl_003AC_0021_003FUsers_003FBSI_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F6015bad29db142679ead208ae4ecd55c7800_003F9a_003Fea4337c7_003FIAggregateRoot_00601_002Ecs/@EntryIndexedValue">ForceIncluded</s:String>
 	<s:String x:Key="/Default/CodeInspection/ExcludedFiles/FilesAndFoldersToSkip2/=7020124F_002D9FFC_002D4AC3_002D8F3D_002DAAB8E0240759_002Ff_003AIRepository_00601_002Ecs_002Fl_003AC_0021_003FUsers_003FBSI_003FAppData_003FRoaming_003FJetBrains_003FRider2025_002E1_003Fresharper_002Dhost_003FDecompilerCache_003Fdecompiler_003F6015bad29db142679ead208ae4ecd55c7800_003F85_003Fa6db724e_003FIRepository_00601_002Ecs/@EntryIndexedValue">ForceIncluded</s:String></wpf:ResourceDictionary>
\ No newline at end of file
diff --git a/src/Oms.Application/Dtos/Orders/OrderExportInput.cs b/src/Oms.Application/Dtos/Orders/OrderExportInput.cs
index 60d80cb..8264eb0 100644
--- a/src/Oms.Application/Dtos/Orders/OrderExportInput.cs
+++ b/src/Oms.Application/Dtos/Orders/OrderExportInput.cs
@@ -1,12 +1,27 @@
 namespace Oms.Application.Dtos.Orders;
 
+/// <summary>
+/// 订单导出入参。
+/// </summary>
 public class OrderExportInput
 {
+    /// <summary>
+    /// 订单状态，传 <c>all</c> 或空值时表示不过滤。
+    /// </summary>
     public string? Status { get; set; }
 
+    /// <summary>
+    /// 关键词，可匹配运单号、客户单号、跟踪号。
+    /// </summary>
     public string? Keyword { get; set; }
 
+    /// <summary>
+    /// 创建时间起始值。
+    /// </summary>
     public DateTime? CreateTimeStart { get; set; }
 
+    /// <summary>
+    /// 创建时间结束值。
+    /// </summary>
     public DateTime? CreateTimeEnd { get; set; }
 }
diff --git a/src/Oms.Application/Dtos/Orders/OrderPaginatedInput.cs b/src/Oms.Application/Dtos/Orders/OrderPaginatedInput.cs
index 5cd22c1..4aacae7 100644
--- a/src/Oms.Application/Dtos/Orders/OrderPaginatedInput.cs
+++ b/src/Oms.Application/Dtos/Orders/OrderPaginatedInput.cs
@@ -1,16 +1,37 @@
 namespace Oms.Application.Dtos.Orders;
 
+/// <summary>
+/// 订单列表分页查询入参。
+/// </summary>
 public class OrderPaginatedInput
 {
+    /// <summary>
+    /// 页码，从 1 开始。
+    /// </summary>
     public int Page { get; set; } = 1;
 
+    /// <summary>
+    /// 每页条数。
+    /// </summary>
     public int PageSize { get; set; } = 20;
 
+    /// <summary>
+    /// 订单状态，传 <c>all</c> 或空值时表示不过滤。
+    /// </summary>
     public string? Status { get; set; }
 
+    /// <summary>
+    /// 关键词，可匹配运单号、客户单号、跟踪号。
+    /// </summary>
     public string? Keyword { get; set; }
 
+    /// <summary>
+    /// 创建时间起始值。
+    /// </summary>
     public DateTime? CreateTimeStart { get; set; }
 
+    /// <summary>
+    /// 创建时间结束值。
+    /// </summary>
     public DateTime? CreateTimeEnd { get; set; }
 }
diff --git a/src/Oms.Application/Dtos/Recharge/RechargeExportInput.cs b/src/Oms.Application/Dtos/Recharge/RechargeExportInput.cs
index 4075f57..b4815ea 100644
--- a/src/Oms.Application/Dtos/Recharge/RechargeExportInput.cs
+++ b/src/Oms.Application/Dtos/Recharge/RechargeExportInput.cs
@@ -1,10 +1,22 @@
 namespace Oms.Application.Dtos.Recharge;
 
+/// <summary>
+/// 充值记录导出入参。
+/// </summary>
 public class RechargeExportInput
 {
+    /// <summary>
+    /// 客户 ID，空值表示不过滤。
+    /// </summary>
     public long? CustomerId { get; set; }
 
+    /// <summary>
+    /// 充值时间起始值。
+    /// </summary>
     public DateTime? StartTime { get; set; }
 
+    /// <summary>
+    /// 充值时间结束值。
+    /// </summary>
     public DateTime? EndTime { get; set; }
 }
diff --git a/src/Oms.Application/Dtos/Recharge/RechargeRecordPaginatedInput.cs b/src/Oms.Application/Dtos/Recharge/RechargeRecordPaginatedInput.cs
index 77c7d45..27041e0 100644
--- a/src/Oms.Application/Dtos/Recharge/RechargeRecordPaginatedInput.cs
+++ b/src/Oms.Application/Dtos/Recharge/RechargeRecordPaginatedInput.cs
@@ -2,19 +2,43 @@ using Oms.Domain.RechargeAggregate.Enums;
 
 namespace Oms.Application.Dtos.Recharge;
 
+/// <summary>
+/// 充值记录分页查询入参。
+/// </summary>
 public class RechargeRecordPaginatedInput
 {
+    /// <summary>
+    /// 页码，从 1 开始。
+    /// </summary>
     public int Page { get; set; } = 1;
 
+    /// <summary>
+    /// 每页条数。
+    /// </summary>
     public int PageSize { get; set; } = 20;
 
+    /// <summary>
+    /// 客户 ID，空值表示不过滤。
+    /// </summary>
     public long? CustomerId { get; set; }
 
+    /// <summary>
+    /// 充值流水号，支持模糊匹配。
+    /// </summary>
     public string? SerialNumber { get; set; }
 
+    /// <summary>
+    /// 充值审核状态，空值表示不过滤。
+    /// </summary>
     public RechargeStatus? RechargeStatus { get; set; }
 
+    /// <summary>
+    /// 充值时间起始值。
+    /// </summary>
     public DateTime? StartTime { get; set; }
 
+    /// <summary>
+    /// 充值时间结束值。
+    /// </summary>
     public DateTime? EndTime { get; set; }
 }
diff --git a/src/Oms.Application/Services/Orders/OrderService.cs b/src/Oms.Application/Services/Orders/OrderService.cs
index 1580586..63ee798 100644
--- a/src/Oms.Application/Services/Orders/OrderService.cs
+++ b/src/Oms.Application/Services/Orders/OrderService.cs
@@ -25,6 +25,17 @@ public partial class OrderService : ApplicationService
     private ISalesProductRepository SalesProductRepository => LazyServiceProvider.GetRequiredService<ISalesProductRepository>();
     private IWebHostEnvironment WebHostEnvironment => LazyServiceProvider.GetRequiredService<IWebHostEnvironment>();
 
+    /// <summary>
+    /// 分页查询订单列表。
+    /// </summary>
+    /// <param name="input">入参：分页信息、订单状态、关键词、创建时间起止。</param>
+    /// <returns>出参：订单分页结果，包含当前页订单集合和总记录数。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：
+    /// 1. 统一归一化页码和页大小；
+    /// 2. 根据状态、关键词、创建时间区间构造筛选表达式；
+    /// 3. 查询分页数据后补齐订单展示所需的映射字段。
+    /// </remarks>
     [HttpPost("/order/list")]
     public async Task<OmsPageResult<OrderOutput>> GetPaginatedListAsync(OrderPaginatedInput input)
     {
@@ -97,6 +108,14 @@ public partial class OrderService : ApplicationService
         return new OrderPrintOutput { PrintUrl = printUrl };
     }
 
+    /// <summary>
+    /// 导出订单列表。
+    /// </summary>
+    /// <param name="input">入参：订单状态、关键词、创建时间起止。</param>
+    /// <returns>出参：导出文件下载地址及失效时间。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：先清理过期文件，再按筛选条件查询订单，最后生成 Excel 并返回下载信息。
+    /// </remarks>
     [HttpPost("/order/export")]
     public async Task<OrderExportOutput> ExportAsync(OrderExportInput input)
     {
@@ -159,16 +178,41 @@ public partial class OrderService : ApplicationService
         return await CreateParcelCoreAsync(input);
     }
 
+    /// <summary>
+    /// 将订单列表请求对象转换为仓储可执行的查询表达式。
+    /// </summary>
+    /// <param name="input">入参：分页查询条件对象。</param>
+    /// <returns>出参：订单查询表达式。</returns>
     private Expression<Func<Order, bool>> BuildPaginatedPredicate(OrderPaginatedInput input)
     {
         return BuildOrderPredicate(input.Status, input.Keyword, input.CreateTimeStart, input.CreateTimeEnd);
     }
 
+    /// <summary>
+    /// 将订单导出请求对象转换为仓储可执行的查询表达式。
+    /// </summary>
+    /// <param name="input">入参：导出筛选条件对象。</param>
+    /// <returns>出参：订单查询表达式。</returns>
     private Expression<Func<Order, bool>> BuildExportPredicate(OrderExportInput input)
     {
         return BuildOrderPredicate(input.Status, input.Keyword, input.CreateTimeStart, input.CreateTimeEnd);
     }
 
+    /// <summary>
+    /// 统一构造订单查询条件。
+    /// </summary>
+    /// <param name="status">入参：订单状态，传入 <c>all</c> 或空值时表示不按状态过滤。</param>
+    /// <param name="keyword">入参：关键词，可匹配运单号、客户单号、跟踪号。</param>
+    /// <param name="createTimeStart">入参：创建时间开始值。</param>
+    /// <param name="createTimeEnd">入参：创建时间结束值。</param>
+    /// <returns>出参：可直接交给 SqlSugar 仓储执行的订单筛选表达式。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：
+    /// 1. 先把状态和关键词做统一清洗；
+    /// 2. 再按时间区间是否存在拆分成不同表达式；
+    /// 3. 避免把 <see cref="Nullable{T}.HasValue"/> / <see cref="Nullable{T}.Value"/> 放进可翻译 SQL 的表达式中，
+    ///    从而规避 MySQL 下时间条件被错误翻译的问题。
+    /// </remarks>
     private static Expression<Func<Order, bool>> BuildOrderPredicate(
         string? status,
         string? keyword,
@@ -180,6 +224,7 @@ public partial class OrderService : ApplicationService
         var hasStatusFilter = !string.IsNullOrWhiteSpace(status) && status != "all";
         var hasKeywordFilter = !string.IsNullOrWhiteSpace(keyword);
 
+        // 显式拆开时间分支，避免 SqlSugar 在翻译 Nullable<DateTime> 判空时生成异常 SQL。
         if (createTimeStart.HasValue && createTimeEnd.HasValue)
         {
             var start = createTimeStart.Value;
diff --git a/src/Oms.Application/Services/Recharge/RechargeService.cs b/src/Oms.Application/Services/Recharge/RechargeService.cs
index 07e96dd..75a458b 100644
--- a/src/Oms.Application/Services/Recharge/RechargeService.cs
+++ b/src/Oms.Application/Services/Recharge/RechargeService.cs
@@ -106,6 +106,17 @@ public class RechargeService : ApplicationService
         await RechargeRecordRepository.UpdateAsync(record);
     }
 
+    /// <summary>
+    /// 分页查询充值记录列表。
+    /// </summary>
+    /// <param name="input">入参：分页信息、客户、充值流水号、审核状态、充值时间区间。</param>
+    /// <returns>出参：充值记录分页结果，包含列表数据和总记录数。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：
+    /// 1. 先根据筛选条件查询充值记录；
+    /// 2. 再批量补齐客户编码和手机号等展示字段；
+    /// 3. 最后返回前端可直接渲染的分页结果。
+    /// </remarks>
     [HttpGet("/recharge/recharge-record/list")]
     public async Task<OmsPageResult<RechargeRecordPaginatedOutput>> GetPaginatedListAsync([FromQuery] RechargeRecordPaginatedInput input)
     {
@@ -127,6 +138,7 @@ public class RechargeService : ApplicationService
             : await CustomerRepository.GetListAsync(x => !x.IsDeleted && customerIds.Contains(x.Id));
         var customerMap = customers.ToDictionary(x => x.Id);
 
+        // 列表返回时补齐客户信息，避免前端为了展示字段额外发起关联查询。
         foreach (var entity in entities)
         {
             var output = ObjectMapper.Map<RechargeRecord, RechargeRecordPaginatedOutput>(entity);
@@ -149,6 +161,14 @@ public class RechargeService : ApplicationService
         };
     }
 
+    /// <summary>
+    /// 导出充值记录。
+    /// </summary>
+    /// <param name="input">入参：客户和充值时间区间。</param>
+    /// <returns>出参：Excel 文件内容。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：根据导出条件查询充值记录，补齐客户展示字段后直接生成 Excel 文件流。
+    /// </remarks>
     [HttpGet("/recharge/export")]
     public async Task<FileContentResult> ExportAsync([FromQuery] RechargeExportInput input)
     {
@@ -189,6 +209,11 @@ public class RechargeService : ApplicationService
         };
     }
 
+    /// <summary>
+    /// 将充值分页请求对象转换为仓储可执行的查询表达式。
+    /// </summary>
+    /// <param name="input">入参：充值分页查询条件对象。</param>
+    /// <returns>出参：充值记录查询表达式。</returns>
     private Expression<Func<RechargeRecord, bool>> BuildPaginatedPredicate(RechargeRecordPaginatedInput input)
     {
         var serialNumber = input.SerialNumber?.Trim();
@@ -241,11 +266,31 @@ public class RechargeService : ApplicationService
         };
     }
 
+    /// <summary>
+    /// 将充值导出请求对象转换为仓储可执行的查询表达式。
+    /// </summary>
+    /// <param name="input">入参：充值导出筛选条件对象。</param>
+    /// <returns>出参：充值记录查询表达式。</returns>
     private Expression<Func<RechargeRecord, bool>> BuildExportPredicate(RechargeExportInput input)
     {
         return BuildRechargePredicate(input.CustomerId, null, null, input.StartTime, input.EndTime);
     }
 
+    /// <summary>
+    /// 统一构造充值记录查询条件。
+    /// </summary>
+    /// <param name="customerId">入参：客户 ID，空值表示不过滤。</param>
+    /// <param name="rechargeStatus">入参：充值状态，空值表示不过滤。</param>
+    /// <param name="serialNumber">入参：充值流水号关键词，空值表示不过滤。</param>
+    /// <param name="startTime">入参：充值时间开始值。</param>
+    /// <param name="endTime">入参：充值时间结束值。</param>
+    /// <returns>出参：可直接交给 SqlSugar 仓储执行的充值记录筛选表达式。</returns>
+    /// <remarks>
+    /// 核心业务逻辑：
+    /// 1. 将可选筛选条件先转换成布尔开关和值；
+    /// 2. 根据时间区间是否存在拆分表达式；
+    /// 3. 避免在 SQL 翻译阶段混用 Nullable 时间判空和比较，降低生成异常 SQL 的风险。
+    /// </remarks>
     private static Expression<Func<RechargeRecord, bool>> BuildRechargePredicate(
         long? customerId,
         RechargeStatus? rechargeStatus,
@@ -259,6 +304,7 @@ public class RechargeService : ApplicationService
         var rechargeStatusValue = rechargeStatus.GetValueOrDefault();
         var hasSerialNumberFilter = !string.IsNullOrWhiteSpace(serialNumber);
 
+        // 显式拆开时间分支，保证 ORM 只翻译纯比较表达式。
         if (startTime.HasValue && endTime.HasValue)
         {
             var start = startTime.Value;
diff --git a/src/SimpleAdmin.Api/SimpleAdmin.Api.csproj b/src/SimpleAdmin.Api/SimpleAdmin.Api.csproj
index 3b0de97..dba2e2d 100644
--- a/src/SimpleAdmin.Api/SimpleAdmin.Api.csproj
+++ b/src/SimpleAdmin.Api/SimpleAdmin.Api.csproj
@@ -4,7 +4,6 @@
     <TargetFramework>net8.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
-    <UserSecretsId>e3d506cf-f5ce-4ba5-bc8e-ab2c179f3034</UserSecretsId>
     <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
   </PropertyGroup>