diff --git a/backend/src/Health.WebApi/Endpoints/health_endpoints.cs b/backend/src/Health.WebApi/Endpoints/health_endpoints.cs
index f0ab047..be06330 100644
--- a/backend/src/Health.WebApi/Endpoints/health_endpoints.cs
+++ b/backend/src/Health.WebApi/Endpoints/health_endpoints.cs
@@ -122,6 +122,13 @@ public static class HealthEndpoints
         Guid.TryParse(http.User.FindFirst(System.Security.Claims.ClaimTypes.NameIdentifier)?.Value, out var id) ? id : Guid.Empty;
 }
 
-public sealed record CreateHealthRecordRequest(
-    HealthMetricType Type, int? Systolic, int? Diastolic, decimal? Value,
-    string? Unit, HealthRecordSource Source, DateTime? RecordedAt);
+public sealed class CreateHealthRecordRequest
+{
+    public HealthMetricType Type { get; init; }
+    public int? Systolic { get; init; }
+    public int? Diastolic { get; init; }
+    public decimal? Value { get; init; }
+    public string? Unit { get; init; }
+    public HealthRecordSource Source { get; init; }
+    public DateTime? RecordedAt { get; init; }
+}
diff --git a/backend/src/Health.WebApi/Endpoints/remaining_endpoints.cs b/backend/src/Health.WebApi/Endpoints/remaining_endpoints.cs
index 68c295c..e235104 100644
--- a/backend/src/Health.WebApi/Endpoints/remaining_endpoints.cs
+++ b/backend/src/Health.WebApi/Endpoints/remaining_endpoints.cs
@@ -193,7 +193,21 @@ public static class RemainingEndpoints
             var today = DateOnly.FromDateTime(DateTime.Now);
             var monday = today.AddDays(-(int)today.DayOfWeek + 1);
             var plan = await db.ExercisePlans.Include(p => p.Items).FirstOrDefaultAsync(p => p.UserId == userId && p.WeekStartDate == monday);
-            return Results.Ok(new { code = 0, data = plan, message = (string?)null });
+            if (plan == null) return Results.Ok(new { code = 0, data = (object?)null, message = (string?)null });
+            return Results.Ok(new
+            {
+                code = 0,
+                data = new
+                {
+                    plan.Id, plan.WeekStartDate, plan.CreatedAt, plan.UpdatedAt,
+                    items = plan.Items.Select(i => new
+                    {
+                        i.Id, i.DayOfWeek, i.ExerciseType, i.DurationMinutes,
+                        i.IsCompleted, i.CompletedAt, i.IsRestDay
+                    })
+                },
+                message = (string?)null
+            });
         });
 
         group.MapPost("/", async (CreateExercisePlanRequest req, HttpContext http, AppDbContext db, CancellationToken ct) =>
diff --git a/backend/src/Health.WebApi/Program.cs b/backend/src/Health.WebApi/Program.cs
index c3dc020..1329c34 100644
--- a/backend/src/Health.WebApi/Program.cs
+++ b/backend/src/Health.WebApi/Program.cs
@@ -27,6 +27,14 @@ if (File.Exists(envPath))
 
 var builder = WebApplication.CreateBuilder(args);
 
+// ---- JSON 配置（枚举字符串、camelCase）----
+builder.Services.ConfigureHttpJsonOptions(options =>
+{
+    options.SerializerOptions.Converters.Add(new System.Text.Json.Serialization.JsonStringEnumConverter());
+    options.SerializerOptions.PropertyNamingPolicy = System.Text.Json.JsonNamingPolicy.CamelCase;
+    options.SerializerOptions.PropertyNameCaseInsensitive = true;
+});
+
 // ---- 数据库 ----
 builder.Services.AddDbContext<AppDbContext>(options =>
     options.UseNpgsql(builder.Configuration.GetConnectionString("Default") ?? builder.Configuration["DB_CONNECTION"] ?? "Host=localhost;Database=health_manager;Username=postgres;Password=postgres"));