修复

src/Jiaowu.Api/Controllers/VenueDisplayAnnouncementsController.cs

@@ -92,13 +92,13 @@ public sealed class VenueDisplayAnnouncementsController(AppDbContext db) : Contr
 }
 
 public sealed record UpsertVenueDisplayAnnouncementRequest(
-    [property: Required, StringLength(120)] string Title,
-    [property: Required, StringLength(1000)] string Content,
+    [param: Required, StringLength(120)] string Title,
+    [param: Required, StringLength(1000)] string Content,
     VenueDisplayAnnouncementScope Scope,
     Guid? TargetId,
     bool IsPublished,
     bool IsPinned,
     bool IsUrgent,
-    [property: Range(0, 100)] int Priority,
+    [param: Range(0, 100)] int Priority,
     DateTime? StartsAt,
     DateTime? EndsAt);