添加动图支持，优化图片和视频上传逻辑，调整超时设置，增强评论时间格式化

prisma/migrations/20251022131006_add_post_animation/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "ImageFile" ADD COLUMN     "animated" TEXT;

prisma/schema.prisma

@@ -143,6 +143,8 @@ model ImageFile {
   width     Int?
   height    Int?
 
+  animated  String?   // 如果是动图，存储 video 格式的 URL
+
   createdAt DateTime  @default(now())
   updatedAt DateTime  @updatedAt