修复作品附件上传和显示功能

1. 后端 DTO 添加 attachments 字段
2. 后端 submit 方法使用事务创建作品和附件记录
3. 前端 SubmitWorkForm 添加 attachments 类型
4. 前端上传时将附件信息单独传递（不再合并到 files 中）

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

backend/src/contests/works/dto/submit-work.dto.ts

@@ -1,4 +1,21 @@
-import { IsString, IsInt, IsOptional, IsObject, IsArray } from 'class-validator';
+import { IsString, IsInt, IsOptional, IsObject, IsArray, ValidateNested } from 'class-validator';
+import { Type } from 'class-transformer';
+
+export class AttachmentDto {
+  @IsString()
+  fileName: string;
+
+  @IsString()
+  fileUrl: string;
+
+  @IsString()
+  @IsOptional()
+  fileType?: string;
+
+  @IsString()
+  @IsOptional()
+  size?: string;
+}
 
 export class SubmitWorkDto {
   @IsInt()
@@ -28,5 +45,11 @@ export class SubmitWorkDto {
   @IsObject()
   @IsOptional()
   aiModelMeta?: any;
+
+  @IsArray()
+  @ValidateNested({ each: true })
+  @Type(() => AttachmentDto)
+  @IsOptional()
+  attachments?: AttachmentDto[];
 }
 

backend/src/contests/works/works.service.ts

@@ -120,8 +120,33 @@ export class WorksService {
       creator: submitterUserId,
     };
 
-    return this.prisma.contestWork.create({
+    // 使用事务创建作品和附件
+    return this.prisma.$transaction(async (tx) => {
+      const work = await tx.contestWork.create({
         data,
+      });
+
+      // 创建附件记录
+      if (submitWorkDto.attachments && submitWorkDto.attachments.length > 0) {
+        for (const attachment of submitWorkDto.attachments) {
+          await tx.contestWorkAttachment.create({
+            data: {
+              tenantId,
+              contestId: registration.contestId,
+              workId: work.id,
+              fileName: attachment.fileName,
+              fileUrl: attachment.fileUrl,
+              fileType: attachment.fileType,
+              size: attachment.size,
+              creator: submitterUserId,
+            },
+          });
+        }
+      }
+
+      // 返回完整的作品信息
+      return tx.contestWork.findUnique({
+        where: { id: work.id },
         include: {
           contest: {
             select: {
@@ -143,6 +168,7 @@ export class WorksService {
           attachments: true,
         },
       });
+    });
   }
 
   /**

frontend/src/api/contests.ts

@@ -367,6 +367,13 @@ export interface ContestWorkAttachment {
   modifyTime?: string;
 }
 
+export interface SubmitWorkAttachment {
+  fileName: string;
+  fileUrl: string;
+  fileType?: string;
+  size?: string;
+}
+
 export interface SubmitWorkForm {
   registrationId: number;
   title: string;
@@ -375,6 +382,7 @@ export interface SubmitWorkForm {
   previewUrl?: string;
   previewUrls?: string[];
   aiModelMeta?: any;
+  attachments?: SubmitWorkAttachment[];
 }
 
 export interface QueryWorkParams extends PaginationParams {

frontend/src/views/contests/components/SubmitWorkDrawer.vue

@@ -553,7 +553,6 @@ const handleSubmit = async () => {
     let modelFiles: string[] = []
     let previewUrl = ""
     let previewUrlsList: string[] = []
-    const attachmentUrls: string[] = []
 
     if (uploadMode.value === "history") {
       // 从创作历史选择模式
@@ -611,11 +610,22 @@ const handleSubmit = async () => {
       }
     }
 
-    // 上传附件
+    // 上传附件并收集附件信息
+    const attachments: Array<{
+      fileName: string
+      fileUrl: string
+      fileType?: string
+      size?: string
+    }> = []
     for (const file of form.attachmentFiles) {
       try {
         const url = await uploadFile(file)
-        attachmentUrls.push(url)
+        attachments.push({
+          fileName: file.name,
+          fileUrl: url,
+          fileType: file.type || undefined,
+          size: String(file.size),
+        })
       } catch (error: any) {
         console.error("附件上传失败:", error)
       }
@@ -625,9 +635,10 @@ const handleSubmit = async () => {
       registrationId: registrationIdRef.value,
       title: form.title,
       description: form.description,
-      files: [...modelFiles, ...attachmentUrls],
+      files: modelFiles, // 只包含模型文件，不包含附件
       previewUrl: previewUrl,
       previewUrls: previewUrlsList.length > 0 ? previewUrlsList : undefined,
+      attachments: attachments.length > 0 ? attachments : undefined,
     }
 
     await worksApi.submit(submitData)