refactor(modules): 拆分多模块工程并收口common基础模块

frontend/src/api/attachments.ts

@@ -0,0 +1,31 @@
+import { post } from './request';
+
+export interface AttachmentUploadRequest {
+  file: File;
+  sourceType: string;
+  sourceId?: string;
+}
+
+export interface AttachmentResponse {
+  id: string;
+  sourceType: string;
+  sourceId?: string | null;
+  originalName: string;
+  fileName: string;
+  fileSuffix?: string | null;
+  contentType?: string | null;
+  fileSize: number;
+  storageType: string;
+  fileUrl?: string | null;
+  remark?: string | null;
+}
+
+export function uploadAttachment(data: AttachmentUploadRequest) {
+  const formData = new FormData();
+  formData.append('file', data.file);
+  formData.append('sourceType', data.sourceType);
+  if (data.sourceId) {
+    formData.append('sourceId', data.sourceId);
+  }
+  return post<AttachmentResponse, FormData>('/attachments/upload', formData);
+}