feat(api): StorageService 支持 MINIO_PUBLIC_URL 配置

- 添加 publicUrl 配置支持外部访问地址
- getPresignedUrl 方法自动替换内部地址为公开地址
- 移除已迁移到 file 模块的路径前缀常量

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

apps/api/src/common/storage/storage.constants.ts

@@ -14,11 +14,3 @@ export const GLOBAL_ALLOWED_TYPES = [
 
 // 全局最大文件大小（10MB）
 export const GLOBAL_MAX_FILE_SIZE = 10 * 1024 * 1024;
-
-// ============ 存储路径前缀 ============
-
-// 头像存储路径前缀
-export const AVATAR_PREFIX = 'avatars';
-
-// 附件存储路径前缀
-export const ATTACHMENT_PREFIX = 'attachments';

apps/api/src/common/storage/storage.service.ts

@@ -8,16 +8,25 @@ export class StorageService implements OnModuleInit {
   private readonly logger = new Logger(StorageService.name);
   private client: Minio.Client;
   private bucket: string;
+  private publicUrl: string | null;
 
   constructor(private configService: ConfigService) {
+    const endpoint = this.configService.get('MINIO_ENDPOINT', 'localhost');
+    const port = parseInt(this.configService.get('MINIO_PORT', '9000'), 10);
+    const useSSL = this.configService.get('MINIO_USE_SSL', 'false') === 'true';
+
     this.client = new Minio.Client({
-      endPoint: this.configService.get('MINIO_ENDPOINT', 'localhost'),
-      port: parseInt(this.configService.get('MINIO_PORT', '9000'), 10),
-      useSSL: this.configService.get('MINIO_USE_SSL', 'false') === 'true',
+      endPoint: endpoint,
+      port,
+      useSSL,
       accessKey: this.configService.get('MINIO_ACCESS_KEY', 'minioadmin'),
       secretKey: this.configService.get('MINIO_SECRET_KEY', 'minioadmin'),
     });
     this.bucket = this.configService.get('MINIO_BUCKET', 'seclusion');
+
+    // 公开访问 URL（用于替换 presigned URL 中的内部地址）
+    const publicUrlConfig = this.configService.get<string>('MINIO_PUBLIC_URL');
+    this.publicUrl = publicUrlConfig?.trim() || null;
   }
 
   async onModuleInit() {
@@ -63,6 +72,17 @@ export class StorageService implements OnModuleInit {
    * @param expiresIn 有效期（秒）
    */
   async getPresignedUrl(objectName: string, expiresIn: number): Promise<string> {
-    return this.client.presignedGetObject(this.bucket, objectName, expiresIn);
+    const url = await this.client.presignedGetObject(this.bucket, objectName, expiresIn);
+
+    // 如果配置了公开访问 URL，替换内部地址
+    if (this.publicUrl) {
+      const urlObj = new URL(url);
+      const publicUrlObj = new URL(this.publicUrl);
+      urlObj.protocol = publicUrlObj.protocol;
+      urlObj.host = publicUrlObj.host;
+      return urlObj.toString();
+    }
+
+    return url;
   }
 }