feat: rename qiniu to oss, add admin upload proxy with thumbnail, add dev-login

- Rename all QINIU_* config/code/docs to OSS_* to match actual Alibaba Cloud OSS
- Refactor upload module from internal/common/qiniu to internal/common/upload
- Add backend proxy upload endpoint (POST /api/admin/marketing/upload) to avoid CORS
- Auto-generate compressed thumbnail (800px, JPEG 80%) on admin image upload
- Add dev-login endpoint (POST /api/v1/auth/dev-login) for H5 debugging
- Add imageutil package for server-side image resizing

Made-with: Cursor

cmd/api/main.go

@@ -11,8 +11,8 @@ import (
 	adminmodule "wx_service/internal/admin"
 	authhandler "wx_service/internal/common/auth/handler"
 	authservice "wx_service/internal/common/auth/service"
-	qiniuhandler "wx_service/internal/common/qiniu/handler"
-	qiniuservice "wx_service/internal/common/qiniu/service"
+	uploadhandler "wx_service/internal/common/upload/handler"
+	uploadservice "wx_service/internal/common/upload/service"
 	rediscache "wx_service/internal/common/redis/cache"
 	redisservice "wx_service/internal/common/redis/service"
 	oahandler "wx_service/internal/common/wechat_official/handler"
@@ -123,8 +123,8 @@ func main() {
 	redeemCodeService := membershipservice.NewRedeemCodeService(database.DB, config.AppConfig.Admin.Token)
 	redeemCodeHandler := membershiphandler.NewRedeemCodeHandler(redeemCodeService)
 
-	qiniuService := qiniuservice.NewQiniuService(config.AppConfig.Qiniu)
-	uploadHandler := qiniuhandler.NewUploadHandler(qiniuService)
+	uploadSvc := uploadservice.NewUploadService(config.AppConfig.OSS)
+	uploadHandler := uploadhandler.NewUploadHandler(uploadSvc)
 
 	oaService := oaservice.NewWeChatOAService(config.AppConfig.WeChatOA)
 	oaOAuthHandler := oahandler.NewOAuthHandler(oaService)