style: 合入后修 gofmt/govet 与 RegistrationView 类型检查

internal/admin/handler.go

@@ -1,7 +1,6 @@
 package admin
 
 import (
-	"errors"
 	"log/slog"
 	"net"
 	"net/http"
@@ -148,9 +147,7 @@ func New(d Deps) *Handler {
 // ServeHTTP 实现 http.Handler。按路由限制请求体大小与读截止时间。
 func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	limit, readFor := requestBodyBudget(r)
-	if err := http.NewResponseController(w).SetReadDeadline(time.Now().Add(readFor)); err != nil && !errors.Is(err, http.ErrNotSupported) {
-		// 测试用 ResponseRecorder 或不支持截止时间的封装：忽略。
-	}
+	_ = http.NewResponseController(w).SetReadDeadline(time.Now().Add(readFor))
 	if r.Body != nil {
 		r.Body = http.MaxBytesReader(w, r.Body, limit)
 	}