Attemping to fix bulk upload problem

handler/template.go

@@ -1,9 +1,10 @@
 package handler
 
 import (
+	"bytes"
 	"html/template"
-	"io"
 	"log"
+	"net/http"
 )
 
 type Templates struct {
@@ -13,8 +14,12 @@ type Templates struct {
 func NewTemplates(tmpl *template.Template) *Templates {
 	return &Templates{tmpl: tmpl}
 }
-func (t *Templates) Render(w io.Writer, name string, data any) {
-	if err := t.tmpl.ExecuteTemplate(w, name+".html", data); err != nil {
+func (t *Templates) Render(w http.ResponseWriter, name string, data any) {
+	var buf bytes.Buffer
+	if err := t.tmpl.ExecuteTemplate(&buf, name+".html", data); err != nil {
 		log.Printf("template error: %s: %v", name, err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
 	}
+	w.Write(buf.Bytes())
 }