feat(webui): bootstrap a proper UI

pkg/webui/error.go

@@ -9,11 +9,13 @@ var errorTemplates = template.Must(template.ParseFS(htmlFS, "html/base.html", "h
 
 func errorResponse(w http.ResponseWriter, status int, err error) {
 	type ErrorData struct {
+		Page
 		Err        error
 		Status     int
 		StatusText string
 	}
 	render(w, errorTemplates, status, &ErrorData{
+		Page:       Page{Title: "Error", Section: "error"},
 		Err:        err,
 		Status:     status,
 		StatusText: http.StatusText(status),