Refactor RSS widget

internal/glance/widget-utils.go

@@ -19,7 +19,6 @@ import (
 var (
 	errNoContent      = errors.New("failed to retrieve any content")
 	errPartialContent = errors.New("failed to retrieve some of the content")
-	errNotModified    = errors.New("content not modified")
 )
 
 const defaultClientTimeout = 5 * time.Second
@@ -39,6 +38,7 @@ type requestDoer interface {
 	Do(*http.Request) (*http.Response, error)
 }
 
+var glanceUserAgentString = "Glance/" + buildVersion + " +https://github.com/glanceapp/glance"
 var userAgentPersistentVersion atomic.Int32
 
 func setBrowserUserAgentHeader(request *http.Request) {