Improve message reporting format

pkg/controller/index/contact.go

@@ -78,8 +78,19 @@ func Contact() http.HandlerFunc {
 
 				// Find this message, and attach it to the report.
 				if msg, err := models.GetMessage(uint64(tableID)); err == nil {
-					footer = fmt.Sprintf(
-						"\n\n---\n\nThe reported DM said:\n\n%s",
+					var username = "[unavailable]"
+					if sender, err := models.GetUser(msg.SourceUserID); err == nil {
+						username = sender.Username
+					}
+
+					footer = fmt.Sprintf(`
+
+---
+
+From: <a href="/u/%s">@%s</a>
+
+%s`,
+						username, username,
 						markdown.Quotify(msg.Message),
 					)
 				}