Add full-calc

pages.go

@@ -10,8 +10,14 @@ import (
 )
 
 func mainPage(c *gin.Context) {
+	username, ok := session.GetUsername(c)
+	if !ok {
+		username = ""
+	}
+
 	data := map[string]interface{}{
 		"UserRole": controllers.GetUserRoleByCtx(c),
+		"Username": username,
 	}
 
 	err := utils.MainPageTemplates.Execute(c.Writer, data)