Refactor entry handling: update date format, enhance entry retrieval, and improve HTML structure

api/settings/appname.php

@@ -9,5 +9,5 @@ $command = "SELECT name, value FROM settings WHERE name = :name";
 $result = $api->dbCommand($command, true, true, [":name" => "application_name"]);
 
 $api->answer(200, [
-    "application_name" => $result["value"]
+    "application_name" => $result[0]["value"]
 ]);