Enhance API error handling and response structure; update app name retrieval method

api/entrys/add.php

@@ -16,7 +16,8 @@ if (!isset($input["name"]) || !isset($input["text"])) {
     $api->answer(400, [
         "error" => "missing_fields",
         "error_text" => "Some fields are missing"
-    ]);
+    ], true);
+    return;
 }
 
 $html_allowed = $api->getSetting("allow_html");

api/entrys/get.php

@@ -21,6 +21,7 @@ if (!$result) {
         "entrys" => [],
         "empty" => true
     ]);
+    return;
 }
 
 foreach($result as $row) {