Fix camelCase naming and superglobal access issues

- Renamed methods to follow camelCase convention (initialize_hooks -> initializeHooks, enqueue_admin_assets -> enqueueAdminAssets)
- Renamed variables to follow camelCase convention (plugin_version -> pluginVersion)
- Replaced direct  superglobal access with filter_input() for better security
- Simplified commented-out code with a clear TODO comment

admin/css/admin-styles.css

@@ -124,7 +124,7 @@
 }
 
 /* Responsive Styles */
-@media screen and (width <= 782px) {
+@media screen and (max-width: 782px) {
 	.wpst-form-table th {
 		width: 100%;
 		display: block;