Fix custom user role assignment

.changeset/little-melons-design.md

@@ -0,0 +1,5 @@
+---
+"wpgraphql-ide": patch
+---
+
+Fixes issue where custom capability was not being assigned to the administrator role. This now happens on plugin activation.

wpgraphql-ide.php

@@ -88,6 +88,32 @@ function show_admin_notice() {
 	<?php
 }
 
+/**
+ * Assign custom capability to administrator role on plugin activation.
+ */
+function wpgraphql_ide_activate() {
+    $administrator = get_role( 'administrator' );
+    if ( $administrator ) {
+        $administrator->add_cap( 'manage_graphql_ide' );
+    }
+}
+register_activation_hook( __FILE__, __NAMESPACE__ . '\\wpgraphql_ide_activate' );
+
+/**
+ * Adds custom capabilities to specified roles.
+ */
+function add_custom_capabilities(): void {
+    $capabilities = get_custom_capabilities();
+    $current_hash = generate_capabilities_hash( $capabilities );
+
+    if ( ! has_capabilities_hash_changed( $current_hash ) ) {
+        return;
+    }
+
+    update_roles_capabilities( $capabilities );
+    save_capabilities_hash( $current_hash );
+}
+
 /**
  * Retrieves the custom capabilities and their associated roles for the plugin.
  *
@@ -146,21 +172,6 @@ function save_capabilities_hash( $current_hash ): void {
 	update_option( 'wpgraphql_ide_capabilities', $current_hash );
 }
 
-/**
- * Adds custom capabilities to specified roles.
- */
-function add_custom_capabilities(): void {
-	$capabilities = get_custom_capabilities();
-	$current_hash = generate_capabilities_hash( $capabilities );
-
-	if ( ! has_capabilities_hash_changed( $current_hash ) ) {
-		return;
-	}
-
-	update_roles_capabilities( $capabilities );
-	save_capabilities_hash( $current_hash );
-}
-
 /**
  * Checks if the current user has the capability required to load scripts and styles for the GraphQL IDE.
  *