Fix quality parameter fallback in ImgixService (#10)

* Fix quality parameter fallback in ImgixService

* Add release notes for version 5.0.2

Update CHANGELOG with release notes for version 5.0.2.

Author: iainsaxon

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Release Notes for Imgix Asset Transformer for Craft CMS
 
+## 5.0.2 - 2026-05-28
+
+### Fixed
+
+- Imgix transforms use the `q` value defined in the global or volume-specific `imgixDefaultParams` settings
+
 ## 5.0.1 - 2026-04-14
 
 ### Fixed

src/services/ImgixService.php

@@ -111,7 +111,7 @@ public function generateUrl(Asset $asset, mixed $transform = null): ?string
             $httpQueryParams = array_merge($httpQueryParams, [
                 'w' => $targetWidth,
                 'h' => $targetHeight,
-                'q' => $transform->quality ?: Craft::$app->config->general->defaultImageQuality,
+                'q' => $transform->quality ?: ($httpQueryParams['q'] ?? Craft::$app->config->general->defaultImageQuality),
                 'fm' => $transform->format ?: ($httpQueryParams['fm'] ?? null),
                 'fit' => $imgixFit,
             ]);