removed granim, replaced with generated static css gradient

src/components/MapConcernements.vue

@@ -3,7 +3,7 @@
 // import { mapActions, mapState } from 'pinia'
 import { computed } from 'vue'
 import { nextTick } from 'vue'
-import MapBackground from '@components/MapBackground.vue'
+import MapGradientBackground from '@components/MapGradientBackground.vue'
 
 // https://brm.io/matter-js/docs/classes/Engine.html
 import Matter from "matter-js";
@@ -1478,7 +1478,7 @@ export default {
   beforeUpdate () {
   },
   components: {
-    MapBackground,
+    MapGradientBackground,
     ConcernementMapPopup,
     RecitPlayer
   }
@@ -1488,7 +1488,7 @@ export default {
 
 <template>
   <div id="map-backgrounds">
-    <MapBackground />
+    <MapGradientBackground />
   </div>
   <!-- <div id="map-matter">
     <canvas ref="canvas-engine"></canvas>