Fix PWA icons: separate any/maskable purpose, add manifest id, proper sizes

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config/packages/pwa.yaml

@@ -4,6 +4,7 @@ pwa:
         name: E-Ticket - Billetterie Associative
         short_name: E-Ticket
         description: Plateforme de billetterie en ligne pour associations - vente de tickets, brocantes, reservations et vote en ligne.
+        id: /
         start_url: /
         scope: /
         display: standalone
@@ -18,9 +19,13 @@ pwa:
             - events
         icons:
             - src: '%kernel.project_dir%/public/favicon.png'
-              sizes: 2048x2048
+              sizes: 512x512
               type: image/png
-              purpose: any maskable
+              purpose: any
+            - src: '%kernel.project_dir%/public/favicon.png'
+              sizes: 192x192
+              type: image/png
+              purpose: maskable
         shortcuts:
             - name: Evenements
               short_name: Events