fix(pwa): avoid CSP-blocked stylesheet deferral

ngsw-config.json

@@ -23,6 +23,7 @@
                 "files": [
                     "/assets/**",
                     "!/assets/app-config.js",
+                    "/media/**",
                     "/*.(svg|cur|jpg|jpeg|png|apng|webp|avif|gif|otf|ttf|woff|woff2)"
                 ]
             }