Ne montrer la modale explicative "faux PLF" qu'une seule fois

src/lib/components/IntroWarningBillModale.svelte

@@ -12,6 +12,7 @@
   import { page } from "$app/stores"
   import CopyClipboard from "$lib/components/CopyClipboard.svelte"
   import type { ParametricReform } from "$lib/reforms"
+  import { browser } from "$app/environment"
 
   export let isOpen = false
 
@@ -64,9 +65,14 @@
     isOpen = false
   }
 
+  $: if (browser) {
+    if (localStorage.getItem("hideWarningBillModal") === null) {
+      localStorage.setItem("hideWarningBillModal", "true")
       setTimeout(() => {
         isOpen = true
-  }, 10000) // Affiche la modale après 30 secondes
+      }, 10000) // Affiche la modale après 10 secondes
+    }
+  }
 </script>
 
 <Transition appear show={isOpen}>