Refactor: déplacer router et animations hors de state/

- src/state/router.js → src/router/index.js
- src/state/animations.js → src/utils/animations.js
- Ajout des alias @router et @utils dans vite.config.js
- Mise à jour des imports dans Header.svelte et main.js

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/layout/Header.svelte

@@ -2,7 +2,7 @@
   import { navigation } from '@state/navigation.svelte'
   import { locale } from '@state/locale.svelte'
   import { page } from '@state/page.svelte'
-  import { navigateTo } from '@state/router'
+  import { navigateTo } from '@router'
 
   const isMenuOpen = $derived(navigation.isMenuOpen)
   const currentLang = $derived(locale.current)

src/main.js

@@ -1,7 +1,7 @@
 import './styles/index.css'
 import App from './App.svelte'
 import { mount } from 'svelte'
-import { initRouter } from './state/router'
+import { initRouter } from './router'
 
 initRouter()
 

src/router/index.js

@@ -1,8 +1,8 @@
 import navaid from "navaid";
-import { page } from "./page.svelte";
-import { navigation } from "./navigation.svelte";
-import { site } from "./site.svelte";
-import { locale } from "./locale.svelte";
+import { page } from "@state/page.svelte";
+import { navigation } from "@state/navigation.svelte";
+import { site } from "@state/site.svelte";
+import { locale } from "@state/locale.svelte";
 
 export const router = navaid("/", () => {
   // Default handler

vite.config.js

@@ -12,7 +12,9 @@ export default defineConfig({
     alias: {
       '@components': path.resolve(__dirname, 'src/components'),
       '@views': path.resolve(__dirname, 'src/views'),
-      '@state': path.resolve(__dirname, 'src/state')
+      '@state': path.resolve(__dirname, 'src/state'),
+      '@router': path.resolve(__dirname, 'src/router'),
+      '@utils': path.resolve(__dirname, 'src/utils')
     }
   },
   server: {