Fix: champs camelCase + anglais, contact data, nettoyage debug

- Blueprint site.yml : renommage en camelCase (contactEmail, contactAddress, socialLinks, legalNotices)
- Controller site.php : mentionsLegales() → legalNotices(), fix (string) casts pour la sérialisation JSON
- state/site.svelte.js : ajout champ contact
- Menu.svelte : nouveau composant dialog pour le menu overlay
- Header.svelte : intégration Menu, animation hamburger CSS
- router/index.js : suppression des console.log de debug

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

src/router/index.js

@@ -16,29 +16,19 @@ async function loadSlide(path) {
     slides.setLoading(path, true);
   }
 
-  console.log(`[router] loadSlide: ${path}`);
-
   try {
     const response = await fetch(`${path}.json`);
     if (!response.ok) throw new Error(`HTTP ${response.status}`);
     const data = await response.json();
 
-    console.log(`[router] fetch ok: ${path}`, {
-      template: data.template,
-      hasSite: !!data.site,
-      navigation: data.site?.navigation,
-    });
-
     if (!siteInitialized && data.site) {
       site.set(data.site);
       locale.initialize(data.site.language, data.site.languages);
       slides.init(data.site.navigation);
       siteInitialized = true;
-      console.log(`[router] slides initialized:`, slides.all.map(s => s.path));
     }
 
     slides.setData(path, data);
-    console.log(`[router] setData done: ${path}, slides loaded:`, slides.all.map(s => `${s.path}=${s.loaded}`));
   } catch (error) {
     console.error(`[router] Failed to load slide ${path}:`, error);
     slides.setLoading(path, false);
@@ -72,12 +62,10 @@ export function slideTo(path, { skipHistory = false } = {}) {
 
 export async function initRouter() {
   const initialPath = normalizePath(window.location.pathname);
-  console.log(`[router] initRouter, initialPath: ${initialPath}`);
 
   await loadSlide(initialPath);
 
   const idx = slides.getIndexByPath(initialPath);
-  console.log(`[router] after initial load, idx=${idx}, slides.all.length=${slides.all.length}`);
   if (idx !== -1) {
     slides.setActiveIndex(idx);
   }