Fix/Feat: footer, newsletter, logo footerLogo, i18n, router formatting

- Footer : newsletter commentée, margin-top blog, text-align footer-col
- Blueprint site : logo → footerLogo (champ dédié au pied de page)
- Controller : logo → footerLogo
- i18n : newsletter_heading mis à jour (newsletters)
- site.svelte.js : retrait console.log debug
- router/index.js : reformatage quotes (linter)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/components/layout/Footer.svelte

@@ -79,7 +79,7 @@
     {/if}
 
     <!-- Newsletter -->
-    <div class="footer-newsletter">
+    <!-- <div class="footer-newsletter">
       <h3>{t('newsletter_heading')}</h3>
       <form class="footer-newsletter-form" onsubmit={handleSubscribe}>
         <input
@@ -96,7 +96,7 @@
           {status.message}
         </p>
       {/if}
-    </div>
+    </div> -->
 
   </div>
 
@@ -126,6 +126,7 @@
   
   :global(.blog .page-scrollable-footer) {
     margin-left: -12.4vw;
+    margin-top: 5rem;
   }
 
   /* --- Main row --- */
@@ -139,8 +140,7 @@
 
   /* --- Brand --- */
   .footer-brand img {
-    height: 40px;
-    width: auto;
+    width: 60px;
   }
 
   /* --- Info columns --- */
@@ -149,6 +149,7 @@
     flex-direction: column;
     gap: 16px;
     width: 136px;
+    text-align: left;
   }
 
   .footer-col h3 {

src/components/ui/LanguageSwitcher.svelte

@@ -16,15 +16,14 @@
 
 <style>
   .lang-switcher {
+    font-size: var(--font-size-paragraph-small);
     z-index: 60;
     position: absolute;
     bottom: 4vh;
     left: 4vh;
     text-transform: uppercase;
     color: rgb(4, 254, 160);
-    background: none;
-    border: none;
-    cursor: pointer;
-    padding: 0.75rem 1rem;
+    display: block;
+    background-color: transparent;
   }
 </style>