Reduce fetch count: config partagee + suppression doublons internet

- topbar-logo.js expose la config via event 'nebuleair-config-ready'
- wifi.html ecoute l'event au lieu de re-fetcher get_config_sqlite
- Supprime le doublon load_ethernet_info (get_internet fait deja tout)
- Passe de ~9 requetes simultanees a ~5 au chargement

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

html/assets/js/topbar-logo.js

@@ -9,12 +9,15 @@
 document.addEventListener('DOMContentLoaded', () => {
     let config = null;
 
-    // Fetch config once
+    // Fetch config once and share globally
     fetch('launcher.php?type=get_config_sqlite')
         .then(response => response.json())
         .then(data => {
             config = data;
-            applyConfig(); // Apply immediately if elements are ready
+            window._nebuleairConfig = data;
+            applyConfig();
+            // Notify other scripts that config is ready
+            document.dispatchEvent(new CustomEvent('nebuleair-config-ready', { detail: data }));
         })
         .catch(error => console.error('Error loading config:', error));