Revert optimisations sidebar/fetch qui causaient des blocages navigateur

Retour a l'etat 408ab76. Les tentatives d'optimisation du nombre
de fetch (sidebar unique, config partagee, sequencement) causaient
des blocages sur Chrome/Firefox. On garde les features (forget wifi,
hotspot badge, UI wifi) mais on revient au chargement d'origine.

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

html/assets/js/topbar-logo.js

@@ -5,31 +5,25 @@
  * - Shows/Hides "Screen" sidebar tab based on device type
  * - Updates sidebar device name
  * - Shows hotspot badge in sidebar when in hotspot mode
- *
- * Fetches config at window.onload (not DOMContentLoaded) to avoid
- * saturating the browser's 6-connection-per-domain limit.
  */
-(function() {
+document.addEventListener('DOMContentLoaded', () => {
     let config = null;
 
-    // Observe DOM changes to apply config when sidebar/topbar are loaded
+    // Fetch config once
+    fetch('launcher.php?type=get_config_sqlite')
+        .then(response => response.json())
+        .then(data => {
+            config = data;
+            applyConfig(); // Apply immediately if elements are ready
+        })
+        .catch(error => console.error('Error loading config:', error));
+
+    // Observe DOM changes to handle dynamically loaded elements (sidebar, topbar)
     const observer = new MutationObserver(() => {
         if (config) applyConfig();
     });
-    observer.observe(document.body, { childList: true, subtree: true });
 
-    // Fetch config after all initial resources are loaded
-    window.addEventListener('load', () => {
-        fetch('launcher.php?type=get_config_sqlite')
-            .then(response => response.json())
-            .then(data => {
-                config = data;
-                window._nebuleairConfig = data;
-                applyConfig();
-                document.dispatchEvent(new CustomEvent('nebuleair-config-ready', { detail: data }));
-            })
-            .catch(error => console.error('Error loading config:', error));
-    });
+    observer.observe(document.body, { childList: true, subtree: true });
 
     function applyConfig() {
         if (!config) return;
@@ -39,12 +33,13 @@
         // 1. Topbar Logo Logic
         const logo = document.getElementById('topbar-logo');
         if (logo && isModuleAirPro) {
+            // prevent unnecessary re-assignments
             if (!logo.src.includes('logoModuleAir.png')) {
                 logo.src = 'assets/img/logoModuleAir.png';
             }
         }
 
-        // 2. Sidebar Screen Tab Logic
+        // 2. Sidebar Screen Tab Logic - Use class since ID might be duplicated (desktop/mobile)
         const navScreenElements = document.querySelectorAll('.nav-screen-item');
         if (navScreenElements.length > 0) {
             navScreenElements.forEach(navScreen => {
@@ -73,4 +68,4 @@
             badge.style.display = (config.WIFI_status === 'hotspot') ? '' : 'none';
         });
     }
-})();
+});