fix: resolve infinite loading on Settings tab and synchronize database

- Manually triggered database table creation for AppSettingsTable.
- Refactored HTMX triggers in index.html to prevent redundant loading.
- Improved provider toggle mechanism with explicit refresh-settings event.
- Simplified router responses for better HTMX integration.

templates/index.html

@@ -143,7 +143,7 @@
 </div>
 
 <div id="tab-settings" class="tab-content" x-show="activeTab === 'settings'">
-    <div hx-get="/api/settings/ui" hx-trigger="load, set-tab[detail.tab === 'settings'] from:window" hx-swap="innerHTML">
+    <div hx-get="/api/settings/ui" hx-trigger="set-tab[detail.tab === 'settings'] from:window, refresh-settings" hx-swap="innerHTML">
         <div class="loading-placeholder">
             <div class="spinner"></div> Chargement des paramètres...
         </div>