style(ai): selecteurs Fournisseur/Modele alignes a droite et reordonnes (#82)

frontend/js/ai.js

@@ -217,7 +217,7 @@ async function _buildPickerUI() {
   infoBtn.title = t('ai.model_info');
   const capsPop = document.createElement('div');
   capsPop.className = 'ai-picker-caps-pop hidden';
-  capsPop.style.cssText = 'position:absolute;top:calc(100% + 4px);right:0;z-index:60;'
+  capsPop.style.cssText = 'position:absolute;top:calc(100% + 4px);left:0;z-index:60;'
     + 'min-width:220px;max-width:300px;background:var(--bg-primary);border:1px solid var(--border);'
     + 'border-radius:8px;box-shadow:0 8px 24px rgba(0,0,0,0.35);padding:8px 10px;';
   capsHost.appendChild(infoBtn);
@@ -442,10 +442,11 @@ async function _buildPickerUI() {
     _renderList();
   }
 
+  // Visual order: capability info, provider menu, model menu.
+  wrap.appendChild(capsHost);
   wrap.appendChild(providerSelect);
   wrap.appendChild(modelSelect);
   wrap.appendChild(combo);
-  wrap.appendChild(capsHost);
   return wrap;
 }