UI: promote V2 as default and keep ?ui=v1 fallback

app.js

@@ -90,7 +90,9 @@ let scannerRunning = false;
 let scannerLoopId = null;
 let scannerLastCodeValue = "";
 let scannerLastCodeAt = 0;
-const uiV2Enabled = new URLSearchParams(window.location.search).get("ui") === "v2";
+// V2 is now the default UI. Use ?ui=v1 to force legacy mode if needed.
+const uiParam = new URLSearchParams(window.location.search).get("ui");
+const uiV2Enabled = uiParam !== "v1";
 let v2SearchTerm = "";
 let v2ConsoleValue = "";
 let v2GenreValue = "";

index.html

@@ -62,7 +62,7 @@
 
     <main class="app-shell">
       <div id="v2StickyBar" class="v2-sticky hidden">
-        <div class="v2-sticky-title">UI V2 Preview</div>
+        <div class="v2-sticky-title">Vue catalogue</div>
         <div id="v2StickyCount" class="v2-sticky-count">0 jeu</div>
         <div class="v2-sticky-actions">
           <button id="v2ToggleFormBtn" type="button" class="btn-secondary">Ajouter</button>