update: use a different dialog for templates only

webapp/app.ironcalc.com/frontend/src/App.tsx

@@ -24,7 +24,6 @@ import { IronCalc, IronCalcIcon, Model, init } from "@ironcalc/workbook";
 function App() {
   const [model, setModel] = useState<Model | null>(null);
   const [showWelcomeDialog, setShowWelcomeDialog] = useState(false);
-  const [isTemplateOnlyDialog, setIsTemplateOnlyDialog] = useState(false);
 
   useEffect(() => {
     async function start() {
@@ -59,7 +58,6 @@ function App() {
         const newModel = loadSelectedModelFromStorage();
         if (!newModel) {
           setShowWelcomeDialog(true);
-          setIsTemplateOnlyDialog(false); // Full dialog for first-time usage
           const createdModel = new Model("template", "en", "UTC");
           setModel(createdModel);
         } else {
@@ -109,7 +107,6 @@ function App() {
         }}
         newModelFromTemplate={() => {
           setShowWelcomeDialog(true);
-          setIsTemplateOnlyDialog(true); // Template-only dialog for "New from template"
         }}
         setModel={(uuid: string) => {
           const newModel = selectModelFromStorage(uuid);
@@ -133,7 +130,6 @@ function App() {
               setModel(createdModel);
             }
             setShowWelcomeDialog(false);
-            setIsTemplateOnlyDialog(false);
           }}
           onSelectTemplate={async (templateId) => {
             switch (templateId) {
@@ -151,10 +147,7 @@ function App() {
               }
             }
             setShowWelcomeDialog(false);
-            setIsTemplateOnlyDialog(false);
           }}
-          showHeader={!isTemplateOnlyDialog}
-          showNewSection={!isTemplateOnlyDialog}
         />
       )}
     </Wrapper>