refactor(private-zoom): rename full feature surface

src/app/splash/splash-screen.tsx

@@ -37,8 +37,8 @@ export function SplashScreen() {
     navigator.openChat({ replace: true });
   };
 
-  const handleOpenPrivateRoom = () => {
-    navigator.push(characterRoutes.privateRoom, { scroll: false });
+  const handleOpenPrivateZoom = () => {
+    navigator.push(characterRoutes.privateZoom, { scroll: false });
   };
 
   const handleOpenSplash = () => {
@@ -77,9 +77,9 @@ export function SplashScreen() {
         </div>
         <AppBottomNav
           activeItem="chat"
-          privateRoomLabel={character.copy.privateRoomTitle}
+          privateZoomLabel={character.copy.privateZoomTitle}
           onChatClick={handleOpenSplash}
-          onPrivateRoomClick={handleOpenPrivateRoom}
+          onPrivateZoomClick={handleOpenPrivateZoom}
         />
       </div>
     </MobileShell>