feat(analytics): add behavior and payment funnel tracking

src/app/_components/core/app-bottom-nav.tsx

@@ -24,6 +24,8 @@ export function AppBottomNav({
     <nav className={getRootClass(variant)} aria-label="Primary navigation">
       <button
         type="button"
+        data-analytics-key="navigation.chat"
+        data-analytics-label="Chat navigation"
         className={getButtonClass(activeItem === "chat")}
         aria-current={activeItem === "chat" ? "page" : undefined}
         onClick={onChatClick}
@@ -33,6 +35,8 @@ export function AppBottomNav({
       </button>
       <button
         type="button"
+        data-analytics-key="navigation.private_room"
+        data-analytics-label="Private room navigation"
         className={getButtonClass(activeItem === "privateRoom")}
         aria-current={activeItem === "privateRoom" ? "page" : undefined}
         onClick={onPrivateRoomClick}