fix(chat): restore scroll after image viewer return

src/app/chat/components/image-bubble.tsx

@@ -19,6 +19,7 @@ import {
 } from "@/lib/chat/chat_media_url";
 import { useCachedChatMediaUrl } from "@/lib/chat/use_cached_chat_media_url";
 
+import { requestChatScrollSnapshotSave } from "../chat-scroll-session";
 import styles from "./image-bubble.module.css";
 
 export interface ImageBubbleProps {
@@ -46,7 +47,8 @@ export function ImageBubble({
 
   const openImage = () => {
     if (!messageId) return;
-    router.push(ROUTE_BUILDERS.chatImage(messageId));
+    requestChatScrollSnapshotSave();
+    router.push(ROUTE_BUILDERS.chatImage(messageId), { scroll: false });
   };
 
   return (