fix: reset reader scroll position to top when new page loads

webapp/tipitaka-web/src/components/layout/ReaderPanel.tsx

@@ -171,6 +171,16 @@ const ReaderPanel: React.FC = () => {
       .finally(() => setLoading(false));
   }, [currentVolume, currentPage]);
 
+  // Reset scroll to top when new page content is rendered
+  useEffect(() => {
+    if (!loading && content) {
+      const container = document.getElementById('reader-scroll-container');
+      if (container) {
+        container.scrollTop = 0;
+      }
+    }
+  }, [loading, content]);
+
   const { reader: readerCls } = THEME_STYLES[theme] ?? THEME_STYLES.dark;
   const shellCls = SHELL_STYLES[theme] ?? SHELL_STYLES.dark;