fix(web): memory viewer arrow navigation (#19400)

* fix(web): memory viewer jumps down on arrow keys

* fix pnpm lockfile

---------

Co-authored-by: Jason Rasmussen <jason@rasm.me>

web/src/lib/components/memory-page/memory-viewer.svelte

@@ -662,6 +662,7 @@
         viewport={galleryViewport}
         {assetInteraction}
         slidingWindowOffset={viewerHeight}
+        arrowNavigation={false}
       />
     </div>
   </section>

web/src/lib/components/shared-components/gallery-viewer/gallery-viewer.svelte

@@ -42,6 +42,7 @@
     onReload?: (() => void) | undefined;
     pageHeaderOffset?: number;
     slidingWindowOffset?: number;
+    arrowNavigation?: boolean;
   }
 
   let {
@@ -60,6 +61,7 @@
     onReload = undefined,
     slidingWindowOffset = 0,
     pageHeaderOffset = 0,
+    arrowNavigation = true,
   }: Props = $props();
 
   let { isViewing: isViewerOpen, asset: viewingAsset, setAssetId } = assetViewingStore;
@@ -306,8 +308,12 @@
         { shortcut: { key: '?', shift: true }, onShortcut: handleOpenShortcutModal },
         { shortcut: { key: '/' }, onShortcut: () => goto(AppRoute.EXPLORE) },
         { shortcut: { key: 'A', ctrl: true }, onShortcut: () => selectAllAssets() },
-        { shortcut: { key: 'ArrowRight' }, preventDefault: false, onShortcut: focusNextAsset },
-        { shortcut: { key: 'ArrowLeft' }, preventDefault: false, onShortcut: focusPreviousAsset },
+        ...(arrowNavigation
+          ? [
+              { shortcut: { key: 'ArrowRight' }, preventDefault: false, onShortcut: focusNextAsset },
+              { shortcut: { key: 'ArrowLeft' }, preventDefault: false, onShortcut: focusPreviousAsset },
+            ]
+          : []),
       ];
 
       if (assetInteraction.selectionActive) {