fix: deep link to last asset

web/src/lib/components/timeline/Timeline.svelte

@@ -176,12 +176,24 @@
   };
 
   const scrollAndLoadAsset = async (assetId: string) => {
-    const monthGroup = await timelineManager.findMonthGroupForAsset(assetId);
-    if (!monthGroup) {
-      return false;
+    try {
+      // This flag prevents layout deferral to fix scroll positioning issues.
+      // When layouts are deferred and we scroll to an asset at the end of the timeline,
+      // we can calculate the asset's position, but the scrollableElement's scrollHeight
+      // hasn't been updated yet to reflect the new layout. This creates a mismatch that
+      // breaks scroll positioning. By disabling layout deferral in this case, we maintain
+      // the performance benefits of deferred layouts while still supporting deep linking
+      // to assets at the end of the timeline.
+      timelineManager.isScrollingOnLoad = true;
+      const monthGroup = await timelineManager.findMonthGroupForAsset(assetId);
+      if (!monthGroup) {
+        return false;
+      }
+      scrollToAssetPosition(assetId, monthGroup);
+      return true;
+    } finally {
+      timelineManager.isScrollingOnLoad = false;
     }
-    scrollToAssetPosition(assetId, monthGroup);
-    return true;
   };
 
   const scrollToAsset = (asset: TimelineAsset) => {

web/src/lib/managers/timeline-manager/day-group.svelte.ts

@@ -140,7 +140,7 @@ export class DayGroup {
   }
 
   layout(options: CommonLayoutOptions, noDefer: boolean) {
-    if (!noDefer && !this.monthGroup.intersecting) {
+    if (!noDefer && !this.monthGroup.intersecting && !this.monthGroup.timelineManager.isScrollingOnLoad) {
       this.#deferredLayout = true;
       return;
     }

web/src/lib/managers/timeline-manager/timeline-manager.svelte.ts

@@ -61,6 +61,7 @@ export class TimelineManager extends VirtualScrollManager {
   });
 
   isInitialized = $state(false);
+  isScrollingOnLoad = false;
   months: MonthGroup[] = $state([]);
   albumAssets: Set<string> = new SvelteSet();
   scrubberMonths: ScrubberMonth[] = $state([]);