Fix future timestamp bug and improve loading spinner UX

js/app.js

@@ -2698,17 +2698,15 @@ class Application {
       typeof reason === "string" && reason.trim() ? reason.trim() : undefined;
 
     if (typeof moderationService?.awaitUserBlockRefresh === "function") {
-      try {
-        await moderationService.awaitUserBlockRefresh();
-      } catch (error) {
+      moderationService.awaitUserBlockRefresh().catch((error) => {
         const contextMessage = normalizedReason
-          ? ` before ${normalizedReason}`
-          : "";
+          ? ` in background during ${normalizedReason}`
+          : " in background";
         devLogger.warn(
           `Failed to sync moderation summaries${contextMessage}:`,
           error,
         );
-      }
+      });
     }
 
     try {
@@ -5359,10 +5357,17 @@ class Application {
     devLogger.log("Starting loadVideos... (forceFetch =", forceFetch, ")");
 
     const container = this.mountVideoListView();
-    if (this.videoListView && container) {
-      this.videoListView.showLoading("Fetching recent videos…");
-    } else if (container) {
-      container.innerHTML = getSidebarLoadingMarkup("Fetching recent videos…");
+    const hasCachedVideos =
+      this.nostrService &&
+      Array.isArray(this.nostrService.getFilteredActiveVideos()) &&
+      this.nostrService.getFilteredActiveVideos().length > 0;
+
+    if (!hasCachedVideos) {
+      if (this.videoListView && container) {
+        this.videoListView.showLoading("Fetching recent videos…");
+      } else if (container) {
+        container.innerHTML = getSidebarLoadingMarkup("Fetching recent videos…");
+      }
     }
 
     let initialRefreshPromise = null;

js/nostr/client.js

@@ -5629,12 +5629,13 @@ export class NostrClient {
 
   getLatestCachedCreatedAt() {
     let latest = 0;
+    const now = Math.floor(Date.now() / 1000);
 
     for (const video of this.allEvents.values()) {
       const createdAt = Number.isFinite(video?.created_at)
         ? Math.floor(video.created_at)
         : 0;
-      if (createdAt > latest) {
+      if (createdAt > latest && createdAt <= now) {
         latest = createdAt;
       }
     }