Feed tabs say what they are

Below xl every feed tab but the selected one was a lone icon with no name, for a screen reader or a finger. DTab takes
an AccessibleName, which DTabs renders as the tab's label and tooltip, and FeedTabs names each tab; on a phone every
tab shows its name too. The strip is marked as one that scrolls sideways (data-scroll-x), says it holds the feeds, and
on a phone fades at the edge where more tabs wait (edge-fade-x, a scroll-driven animation where the browser has one);
the selected tab is brought into view when it changes (window.revealActive). Explore's tabs get the same.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw

Services/AppStatusService.cs

@@ -1,3 +1,4 @@
+using Microsoft.AspNetCore.Components;
 using decePubClient.Models;
 
 using Microsoft.JSInterop;
@@ -41,6 +42,9 @@ public class AppStatusService(IJSRuntime jsRuntime)
 
 		public bool IsMobileMedia() => JsSyncRuntime.Invoke<bool>("isMobileMedia");
 
+		// a sideways-scrolling strip of tabs shows its selected tab
+		public void RevealActive(ElementReference strip) => JsSyncRuntime.InvokeVoid("revealActive", strip);
+
 		public bool CanShare() => JsSyncRuntime.Invoke<bool>("canShareStuff");
 
 		public async ValueTask ShareTextUrl(string title, string text, Uri uri, CancellationToken cancellationToken = default) =>