The feed doesn't say "Empty" before its persona is known

On opening, the feed showed "Empty" until the session had been read and a persona chosen, then loaded: a flash of a
wrong answer on every start (and the end-to-end sign-in took it for a loaded feed). CascadingState says once the session
has been read (IsSessionLoaded), and until then a feed with no persona yet is loading; a login without any persona still
gets its empty feed. The persona-switch test waits for the sibling's home read with another token than the first
persona's, instead of any home read after the switch was asked for.

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

LayerComponents/CascadingState.razor

@@ -27,6 +27,8 @@
 	public PublicCacheData PublicCacheData { get; private set; } = new();
 	/// <summary>Whether a root is signed in (its JWT is still valid).</summary>
 	public bool IsSignedIn { get; private set; }
+	/// <summary>The session has been read once: from then on a null PersonaId means the login has no persona, not "not yet".</summary>
+	public bool IsSessionLoaded { get; private set; }
 	/// <summary>The root's login name, shown to its owner only.</summary>
 	public string RootUserName { get; private set; }
 	/// <summary>The root's personas.</summary>
@@ -93,6 +95,7 @@
 		if (!IsSignedIn)
 		{
 			ClearSession();
+			IsSessionLoaded = true;
 			StateHasChanged();
 			return;
 		}
@@ -105,10 +108,12 @@
 		{
 			PersonaId = null;
 			Persona = null;
+			IsSessionLoaded = true;
 			StateHasChanged();
 			return;
 		}
 
+		IsSessionLoaded = true;
 		await SwitchPersona(personaId, cancellationToken);
 	}
 

Pages/Index.razor

@@ -155,6 +155,7 @@
 	(double Latitude, double Longitude)? position;
 	string positionError;
 	string loadedPersonaId;
+	bool waitingForPersona;
 	FeedQuery lastQuery;
 	DateTime? lastPollAt;
 	TimeSpan? lastLoadTook;
@@ -183,9 +184,11 @@
 			return;
 		}
 
+		// (while the session is still being read the persona isn't known yet: the feed is loading, not empty)
 		if (CascadingState.PersonaId is null)
 		{
-			IsLoading = false;
+			waitingForPersona = !CascadingState.IsSessionLoaded;
+			IsLoading = waitingForPersona;
 			return;
 		}
 
@@ -219,11 +222,19 @@
 		return true;
 	}
 
-	// The persona changed (NavMenu's switcher): everything on the page belongs to the old one.
+	// The persona is known (the session was read after the page opened) or changed (NavMenu's switcher): everything on the
+	// page belongs to it.
 	protected override async Task OnParametersSetAsync()
 	{
-		if (CascadingState.PersonaId is null || CascadingState.PersonaId == loadedPersonaId || IsLoading && loadedPersonaId is null)
+		if (waitingForPersona && CascadingState.IsSessionLoaded && CascadingState.PersonaId is null)
+		{
+			waitingForPersona = false;
+			IsLoading = false;
 			return;
+		}
+		if (CascadingState.PersonaId is null || CascadingState.PersonaId == loadedPersonaId || IsLoading && loadedPersonaId is null && !waitingForPersona)
+			return;
+		waitingForPersona = false;
 		await Reload();
 	}
 

tests/e2e/Login/LoginTests.cs

@@ -34,11 +34,12 @@ namespace decePubClient.E2E.Login
 			await session.Page.Locator("nav [title='Switch persona']").First.ClickAsync();
 			await session.Page.Locator("nav").GetByRole(AriaRole.Button).Filter(new() { HasText = sibling.Name ?? sibling.UserName }).First.ClickAsync();
 
+			// the sibling's home, read with another token than the first persona's (whose own home may still be loading when the
+			// switch is asked for)
+			string FirstToken() => session.ApiCalls.FirstOrDefault(c => new Uri(c.Url).AbsolutePath.StartsWith("/api/") && c.Authorization is not null).Authorization;
 			Assert.True(await Pasture.Eventually(() => Task.FromResult(session.ApiCalls.Skip(before)
-				.Any(c => new Uri(c.Url).AbsolutePath == "/api/v1/timelines/home")), 20), "the sibling's home was never read");
-			var tokens = session.ApiCalls.Where(c => new Uri(c.Url).AbsolutePath.StartsWith("/api/") && c.Authorization is not null)
-				.Select(c => c.Authorization).Distinct().ToList();
-			Assert.True(tokens.Count >= 2, "both personas' requests went out with one token");
+				.Any(c => new Uri(c.Url).AbsolutePath == "/api/v1/timelines/home" && c.Authorization is not null && c.Authorization != FirstToken())), 20),
+				"the sibling's home was never read with its own token");
 			await session.AssertGuards();
 		}