Settings: change the login's password, or delete the login

A Login section in Settings changes the root's password (the current one
given) and deletes the whole login, every persona with it, after its
password and an explicit "I understand"; the client then signs out. Both
use PrivaPub's existing /clientapi/user routes.

The e2e signs up a login of its own, changes its password and deletes it,
checking each against PrivaPub's login. Signing in now waits for either
the feed or an enabled persona chooser, so a login with one persona (which
goes on by itself) and a new persona's empty feed both sign in.

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

Pages/Settings.razor

@@ -60,6 +60,26 @@
 			</ChildContent>
 		</DCollapse>
 
+		<DCollapse Icon="DCollapseIcon.Arrow">
+			<Header>
+				<p class="inline-flex items-center gap-2" data-settings-account>
+					<i class="ion-md-key text-xl"></i> <span>@Localizer["Login"]</span>
+				</p>
+			</Header>
+			<ChildContent>
+				<div class="block w-full p-3 md:p-4">
+					@if (CascadingState.IsSignedIn)
+					{
+						<AccountEditor />
+					}
+					else
+					{
+						<a class="link" href="login">@Localizer["Sign in to PrivaPub"]</a>
+					}
+				</div>
+			</ChildContent>
+		</DCollapse>
+
 		<DCollapse Icon="DCollapseIcon.Arrow">
 			<Header>
 				<p class="inline-flex items-center gap-2">