Merge branch 'claude/distracted-ritchie-53fc70'

Bounds the renderer wait, so a WebView2 that never initialises reports itself
instead of hanging Connect with the busy flag stuck.

Conflict resolution, all of it in the App test suite, which main had changed
under the branch when sleepy-chebyshev landed:

- The workspace fixture keeps main's fake SSH factory and its FakeRenderer-aware
  page, and takes the branch's RendererTimeout on top. One second rather than
  the branch's 250 ms, because the timeout now also bounds FakeRenderer's own
  wait for the attach it just made.
- FakeRenderer arrived on main after the branch was cut and still called the
  no-argument WaitForRendererAsync. Both sides merged cleanly and left the build
  broken; it now passes its own token.
- ConnectingWithNoRenderer's remark claimed the suite never starts the workspace
  and never attaches a renderer. Both are false here, so it now says what is
  true of the test: it is the one connect test that attaches no renderer.

tests/DodoSSH.Client.App.Tests/FakeRenderer.cs

@@ -66,7 +66,7 @@ internal sealed partial class FakeRenderer : IAsyncDisposable
 
         var renderer = new FakeRenderer(attached);
 
-        await workspace.WaitForRendererAsync().ConfigureAwait(false);
+        await workspace.WaitForRendererAsync(cancellationToken).ConfigureAwait(false);
 
         return renderer;
     }