A new footer notice tells you when background task updates are waiting because a side panel (like the model picker or IDE panel) is open
What
The chat interface now accepts a panelHoldsQueue signal. When it's true, a small notice appears reading "Background task update" (or "N background task updates") followed by "waiting while this panel is open".
This notice shows up when there's an active full-screen panel or dialog (such as the model picker or IDE panel) open over the chat, and background task updates are queued but not yet shown because the background task runner itself isn't currently in view. It applies both to the main chat/panel layout and to remote or live sessions with items queued in a side panel.
Why
Without this, updates from background tasks could be silently queued and easy to miss while a panel or dialog is covering the chat. The notice makes clear that something is waiting as soon as the panel is closed.