## What changed
Show a brief starfield in the empty composer when a new task starts with Astra or the user selects Astra through `/model` before entering ordinary prompt content.
- Respect `tui.animations`, `tui.whimsy`, and true-color support; protect the placeholder and cursor and fade out by 15 seconds.
- Preserve eligibility through recognized slash commands, but permanently dismiss it after ordinary draft content, attachments, or work. Carry draft eligibility through startup and disconnected editing.
- Exclude resumed and forked tasks, and verify model-picker changes against the originating task and effective model when applied.
- Hide the effect during overlays or focus loss without restarting its deadline or scheduling hidden animation frames.
## Testing
Add regression tests and snapshots for task eligibility, model-picker transitions, draft and paste handling, history search, overlays, submissions, rendering protection, and animation expiry.
GitOrigin-RevId: 832705543e9cae1d561125ece853a16c4eefe627
f3da3861c5