fix(cx-9ah60): sequence agent chat bottom stack without overlap
The agent chat bottom stack needs a real geometry contract: trust, permission, queued prompts and the composer must occupy one predictable column. This PR starts with a gallery behavior regression for the combined state; the follow-up fix gates permission on trust and reserves queue space for every ask surface.
Changelog
Fixed agent chat trust, permission and queued prompt stack geometry.
Proof
Gallery preview (base/head branch preview):
Verification
The red gallery play asserts that a permission card is hidden until trust is answered and that stack layers do not intersect. The fix commit will turn the same play green.
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Summary by cubic
Fixes the agent chat bottom stack so trust prompts, tool permission cards, queued prompts, and the composer stay in one non-overlapping column instead of competing for space.
- Gates permission and secret cards behind folder trust so only one ask appears at a time; a trusted receipt can sit above the next ask.
- Reserves queue space before painting asks so the queue never overlaps the transcript or composer, and tracks reader follow intent so layout-driven scroll events don't unpin the transcript when the stack height changes.
- Consolidates legacy and grouped permission cards onto one shared card surface with canonical localized labels, stable shortcut hints keyed to those labels, and unified composer material.
- Folds granted permission state into a compact composer control with undo and revoke, and moves trust undo into the same status menu.
- Adds gallery regression tests that assert canonical action labels, no peer stack layer intersections, and trusted-state undo/revoke behavior across wide, narrow, and compact viewports.