~anthropic/claude-sonnet-latest → A (6:4)

Commit A removes a genuinely redundant code path (ExpandNewThreadForm action, its dispatch handler, and test) and unifies public-home rendering with the same SSR pattern used elsewhere, reducing action surface and eliminating a duplicated UI flow — a real simplification with lasting design value. Commit B is a solid UX/CSS refactor of cli_panel (grouping commands, hover-copy, JS-safety assert) but is more of a polish/consistency change across call sites without removing any structural redundancy or fixing a design flaw.