The chip row lived in CurrentComposition, was fed the fold's per-tool
toolList summary, and the chips focused the Context browser on a tool
via a one-shot toolFocus callback. The browser already exposes the
tool schemas through its headers section, so the chip row was a
duplicate entry point that no longer pulled its weight.
Removes the lc-tools DOM block, the toolFocus/onToolFocusHandled
prop wiring across ContextView/ContextModal/Browser, the
'tools.top'/'tools.more' translations, the .lc-tools* CSS, and the
now-unused toolList summary across the wire + state schemas
(stateVersion 9 -> 10). estimateToolSchema stays because headers.ts
still prices individual tools for the browser's tool-schema cards.