Discoverability follow-up to baking agent-browser into the base: agents won't
reach for a browser they don't know they have (the exact gap that made this
capability easy to miss). Add a short pointer section to the pi-devbox managed
block — capability, the preset AGENT_BROWSER_EXECUTABLE_PATH, and
`agent-browser skills get core --full` for the command set. Pointer only; depth
stays in the skill. rootfs change → folds into the same base-<hash> rebuild.
CHANGELOG note updated.
joakimp
6625d66f3a