cards.js has been raising `ui:continue {from,to}` since Lane E round 1, with the comment
"INTEGRATOR: nothing consumes ui:continue yet." Boot consumes it now, so crossing a gate and
pressing CONTINUE loads C's `next` level instead of ending the run. Three levels in a folder
become a campaign.
Deliberately a full page load: the alternative is rebuilding world + player + combat + UI in
place and re-wiring every bus listener to save ~1s on a transition that happens 4 times a run,
and the reload guarantees no leaked pools or stale event pumps. Flags ride along (?dbg=1,
?seed= survive the hop). A `to` that isn't in CAMPAIGN — or is null — ends the campaign on the
medal card rather than dumping the player into the stub tube.
Verified: L2 -> CONTINUE -> ?lvl=L3_stomach with flags intact; unknown "L4_small_intestine"
and null both correctly no-op.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
fb08d7895b