Phase-H review fixes: camp, fork streak, pet proc, BG transit, legacy streak

- Camp: campLocationCheck rejects only on live combat; no-encounter and
  post-kill rooms are campable (kills the misleading "clear it first").
- Fork: markActedToday moved after the pending-fork early-return so spamming
  !zone advance at a fork no longer keeps the daily streak alive.
- Pet whiff/deflect: single proc spent on the first multiattack swing only
  (was applied to every swing); also dedups the per-swing event spam.
- Autopilot: background region crossing now runs an HP/SU preflight and
  pauses if low, instead of burning a transit day while the player is idle.
- Legacy streak: acted-branch restamps LastActionDate=today so a purely-legacy
  actor's streak no longer resets to 1 every night.

internal/plugin/dnd_expedition_cmd.go

@@ -655,6 +655,18 @@ func (p *AdventurePlugin) runAutopilotWalk(ctx MessageContext, maxRooms int, com
 				IsMultiRegionZone(fresh.ZoneID) {
 				if cur, ok := CurrentRegion(fresh); ok {
 					if next, ok := nextRegion(fresh.ZoneID, cur.ID); ok {
+						// A region crossing burns a transit day + supplies and
+						// draws unprotected wandering damage. On the background
+						// walk, don't cross while the player is weak — preflight
+						// HP/SU and hand the crossing back to a foreground
+						// `!region travel` / `!expedition run` if either is low.
+						if compact {
+							if msg, stop := autopilotPreflight(ctx.Sender, fresh); stop {
+								finalMsg = res.final + "\n\n" + msg
+								reason = stopPreflight
+								break
+							}
+						}
 						stream = append(stream, res.final)
 						transit, terr := p.advanceToNextRegion(ctx.Sender, fresh, cur, next)
 						if terr != nil {