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/adventure_scheduler.go

@@ -486,6 +486,11 @@ func (p *AdventurePlugin) midnightReset() error {
 			if char.CurrentStreak > char.BestStreak {
 				char.BestStreak = char.CurrentStreak
 			}
+			// Restamp to today (mirrors the busy branch above). A purely-legacy
+			// actor whose action path bumps CombatActionsUsed/HarvestActionsUsed
+			// but never stamps LastActionDate lands here with a stale date; without
+			// this its streak would reset to 1 every night even with continuous play.
+			char.LastActionDate = today
 			_ = saveAdvCharacter(&char)
 		}
 	}