Auto-walk: gate on fork/rest, slow cadence, credit DnD streak

Four fixes for the auto-walk loop that was re-clearing the same room
every 15 min while a fork was pending, ignoring the rest lockout, and
not counting expedition activity toward the daily streak:

- advanceOnceWithOpts / runAutopilotWalk now short-circuit to stopFork
  when NodeChoices has a pending fork. Stops phantom kills + duplicate
  loot drops + fork re-prompts on the same cleared room.
- fireExpeditionAutoRuns honors restingLockoutRemaining so the
  background ticker no longer walks through a long rest.
- autoRunCooldown 15m -> 2h, autoRunTickInterval 5m -> 15m. Auto-walk
  DMs are now a once-in-a-while ping, not a steady drip.
- markActedToday + HasActedToday recognise LastActionDate. Wired into
  !rest short/long, !expedition start/abandon, !extract, foreground
  !zone advance, and !zone go so DnD-side activity credits the streak
  even when the expedition ends before midnight.

(cherry picked from commit 9e27fd8257a4c92150ad584b393bf5a72270b82c)

internal/plugin/adventure_character.go

@@ -311,7 +311,30 @@ func (c *AdventureCharacter) CanDoHarvest(isHoliday bool) bool {
 }
 
 func (c *AdventureCharacter) HasActedToday() bool {
-	return c.CombatActionsUsed > 0 || c.HarvestActionsUsed > 0
+	if c.CombatActionsUsed > 0 || c.HarvestActionsUsed > 0 {
+		return true
+	}
+	// DnD-side flows (expedition / zone / rest / autopilot) don't touch
+	// the legacy action counters; they credit the day via LastActionDate
+	// instead. Honor that so a player who ran an expedition all day and
+	// extracted before midnight still counts as having acted.
+	return c.LastActionDate == time.Now().UTC().Format("2006-01-02")
+}
+
+// markActedToday stamps the player's LastActionDate to today so the
+// midnight reset credits the day. Safe to call on every DnD-side action;
+// no-ops if the date is already today.
+func markActedToday(userID id.UserID) {
+	today := time.Now().UTC().Format("2006-01-02")
+	c, err := loadAdvCharacter(userID)
+	if err != nil || c == nil {
+		return
+	}
+	if c.LastActionDate == today {
+		return
+	}
+	c.LastActionDate = today
+	_ = saveAdvCharacter(c)
 }
 
 func (c *AdventureCharacter) AllActionsUsed(isHoliday bool) bool {