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/dnd_expedition_cmd.go

@@ -261,6 +261,7 @@ func (p *AdventurePlugin) expeditionCmdStart(ctx MessageContext, c *DnDCharacter
 	// Log the start with prewritten flavor.
 	startLine := flavor.Pick(flavor.ExpeditionStart)
 	_ = appendExpeditionLog(exp.ID, 1, "narrative", "expedition started", startLine)
+	markActedToday(ctx.Sender)
 
 	var b strings.Builder
 	b.WriteString(fmt.Sprintf("🗺 **Expedition begins — %s** _(T%d)_\n\n", zone.Display, int(zone.Tier)))
@@ -484,6 +485,7 @@ func (p *AdventurePlugin) expeditionCmdAbandon(ctx MessageContext) error {
 	if err := abandonExpedition(ctx.Sender); err != nil {
 		return p.SendDM(ctx.Sender, "Couldn't abandon: "+err.Error())
 	}
+	markActedToday(ctx.Sender)
 	_ = retireAllRegionRuns(exp)
 	_ = appendExpeditionLog(exp.ID, exp.CurrentDay, "narrative", "expedition abandoned", "")
 	if err := p.SendDM(ctx.Sender, fmt.Sprintf(
@@ -583,6 +585,21 @@ func (p *AdventurePlugin) runAutopilotWalk(ctx MessageContext, maxRooms int, com
 		return autopilotWalkResult{initErr: "No active region run. Try `!region` to refresh."}
 	}
 
+	// Already standing at a pending fork: autopilot can't pick for the
+	// player. Re-emit the prompt with rooms=0 so the background DM
+	// suppression keeps quiet and we don't tick the rooms counter on a
+	// no-op walk.
+	if run, rerr := getActiveZoneRun(ctx.Sender); rerr == nil && run != nil {
+		if pf, derr := decodePendingFork(run.NodeChoices); derr == nil && pf != nil {
+			zone := zoneOrFallback(run.ZoneID)
+			return autopilotWalkResult{
+				finalMsg: renderForkPrompt(zone, *pf),
+				rooms:    0,
+				reason:   stopFork,
+			}
+		}
+	}
+
 	var stream []string
 	var finalMsg string
 	rooms := 0