Add Misty & Arina NPCs, fix tier gating, babysit actions, Robbie filter, streak/scheduler bugs

Misty & Arina: random encounter NPCs triggered by chat message counting
(5-10 msg threshold, 7-day cooldown, 7.5% roll). Misty asks for €100 —
accept gives 7-day arena buff (20% gourmet food heals gear + 5 enemy dmg),
decline gives 7-day debuff (20% crowd revenge damage). Arina asks for €5000 —
accept gives 7-day sniper buff (8% instant kill in arena). Effects integrate
into arena round resolution after combat roll; sniper overrides death.

Other fixes:
- Tier gating now uses base skill only — buffs improve success, not access
- Babysitter uses all harvest actions (3/day, 4 on holidays) instead of 1
- Robbie collects all non-equipped items, not just slotted gear
- Robbie timing: fire on first tick >= target hour, not exact minute match
- Streak: dead players who acted still get streak credit
- Streak: dead players skip shame DM (use LastDeathDate, not Alive flag)
- Midnight ticker: in-memory date cache prevents 1439 wasted DB checks/day
- T1 loot values ~3x across all activities to close T1/T2 gap

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

internal/plugin/adventure_scheduler.go

@@ -277,15 +277,18 @@ func (p *AdventurePlugin) midnightTicker() {
 	ticker := time.NewTicker(1 * time.Minute)
 	defer ticker.Stop()
 
+	lastRanDate := ""
+
 	for range ticker.C {
-		now := time.Now().UTC()
-		if now.Hour() != 0 || now.Minute() != 0 {
+		dateKey := time.Now().UTC().Format("2006-01-02")
+		if dateKey == lastRanDate {
 			continue
 		}
 
-		dateKey := now.Format("2006-01-02")
+		// New UTC day — check DB in case we already ran (e.g. bot restart).
 		jobName := "adventure_midnight"
 		if db.JobCompleted(jobName, dateKey) {
+			lastRanDate = dateKey
 			continue
 		}
 
@@ -295,6 +298,7 @@ func (p *AdventurePlugin) midnightTicker() {
 			continue
 		}
 		db.MarkJobCompleted(jobName, dateKey)
+		lastRanDate = dateKey
 	}
 }
 
@@ -309,14 +313,11 @@ func (p *AdventurePlugin) midnightReset() error {
 
 	dmsSent := 0
 	for _, char := range chars {
-		// Dead players freeze their streak — death is involuntary, don't punish it.
-		if !char.Alive {
-			continue
-		}
-
 		if !char.HasActedToday() {
-			// If the player died today (or yesterday — covering late-night deaths
-			// that span midnight), grant a grace period: no shame, no streak reset.
+			// If the player died today or yesterday, they couldn't act — no shame,
+			// no streak reset. This covers both currently-dead players and players
+			// who were just revived at midnight (Alive already flipped to true by
+			// the reminder loop before midnightReset runs).
 			if char.LastDeathDate == today ||
 				char.LastDeathDate == time.Now().UTC().Add(-24*time.Hour).Format("2006-01-02") {
 				continue
@@ -374,6 +375,9 @@ func (p *AdventurePlugin) midnightReset() error {
 		slog.Error("adventure: failed to prune expired buffs", "err", err)
 	}
 
+	// Reset NPC message counts and regenerate roll targets
+	npcMidnightReset()
+
 	// Clear flavor history to prevent unbounded memory growth.
 	// Entries are only used for dedup within a day, so clearing at midnight is fine.
 	advClearFlavorHistory()