Adv 2.0 D&D Phase 12 E3b: Haunted Manor nightly reset

§7.2 cycle: every 3rd day's morning briefing in Blackspire fires the
"manor reset" temporal log — non-boss rooms respawn one enemy each.
Boss-defeated suppresses. Wrong-zone is a no-op.

Exposes ManorReset(e, day) bool for the combat-link phase to read at
!advance time when applying the actual respawn (per the deferral
pattern from E2b's wandering-encounter combat).

Reuses flavor.HauntedManorResetMorning per feedback_reuse_existing_flavor.

Deferred: Night-2 quiet warning narration on the recap path — needs
a new hook in deliverRecap; not load-bearing for the reset itself.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/plugin/dnd_expedition_temporal.go

@@ -49,6 +49,10 @@ func applyZoneTemporalPreBurn(e *Expedition, nextDay int) (extraHarsh bool) {
 	return extraHarsh
 }
 
+// ManorResetCycleDays is the §7.2 reset cadence — non-boss rooms
+// respawn one enemy each on the morning of every Nth day.
+const ManorResetCycleDays = 3
+
 // applyZoneTemporalPostRollover runs AFTER advance + threat drift.
 // It appends per-zone narration log entries for the day that just
 // became current. Returns lines to append to the briefing body.
@@ -56,6 +60,8 @@ func applyZoneTemporalPostRollover(e *Expedition) []string {
 	switch e.ZoneID {
 	case ZoneSunkenTemple:
 		return sunkenTempleTemporalPostRollover(e)
+	case ZoneManorBlackspire:
+		return manorTemporalPostRollover(e)
 	}
 	return nil
 }
@@ -95,3 +101,39 @@ func sunkenTempleTemporalPostRollover(e *Expedition) []string {
 	}
 	return nil
 }
+
+// ─────────────────────────────────────────────────────────────────────
+// §7.2 — Haunted Manor of Blackspire, Nightly Reset
+// ─────────────────────────────────────────────────────────────────────
+
+// ManorReset reports whether the briefing rolling onto `day` is the
+// reset morning (every 3rd day: 3, 6, 9, ...). Boss-defeated suppresses.
+func ManorReset(e *Expedition, day int) bool {
+	if e.BossDefeated || e.ZoneID != ZoneManorBlackspire {
+		return false
+	}
+	return day >= ManorResetCycleDays && day%ManorResetCycleDays == 0
+}
+
+// manorTemporalPostRollover writes a "house reset" entry on Day 3, 6,
+// 9, ... and a quiet pre-reset warning on the day after that (Day 4,
+// 7, ...) — which corresponds to the briefing fired on the morning
+// after the warning night, so we anchor narration at the briefing.
+//
+// Spec §7.2: "TwinBee notes on Night 2: 'The house has been quiet.
+// That will not last.' On Night 3 morning: 'Overnight, something moved
+// back in.'" — we fire the reset narration on the reset morning. The
+// quiet-warning Night 2 line lives on the recap path (E2b's deliverRecap
+// will add it as a separate hook in a future commit if desired); for
+// E3b we keep the rule simple: only the reset morning fires here.
+func manorTemporalPostRollover(e *Expedition) []string {
+	day := e.CurrentDay
+	if !ManorReset(e, day) {
+		return nil
+	}
+	line := flavor.Pick(flavor.HauntedManorResetMorning)
+	_ = appendExpeditionLog(e.ID, day, "temporal",
+		fmt.Sprintf("manor reset — non-boss rooms respawned one enemy each (cycle day %d)", day),
+		line)
+	return []string{line}
+}