Adv 2.0 D&D Phase 11 D2b: Tier 1 zone flavor files

New additive flavor files (zone_goblin_warrens_flavor.go,
zone_crypt_valdris_flavor.go) with elite-room intros, boss ability
callouts (Grol: Surprise Attack / Heart of Hruggek / Terrifying Roar;
Valdris: Corrupting Touch / Legendary Resistance / Call of the Grave /
Phase Two), and zone-specific lore deep-dives. Existing
twinbee_gm_flavor.go is untouched per the protected-files contract.

Wires three narration helpers in dnd_zone_narration.go:
  composeBossEntry — boss-entry render plus a one-line ability callout
  eliteRoomEntryLine — elite-room atmospheric prefix
  zoneLorePool — zone-specific !lore pool with generic fallback

Boss-entry callsite in dnd_zone_cmd.go now uses composeBossEntry; the
elite branch of resolveCombatRoom prefixes with the zone's elite line.

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

internal/plugin/dnd_zone_narration_test.go

@@ -5,6 +5,8 @@ import (
 	"testing"
 	"time"
 
+	"gogobee/internal/flavor"
+
 	"maunium.net/go/mautrix/id"
 )
 
@@ -162,6 +164,78 @@ func TestApplyMoodEvent_UnknownEventErrors(t *testing.T) {
 	}
 }
 
+// ── Phase 11 D2b — Tier 1 zone flavor file routing ──────────────────────────
+
+func TestComposeBossEntry_AppendsAbilityCalloutForTier1(t *testing.T) {
+	got := composeBossEntry(ZoneGoblinWarrens, "run-d2b", 7)
+	if !strings.Contains(got, "Grol") {
+		t.Errorf("Warrens boss-entry should mention Grol: %q", got)
+	}
+	// Two TwinBee prefixes = entry + callout suffix.
+	if n := strings.Count(got, "🎭 **TwinBee:**"); n != 2 {
+		t.Errorf("Warrens boss-entry expected 2 TwinBee blocks (entry+callout), got %d:\n%s", n, got)
+	}
+
+	got = composeBossEntry(ZoneCryptValdris, "run-d2b", 7)
+	if !strings.Contains(got, "Valdris") {
+		t.Errorf("Crypt boss-entry should mention Valdris: %q", got)
+	}
+	if n := strings.Count(got, "🎭 **TwinBee:**"); n != 2 {
+		t.Errorf("Crypt boss-entry expected 2 TwinBee blocks (entry+callout), got %d:\n%s", n, got)
+	}
+}
+
+func TestComposeBossEntry_NoCalloutForUnflavoredZone(t *testing.T) {
+	// Forest of Shadows has a named boss-entry pool (Hollow King) but no
+	// signature-callout pool yet — composer should return the bare entry.
+	got := composeBossEntry(ZoneForestShadows, "run-d2b", 1)
+	if got == "" {
+		t.Fatal("forest boss-entry should still render")
+	}
+	if n := strings.Count(got, "🎭 **TwinBee:**"); n != 1 {
+		t.Errorf("Forest boss-entry expected 1 TwinBee block (no callout pool), got %d:\n%s", n, got)
+	}
+}
+
+func TestComposeBossEntry_DeterministicAcrossCalls(t *testing.T) {
+	a := composeBossEntry(ZoneGoblinWarrens, "stable-run", 4)
+	b := composeBossEntry(ZoneGoblinWarrens, "stable-run", 4)
+	if a != b {
+		t.Errorf("compose not deterministic:\n  a=%q\n  b=%q", a, b)
+	}
+}
+
+func TestEliteRoomEntryLine_RoutesPerZone(t *testing.T) {
+	w := eliteRoomEntryLine(ZoneGoblinWarrens, "run-elite", 3)
+	if w == "" || !strings.HasPrefix(w, "🎭 **TwinBee:**") {
+		t.Errorf("Warrens elite line missing/no prefix: %q", w)
+	}
+	c := eliteRoomEntryLine(ZoneCryptValdris, "run-elite", 3)
+	if c == "" || !strings.HasPrefix(c, "🎭 **TwinBee:**") {
+		t.Errorf("Crypt elite line missing/no prefix: %q", c)
+	}
+	if w == c {
+		t.Errorf("Warrens and Crypt elite lines collided on same salt — pools shouldn't overlap")
+	}
+	// Unflavored zone returns empty so the caller skips the prefix.
+	if got := eliteRoomEntryLine(ZoneDragonsLair, "run-elite", 3); got != "" {
+		t.Errorf("unflavored zone should return empty, got %q", got)
+	}
+}
+
+func TestZoneLorePool_PrependsZoneSpecific(t *testing.T) {
+	w := zoneLorePool(ZoneGoblinWarrens)
+	if len(w) <= len(flavor.LoreLines) {
+		t.Errorf("Warrens lore pool should be larger than generic; got %d vs generic %d",
+			len(w), len(flavor.LoreLines))
+	}
+	// Tier 2+ zone with no dedicated lore must fall back to the generic pool.
+	if got := zoneLorePool(ZoneForestShadows); len(got) != len(flavor.LoreLines) {
+		t.Errorf("Forest lore pool should fall back to generic; got %d, want %d",
+			len(got), len(flavor.LoreLines))
+	}
+}
+
 func TestZoneCmd_AdvanceFinalRoomBumpsMood(t *testing.T) {
 	setupAuditTestDB(t)
 	uid := id.UserID("@zone-mood-complete:example")