Adv 2.0 D&D Phase 12 E3a: Sunken Temple tidal event

Adds the §7.1 tidal event hook: warnings on Days 4 and 5, peak event
on Day 6 with forced 2× supply burn (overrides tier-2 HarshMod 1.5×),
silenced if the boss has been defeated.

Wires zone-temporal events into deliverBriefing as two new hook points
— pre-burn (mutates burn multiplier) and post-rollover (appends
flavor-bearing log entries). Future E3b–E3f layer onto the same hooks.

Reuses the prewritten flavor.SunkenTempleTidalWarning / TidalEvent
pools per feedback_reuse_existing_flavor.

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

internal/plugin/dnd_expedition_temporal_test.go

@@ -0,0 +1,162 @@
+package plugin
+
+import (
+	"strings"
+	"testing"
+	"time"
+
+	"gogobee/internal/db"
+	"maunium.net/go/mautrix/id"
+)
+
+// Phase 12 E3a — Sunken Temple tidal event.
+
+// setExpDay rewrites the current_day column for tests.
+func setExpDay(t *testing.T, expID string, day int) {
+	t.Helper()
+	if _, err := db.Get().Exec(
+		`UPDATE dnd_expedition SET current_day = ? WHERE expedition_id = ?`,
+		day, expID); err != nil {
+		t.Fatalf("set current_day: %v", err)
+	}
+}
+
+func TestSunkenTemple_TidalWarningDay4(t *testing.T) {
+	setupZoneRunTestDB(t)
+	uid := id.UserID("@exp-tidal-d4:example")
+	defer cleanupExpeditions(uid)
+
+	exp, err := startExpedition(uid, ZoneSunkenTemple, "",
+		ExpeditionSupplies{Current: 30, Max: 30, DailyBurn: 1.5, HarshMod: 1.5})
+	if err != nil {
+		t.Fatal(err)
+	}
+	setExpDay(t, exp.ID, 3) // → briefing rolls to Day 4
+	exp, _ = getExpedition(exp.ID)
+
+	p := &AdventurePlugin{}
+	startSU := exp.Supplies.Current
+	if err := p.deliverBriefing(exp, time.Now().UTC()); err != nil {
+		t.Fatal(err)
+	}
+
+	got, _ := getExpedition(exp.ID)
+	if got.CurrentDay != 4 {
+		t.Fatalf("CurrentDay = %d, want 4", got.CurrentDay)
+	}
+	// Warning day: NO doubled burn — single 1.5 SU burn.
+	if got.Supplies.Current != startSU-1.5 {
+		t.Errorf("supplies = %v, want %v (single burn)", got.Supplies.Current, startSU-1.5)
+	}
+	entries, _ := recentExpeditionLog(exp.ID, 10)
+	foundWarn := false
+	for _, e := range entries {
+		if e.Type == "temporal" && strings.Contains(e.Summary, "tidal warning") {
+			foundWarn = true
+		}
+	}
+	if !foundWarn {
+		t.Error("expected a 'temporal' tidal-warning log entry on Day 4")
+	}
+}
+
+func TestSunkenTemple_TidalEventDay6_ForcesDoubleBurn(t *testing.T) {
+	setupZoneRunTestDB(t)
+	uid := id.UserID("@exp-tidal-d6:example")
+	defer cleanupExpeditions(uid)
+
+	// Tier-2 supplies: HarshMod 1.5 normally. Tidal must force 2×.
+	exp, err := startExpedition(uid, ZoneSunkenTemple, "",
+		ExpeditionSupplies{Current: 30, Max: 30, DailyBurn: 1.5, HarshMod: 1.5})
+	if err != nil {
+		t.Fatal(err)
+	}
+	setExpDay(t, exp.ID, 5) // → rolls to Day 6
+	exp, _ = getExpedition(exp.ID)
+
+	p := &AdventurePlugin{}
+	startSU := exp.Supplies.Current
+	if err := p.deliverBriefing(exp, time.Now().UTC()); err != nil {
+		t.Fatal(err)
+	}
+
+	got, _ := getExpedition(exp.ID)
+	if got.CurrentDay != 6 {
+		t.Fatalf("CurrentDay = %d, want 6", got.CurrentDay)
+	}
+	// Forced 2× burn = 1.5 * 2 = 3.0 SU
+	wantBurn := float32(3.0)
+	if startSU-got.Supplies.Current != wantBurn {
+		t.Errorf("burn = %v, want %v (forced 2× tidal)", startSU-got.Supplies.Current, wantBurn)
+	}
+	entries, _ := recentExpeditionLog(exp.ID, 10)
+	foundEvent := false
+	for _, e := range entries {
+		if e.Type == "temporal" && strings.Contains(e.Summary, "tidal peak") {
+			foundEvent = true
+		}
+	}
+	if !foundEvent {
+		t.Error("expected a 'temporal' tidal-peak log entry on Day 6")
+	}
+}
+
+func TestSunkenTemple_BossDefeatedSilencesTidal(t *testing.T) {
+	setupZoneRunTestDB(t)
+	uid := id.UserID("@exp-tidal-boss:example")
+	defer cleanupExpeditions(uid)
+
+	exp, err := startExpedition(uid, ZoneSunkenTemple, "",
+		ExpeditionSupplies{Current: 30, Max: 30, DailyBurn: 1.5, HarshMod: 1.5})
+	if err != nil {
+		t.Fatal(err)
+	}
+	if _, err := db.Get().Exec(
+		`UPDATE dnd_expedition SET boss_defeated = 1, current_day = 5 WHERE expedition_id = ?`,
+		exp.ID); err != nil {
+		t.Fatal(err)
+	}
+	exp, _ = getExpedition(exp.ID)
+
+	p := &AdventurePlugin{}
+	startSU := exp.Supplies.Current
+	if err := p.deliverBriefing(exp, time.Now().UTC()); err != nil {
+		t.Fatal(err)
+	}
+
+	got, _ := getExpedition(exp.ID)
+	// Single normal burn, no tidal multiplier.
+	if got.Supplies.Current != startSU-1.5 {
+		t.Errorf("supplies = %v, want %v (no tidal mult)", got.Supplies.Current, startSU-1.5)
+	}
+	entries, _ := recentExpeditionLog(exp.ID, 10)
+	for _, e := range entries {
+		if e.Type == "temporal" {
+			t.Errorf("did not expect temporal log entry post-boss; got %+v", e)
+		}
+	}
+}
+
+func TestSunkenTemple_NoTidalOnNonZone(t *testing.T) {
+	setupZoneRunTestDB(t)
+	uid := id.UserID("@exp-tidal-other:example")
+	defer cleanupExpeditions(uid)
+
+	exp, err := startExpedition(uid, ZoneGoblinWarrens, "",
+		ExpeditionSupplies{Current: 20, Max: 20, DailyBurn: 1, HarshMod: 1})
+	if err != nil {
+		t.Fatal(err)
+	}
+	setExpDay(t, exp.ID, 5)
+	exp, _ = getExpedition(exp.ID)
+
+	p := &AdventurePlugin{}
+	startSU := exp.Supplies.Current
+	if err := p.deliverBriefing(exp, time.Now().UTC()); err != nil {
+		t.Fatal(err)
+	}
+	got, _ := getExpedition(exp.ID)
+	if got.Supplies.Current != startSU-1 {
+		t.Errorf("non-tidal zone burned %v, want 1", startSU-got.Supplies.Current)
+	}
+}