feat: ship Tier 1 — auth, authz, rate limits, real notifications, CSV import, billing, backups/DR, privacy

Closes every block in docs/TIER1_PLAN.md from the Claude-scope side. The
homelab / cloud setup steps (SES verification, restore drill, lawyer-
drafted ToS) remain operator-owned but are unblocked.

Block A — Authentication
- Migration 0003: password_hash, email_verified, email_verification_tokens,
  password_reset_tokens, refresh_tokens (with replaced_by family chain).
- Bcrypt hasher, HS256 JWT signer, single-use refresh tokens with rotation
  + replay-detection (revokes the family on reuse).
- /auth/signup, /login, /refresh, /logout, /verify-email,
  /forgot-password, /reset-password — enumeration-safe.
- requireAuth middleware + GET /me.
- Frontend useAuth/useApi with auto-refresh-on-401, login/signup/verify/
  forgot/reset pages, route-guard middleware.

Block B — Authorisation
- EventRepo.GetForHost; Update/Delete scoped by host_id.
- All host routes behind requireAuth + ownership; cross-tenant returns
  404 (no enumeration). ?host_id removed.
- WS auth via short-lived single-use tickets (POST /auth/ws-ticket).
- Tests: TestCrossTenantIsolation — 9 probes.

Block C — Rate limiting
- Redis sliding-window via Lua (atomic ZADD+ZCARD+PEXPIRE).
- Per-route limits matching the plan (signup IP, login IP+email, RSVP/
  access by token, events/guests/tokens by user_id).
- 429 with Retry-After header and JSON body.
- Auth lockout: 5 failed logins → account locked, only password reset
  clears it.
- Frontend: useErrMessage normalises 429 + locked messaging.

Block D — Real notifications
- Migration 0004: provider_message_id, bounce_type, complained columns
  + unsubscribes (CITEXT) suppression table.
- Branded HTML + plaintext templates for verification, reset, invitation,
  confirmation, reminder. Per-page templates avoid html/template's
  contextual-escape collisions.
- Senders: SESv2, Twilio (SMS), SMTP (Mailpit-friendly), Resend HTTP.
- PickEmailSender priority Resend > SMTP > SES > Log — system boots
  cleanly in dev with Mailpit; production flips one env var.
- Webhook endpoints (Twilio status + SES SNS) — bounces add to suppression;
  signature verification stubbed pending creds.
- Auto-send: POST /tokens publishes invitation.send; notifier renders +
  delivers via the configured backend; suppression list honoured.
- Bulk + per-row invitation flow: POST /events/{id}/guests/invitations/bulk
  returns per-guest tokens so phone-only guests can be SMS'd manually.
- Unsubscribe: signed HMAC token (no TTL) + /unsubscribe/[token] page.
- WhatsApp Option A+: wa.me click-to-chat wizard with per-guest progress
  tracking, isLikelyE164 validation, edit-from-wizard.
- Token rotate (POST /tokens/rotate) invalidates the old URL — used by
  the regenerate-link flow.
- Mailpit added to docker-compose for dev inbox.

Block E — CSV import
- Streaming parser: tolerant header detection, UTF-8 BOM + UTF-16 LE/BE
  decoding, row-level validation, 5,000-row cap.
- Strict E.164 phone validation with helpful error message.
- POST /preview + /import + GET /template; preview UI on event page;
  atomic per-batch with dedup on existing emails.

Phone capture across UI
- PhoneInput component: country picker (~50 ISO codes) + national input +
  live E.164 preview + inline length validation.
- Used in Add Guest and Edit Guest modals. Smart paste-handling extracts
  country code from full E.164 strings.

Block F — Billing (Stripe)
- Migration 0005: subscriptions table (user_id → tier/status/period_end +
  Stripe customer/sub ids). Partial unique index keeps one granting sub
  per user.
- internal/billing: Tier + Limits model (Free 1/50, Pro 10/1000, Business
  ∞/5000), Stripe SDK wrapper with IgnoreAPIVersionMismatch for newer
  account API versions.
- /billing/checkout-session, /billing/portal, /billing/status,
  /webhooks/stripe (signature-verified, lifecycle events).
- Tier enforcement: 402 on POST /events, /guests, /import with
  {error, reason, tier, used, limit, upgrade_url} body.
- Frontend: useBilling composable, /dashboard/billing page (current plan,
  usage bars, tier cards), global UpgradeModal triggered by useApi's
  402 interceptor.
- Customer portal kept for self-service cancel/payment-method changes.

Block G — Backups & DR (application side)
- Every migration has a tested .down.sql.
- TestMigrationRoundtrip applies all ups → all downs → all ups against a
  fresh container; catches asymmetric down migrations.
- cmd/restore-verify: 28-check post-restore invariant tool (schema
  presence, no orphans across 10 FK relationships, email uniqueness,
  single-active subscription, row-count snapshot).
- docs/RUNBOOK_RESTORE.md: 9-step restore procedure with RTO/RPO
  targets, drill instructions, rollback path.

Block H — Privacy compliance (application side)
- Migration 0006: deleted_at + terms_accepted_at + privacy_policy_accepted_at
  on users. Partial index on email for live-only uniqueness.
- GET /me/data-export — synchronous JSON dump (user, events, guests,
  tokens, rsvps, access_logs, notifications).
- DELETE /me — soft-delete with PII scrub + refresh-token revocation;
  re-signup with same email works.
- POST /me/accept-terms — idempotent consent recording.
- Frontend /privacy + /terms placeholder pages with substantive (pending
  legal review) copy; footer links; signup terms checkbox; TermsGateModal
  for accounts created before the rollout; export + delete buttons on
  /dashboard/billing.

Tests
- All migrations verified up/down/up.
- Integration suite: TestE2EHappyPath, TestAuthFlow, TestCrossTenantIsolation,
  TestRateLimitSignup, TestLoginLockout, TestUnsubscribeFlow,
  TestSESBounceWebhook, TestTwilioStatusWebhook, TestCsvImportFlow,
  TestCsvImportAtomicRollback, TestBulkIssueInvitations, TestBulkIssueExplicitSubset,
  TestTokenIssuePublishesInvitation, TestTokenIssueWithoutGuestEmailSkipsInvitation,
  TestGuestUpdate, TestGuestDelete, TestTokenRotate, TestSMTPSenderAgainstMailpit,
  TestFreeTierEventLimit, TestFreeTierGuestLimit, TestBusinessTierBypassesLimits,
  TestDataExport, TestDeleteMe, TestAcceptTerms, TestMigrationRoundtrip.
  Full suite runs in ~120s against real Postgres + NATS + Redis + Mailpit.
- Unit suite green across internal/auth, internal/csvimport,
  internal/notification, internal/ratelimit, internal/domain.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

test/integration/invitation_send_test.go

@@ -0,0 +1,218 @@
+//go:build integration
+
+package integration_test
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log/slog"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"sync/atomic"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+
+	"github.com/alchemistkay/guestguard/internal/api"
+	"github.com/alchemistkay/guestguard/internal/natspub"
+	"github.com/alchemistkay/guestguard/internal/storage"
+)
+
+// TestTokenIssuePublishesInvitation walks the new wire-up: issuing a
+// token for a guest with an email-on-file should publish an
+// invitation.send event over NATS, and the API response should reflect
+// that the invitation was queued.
+func TestTokenIssuePublishesInvitation(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping integration test in -short mode")
+	}
+
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
+	t.Cleanup(cancel)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+
+	dsn := startPostgres(t, ctx)
+	natsURL := startNATS(t, ctx)
+
+	db, err := storage.NewDB(ctx, dsn)
+	must(t, err, "connect db")
+	t.Cleanup(db.Close)
+	must(t, db.Migrate(ctx), "migrate")
+
+	natsClient, err := natspub.Connect(ctx, natsURL, logger)
+	must(t, err, "connect nats")
+	t.Cleanup(natsClient.Close)
+
+	// Subscribe before issuing — JetStream replay is on by default but
+	// this guarantees we don't race the consumer setup.
+	var seen atomic.Int32
+	captured := make(chan natspub.InvitationSend, 1)
+	sub, err := natspub.NewInvitationSendSubscriber(ctx, natsClient, "test-invitation-send",
+		func(ctx context.Context, evt natspub.InvitationSend) error {
+			seen.Add(1)
+			select {
+			case captured <- evt:
+			default:
+			}
+			return nil
+		}, logger)
+	must(t, err, "build subscriber")
+	cc, err := sub.Start(ctx)
+	must(t, err, "start subscriber")
+	t.Cleanup(cc.Stop)
+
+	apiSrv, err := api.NewServer(api.ServerDeps{
+		Logger:               logger,
+		DB:                   db,
+		AccessPublisher:      natsClient,
+		RSVPPublisher:        natsClient,
+		InvitationPublisher:  natsClient,
+		TokenTTL:             24 * time.Hour,
+		JWTSecret:            testJWTSecret,
+		JWTIssuer:            testJWTIssuer,
+		AccessTokenTTL:       5 * time.Minute,
+		RefreshTokenTTL:      24 * time.Hour,
+		EmailVerificationTTL: 1 * time.Hour,
+		PasswordResetTTL:     1 * time.Hour,
+		PublicBaseURL:        "https://gg.example.test",
+	})
+	must(t, err, "build api server")
+	srv := httptest.NewServer(apiSrv.Handler())
+	t.Cleanup(srv.Close)
+
+	hostID := insertHost(t, ctx, db.Pool)
+	token := issueHostToken(t, hostID)
+
+	eventID := createEvent(t, srv.URL, token, "Invitation Test", "invitation-test")
+	guestID, guestEmail := createGuestWithEmail(t, srv.URL, token, eventID, "Mira")
+
+	var issued struct {
+		Token            string `json:"token"`
+		InvitationQueued bool   `json:"invitation_queued"`
+		InvitationLink   string `json:"invitation_link"`
+	}
+	postJSONAuthed(t,
+		fmt.Sprintf("%s/events/%s/guests/%s/tokens", srv.URL, eventID, guestID),
+		token, nil, http.StatusCreated, &issued)
+
+	if !issued.InvitationQueued {
+		t.Fatalf("expected invitation_queued=true (response: %+v)", issued)
+	}
+	if !strings.HasPrefix(issued.InvitationLink, "https://gg.example.test/rsvp/tk_") {
+		t.Fatalf("invitation_link should use publicBaseURL: got %q", issued.InvitationLink)
+	}
+
+	select {
+	case evt := <-captured:
+		if evt.GuestID.String() != guestID.String() {
+			t.Errorf("guest id: got %s want %s", evt.GuestID, guestID)
+		}
+		if evt.GuestEmail != guestEmail {
+			t.Errorf("guest email: got %s want %s", evt.GuestEmail, guestEmail)
+		}
+		if evt.EventName != "Invitation Test" {
+			t.Errorf("event name: got %s", evt.EventName)
+		}
+		if !strings.HasPrefix(evt.Link, "https://gg.example.test/rsvp/tk_") {
+			t.Errorf("link: got %s", evt.Link)
+		}
+	case <-time.After(10 * time.Second):
+		t.Fatalf("did not see invitation.send within 10s (seen=%d)", seen.Load())
+	}
+}
+
+// TestTokenIssueWithoutGuestEmailSkipsInvitation confirms that a guest
+// with no email on file does NOT trigger a publish — the host still gets
+// a copy-pasteable link.
+func TestTokenIssueWithoutGuestEmailSkipsInvitation(t *testing.T) {
+	if testing.Short() {
+		t.Skip("skipping integration test in -short mode")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 3*time.Minute)
+	t.Cleanup(cancel)
+	logger := slog.New(slog.NewTextHandler(io.Discard, nil))
+
+	dsn := startPostgres(t, ctx)
+	natsURL := startNATS(t, ctx)
+
+	db, err := storage.NewDB(ctx, dsn)
+	must(t, err, "connect db")
+	t.Cleanup(db.Close)
+	must(t, db.Migrate(ctx), "migrate")
+
+	natsClient, err := natspub.Connect(ctx, natsURL, logger)
+	must(t, err, "connect nats")
+	t.Cleanup(natsClient.Close)
+
+	var invitations atomic.Int32
+	sub, err := natspub.NewInvitationSendSubscriber(ctx, natsClient, "test-no-email-invitation",
+		func(ctx context.Context, evt natspub.InvitationSend) error {
+			invitations.Add(1)
+			return nil
+		}, logger)
+	must(t, err, "build subscriber")
+	cc, err := sub.Start(ctx)
+	must(t, err, "start subscriber")
+	t.Cleanup(cc.Stop)
+
+	apiSrv, err := api.NewServer(api.ServerDeps{
+		Logger:               logger,
+		DB:                   db,
+		AccessPublisher:      natsClient,
+		RSVPPublisher:        natsClient,
+		InvitationPublisher:  natsClient,
+		TokenTTL:             24 * time.Hour,
+		JWTSecret:            testJWTSecret,
+		JWTIssuer:            testJWTIssuer,
+		AccessTokenTTL:       5 * time.Minute,
+		RefreshTokenTTL:      24 * time.Hour,
+		EmailVerificationTTL: 1 * time.Hour,
+		PasswordResetTTL:     1 * time.Hour,
+		PublicBaseURL:        "http://localhost",
+	})
+	must(t, err, "build api server")
+	srv := httptest.NewServer(apiSrv.Handler())
+	t.Cleanup(srv.Close)
+
+	hostID := insertHost(t, ctx, db.Pool)
+	hostToken := issueHostToken(t, hostID)
+
+	eventID := createEvent(t, srv.URL, hostToken, "No Email Event", "no-email-event")
+	// createGuest helper produces a guest with no email field set.
+	guestID := createGuest(t, srv.URL, hostToken, eventID, "Phone-only Guest")
+
+	var issued struct {
+		InvitationQueued bool `json:"invitation_queued"`
+	}
+	postJSONAuthed(t,
+		fmt.Sprintf("%s/events/%s/guests/%s/tokens", srv.URL, eventID, guestID),
+		hostToken, nil, http.StatusCreated, &issued)
+	if issued.InvitationQueued {
+		t.Fatalf("expected invitation_queued=false for emailless guest")
+	}
+
+	// Give NATS a moment to surface any (unwanted) message.
+	time.Sleep(500 * time.Millisecond)
+	if invitations.Load() != 0 {
+		t.Fatalf("expected 0 invitation.send messages, got %d", invitations.Load())
+	}
+}
+
+// createGuestWithEmail is a thin wrapper that adds an email field, since
+// the existing helper omits it.
+func createGuestWithEmail(t *testing.T, base, accessToken string, eventID uuid.UUID, name string) (uuid.UUID, string) {
+	t.Helper()
+	email := fmt.Sprintf("guest-%d@example.test", time.Now().UnixNano())
+	body := map[string]any{"name": name, "email": email}
+	var out struct{ ID uuid.UUID `json:"id"` }
+	postJSONAuthed(t, fmt.Sprintf("%s/events/%s/guests", base, eventID), accessToken,
+		body, http.StatusCreated, &out)
+	return out.ID, email
+}
+
+// Avoid the import being marked unused if a future refactor drops it.
+var _ = json.Marshal