fix: adminnotify observability — money-critical rows sort first, flood-cap suppression surfaced to operator, stale coordination doc fixed

- notifications priority ordering: money-critical reasons (webhooks, sweeps, refunds, gift-card, manual-refund failures) above routine
- admin notifications page exposes the flood-cap suppressed count
- adminnotify.go contract doc: removed stale 2FA reissue-fail site, current insert-site list

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

backend/handlers/notifications/notifications.go

@@ -3,6 +3,7 @@ package notifications
 import (
 	"context"
 	"crussell/db"
+	"crussell/internal/adminnotify"
 	"crussell/internal/validators"
 	"database/sql"
 	"encoding/json"
@@ -27,8 +28,24 @@ type AdminNotification struct {
 	UserID           *string    `json:"user_id,omitempty"`
 	UserName         *string    `json:"user_name,omitempty"`
 	BookingStartTime *time.Time `json:"booking_start_time,omitempty"`
-	AcknowledgedAt   *time.Time `json:"acknowledged_at,omitempty"`
-	CreatedAt        time.Time  `json:"created_at"`
+	// Money-critical event detail (amount / square id / description): populated
+	// by the 'critical_payment_log' / 'refund_failed' insert sites when they
+	// adopt the admin_notifications event-detail columns (see the column
+	// contract on adminnotify.go) so the operator can see WHAT happened without
+	// opening the CRITICAL logs.
+	Amount         *float64   `json:"amount,omitempty"`
+	SquareID       *string    `json:"square_id,omitempty"`
+	Description    *string    `json:"description,omitempty"`
+	AcknowledgedAt *time.Time `json:"acknowledged_at,omitempty"`
+	CreatedAt      time.Time  `json:"created_at"`
+}
+
+// AdminNotificationSuppression is one flood-cap suppression counter for a
+// capped reason whose unacknowledged queue is still at the cap.
+type AdminNotificationSuppression struct {
+	Reason           string    `json:"reason"`
+	SuppressedCount  int       `json:"suppressed_count"`
+	LastSuppressedAt time.Time `json:"last_suppressed_at"`
 }
 
 type AdminNotificationListResponse struct {
@@ -37,6 +54,13 @@ type AdminNotificationListResponse struct {
 	PerPage       int                 `json:"per_page"`
 	Total         int                 `json:"total"`
 	NextCursor    *string             `json:"next_cursor,omitempty"`
+	// Suppressed is how many money-critical alerts were dropped by the flood cap
+	// (adminnotify.MaxUnacknowledgedCriticalLogs) while each reason's
+	// unacknowledged queue stayed at the cap — the "suppressed this cycle"
+	// count. It resets once the operator works the queue down. SuppressedDetails
+	// carries the per-reason breakdown.
+	Suppressed        int                            `json:"suppressed"`
+	SuppressedDetails []AdminNotificationSuppression `json:"suppressed_details,omitempty"`
 }
 
 // parseCursor splits a "createdAt|id" cursor string into its components.
@@ -47,6 +71,13 @@ type AdminNotificationListResponse struct {
 //	cursor, per_page — pagination (cursor-based)
 //	include_acknowledged — if "true", returns all notifications sorted newest-first.
 //	  Default (false/omitted): only unacknowledged, sorted by priority then oldest-first.
+//	  Money-critical reasons ('critical_payment_log', 'refund_failed',
+//	  'refresh_token_reuse', 'gift_card_purchased_for_friend') sort ABOVE routine
+//	  notifications so the operator's only pager surfaces money/security events first.
+//	reason — filter to a single reason.
+//	The response additionally carries the flood-cap "suppressed this cycle" count
+//	  (suppressed / suppressed_details) for reasons whose unacknowledged queue is
+//	  still at adminnotify.MaxUnacknowledgedCriticalLogs.
 func GetNotifications(w http.ResponseWriter, r *http.Request) {
 	// Parse query params
 	perPage := 20
@@ -63,6 +94,7 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 		SELECT an.id, an.reason, an.booking_id, an.user_id,
 		       u.n_first_name || ' ' || u.n_last_name AS user_name,
 		       b.start_time AS booking_start_time,
+		       an.amount, an.square_id, an.description,
 		       an.acknowledged_at, an.created_at
 		FROM admin_notifications an
 		LEFT JOIN users u ON an.user_id = u.id
@@ -108,16 +140,24 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 		baseQuery += " ORDER BY an.created_at DESC, an.id DESC"
 	} else {
 		baseQuery += ` ORDER BY CASE an.reason
-			WHEN 'pending_booking' THEN 1
-			WHEN 'cancelled_booking' THEN 2
-			WHEN 'late_cancellation' THEN 3
-			WHEN 'deposit_paid' THEN 4
-			WHEN 'affiliate_claim' THEN 5
-			WHEN 'edit_requested' THEN 6
-			WHEN 'new_booking' THEN 7
-			WHEN '1_month_no_pay' THEN 8
-			WHEN '1_week_no_pay' THEN 9
-			ELSE 10
+			WHEN 'critical_payment_log' THEN 1
+			WHEN 'refund_failed' THEN 2
+			WHEN 'refresh_token_reuse' THEN 3
+			WHEN 'gift_card_purchased_for_friend' THEN 4
+			WHEN 'pending_booking' THEN 5
+			WHEN 'cancelled_booking' THEN 6
+			WHEN 'late_cancellation' THEN 7
+			WHEN 'deposit_paid' THEN 8
+			WHEN 'affiliate_claim' THEN 9
+			WHEN 'edit_requested' THEN 10
+			WHEN 'new_booking' THEN 11
+			WHEN '1_month_no_pay' THEN 12
+			WHEN '1_week_no_pay' THEN 13
+			WHEN 'rescheduled_booking' THEN 14
+			WHEN 'edit_request' THEN 15
+			WHEN 'deposit_not_paid_by_deadline' THEN 16
+			WHEN 'default_hours_changed' THEN 17
+			ELSE 18
 		END, an.created_at ASC, an.id ASC`
 	}
 	baseQuery += fmt.Sprintf(" LIMIT $%d", param)
@@ -149,6 +189,9 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 		var userID sql.NullString
 		var userName sql.NullString
 		var bookingStartTime sql.NullTime
+		var amount sql.NullFloat64
+		var squareID sql.NullString
+		var description sql.NullString
 		var acknowledgedAt sql.NullTime
 
 		err := rows.Scan(
@@ -158,6 +201,9 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 			&userID,
 			&userName,
 			&bookingStartTime,
+			&amount,
+			&squareID,
+			&description,
 			&acknowledgedAt,
 			&n.CreatedAt,
 		)
@@ -179,6 +225,15 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 		if bookingStartTime.Valid {
 			n.BookingStartTime = &bookingStartTime.Time
 		}
+		if amount.Valid {
+			n.Amount = &amount.Float64
+		}
+		if squareID.Valid {
+			n.SquareID = &squareID.String
+		}
+		if description.Valid {
+			n.Description = &description.String
+		}
 		if acknowledgedAt.Valid {
 			n.AcknowledgedAt = &acknowledgedAt.Time
 		}
@@ -206,6 +261,20 @@ func GetNotifications(w http.ResponseWriter, r *http.Request) {
 		NextCursor:    nextCursor,
 	}
 
+	if suppressions, err := adminnotify.ActiveSuppressions(r.Context(), db.Conn); err != nil {
+		log.Printf("Failed to fetch flood-cap suppressions: %v", err)
+	} else {
+		resp.SuppressedDetails = make([]AdminNotificationSuppression, 0, len(suppressions))
+		for _, s := range suppressions {
+			resp.Suppressed += s.SuppressedCount
+			resp.SuppressedDetails = append(resp.SuppressedDetails, AdminNotificationSuppression{
+				Reason:           s.Reason,
+				SuppressedCount:  s.SuppressedCount,
+				LastSuppressedAt: s.LastSuppressedAt,
+			})
+		}
+	}
+
 	if err := json.NewEncoder(w).Encode(resp); err != nil {
 		log.Printf("Failed to encode response: %v", err)
 		http.Error(w, "Internal server error", http.StatusInternalServerError)

backend/handlers/notifications/notifications_extended_test.go

@@ -14,6 +14,7 @@ import (
 	"time"
 
 	"crussell/db"
+	"crussell/internal/adminnotify"
 	"crussell/mw"
 	"crussell/testutils"
 
@@ -691,3 +692,196 @@ func TestAcknowledgeNotification_BeginError(t *testing.T) {
 		t.Errorf("expected 500, got %d. body: %s", w.Code, w.Body.String())
 	}
 }
+
+// =============================================================================
+// Money-critical priority ordering (FIX 2)
+// =============================================================================
+
+// TestNotifications_Priority_MoneyCriticalFirst pins FIX 2: money-critical
+// reasons (webhook/sweep 'critical_payment_log', 'refund_failed',
+// 'refresh_token_reuse', gift-card events) must sort ABOVE routine
+// notifications in the unacknowledged feed so the operator's only pager
+// surfaces money/security events first. The money rows are inserted LAST to
+// prove the priority CASE — not insertion order — drives the sort.
+func TestNotifications_Priority_MoneyCriticalFirst(t *testing.T) {
+	t.Parallel()
+	ctx, tx := testutils.SetupTestTx(t)
+	userID := createTestUser(t, ctx, tx)
+
+	moneyReasons := []string{
+		"critical_payment_log",
+		"refund_failed",
+		"refresh_token_reuse",
+		"gift_card_purchased_for_friend",
+	}
+	routineReasons := []string{
+		"pending_booking",
+		"cancelled_booking",
+		"late_cancellation",
+		"deposit_paid",
+		"affiliate_claim",
+		"edit_requested",
+		"new_booking",
+		"1_month_no_pay",
+		"1_week_no_pay",
+		"rescheduled_booking",
+		"edit_request",
+		"deposit_not_paid_by_deadline",
+		"default_hours_changed",
+	}
+	moneySet := make(map[string]bool, len(moneyReasons))
+	for _, r := range moneyReasons {
+		moneySet[r] = true
+	}
+
+	for _, reason := range routineReasons {
+		createNotification(t, ctx, tx, reason, userID, false)
+	}
+	for _, reason := range moneyReasons {
+		createNotification(t, ctx, tx, reason, userID, false)
+	}
+
+	handler := http.HandlerFunc(GetNotifications)
+	w := makeExtendedAdminRequest(handler, "GET", "/api/admin/notifications", nil, ctx)
+
+	var resp AdminNotificationListResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to unmarshal: %v", err)
+	}
+
+	if len(resp.Notifications) != len(moneyReasons)+len(routineReasons) {
+		t.Fatalf("expected %d notifications, got %d", len(moneyReasons)+len(routineReasons), len(resp.Notifications))
+	}
+
+	// Every money-critical reason must appear strictly before the first routine
+	// reason; each money reason must be present.
+	lastMoney := -1
+	firstRoutine := len(resp.Notifications)
+	for i, n := range resp.Notifications {
+		if moneySet[n.Reason] {
+			lastMoney = i
+		} else if firstRoutine == len(resp.Notifications) {
+			firstRoutine = i
+		}
+	}
+	if lastMoney == -1 {
+		t.Fatal("expected at least one money-critical reason in the response")
+	}
+	if lastMoney > firstRoutine {
+		t.Errorf("money-critical reasons must sort above routine notifications: last money position %d, first routine position %d", lastMoney, firstRoutine)
+	}
+}
+
+// =============================================================================
+// Flood-cap suppression count in the response (FIX 3a)
+// =============================================================================
+
+// TestNotifications_Response_SuppressedCount pins FIX 3a: when the flood cap
+// has suppressed alerts, GET /api/admin/notifications exposes the per-reason
+// "suppressed this cycle" count, and acknowledging the queue back below the cap
+// resets it to zero.
+func TestNotifications_Response_SuppressedCount(t *testing.T) {
+	t.Parallel()
+	ctx, tx := testutils.SetupTestTx(t)
+	userID := createTestUser(t, ctx, tx)
+	handler := http.HandlerFunc(GetNotifications)
+
+	// No suppressions yet → the response reports zero.
+	w := makeExtendedAdminRequest(handler, "GET", "/api/admin/notifications", nil, ctx)
+	var resp AdminNotificationListResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to unmarshal: %v", err)
+	}
+	if resp.Suppressed != 0 {
+		t.Errorf("expected suppressed 0 before any cap hit, got %d", resp.Suppressed)
+	}
+	if len(resp.SuppressedDetails) != 0 {
+		t.Errorf("expected no suppressed_details before any cap hit, got %d", len(resp.SuppressedDetails))
+	}
+
+	// Fill the critical_payment_log queue to the cap, then hit the cap twice the
+	// way an insert site would (pre-check records each suppression).
+	for i := 0; i < adminnotify.MaxUnacknowledgedCriticalLogs; i++ {
+		if _, err := tx.Exec(ctx, `
+			INSERT INTO admin_notifications (reason, user_id, created_at)
+			VALUES ('critical_payment_log', $1, NOW())
+		`, userID); err != nil {
+			t.Fatalf("failed to fill the queue to the cap: %v", err)
+		}
+	}
+	if !adminnotify.CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
+		t.Fatal("expected the queue to be at the cap")
+	}
+	if !adminnotify.CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
+		t.Fatal("expected the queue to stay at the cap")
+	}
+
+	w = makeExtendedAdminRequest(handler, "GET", "/api/admin/notifications", nil, ctx)
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to unmarshal: %v", err)
+	}
+	if resp.Suppressed != 2 {
+		t.Errorf("expected suppressed 2, got %d", resp.Suppressed)
+	}
+	if len(resp.SuppressedDetails) != 1 {
+		t.Fatalf("expected 1 suppressed_details entry, got %d", len(resp.SuppressedDetails))
+	}
+	if resp.SuppressedDetails[0].Reason != "critical_payment_log" {
+		t.Errorf("expected suppressed_details reason critical_payment_log, got %s", resp.SuppressedDetails[0].Reason)
+	}
+	if resp.SuppressedDetails[0].SuppressedCount != 2 {
+		t.Errorf("expected suppressed_details count 2, got %d", resp.SuppressedDetails[0].SuppressedCount)
+	}
+
+	// Acknowledging the queue below the cap resets the visible count.
+	if _, err := tx.Exec(ctx, "UPDATE admin_notifications SET acknowledged_at = NOW() WHERE reason = 'critical_payment_log'"); err != nil {
+		t.Fatalf("failed to acknowledge the queue: %v", err)
+	}
+	w = makeExtendedAdminRequest(handler, "GET", "/api/admin/notifications", nil, ctx)
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to unmarshal: %v", err)
+	}
+	if resp.Suppressed != 0 {
+		t.Errorf("expected suppressed 0 after the queue was worked down, got %d", resp.Suppressed)
+	}
+}
+
+// TestNotifications_Response_CarriesEventDetail pins FIX 3b: the GET endpoint
+// surfaces the money-critical event detail columns (amount, square_id,
+// description) when the insert site has populated them.
+func TestNotifications_Response_CarriesEventDetail(t *testing.T) {
+	t.Parallel()
+	ctx, tx := testutils.SetupTestTx(t)
+
+	var notificationID string
+	err := tx.QueryRow(ctx, `
+		INSERT INTO admin_notifications (reason, amount, square_id, description)
+		VALUES ('critical_payment_log', 42.50, 'sq_dispute_123', 'Dispute received for charge 42.50')
+		RETURNING id
+	`).Scan(&notificationID)
+	if err != nil {
+		t.Fatalf("failed to create notification with event detail: %v", err)
+	}
+
+	handler := http.HandlerFunc(GetNotifications)
+	w := makeExtendedAdminRequest(handler, "GET", "/api/admin/notifications", nil, ctx)
+
+	var resp AdminNotificationListResponse
+	if err := json.Unmarshal(w.Body.Bytes(), &resp); err != nil {
+		t.Fatalf("failed to unmarshal: %v", err)
+	}
+
+	if len(resp.Notifications) != 1 {
+		t.Fatalf("expected 1 notification, got %d", len(resp.Notifications))
+	}
+	n := resp.Notifications[0]
+	if n.Amount == nil || *n.Amount != 42.50 {
+		t.Errorf("expected amount 42.50, got %v", n.Amount)
+	}
+	if n.SquareID == nil || *n.SquareID != "sq_dispute_123" {
+		t.Errorf("expected square_id sq_dispute_123, got %v", n.SquareID)
+	}
+	if n.Description == nil || *n.Description != "Dispute received for charge 42.50" {
+		t.Errorf("expected description populated, got %v", n.Description)
+	}
+}

backend/internal/adminnotify/adminnotify.go

@@ -2,39 +2,47 @@
 // notification centre (admin_notifications). That table is the single
 // operator's ONLY pager for money events, so every site that inserts an
 // operator-facing alert must bound its unacknowledged queue — a hostile flood
-// (attacker-registered accounts triggering refresh_token_reuse / reissue-fail /
-// webhook alerts) must not be able to bury the notification centre under rows
-// the operator can never work through.
+// (attacker-registered accounts triggering refresh_token_reuse / webhook
+// alerts) must not be able to bury the notification centre under rows the
+// operator can never work through.
 //
 // Coordination contract (Round 2 Loop B finding 1): the cap is applied
 // atomically at every insert site in this codebase:
 //
-//   - handlers/payments/twofa.go — the reissue-fail alert (per-issue capped,
-//     see finding 2; NOT globally capped).
 //   - auth/jwt.go VerifyRefreshToken — the 'refresh_token_reuse' alert.
-//   - handlers/webhooks/square.go — the three critical_payment_log inserts
+//   - handlers/webhooks/square.go — the 'critical_payment_log' inserts
 //     (dispute, booking, unknown-event, orphan-replay).
 //   - handlers/user/account.go InsertSquareErasureCriticalNotification.
+//   - handlers/payments/sweep.go insertCriticalPaymentNotification.
+//   - handlers/scheduling/time-blockers.go InsertSquareCleanupCriticalNotification
+//     and the deposit-deadline cleanup insert.
+//   - internal/jobs/cleanup.go ScanCriticalPaymentLogs.
+//   - handlers/scheduling/scheduled-cleanup.go — the '1_week_no_pay',
+//     '1_month_no_pay' and 'default_hours_changed' inserts.
+//   - handlers/bookings/bookings.go — the 'new_booking' / 'pending_booking' /
+//     'cancelled_booking' inserts.
+//   - handlers/bookings/manage.go — the 'cancelled_booking' / 'edit_requested'
+//     inserts.
+//   - handlers/payments/refunds.go — the 'refund_failed' insert.
 //
-// Sites owned by OTHER agents (coordination notes):
-//
-//   - handlers/payments/sweep.go insertCriticalPaymentNotification — NOW capped
-//     (same atomic fold + pre-check as every other site).
-//   - handlers/scheduling/time-blockers.go insertSquareCleanupCriticalNotification
-//     and internal/jobs/cleanup.go ScanCriticalPaymentLogs — both NOW capped
-//     (same atomic fold + pre-check as every other site).
-//   - main.go has NO admin_notifications insert sites (it only mounts the
-//     notification read/ack routes), so nothing to cap there.
+// main.go has NO admin_notifications insert sites (it only mounts the
+// notification read/ack routes), so nothing to cap there.
 //
 // Every site folds the cap INTO its INSERT (a conditional
 // `INSERT ... SELECT ... WHERE (SELECT COUNT(*) ...) < $cap`) so the
 // count-then-insert is ATOMIC — closing the TOCTOU where two concurrent
 // inserts both read a below-cap count and overshoot together (finding 2).
+// Every site ALSO pre-checks CriticalLogsCapExceeded to log the suppression;
+// that pre-check is the single choke point that records the suppression in
+// admin_notification_suppressions, so the operator-facing "suppressed this
+// cycle" count on GET /api/admin/notifications stays accurate without any
+// insert site having to change.
 package adminnotify
 
 import (
 	"context"
 	"log"
+	"time"
 
 	"crussell/db"
 )
@@ -58,6 +66,11 @@ const MaxUnacknowledgedCriticalLogs = 100
 // a money alert is never dropped because the count query failed (the insert's
 // own atomic cap condition below still guards the row in that case — the
 // pre-check only decides whether to log a suppression).
+//
+// At the cap the suppression is ALSO recorded in admin_notification_suppressions
+// (recordSuppression) so the admin notifications page can surface how many
+// alerts were dropped. The record write is best-effort too — a failure only
+// loses the counter, never the boolean decision.
 func CriticalLogsCapExceeded(ctx context.Context, q db.Querier, reason string) bool {
 	var n int
 	err := q.QueryRow(ctx, `
@@ -68,5 +81,66 @@ func CriticalLogsCapExceeded(ctx context.Context, q db.Querier, reason string) b
 		log.Printf("adminnotify: failed to count unacknowledged %s admin notifications: %v", reason, err)
 		return false
 	}
-	return n >= MaxUnacknowledgedCriticalLogs
+	if n >= MaxUnacknowledgedCriticalLogs {
+		recordSuppression(ctx, q, reason)
+		return true
+	}
+	return false
+}
+
+// recordSuppression upserts the per-reason flood-cap suppression counter
+// (admin_notification_suppressions). Every insert site funnels its pre-check
+// through CriticalLogsCapExceeded, so a suppression is recorded exactly once
+// per dropped alert, and a running suppressed_count accumulates while the
+// reason's unacknowledged queue stays at the cap. Best-effort: a failure is
+// logged, never propagated — the alert is already being dropped at the cap and
+// the operator-facing counter is informational, not load-bearing.
+func recordSuppression(ctx context.Context, q db.Querier, reason string) {
+	if _, err := q.Exec(ctx, `
+		INSERT INTO admin_notification_suppressions (reason, suppressed_count, first_suppressed_at, last_suppressed_at)
+		VALUES ($1::admin_notification_reason, 1, NOW(), NOW())
+		ON CONFLICT (reason) DO UPDATE SET
+			suppressed_count = admin_notification_suppressions.suppressed_count + 1,
+			last_suppressed_at = NOW()
+	`, reason); err != nil {
+		log.Printf("adminnotify: failed to record flood-cap suppression for %s: %v", reason, err)
+	}
+}
+
+// Suppression is the per-reason flood-cap suppression counter surfaced to the
+// operator: how many alerts were dropped for that reason while its
+// unacknowledged queue sat at MaxUnacknowledgedCriticalLogs.
+type Suppression struct {
+	Reason           string
+	SuppressedCount  int
+	LastSuppressedAt time.Time
+}
+
+// ActiveSuppressions returns the per-reason flood-cap suppressions whose
+// underlying unacknowledged queue is STILL at the cap — i.e. the operator has
+// not yet worked it down ("this cycle"). The admin notifications handler sums
+// these into the response's suppressed count; the count naturally resets once
+// the operator acknowledges the queue back below the cap. Best-effort: the
+// caller must treat a non-nil error as "no suppression data available".
+func ActiveSuppressions(ctx context.Context, q db.Querier) ([]Suppression, error) {
+	rows, err := q.Query(ctx, `
+		SELECT s.reason, s.suppressed_count, s.last_suppressed_at
+		FROM admin_notification_suppressions s
+		WHERE (SELECT COUNT(*) FROM admin_notifications an
+		       WHERE an.reason = s.reason AND an.acknowledged_at IS NULL) >= $1
+		ORDER BY s.last_suppressed_at DESC
+	`, MaxUnacknowledgedCriticalLogs)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []Suppression
+	for rows.Next() {
+		var s Suppression
+		if err := rows.Scan(&s.Reason, &s.SuppressedCount, &s.LastSuppressedAt); err != nil {
+			return nil, err
+		}
+		out = append(out, s)
+	}
+	return out, rows.Err()
 }

backend/internal/adminnotify/adminnotify_test.go

@@ -35,6 +35,7 @@ func TestCriticalLogsCapExceeded(t *testing.T) {
 	ctx := context.Background()
 	t.Cleanup(func() {
 		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notification_suppressions WHERE reason = 'critical_payment_log'")
 	})
 
 	if CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
@@ -70,3 +71,72 @@ func TestCriticalLogsCapExceeded(t *testing.T) {
 		t.Fatal("expected acknowledging the queue to re-arm inserts")
 	}
 }
+
+// TestCriticalLogsCapExceeded_RecordsSuppression pins FIX 3a: hitting the
+// flood cap records the suppression in admin_notification_suppressions (the
+// operator-facing "suppressed this cycle" counter) with a running count, and
+// ActiveSuppressions reports it only while the underlying queue is still at the
+// cap — acknowledging the queue down resets the visible count.
+func TestCriticalLogsCapExceeded_RecordsSuppression(t *testing.T) {
+	ctx := context.Background()
+	t.Cleanup(func() {
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notifications WHERE reason = 'critical_payment_log'")
+		_, _ = db.Conn.Exec(ctx, "DELETE FROM admin_notification_suppressions WHERE reason = 'critical_payment_log'")
+	})
+
+	// Below the cap no suppression is recorded.
+	for i := 0; i < MaxUnacknowledgedCriticalLogs-1; i++ {
+		if _, err := db.Conn.Exec(ctx, `
+			INSERT INTO admin_notifications (reason, created_at)
+			VALUES ('critical_payment_log', NOW())
+		`); err != nil {
+			t.Fatalf("failed to insert row %d: %v", i, err)
+		}
+	}
+	if supps, err := ActiveSuppressions(ctx, db.Conn); err != nil {
+		t.Fatalf("ActiveSuppressions failed below the cap: %v", err)
+	} else if len(supps) != 0 {
+		t.Fatalf("expected no suppression below the cap, got %d", len(supps))
+	}
+
+	// Fill to the cap, then hit it twice: each suppressed alert is recorded.
+	if _, err := db.Conn.Exec(ctx, `
+		INSERT INTO admin_notifications (reason, created_at)
+		VALUES ('critical_payment_log', NOW())
+	`); err != nil {
+		t.Fatalf("failed to insert the cap row: %v", err)
+	}
+	if !CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
+		t.Fatal("expected the queue to be at the cap")
+	}
+	if !CriticalLogsCapExceeded(ctx, db.Conn, "critical_payment_log") {
+		t.Fatal("expected the queue to stay at the cap")
+	}
+
+	supps, err := ActiveSuppressions(ctx, db.Conn)
+	if err != nil {
+		t.Fatalf("ActiveSuppressions failed: %v", err)
+	}
+	if len(supps) != 1 {
+		t.Fatalf("expected exactly 1 suppression record, got %d", len(supps))
+	}
+	if supps[0].Reason != "critical_payment_log" {
+		t.Errorf("expected reason critical_payment_log, got %s", supps[0].Reason)
+	}
+	if supps[0].SuppressedCount != 2 {
+		t.Errorf("expected suppressed_count 2, got %d", supps[0].SuppressedCount)
+	}
+
+	// Acknowledging the queue below the cap makes the suppression inactive, so
+	// the "this cycle" count resets.
+	if _, err := db.Conn.Exec(ctx, "UPDATE admin_notifications SET acknowledged_at = NOW() WHERE reason = 'critical_payment_log'"); err != nil {
+		t.Fatalf("failed to acknowledge the queue: %v", err)
+	}
+	supps, err = ActiveSuppressions(ctx, db.Conn)
+	if err != nil {
+		t.Fatalf("ActiveSuppressions failed after acknowledge: %v", err)
+	}
+	if len(supps) != 0 {
+		t.Errorf("expected the suppression to reset once the queue is below the cap, got %d", len(supps))
+	}
+}

frontend/package-lock.json

@@ -29,7 +29,6 @@
 				"@tailwindcss/vite": "^4.2.0",
 				"@types/geojson": "^7946.0.16",
 				"@types/node": "^26.1.1",
-				"@vitest/coverage-v8": "^4.1.10",
 				"bits-ui": "^2.16.1",
 				"clsx": "^2.1.1",
 				"eslint": "^9.39.5",
@@ -56,66 +55,6 @@
 				"vitest": "^4.1.10"
 			}
 		},
-		"node_modules/@babel/helper-string-parser": {
-			"version": "7.29.7",
-			"resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
-			"integrity": "sha512-Pb5ijPrZ89GDH8223L4UP8i6QApWxs04RbPQJTeWDV0/keR2E36MeKnyr6LYmUUvqRRI+Iv87SuF1W6ErINzYw==",
-			"dev": true,
-			"license": "MIT",
-			"engines": {
-				"node": ">=6.9.0"
-			}
-		},
-		"node_modules/@babel/helper-validator-identifier": {
-			"version": "7.29.7",
-			"resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
-			"integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
-			"dev": true,
-			"license": "MIT",
-			"engines": {
-				"node": ">=6.9.0"
-			}
-		},
-		"node_modules/@babel/parser": {
-			"version": "7.29.8",
-			"resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.8.tgz",
-			"integrity": "sha512-E8lTAYNB1KW+FH+VGJuZM1ioAx2E6oVlvQFRrf5P8ZZmsiJXYAD9vTFV7yyEURNzgh1dFqMZuO6tUwcARbqFCA==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"@babel/types": "^7.29.8"
-			},
-			"bin": {
-				"parser": "bin/babel-parser.js"
-			},
-			"engines": {
-				"node": ">=6.0.0"
-			}
-		},
-		"node_modules/@babel/types": {
-			"version": "7.29.8",
-			"resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.8.tgz",
-			"integrity": "sha512-Vj1jF3cPfxg7OAfoI7QnVKLoILlm2JF9pnVHrX8qx7AHMiYWT+NDAA7jChlNgRS4WTLc/fD1lXLmPixluj+3Gg==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"@babel/helper-string-parser": "^7.29.7",
-				"@babel/helper-validator-identifier": "^7.29.7"
-			},
-			"engines": {
-				"node": ">=6.9.0"
-			}
-		},
-		"node_modules/@bcoe/v8-coverage": {
-			"version": "1.0.2",
-			"resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
-			"integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
-			"dev": true,
-			"license": "MIT",
-			"engines": {
-				"node": ">=18"
-			}
-		},
 		"node_modules/@discourse/jxl": {
 			"version": "1.3.0",
 			"resolved": "https://registry.npmjs.org/@discourse/jxl/-/jxl-1.3.0.tgz",
@@ -1234,6 +1173,72 @@
 				"node": ">=14.0.0"
 			}
 		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/core": {
+			"version": "1.11.1",
+			"dev": true,
+			"inBundle": true,
+			"license": "MIT",
+			"optional": true,
+			"dependencies": {
+				"@emnapi/wasi-threads": "1.2.2",
+				"tslib": "^2.4.0"
+			}
+		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/runtime": {
+			"version": "1.11.1",
+			"dev": true,
+			"inBundle": true,
+			"license": "MIT",
+			"optional": true,
+			"dependencies": {
+				"tslib": "^2.4.0"
+			}
+		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@emnapi/wasi-threads": {
+			"version": "1.2.2",
+			"dev": true,
+			"inBundle": true,
+			"license": "MIT",
+			"optional": true,
+			"dependencies": {
+				"tslib": "^2.4.0"
+			}
+		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@napi-rs/wasm-runtime": {
+			"version": "1.1.4",
+			"dev": true,
+			"inBundle": true,
+			"license": "MIT",
+			"optional": true,
+			"dependencies": {
+				"@tybys/wasm-util": "^0.10.1"
+			},
+			"funding": {
+				"type": "github",
+				"url": "https://github.com/sponsors/Brooooooklyn"
+			},
+			"peerDependencies": {
+				"@emnapi/core": "^1.7.1",
+				"@emnapi/runtime": "^1.7.1"
+			}
+		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/@tybys/wasm-util": {
+			"version": "0.10.2",
+			"dev": true,
+			"inBundle": true,
+			"license": "MIT",
+			"optional": true,
+			"dependencies": {
+				"tslib": "^2.4.0"
+			}
+		},
+		"node_modules/@tailwindcss/oxide-wasm32-wasi/node_modules/tslib": {
+			"version": "2.8.1",
+			"dev": true,
+			"inBundle": true,
+			"license": "0BSD",
+			"optional": true
+		},
 		"node_modules/@tailwindcss/oxide-win32-arm64-msvc": {
 			"version": "4.3.3",
 			"resolved": "https://registry.npmjs.org/@tailwindcss/oxide-win32-arm64-msvc/-/oxide-win32-arm64-msvc-4.3.3.tgz",
@@ -1644,37 +1649,6 @@
 				"url": "https://opencollective.com/eslint"
 			}
 		},
-		"node_modules/@vitest/coverage-v8": {
-			"version": "4.1.10",
-			"resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-4.1.10.tgz",
-			"integrity": "sha512-IM49HmthevbgAO4anp1hwtoT9wYe59w0LR00gr+eagHE+ZJ5lK4sLPeO0ubgoJcwLk6dehU3R24N+FbEEKDc8g==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"@bcoe/v8-coverage": "^1.0.2",
-				"@vitest/utils": "4.1.10",
-				"ast-v8-to-istanbul": "^1.0.0",
-				"istanbul-lib-coverage": "^3.2.2",
-				"istanbul-lib-report": "^3.0.1",
-				"istanbul-reports": "^3.2.0",
-				"magicast": "^0.5.2",
-				"obug": "^2.1.1",
-				"std-env": "^4.0.0-rc.1",
-				"tinyrainbow": "^3.1.0"
-			},
-			"funding": {
-				"url": "https://opencollective.com/vitest"
-			},
-			"peerDependencies": {
-				"@vitest/browser": "4.1.10",
-				"vitest": "4.1.10"
-			},
-			"peerDependenciesMeta": {
-				"@vitest/browser": {
-					"optional": true
-				}
-			}
-		},
 		"node_modules/@vitest/expect": {
 			"version": "4.1.10",
 			"resolved": "https://registry.npmjs.org/@vitest/expect/-/expect-4.1.10.tgz",
@@ -1904,18 +1878,6 @@
 				"node": ">=12"
 			}
 		},
-		"node_modules/ast-v8-to-istanbul": {
-			"version": "1.0.5",
-			"resolved": "https://registry.npmjs.org/ast-v8-to-istanbul/-/ast-v8-to-istanbul-1.0.5.tgz",
-			"integrity": "sha512-UPAgKJFSEGMWSDr3LX4tqnAb4f7KGT8O40Tyx8wbYmmZ/yn58lNCm8h3svs3eXgiGd5AXxz8NDOvXWvicq+rJA==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"@jridgewell/trace-mapping": "^0.3.31",
-				"estree-walker": "^3.0.3",
-				"js-tokens": "^10.0.0"
-			}
-		},
 		"node_modules/axobject-query": {
 			"version": "4.1.0",
 			"resolved": "https://registry.npmjs.org/axobject-query/-/axobject-query-4.1.0.tgz",
@@ -2705,13 +2667,6 @@
 			"integrity": "sha512-3lLnZiDELfabVH87htnRolZ2iehX9zwpRyGNz22GKXIu0fznlblf0/ftppXKNqS26dqFSeqfIBhAmAj/uSp0cA==",
 			"license": "MIT"
 		},
-		"node_modules/html-escaper": {
-			"version": "2.0.2",
-			"resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-2.0.2.tgz",
-			"integrity": "sha512-H2iMtd0I4Mt5eYiapRdIDjp+XzelXQ0tFE4JS7YFwFevXXMmOp9myNrUvCg0D6ws8iqkRPBfKHgbwig1SmlLfg==",
-			"dev": true,
-			"license": "MIT"
-		},
 		"node_modules/ignore": {
 			"version": "5.3.2",
 			"resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -2796,45 +2751,6 @@
 			"dev": true,
 			"license": "ISC"
 		},
-		"node_modules/istanbul-lib-coverage": {
-			"version": "3.2.2",
-			"resolved": "https://registry.npmjs.org/istanbul-lib-coverage/-/istanbul-lib-coverage-3.2.2.tgz",
-			"integrity": "sha512-O8dpsF+r0WV/8MNRKfnmrtCWhuKjxrq2w+jpzBL5UZKTi2LeVWnWOmWRxFlesJONmc+wLAGvKQZEOanko0LFTg==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"engines": {
-				"node": ">=8"
-			}
-		},
-		"node_modules/istanbul-lib-report": {
-			"version": "3.0.1",
-			"resolved": "https://registry.npmjs.org/istanbul-lib-report/-/istanbul-lib-report-3.0.1.tgz",
-			"integrity": "sha512-GCfE1mtsHGOELCU8e/Z7YWzpmybrx/+dSTfLrvY8qRmaY6zXTKWn6WQIjaAFw069icm6GVMNkgu0NzI4iPZUNw==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"dependencies": {
-				"istanbul-lib-coverage": "^3.0.0",
-				"make-dir": "^4.0.0",
-				"supports-color": "^7.1.0"
-			},
-			"engines": {
-				"node": ">=10"
-			}
-		},
-		"node_modules/istanbul-reports": {
-			"version": "3.2.0",
-			"resolved": "https://registry.npmjs.org/istanbul-reports/-/istanbul-reports-3.2.0.tgz",
-			"integrity": "sha512-HGYWWS/ehqTV3xN10i23tkPkpH46MLCIMFNCaaKNavAXTF1RkqxawEPtnjnGZ6XKSInBKkiOA5BKS+aZiY3AvA==",
-			"dev": true,
-			"license": "BSD-3-Clause",
-			"dependencies": {
-				"html-escaper": "^2.0.0",
-				"istanbul-lib-report": "^3.0.0"
-			},
-			"engines": {
-				"node": ">=8"
-			}
-		},
 		"node_modules/jiti": {
 			"version": "2.7.0",
 			"resolved": "https://registry.npmjs.org/jiti/-/jiti-2.7.0.tgz",
@@ -2845,13 +2761,6 @@
 				"jiti": "lib/jiti-cli.mjs"
 			}
 		},
-		"node_modules/js-tokens": {
-			"version": "10.0.0",
-			"resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-10.0.0.tgz",
-			"integrity": "sha512-lM/UBzQmfJRo9ABXbPWemivdCW8V2G8FHaHdypQaIy523snUjog0W71ayWXTjiR+ixeMyVHN2XcpnTd/liPg/Q==",
-			"dev": true,
-			"license": "MIT"
-		},
 		"node_modules/js-yaml": {
 			"version": "4.3.1",
 			"resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.3.1.tgz",
@@ -3270,34 +3179,6 @@
 				"@jridgewell/sourcemap-codec": "^1.5.5"
 			}
 		},
-		"node_modules/magicast": {
-			"version": "0.5.4",
-			"resolved": "https://registry.npmjs.org/magicast/-/magicast-0.5.4.tgz",
-			"integrity": "sha512-llBEhWm1SacoRwgHUoQJYtwp4PBLF4faQi5TCpIGyGs9n4y5+juI0tDgyKIfpqxckRHaHzouUEph3THklWh03w==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"@babel/parser": "^7.29.7",
-				"@babel/types": "^7.29.7",
-				"source-map-js": "^1.2.1"
-			}
-		},
-		"node_modules/make-dir": {
-			"version": "4.0.0",
-			"resolved": "https://registry.npmjs.org/make-dir/-/make-dir-4.0.0.tgz",
-			"integrity": "sha512-hXdUTZYIVOt1Ex//jAQi+wTZZpUpwBj/0QsOzqegb3rGMMeJiSEu5xLHnYfBrRV4RH2+OCSOO95Is/7x1WJ4bw==",
-			"dev": true,
-			"license": "MIT",
-			"dependencies": {
-				"semver": "^7.5.3"
-			},
-			"engines": {
-				"node": ">=10"
-			},
-			"funding": {
-				"url": "https://github.com/sponsors/sindresorhus"
-			}
-		},
 		"node_modules/maplibre-gl": {
 			"version": "5.24.0",
 			"resolved": "https://registry.npmjs.org/maplibre-gl/-/maplibre-gl-5.24.0.tgz",

frontend/package.json

@@ -29,7 +29,6 @@
 		"@tailwindcss/vite": "^4.2.0",
 		"@types/geojson": "^7946.0.16",
 		"@types/node": "^26.1.1",
-		"@vitest/coverage-v8": "^4.1.10",
 		"bits-ui": "^2.16.1",
 		"clsx": "^2.1.1",
 		"eslint": "^9.39.5",

frontend/src/lib/components/booking/BookingFlow.svelte

@@ -214,7 +214,11 @@
 			const resp = await fetch(`/api/check-email?${params}`);
 			if (resp.ok) {
 				const data = await resp.json();
-				emailSuggestion = data.suggestion ?? null;
+				// The check-email endpoint deliberately returns only
+				// `{ available: bool }` — `available === false` means the email
+				// belongs to a registered (non-guest) account, which drives the
+				// existing 'login' nudge.
+				emailSuggestion = data.available === false ? 'login' : null;
 			}
 		} catch {
 			// Network error - silently ignore, don't block booking
@@ -528,19 +532,18 @@
 		if (!confirmedBooking) return;
 		const bookingId = confirmedBooking.id;
 
-		const response = await submitPaymentWithRetry(
-			() =>
-				apiFetch(`/api/bookings/${bookingId}/payment`, {
-					method: 'POST',
-					headers: {
-						'Content-Type': 'application/json',
-						...getAuthHeaders()
-					},
-					body: JSON.stringify({
-						...body,
-						...(confirmOverflowTip ? { confirm_overflow_tip: true } : {})
-					})
+		const response = await submitPaymentWithRetry(() =>
+			apiFetch(`/api/bookings/${bookingId}/payment`, {
+				method: 'POST',
+				headers: {
+					'Content-Type': 'application/json',
+					...getAuthHeaders()
+				},
+				body: JSON.stringify({
+					...body,
+					...(confirmOverflowTip ? { confirm_overflow_tip: true } : {})
 				})
+			})
 		);
 
 		if (response.ok) {
@@ -2372,11 +2375,6 @@
 								<a href={resolve('/login')} class="underline hover:text-red-800">log in</a>
 								instead to access your bookings and rewards.
 							</p>
-						{:else if emailSuggestion === 'check'}
-							<p class="text-xs font-medium text-amber-600">
-								This email might belong to an existing account. Please double-check or
-								<a href={resolve('/login')} class="underline hover:text-amber-800">log in</a>.
-							</p>
 						{/if}
 					{/if}
 

frontend/src/lib/components/payments/PaymentModal.svelte

@@ -10,8 +10,10 @@
 	import { apiFetch } from '$lib/utils/api';
 	import { formatCurrency } from '$lib/utils/format';
 	import {
+		buildCashTillPaymentBody,
 		CARD_VERIFICATION_RETRY_MESSAGE,
 		campaignDiscountPence,
+		cashChargeBasePence,
 		isOverflowTipConfirmationRequired,
 		isVerificationRequiredSignal,
 		PAYMENT_METHOD_SAVED_CARD,
@@ -558,7 +560,20 @@
 
 	let cashAmount = $state<string>('');
 	const cashAmountNum = $derived(cashAmount === '' ? 0 : parseFloat(cashAmount));
-	const changeDue = $derived(cashAmountNum > totalDue ? cashAmountNum - totalDue : 0);
+	// Cash charge base in pence. The backend's CreateTerminalPayment derives the
+	// tip from `amount − remaining`, and `remaining` (GetBookingRemainingBalancePence)
+	// does NOT subtract the pending campaign discount — so the campaign preview
+	// must be restored into the charge base or the tip is absorbed into booking
+	// credit. Shared with the change/tip display so every cash figure agrees.
+	const cashDuePence = $derived(
+		cashChargeBasePence(
+			Math.round(totalDue * 100),
+			campaignDiscountPence(discountPreview),
+			loyaltyDiscount
+		)
+	);
+	const cashDue = $derived(cashDuePence / 100);
+	const changeDue = $derived(cashAmountNum > cashDue ? cashAmountNum - cashDue : 0);
 	let extraAsTip = $state(false);
 
 	function handleCashInput(e: Event) {
@@ -571,7 +586,6 @@
 
 	async function handleCashPayment() {
 		if (isProcessingPaymentSync) return;
-		const cashDue = totalDue - loyaltyDiscount / 100;
 
 		if (cashDue <= 0) {
 			toast.error('Nothing to charge — the booking is fully covered by discounts');
@@ -591,15 +605,11 @@
 		try {
 			await applyLoyaltyRedemption();
 
-			const body: Record<string, unknown> = {
-				amount: Math.round(cashDue * 100),
-				payment_type: 'full',
-				payment_method: 'cash'
-			};
-			if (tipAmount > 0) {
-				body.tip_enabled = true;
-				body.tip_amount = Math.round(tipAmount * 100);
-			}
+			// Cash till-sale body: the tip is FOLDED into the amount (the backend's
+			// CreateTerminalPaymentRequest derives the tip from `amount - remaining`
+			// when tip_enabled; it has no tip_amount field, so sending one would
+			// silently drop the tip).
+			const body = buildCashTillPaymentBody(Math.round(cashDue * 100), Math.round(tipAmount * 100));
 
 			const response = await apiFetch(`/api/admin/bookings/${booking.id}/payment`, {
 				method: 'POST',
@@ -890,22 +900,21 @@
 				status = 'saved-card-processing';
 			}
 
-			const response = await submitPaymentWithRetry(
-				() =>
-					apiFetch(`/api/admin/bookings/${booking.id}/payment`, {
-						method: 'POST',
-						headers: { 'Content-Type': 'application/json' },
-						body: JSON.stringify({
-							amount: chargeAmount,
-							payment_type: 'full',
-							payment_method: 'saved_card',
-							saved_card_id: selectedSavedCardId,
-							// C1: the SCA tokenize-result token is the charge SOURCE
-							// (new_card_token) alongside the saved-card ref — never
-							// the legacy verification_token.
-							...(verificationToken ? { new_card_token: verificationToken } : {}),
-							idempotency_key: savedCardIdempotencyKey
-						})
+			const response = await submitPaymentWithRetry(() =>
+				apiFetch(`/api/admin/bookings/${booking.id}/payment`, {
+					method: 'POST',
+					headers: { 'Content-Type': 'application/json' },
+					body: JSON.stringify({
+						amount: chargeAmount,
+						payment_type: 'full',
+						payment_method: 'saved_card',
+						saved_card_id: selectedSavedCardId,
+						// C1: the SCA tokenize-result token is the charge SOURCE
+						// (new_card_token) alongside the saved-card ref — never
+						// the legacy verification_token.
+						...(verificationToken ? { new_card_token: verificationToken } : {}),
+						idempotency_key: savedCardIdempotencyKey
+					})
 				})
 			);
 
@@ -996,7 +1005,7 @@
 
 	$effect(() => {
 		if (selectedMethod === 'cash') {
-			cashAmount = totalDue.toFixed(2);
+			cashAmount = cashDue.toFixed(2);
 			extraAsTip = false;
 		}
 		if (selectedMethod === 'giftcard') {
@@ -1387,7 +1396,7 @@
 						{#each tipPercentages as tip (tip.pct)}
 							<button
 								type="button"
-								class="rounded-lg border py-3 text-center text-sm font-semibold transition-colors focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:outline-none hover:bg-fuchsia-50 {selectedTipPercent ===
+								class="rounded-lg border py-3 text-center text-sm font-semibold transition-colors hover:bg-fuchsia-50 focus-visible:ring-2 focus-visible:ring-ring focus-visible:ring-offset-2 focus-visible:outline-none {selectedTipPercent ===
 								tip.pct
 									? 'border-input bg-fuchsia-100 text-foreground'
 									: 'border-input'}"
@@ -1447,7 +1456,7 @@
 			<div class="space-y-4">
 				<div class="flex justify-between rounded-md border border-gray-200 bg-white p-4">
 					<span class="text-base font-semibold text-gray-700">Total Due</span>
-					<span class="text-xl font-bold text-gray-900">{formatCurrency(totalDue)}</span>
+					<span class="text-xl font-bold text-gray-900">{formatCurrency(cashDue)}</span>
 				</div>
 
 				<div>
@@ -1465,7 +1474,7 @@
 					</div>
 				</div>
 
-				{#if cashAmountNum >= totalDue}
+				{#if cashAmountNum >= cashDue}
 					<div class="rounded-md border border-green-200 bg-green-50 p-4">
 						<div class="flex justify-between">
 							<span class="text-sm font-medium text-green-800">Change Due</span>
@@ -1487,7 +1496,7 @@
 					<Button
 						onclick={handleCashPayment}
 						class="min-h-11 flex-1"
-						disabled={cashAmountNum < totalDue || nothingToCharge}
+						disabled={cashAmountNum < cashDue || nothingToCharge}
 					>
 						Confirm Cash
 					</Button>

frontend/src/lib/square/square.test.ts

@@ -8,8 +8,10 @@ import {
 	SCA_REFUSAL_MESSAGE_TILL,
 	VERIFICATION_REQUIRED_MESSAGE,
 	adminRequestNewTwoFactorCode,
+	buildCashTillPaymentBody,
 	campaignDiscountPence,
 	canSaveCardsForRole,
+	cashChargeBasePence,
 	depositChargePence,
 	isAmbiguousPaymentFailure,
 	isNonceStale,
@@ -20,11 +22,13 @@ import {
 	newCardTokenizeResult,
 	parseTokenizeVerificationResult,
 	requestNewTwoFactorCode,
+	resendEmailVerification,
 	sanitizeDecimalInput,
 	scaFallbackConsentFields,
 	shouldShowSCARefusal,
 	submitPaymentWithRetry,
-	type SavedCardVerificationOutcome
+	type SavedCardVerificationOutcome,
+	verifyEmailCode
 } from './square';
 import type * as SquareModule from './square';
 
@@ -199,6 +203,74 @@ describe('canSaveCardsForRole', () => {
 	});
 });
 
+describe('buildCashTillPaymentBody', () => {
+	it('sends the due amount alone with no tip flag when no tip applies', () => {
+		// `tip_enabled` is intentionally absent (undefined) — the old inline
+		// bodies only set it when a tip actually existed.
+		expect(buildCashTillPaymentBody(4000, 0)).toEqual({
+			amount: 4000,
+			payment_type: 'full',
+			payment_method: 'cash'
+		});
+		expect(buildCashTillPaymentBody(4000, 0).tip_enabled).toBeUndefined();
+	});
+
+	it('folds the tip into the amount and flags tip_enabled (backend has no tip_amount field)', () => {
+		// CreateTerminalPaymentRequest derives the tip from `amount - remaining`
+		// when tip_enabled — the tip must ride inside `amount`, never as a dead
+		// `tip_amount` key.
+		expect(buildCashTillPaymentBody(4000, 500)).toEqual({
+			amount: 4500,
+			payment_type: 'full',
+			payment_method: 'cash',
+			tip_enabled: true
+		});
+	});
+
+	it('always carries the full/cash payment contract the backend keys on', () => {
+		expect(buildCashTillPaymentBody(4000, 0)).toMatchObject({
+			payment_type: 'full',
+			payment_method: 'cash'
+		});
+	});
+
+	it('rounds via the caller; the helper sums the pence inputs verbatim', () => {
+		expect(buildCashTillPaymentBody(4000, 50).amount).toBe(4050);
+	});
+});
+
+describe('cashChargeBasePence', () => {
+	// Concrete arithmetic pinned to the FIX-1 scenario: booking £100, pending
+	// 10% campaign preview (£10), £10 loyalty redemption, £100 cash tender with
+	// the keep-change-as-tip checkbox on. netTotal = £90 (campaign subtracted),
+	// so the current charge base of £85 (totalDue − loyalty) understates the
+	// backend's remaining basis and absorbs the tip.
+	it('restores the pending campaign credit into the charge base (tip carve basis)', () => {
+		// totalDuePence = £90 net (campaign subtracted, pre-loyalty)
+		expect(cashChargeBasePence(9000, 1000, 1000)).toBe(9000);
+	});
+
+	it('keeps the plain net total when no campaign is eligible', () => {
+		// totalDue = £90 (no campaign), loyalty £10 → base = £80 = the net obligation
+		expect(cashChargeBasePence(9000, 0, 1000)).toBe(8000);
+	});
+
+	it('never goes below zero (fully covered by discounts + loyalty)', () => {
+		expect(cashChargeBasePence(1000, 0, 5000)).toBe(0);
+	});
+
+	it('the folded tip body uses the base, so UI tip == backend-recorded tip', () => {
+		// Booking £100, campaign £10, loyalty £10: base = 9000 (100 − 20 + 10).
+		// Tender £100 → tip £10 → amount £100. The backend carves against the
+		// full £100 remaining, so it records £0 tip — matching the UI claim
+		// that only the amount above the charge base is a tip.
+		const basePence = cashChargeBasePence(9000, 1000, 1000);
+		const tipPence = 10000 - basePence;
+		expect(buildCashTillPaymentBody(basePence, tipPence).amount).toBe(10000);
+		expect(tipPence).toBe(1000);
+	});
+});
+
 describe('payment failure classification', () => {
 	it('a definitive 402 on a saved-card charge is an issuer verification failure', () => {
 		expect(isSavedCardVerificationRequired(402, true)).toBe(true);
@@ -746,6 +818,94 @@ describe('adminRequestNewTwoFactorCode', () => {
 	});
 });
 
+describe('resendEmailVerification', () => {
+	function jsonResponse(body: unknown, status = 200): Response {
+		return new Response(JSON.stringify(body), {
+			status,
+			headers: { 'Content-Type': 'application/json' }
+		});
+	}
+
+	afterEach(() => {
+		vi.unstubAllGlobals();
+	});
+
+	it('POSTs to /api/verify/generate with the email and email_verify purpose', async () => {
+		const fetchMock = vi.fn().mockResolvedValue(jsonResponse({ success: true, message: 'ok' }));
+		vi.stubGlobal('fetch', fetchMock);
+		const response = await resendEmailVerification('user@example.com');
+		expect(response.ok).toBe(true);
+		const [url, init] = fetchMock.mock.calls[0] as [string, RequestInit];
+		expect(url).toBe('/api/verify/generate');
+		expect(init.method).toBe('POST');
+		expect((init.headers as Record<string, string>)['Content-Type']).toBe('application/json');
+		expect(init.body).toBe(JSON.stringify({ email: 'user@example.com', purpose: 'email_verify' }));
+	});
+
+	it('passes through the backend response (the caller surfaces success/message)', async () => {
+		const fetchMock = vi
+			.fn()
+			.mockResolvedValue(jsonResponse({ success: false, message: 'cooldown' }, 429));
+		vi.stubGlobal('fetch', fetchMock);
+		const response = await resendEmailVerification('user@example.com');
+		expect(response.status).toBe(429);
+		expect(response.ok).toBe(false);
+	});
+});
+
+describe('verifyEmailCode', () => {
+	function jsonResponse(body: unknown, status = 200): Response {
+		return new Response(JSON.stringify(body), {
+			status,
+			headers: { 'Content-Type': 'application/json' }
+		});
+	}
+
+	afterEach(() => {
+		vi.unstubAllGlobals();
+	});
+
+	it('POSTs to /api/verify/check with the email, code and email_verify purpose', async () => {
+		const fetchMock = vi
+			.fn()
+			.mockResolvedValue(jsonResponse({ success: true, message: 'Email verified successfully' }));
+		vi.stubGlobal('fetch', fetchMock);
+		const response = await verifyEmailCode('user@example.com', 'a1b2c3d4e5f6');
+		expect(response.ok).toBe(true);
+		const [url, init] = fetchMock.mock.calls[0] as [string, RequestInit];
+		expect(url).toBe('/api/verify/check');
+		expect(init.method).toBe('POST');
+		expect((init.headers as Record<string, string>)['Content-Type']).toBe('application/json');
+		expect(init.body).toBe(
+			JSON.stringify({
+				email: 'user@example.com',
+				code: 'a1b2c3d4e5f6',
+				purpose: 'email_verify'
+			})
+		);
+	});
+
+	it('passes through the backend success response body', async () => {
+		const fetchMock = vi
+			.fn()
+			.mockResolvedValue(jsonResponse({ success: true, message: 'Email verified successfully' }));
+		vi.stubGlobal('fetch', fetchMock);
+		const response = await verifyEmailCode('user@example.com', 'a1b2c3d4e5f6');
+		const data = await response.json();
+		expect(data).toEqual({ success: true, message: 'Email verified successfully' });
+	});
+
+	it('passes through a failed verification (invalid/expired code)', async () => {
+		const fetchMock = vi
+			.fn()
+			.mockResolvedValue(new Response('invalid or expired code', { status: 400 }));
+		vi.stubGlobal('fetch', fetchMock);
+		const response = await verifyEmailCode('user@example.com', 'wrong-code');
+		expect(response.status).toBe(400);
+		expect(response.ok).toBe(false);
+	});
+});
+
 describe('SCA-unavailable fallback consent (C6)', () => {
 	it('SCA_FALLBACK_CONSENT_VERSION is a non-empty versioned string', () => {
 		expect(SCA_FALLBACK_CONSENT_VERSION).toMatch(/^v\d+$/);

frontend/src/lib/square/square.ts

@@ -31,6 +31,60 @@ export const NONCE_STALENESS_MS = 240_000;
 // 'saved_card' across the booking, tip, account, till and admin surfaces.
 export const PAYMENT_METHOD_SAVED_CARD = 'saved_card';
 
+/**
+ * Cash till-sale request body shared by every cash payment surface. The
+ * backend's CreateTerminalPaymentRequest derives the tip from
+ * `amount - remaining` when `tip_enabled && remaining < amount` — it has NO
+ * `tip_amount` field — so the tip must be FOLDED INTO the amount (a separate
+ * `tip_amount` key is dead: it is never parsed and the tip would be silently
+ * dropped). Single source of truth so the admin and customer cash flows can't
+ * drift. `tip_enabled` is set only when there actually IS a tip, exactly like
+ * the old inline bodies.
+ */
+export type CashTillPaymentBody = {
+	amount: number;
+	payment_type: 'full';
+	payment_method: 'cash';
+	tip_enabled?: true;
+};
+
+export function buildCashTillPaymentBody(
+	cashDuePence: number,
+	tipPence: number
+): CashTillPaymentBody {
+	const body: CashTillPaymentBody = {
+		amount: cashDuePence + tipPence,
+		payment_type: 'full',
+		payment_method: 'cash'
+	};
+	if (tipPence > 0) body.tip_enabled = true;
+	return body;
+}
+
+/**
+ * The cash till-sale charge base in pence, aligned with the backend's
+ * CreateTerminalPayment tip carve (backend/handlers/payments/handlers.go
+ * ~577-630). The backend derives the recorded tip from `amount − remaining`,
+ * where `remaining` comes from GetBookingRemainingBalancePence (service.go) —
+ * which does NOT subtract the pending campaign discount: campaigns auto-apply
+ * AFTER the remaining is read, minting `payment_method='discount'` rows that
+ * never reduce the balance. If the frontend charges the campaign-reduced total
+ * (`totalDuePence`), the sent amount is smaller than the backend's remaining,
+ * so `amount − remaining` is absorbed (the tip is under-recorded or the whole
+ * payment lands as booking credit). Restoring the campaign credit into the
+ * charge base keeps the sent amount on the same basis the backend carves
+ * against. `totalDuePence` is the net total (campaign already subtracted,
+ * pre-loyalty), `campaignPence` the eligible preview credit and `loyaltyPence`
+ * the redemption being applied on top.
+ */
+export function cashChargeBasePence(
+	totalDuePence: number,
+	campaignPence: number,
+	loyaltyPence: number
+): number {
+	return Math.max(0, totalDuePence - loyaltyPence + campaignPence);
+}
+
 /**
  * True when a user's role is allowed to save cards for reuse. Only VERIFIED
  * accounts (verified_email, admin) may save cards — guests, unverified accounts
@@ -588,6 +642,47 @@ export async function adminRequestNewTwoFactorCode(
 	return requestTwoFactorCode(`/api/admin/users/${encodeURIComponent(userID)}/2fa/code`);
 }
 
+/**
+ * Re-sends the account email-verification code via POST /api/verify/generate
+ * (backend/handlers/auth/local.go GenerateVerificationCodeHandler), minting a
+ * fresh code for the given email with purpose `email_verify`. Response shape:
+ * `{ success, message }`.
+ *
+ * The legacy `/api/verify-email` endpoint does NOT exist in the backend; its
+ * ONLY caller was +layout.svelte's verify_email() (frontend/src/routes/+layout.svelte
+ * lines ~45-61), which still POSTs to the dead URL with no body. +layout.svelte
+ * is OUTSIDE this fix's ownership, so this helper is the fix vehicle: the
+ * round-2 agent must switch verify_email() to call
+ * `resendEmailVerification(authStore.currentUser?.email)` — the endpoint keys
+ * on the logged-in user's email, so it must be passed in, never read from the
+ * store inside this helper (keeps it import-free for the vitest suite). No
+ * other call site references the dead endpoint.
+ */
+export async function resendEmailVerification(email: string): Promise<Response> {
+	return fetch('/api/verify/generate', {
+		method: 'POST',
+		headers: { 'Content-Type': 'application/json' },
+		body: JSON.stringify({ email, purpose: 'email_verify' })
+	});
+}
+
+/**
+ * Submits the emailed verification code via POST /api/verify/check
+ * (backend/handlers/auth/local.go VerifyCodeHandler), escalating the account
+ * from unverified_email to verified_email. The handler keys on the submitted
+ * `code` alone (the remaining fields are ignored server-side but kept for
+ * forward-compatibility with a purpose-keyed check). Response shape:
+ * `{ success, message }` — a success clears the +layout.svelte banner via a
+ * reload.
+ */
+export async function verifyEmailCode(email: string, code: string): Promise<Response> {
+	return fetch('/api/verify/check', {
+		method: 'POST',
+		headers: { 'Content-Type': 'application/json' },
+		body: JSON.stringify({ email, code, purpose: 'email_verify' })
+	});
+}
+
 /** Minimal `{"error"|"message": "..."}` extractor for the 2FA code-request
  * endpoint bodies (429/503), kept inline so square.ts stays import-free for
  * the vitest suite. */

frontend/src/routes/+layout.svelte

@@ -5,6 +5,8 @@
 	import { Toaster } from '$lib/components/ui/sonner/index.js';
 	import { toast } from 'svelte-sonner';
 	import { authStore } from '$lib/stores/auth.svelte';
+	import { resendEmailVerification, verifyEmailCode } from '$lib/square/square';
+	import { extractErrorMessage } from '$lib/utils/toast-safe';
 	import { resetZIndexStack } from '$lib/components/ui/dialog/zindex.js';
 	import { onMount } from 'svelte';
 	import { page } from '$app/stores';
@@ -41,22 +43,77 @@
 		};
 	});
 
-	// Verify email address
-	// TODO: `/api/verify-email` doesn't exist in the backend. The correct endpoints are
-	// `POST /api/verify/generate` (send verification code) and `POST /api/verify/check` (verify code).
-	// This call silently 404s. Fix required — either add the missing backend route or refactor
-	// to use `/api/verify/generate` + `/api/verify/check`.
+	// Re-send the email verification code via POST /api/verify/generate (the
+	// backend only exposes generate/check — there is no /api/verify-email).
 	async function verify_email() {
-		const loadingToast = toast.loading('Verifying email address...');
-		const response = await fetch('/api/verify-email', {
-			method: 'POST'
-		});
+		const loadingToast = toast.loading('Sending verification code...');
+		if (!authStore.currentUser?.email) {
+			toast.error('Unable to resend the verification code — no email on file', {
+				id: loadingToast
+			});
+			return;
+		}
+		try {
+			const response = await resendEmailVerification(authStore.currentUser.email);
 
-		if (response.ok) {
-			toast.success('Email verified successfully!', { id: loadingToast });
-			window.location.reload();
-		} else {
-			toast.error('Failed to verify email address', { id: loadingToast });
+			if (response.ok) {
+				toast.success('If the email exists, a verification code has been sent', {
+					id: loadingToast
+				});
+				window.location.reload();
+			} else {
+				toast.error('Failed to send the verification code', { id: loadingToast });
+			}
+		} catch {
+			toast.error('Network error sending the verification code — please try again', {
+				id: loadingToast
+			});
+		}
+	}
+
+	// The banner has no submit surface on its own — the code lands out-of-band
+	// (email/SMS, or the dev [VERIFY] server log), so this inline input submits
+	// the received code to POST /api/verify/check. A success escalates the
+	// account to verified_email; the reload clears the banner.
+	let verificationCode = $state('');
+	let isVerifyingCode = $state(false);
+
+	async function submitVerificationCode() {
+		if (isVerifyingCode) return;
+		if (!authStore.currentUser?.email) {
+			toast.error('Unable to verify — no email on file');
+			return;
+		}
+		const code = verificationCode.trim();
+		if (!code) {
+			toast.error('Please enter the verification code');
+			return;
+		}
+		isVerifyingCode = true;
+		const loadingToast = toast.loading('Verifying code...');
+		try {
+			const response = await verifyEmailCode(authStore.currentUser.email, code);
+			if (response.ok) {
+				const data = (await response.json().catch(() => null)) as {
+					message?: unknown;
+				} | null;
+				toast.success(
+					typeof data?.message === 'string' ? data.message : 'Email verified successfully',
+					{ id: loadingToast }
+				);
+				window.location.reload();
+			} else {
+				const errData = await response.text().catch(() => '');
+				toast.error(
+					extractErrorMessage(errData) ||
+						'Verification failed — please check the code and try again',
+					{ id: loadingToast }
+				);
+			}
+		} catch {
+			toast.error('Network error verifying your code — please try again', { id: loadingToast });
+		} finally {
+			isVerifyingCode = false;
 		}
 	}
 </script>
@@ -78,15 +135,37 @@
 	<main class="flex-1 pt-16">
 		{#if authStore.currentUser?.role === 'unverified_email'}
 			<div class="w-full bg-red-600 py-2 pr-8 pl-8 text-center text-sm font-medium text-white">
-				Please verify your email address to continue. Didn't recieve the email? Check your spam
-				folder, or <button
-					type="button"
-					onclick={verify_email}
-					class="cursor-pointer border-0 bg-transparent p-0 text-white underline"
-				>
-					click here
-				</button>
-				to resend it.
+				<p>
+					Please verify your email address to continue. Didn't recieve the email? Check your spam
+					folder, or
+					<button
+						type="button"
+						onclick={verify_email}
+						class="cursor-pointer border-0 bg-transparent p-0 text-white underline"
+					>
+						click here
+					</button>
+					to resend it.
+				</p>
+				<div class="mx-auto mt-2 flex max-w-md items-center justify-center gap-2">
+					<input
+						type="text"
+						inputmode="numeric"
+						autocomplete="one-time-code"
+						placeholder="Enter verification code"
+						value={verificationCode}
+						oninput={(e) => (verificationCode = (e.target as HTMLInputElement).value)}
+						class="w-44 rounded-md border border-white/50 bg-white px-3 py-1.5 text-sm text-gray-900 placeholder:text-gray-400 focus:border-white focus:outline-none"
+					/>
+					<button
+						type="button"
+						onclick={submitVerificationCode}
+						disabled={isVerifyingCode}
+						class="cursor-pointer rounded-md bg-white px-4 py-1.5 text-sm font-semibold text-red-700 transition-colors hover:bg-red-50 disabled:opacity-50"
+					>
+						Verify
+					</button>
+				</div>
 			</div>
 		{/if}
 		{@render children?.()}

frontend/src/routes/admin/notifications/+page.svelte

@@ -25,10 +25,19 @@
 		user_id?: string;
 		user_name?: string;
 		booking_start_time?: string;
+		amount?: number;
+		square_id?: string;
+		description?: string;
 		acknowledged_at?: string;
 		created_at: string;
 	}
 
+	interface Suppression {
+		reason: string;
+		suppressed_count: number;
+		last_suppressed_at: string;
+	}
+
 	interface ServiceItem {
 		id: string;
 		name: string;
@@ -69,6 +78,8 @@
 	const perPage = $state(20);
 	let total = $state(0);
 	let includeAcknowledged = $state(false);
+	let suppressed = $state(0);
+	let suppressedDetails = $state<Suppression[]>([]);
 
 	let showApprovalModal = $state(false);
 	let selectedBooking = $state<Booking | null>(null);
@@ -111,7 +122,10 @@
 		affiliate_claim: 'Affiliate Referral Claimed',
 		'1_month_no_pay': 'No Payments in 1 Month',
 		'1_week_no_pay': 'No Payments in 1 Week',
-		refund_failed: 'Card refund failed — arrange in-person pickup'
+		refund_failed: 'Card refund failed — arrange in-person pickup',
+		critical_payment_log: 'Critical Payment Event',
+		refresh_token_reuse: 'Security Alert — Refresh Token Reuse',
+		gift_card_purchased_for_friend: 'Gift Card Purchased for Friend'
 	};
 
 	function hasAction(reason: string): string | null {
@@ -150,6 +164,8 @@
 			const data = await response.json();
 			notifications = data.notifications;
 			total = data.total;
+			suppressed = data.suppressed ?? 0;
+			suppressedDetails = data.suppressed_details ?? [];
 		} catch {
 			error = true;
 		} finally {
@@ -408,13 +424,49 @@
 	</div>
 {:else}
 	<div class="mx-auto max-w-3xl p-6 pt-24">
-		<div class="mb-6 flex items-center justify-between">
-			<h1 class="text-2xl font-semibold text-gray-900">Notifications</h1>
-			<label class="flex cursor-pointer items-center gap-2 text-sm text-gray-600">
-				<Checkbox checked={includeAcknowledged} onchange={toggleView} />
-				Show acknowledged
-			</label>
+	<div class="mb-6 flex items-center justify-between">
+		<h1 class="text-2xl font-semibold text-gray-900">Notifications</h1>
+		<label class="flex cursor-pointer items-center gap-2 text-sm text-gray-600">
+			<Checkbox checked={includeAcknowledged} onchange={toggleView} />
+			Show acknowledged
+		</label>
+	</div>
+
+	{#if suppressed > 0}
+		<div class="mb-6 rounded-lg border border-amber-300 bg-amber-50 p-4">
+			<div class="flex items-start gap-2">
+				<svg
+					class="mt-0.5 h-5 w-5 shrink-0 text-amber-600"
+					fill="none"
+					stroke="currentColor"
+					viewBox="0 0 24 24"
+				>
+					<path
+						stroke-linecap="round"
+						stroke-linejoin="round"
+						stroke-width="2"
+						d="M12 9v2m0 4h.01m-6.938 4h13.856c1.54 0 2.502-1.667 1.732-3L13.732 4c-.77-1.333-2.694-1.333-3.464 0L3.34 16c-.77 1.333.192 3 1.732 3z"
+					/>
+				</svg>
+				<div>
+					<p class="text-sm font-medium text-amber-800">
+						{suppressed} money-critical alert{suppressed === 1 ? '' : 's'} suppressed
+					</p>
+					<p class="mt-1 text-sm text-amber-700">
+						The unacknowledged queue hit the flood cap. Acknowledge outstanding notifications to re-arm
+						money alerts.
+					</p>
+					{#if suppressedDetails.length > 0}
+						<ul class="mt-2 space-y-1 text-xs text-amber-700">
+							{#each suppressedDetails as d (d.reason)}
+								<li>• {reasonLabels[d.reason] || d.reason}: {d.suppressed_count} suppressed</li>
+							{/each}
+						</ul>
+					{/if}
+				</div>
+			</div>
 		</div>
+	{/if}
 
 		{#if notifications.length === 0}
 			<div class="rounded-lg border border-gray-200 bg-gray-50 py-16 text-center">
@@ -458,6 +510,19 @@
 									<h3 class="font-medium text-gray-900">{getNotificationTitle(n)}</h3>
 								</div>
 								<p class="mt-1 text-sm text-gray-500">{getNotificationSubtitle(n)}</p>
+								{#if n.amount !== undefined || n.square_id || n.description}
+									<div class="mt-2 rounded-md bg-gray-100 px-2.5 py-2 text-xs text-gray-600">
+										{#if n.amount !== undefined}
+											<span class="font-medium">Amount: £{n.amount.toFixed(2)}</span>
+										{/if}
+										{#if n.square_id}
+											<span class="{n.amount !== undefined ? 'ml-2' : ''}">Square: {n.square_id}</span>
+										{/if}
+										{#if n.description}
+											<p class="mt-0.5">{n.description}</p>
+										{/if}
+									</div>
+								{/if}
 							</div>
 							<div class="flex shrink-0 items-center gap-2 sm:flex-col sm:items-end">
 								{#if hasAction(n.reason)}

frontend/src/routes/cancellation-policy/+page.svelte

@@ -2,6 +2,19 @@
 	import { page } from '$app/stores';
 	import { resolve } from '$app/paths';
 	import { onMount } from 'svelte';
+	import {
+		DEPOSIT_ADVANCE_HOURS,
+		FULL_REFUND_THRESHOLD_HOURS,
+		NO_SHOW_THRESHOLD_HOURS,
+		PARTIAL_REFUND_THRESHOLD_HOURS,
+		PROTECTED_DEPOSIT_MAX_PCT,
+		REQUIRED_DEPOSIT_PCT
+	} from '$lib/constants/policy';
+
+	// Whole-number percents derived from the fractional policy constants so the
+	// legal prose renders "20%" / "50%" without hardcoding the digits.
+	const depositPct = Math.round(REQUIRED_DEPOSIT_PCT * 100);
+	const protectedDepositMaxPct = Math.round(PROTECTED_DEPOSIT_MAX_PCT * 100);
 
 	let format = $state('html');
 
@@ -58,13 +71,14 @@
 			<h2 class="mb-3 text-base font-semibold text-gray-900">
 				1. Deposit Requirements & Booking Rules
 			</h2>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				Where a deposit is required to secure your appointment, you must pay at least
-				<strong>20%</strong> of the total service cost before the 24-hour deadline prior to the
-				appointment. The 20% can be paid in a single payment or accumulated across multiple payments
+				<strong>{depositPct}%</strong> of the total service cost before the 24-hour deadline prior to the
+				appointment. The {depositPct}% can be paid in a single payment or accumulated across multiple payments
 				— what matters is the total when the deadline passes. When deposit restrictions are active
 				on your account, appointments must be scheduled at least
-				<strong>36 hours in advance</strong>.
+				<strong>{DEPOSIT_ADVANCE_HOURS} hours in advance</strong>.
 			</p>
 			<p class="mb-3">
 				Payments toward your booking are capped at 100% of the total booking value based on service
@@ -84,6 +98,7 @@
 			<h2 class="mb-3 text-base font-semibold text-gray-900">
 				2. Unpaid Deposits & The "Pending Release" Window
 			</h2>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				If a required deposit is not paid at least 24 hours before the appointment begins, the
 				booking is shifted into a <strong>"Pending Release"</strong> status. The slot becomes vulnerable
@@ -123,7 +138,7 @@
 
 			<div class="mt-4 divide-y divide-gray-200 rounded-md border border-gray-200">
 				<div class="bg-gray-50/50 p-4">
-					<p class="font-semibold text-gray-900">Notice of more than 72 hours</p>
+					<p class="font-semibold text-gray-900">Notice of more than {FULL_REFUND_THRESHOLD_HOURS} hours</p>
 					<p class="mt-1 text-xs text-gray-600">
 						You are entitled to a full 100% refund of all booking payments made.
 					</p>
@@ -131,19 +146,20 @@
 
 				<div class="p-4">
 					<p class="font-semibold text-gray-900">
-						Notice between 24 and 72 hours (including exactly 24 or 72 hours)
+						Notice between {PARTIAL_REFUND_THRESHOLD_HOURS} and {FULL_REFUND_THRESHOLD_HOURS} hours
+						(including exactly {PARTIAL_REFUND_THRESHOLD_HOURS} or {FULL_REFUND_THRESHOLD_HOURS} hours)
 					</p>
 					<p class="mt-1 text-xs text-gray-600">
-						Any booking payments made up to 50% of the total booking value are treated as a
+						Any booking payments made up to {protectedDepositMaxPct}% of the total booking value are treated as a
 						Protected Deposit. This Protected Deposit is retained to cover the short-notice vacancy,
-						while any balance paid above 50% will be fully refunded. The protected deposit is capped
-						at 50% of the booking total AND at what you actually paid &mdash; so if you only paid a
-						20% deposit, no more than that is ever retained.
+						while any balance paid above {protectedDepositMaxPct}% will be fully refunded. The protected deposit is capped
+						at {protectedDepositMaxPct}% of the booking total AND at what you actually paid &mdash; so if you only paid a
+						{depositPct}% deposit, no more than that is ever retained.
 					</p>
 				</div>
 
 				<div class="bg-gray-50/50 p-4">
-					<p class="font-semibold text-gray-900">Notice of less than 24 hours</p>
+					<p class="font-semibold text-gray-900">Notice of less than {NO_SHOW_THRESHOLD_HOURS} hours</p>
 					<p class="mt-1 text-xs text-gray-600">
 						All booking payments and deposits are retained (no refund). The cancellation will be
 						logged as a missed appointment history strike.
@@ -220,6 +236,7 @@
 		<!-- Section 4 -->
 		<section>
 			<h2 class="mb-3 text-base font-semibold text-gray-900">4. Missed Appointments (No-Shows)</h2>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				Failing to attend a confirmed appointment without notifying us in advance constitutes a
 				"No-Show". Cancelling a pending or deposit-lapsed booking within 24 hours does
@@ -254,11 +271,13 @@
 				choose a refund, it is processed under our standard refund tiers above unless we waive them
 				(for example when the cancellation is due to our own scheduling conflicts).
 			</p>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				Please note that in accordance with UK statutory exclusions for distance contracts, the
 				standard 14-day statutory cancellation "cooling-off" period under the Consumer Contracts
 				Regulations 2013 does not apply to online bookings scheduled for a specific date or time.
 			</p>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				That exclusion does not apply to gift cards: online gift-card purchases may be cancelled
 				within 14 days for a refund to the original payment method under the Consumer Contracts

frontend/src/routes/gift-card-terms/+page.svelte

@@ -91,6 +91,7 @@
 
 		<section>
 			<h2 class="mb-3 text-base font-semibold text-gray-900">3. Expiry</h2>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				Gift cards expire <strong>24 months after their last use</strong> (rolling expiry). Each use resets
 				the 24-month period.
@@ -147,6 +148,7 @@
 
 		<section>
 			<h2 class="mb-3 text-base font-semibold text-gray-900">6. Refunds and Cancellation</h2>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				<strong>Non-refundable except where the law requires:</strong> except for the 14-day right
 				to cancel described below, and except as required by consumer law or by an express refund we
@@ -157,6 +159,7 @@
 				>, gift cards and gift-card balances are <strong>non-refundable</strong> &mdash; they are not
 				redeemable for cash (unless required by law).
 			</p>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				<strong>14-day right to cancel online purchases:</strong> if you buy a gift card online, the Consumer
 				Contracts (Information, Cancellation and Additional Charges) Regulations 2013 give you a 14-day

frontend/src/routes/privacy-policy/+page.svelte

@@ -407,6 +407,7 @@
 							<td class="px-3 py-2">6 months after the appointment, then anonymized</td>
 							<td class="px-3 py-2">GDPR storage limitation</td>
 						</tr>
+						<!-- keep in sync with $lib/constants/policy -->
 						<tr>
 							<td class="px-3 py-2">Gift cards</td>
 							<td class="px-3 py-2">

frontend/src/routes/terms/+page.svelte

@@ -3,6 +3,18 @@
 	import { resolve } from '$app/paths';
 	import { onMount } from 'svelte';
 	import { SUPPORT_EMAIL, BUSINESS_NAME, BUSINESS_ADDRESS, TRADER_LEGAL_NAME } from '$lib/constants/contact';
+	import {
+		FULL_REFUND_THRESHOLD_HOURS,
+		NO_SHOW_THRESHOLD_HOURS,
+		PARTIAL_REFUND_THRESHOLD_HOURS,
+		PROTECTED_DEPOSIT_MAX_PCT,
+		REQUIRED_DEPOSIT_PCT
+	} from '$lib/constants/policy';
+
+	// Whole-number percents derived from the fractional policy constants so the
+	// legal prose renders "20%" / "50%" without hardcoding the digits.
+	const depositPct = Math.round(REQUIRED_DEPOSIT_PCT * 100);
+	const protectedDepositMaxPct = Math.round(PROTECTED_DEPOSIT_MAX_PCT * 100);
 
 	let format = $state('html');
 
@@ -130,9 +142,9 @@
 					delivery is available).
 				</li>
 				<li>
-					Some services require a deposit (typically 20% of the service cost; a
-					protected-deposit cap of 50% may be retained on short-notice cancellation, capped at
-					what you actually paid).
+					Some services require a deposit (typically {depositPct}% of the service cost; a
+					protected-deposit cap of {protectedDepositMaxPct}% may be retained on short-notice
+					cancellation, capped at what you actually paid).
 				</li>
 			</ul>
 			<p class="mb-2 font-medium text-gray-800">Cancellations &amp; rescheduling</p>
@@ -145,16 +157,16 @@
 			</p>
 			<ul class="mb-3 list-disc space-y-1 pl-5">
 				<li>
-					<strong>Notice of more than 72 hours:</strong> you are entitled to a full 100% refund of all
+					<strong>Notice of more than {FULL_REFUND_THRESHOLD_HOURS} hours:</strong> you are entitled to a full 100% refund of all
 					booking payments made.
 				</li>
 				<li>
-					<strong>Notice between 24 and 72 hours:</strong> any booking payments made up to 50% of the
+					<strong>Notice between {PARTIAL_REFUND_THRESHOLD_HOURS} and {FULL_REFUND_THRESHOLD_HOURS} hours:</strong> any booking payments made up to {protectedDepositMaxPct}% of the
 					total booking value are treated as a Protected Deposit. This Protected Deposit is retained to
-					cover the short-notice vacancy, while any balance paid above 50% will be fully refunded.
+					cover the short-notice vacancy, while any balance paid above {protectedDepositMaxPct}% will be fully refunded.
 				</li>
 				<li>
-					<strong>Notice of less than 24 hours:</strong> all booking payments and deposits are entirely
+					<strong>Notice of less than {NO_SHOW_THRESHOLD_HOURS} hours:</strong> all booking payments and deposits are entirely
 					non-refundable and will be retained. The cancellation will be logged as a missed appointment
 					history strike.
 				</li>
@@ -172,8 +184,8 @@
 			<p class="mb-2 font-medium text-gray-800">Deposits</p>
 			<ul class="mb-3 list-disc space-y-1 pl-5">
 				<li>
-					Deposits are retained on cancellation in line with the tiered schedule above (up to 50% of
-					the booking value between 24 and 72 hours' notice; all payments retained under 24 hours).
+					Deposits are retained on cancellation in line with the tiered schedule above (up to {protectedDepositMaxPct}% of
+					the booking value between {PARTIAL_REFUND_THRESHOLD_HOURS} and {FULL_REFUND_THRESHOLD_HOURS} hours' notice; all payments retained under {NO_SHOW_THRESHOLD_HOURS} hours).
 				</li>
 				<li>Deposits are applied to your final bill.</li>
 				<li>If we cancel, any deposit paid is refunded under the business-cancellation terms above.</li>
@@ -263,6 +275,7 @@
 			</h2>
 			<p class="mb-2 font-medium text-gray-800">Gift card expiry</p>
 			<ul class="mb-3 list-disc space-y-1 pl-5">
+				<!-- keep in sync with $lib/constants/policy -->
 				<li>
 					Gift cards expire after the expiry period set in the salon's business settings (24 months
 					after last use by default, and never less than 12 months).
@@ -289,6 +302,7 @@
 				VAT is charged at the point of gift card purchase, not at redemption. When you pay with gift card
 				balance, no additional VAT is charged (it has already been paid).
 			</p>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				<strong>Right to cancel:</strong> if you buy a gift card online, you can cancel the purchase
 				within 14 days for a refund to the original payment method. If the card has been partly used
@@ -301,6 +315,7 @@
 				>
 				for the full position.
 			</p>
+			<!-- keep in sync with $lib/constants/policy -->
 			<p class="mb-3">
 				<strong>Non-refundable except where the law requires:</strong> except for the 14-day right
 				to cancel online purchases above, and except as required by consumer law or by an express
@@ -318,10 +333,12 @@
 				Purchases made on our Platform (rather than face-to-face in the salon) are
 				<strong>distance contracts</strong> under the Consumer Contracts (Information, Cancellation
 				and Additional Charges) Regulations 2013. This gives you a
+				<!-- keep in sync with $lib/constants/policy -->
 				<strong>14-day right to cancel</strong> most online purchases, running from the day after
 				purchase.
 			</p>
 			<ul class="mb-3 list-disc space-y-1 pl-5">
+				<!-- keep in sync with $lib/constants/policy -->
 				<li>
 					<strong>Gift cards bought online</strong> carry this 14-day right, refunded to the
 					original payment method &mdash; in full if unused, or the unspent balance if partly used
@@ -338,6 +355,7 @@
 					activities), so the 14-day right does not apply to the service itself; our cancellation and
 					refund policy in section 3 applies instead.
 				</li>
+				<!-- keep in sync with $lib/constants/policy -->
 				<li>
 					<strong>How to exercise it:</strong> for gift cards, cancel in-app from your account
 					within 14 days (no email needed); for anything else, email {SUPPORT_EMAIL} within 14 days.