fix: total_spent counts all non-cancelled bookings, not only checked_out

Previously guests showed 0 ₽ spent when they had confirmed/checked_in
bookings with paid_amount > 0. Now paid_amount is summed for all statuses
except cancelled and no_show.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/src/routes/guests.ts

@@ -18,8 +18,8 @@ const STATS_JOIN = `
     SELECT
       guest_id,
       COUNT(*) FILTER (WHERE status NOT IN ('cancelled', 'no_show')) AS total_stays,
-      COALESCE(SUM(paid_amount) FILTER (WHERE status = 'checked_out'), 0) AS total_spent,
-      MAX(check_out) FILTER (WHERE status = 'checked_out') AS last_visit
+      COALESCE(SUM(paid_amount) FILTER (WHERE status NOT IN ('cancelled', 'no_show')), 0) AS total_spent,
+      MAX(check_out) FILTER (WHERE status NOT IN ('cancelled', 'no_show')) AS last_visit
     FROM bookings
     WHERE hotel_id = $1
     GROUP BY guest_id