Global Nail Salon Market Size, Share & Demand Report By Service Type (Manicure, Pedicure, Nail Art & Decoration, Nail Extensions/Enhancements, Specialty & Wellness Treatments), By Business Model (Independent Salons, Chain/Franchise Salons, Nail Bars, Mobile/Home Services), By Price Tier (Luxury/Premium, Mid-Market, Budget/Value), By End User (Women, Men), By Service Delivery Channel (Walk-in/On-demand, Appointment/Digital, Subscription/Membership), By Product Positioning (Mainstream Chemical, Organic/Non-Toxic), By Region & Segment Forecasts, 2025–2030