FluentCart Pro v1.6.0

- Adds Subscription engine with store-managed subscription support. - Adds Store-managed renewal orders with payment links for all supported gateways. - Adds Optional automatic renewal charging with saved payment methods on supported gateways (stripe, paypal). - Adds Full subscription lifecycle management, including pause, resume, skip, schedule, amount, status, and billing date controls. - Adds Subscription emails for renewals, reminders, upcoming charges, payment failures, and past-due notices. - Adds Bricks Products controls for empty categories, tags, and category visibility. - Improves Onboarding with clearer step descriptions and a prominent "Generate All Pages" action. - Improves Elementor blocks availability for FluentCart Free as an add-on. - Improves Storefront styling across checkout, customer profile, shop, and product pages. - Improves Admin tables with better column layouts and loading states. - Improves The subscription admin page with richer payment history and renewal details. - Fixes Advanced Variation galleries syncing correctly on single product pages. - Fixes The content editor dialog toolbar and multisite editing issues. - Fixes Email preview and background email rendering. - Fixes Onboarding redirecting to the dashboard after completion. - Fixes File storage connection errors displaying proper error messages. - Fixes Reports page layout on iPad. - Fixes Product variant lists opening without filters. - Fixes Completed subscriptions showing stale next billing dates. - Fixes Bricks Products category filter controls updating dynamically. - Fixes Paddle price/product reuse to sync product/variation custom_data instead of creating duplicate catalog entries.