* Add - Custom Flat Rate Boxes/Envelopes with adjustable dimensions to account for bulging allowed by USPS.
* Fix - Inaccurate International First-Class Mail letter rates.
* Fix - Add missing Weight based shipping support to First-Class.
* Fix - Filter out Cubic pricing rates and improve flat rate filtering.
* Fix - Make fractional item quantity rates calculations more accurate.
* Tweak - WooCommerce 10.5 compatibility.
* Add - USPS First-Class Mail Rates support to REST API.
* Add - "Display Delivery Times" setting to toggle estimated delivery times on shipping rates.
* Fix - Compatibility issues with Product decimal quantities.
* Add - USPS API migration notices to inform merchants about upcoming API changes and ensure smooth transition.
* Fix - Stop requiring postal codes for countries that do not require them.
* Fix - Missing Non-flat international shipping rates.
* Fix - Flat Rate Box rates not displaying.
* Fix - Allow negative values in adjustment percentage fields for USPS shipping settings.
* Fix - Filtered out USPS facility drop off rates in the REST API.
* Tweak - Deprecating `woocommmerce_shipping_usps_tubes_remove_non_standard_fees` filter and replace it with `woocommerce_shipping_usps_tubes_remove_non_standard_fees`.
* Tweak - Deprecating `woocommmerce_shipping_usps_custom_service_rate_name` filter and replace it with `woocommerce_shipping_usps_custom_service_rate_name`.
* Fix - More reliable product dimension/weight handling, including sane defaults when data is missing.
* Fix - REST flat‑rate prices corrected to avoid doubled totals and align with legacy pricing.
* Fix - REST API expired token.
* Tweak - WooCommerce 10.3 compatibility.