product_pricelist_fixed_currency_rate

Purpose

Extend product pricelists to let rules based on another currency use a fixed conversion rate instead of the live rate.

Features

product.pricelist.item: allows rules based on another currency pricelist to store a fixed_currency_rate that overrides standard currency conversion when computing prices
res.currency: applies a fixed rate from context during currency conversion so enforced pricelist rates are honored
product.pricelist.item: exposes actual and inverse currency rates with a tooltip when base and target pricelist currencies differ to help compare fixed vs current rates
product.pricelist.item: lets users input the rate in either direction via inverse_fixed_currency_rate and a toggle to flip the conversion direction for cross-currency rules