Selecting a non-base currency now shows a modal explaining the exchange
rate convention, using the actual currency names. Selecting Other shows
a variant asking the user to enter the ISO code first. Both messages
are configurable via fx-rate-message and fx-rate-message-other in
config.yml using {foreign} and {base} placeholders.
The Other option in the currency dropdown no longer shows __OTHER__.
https://claude.ai/code/session_01MbwfxnjLA9KdFTrfzB55HM
