Function view_only_fund_market_label 

pub fn view_only_fund_market_label(trd_market: i32) -> Option<&'static str>

Label for fund markets that are view-only on active write/calculation paths.

This intentionally covers two namespaces:

• backend raw Account.market values cached in CachedTrdAcc.trd_market;
• canonical OpenAPI Trd_Common.TrdMarket fund values.

None means the market is not a fund/view-only market. Do not use this as a generic display label; use trd_market_label for ordinary surface labels.