LoanOffer::new is the only way in: fields are private and the constructor
rejects a negative rate, a zero duration, and a non-positive capital. A zero
rate is accepted on purpose — the PTZ (prêt à taux zéro) is a real French
instrument.
Add thiserror for the typed error, as required for immo-core. Rate and
duration take no upper bound for now.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Store amounts as i64 cents rather than a Decimal, so the "scale is 2"
invariant is structural instead of maintained by hand. Both accessors are
total: as_cents is a field read, as_decimal derives the Decimal on demand.
i64 rather than u64 because differences between amounts can be negative.
Add rust_decimal, verified to build for wasm32-unknown-unknown with default
features. Allow clippy::inconsistent_digit_grouping in immo-core so cent
literals can be grouped as euros-then-cents.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Two-crate workspace: immo-core for pure financial logic (wasm-compatible,
no async/IO deps) and immo-web for HTTP and rendering. Both crates are
still cargo-new skeletons; no domain code yet.
Pins the toolchain to 1.97 with rustfmt, clippy and the
wasm32-unknown-unknown target so the core crate's wasm constraint is
checkable locally. Cargo.lock is committed since the workspace ships a
binary.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
