Eight proposals from the state of the app after the rework, with reasoning,
and a shorter list of things that look worth changing but are not — the
repetition among the fetch hooks, the two band-builders that share a name but
not a problem, and the propose and apply endpoints that remain the testable
primitives beneath the combined one.
The first entry is the one that matters: a parent with sole custody has no way
to say so, and is quietly told they have half the days they are entitled to.
