The client compiles with strict: false, so nullable contract fields arrive as
if always present and implicit anys stay invisible. tsconfig.strict.json is the
same program with strictNullChecks and noImplicitAny, and lint:strict
(scripts/strict-lint.mjs) counts its errors per file against
scripts/strict-baseline.json: a file may not gain one, a new file has to be
clean, and an entry above its count fails until --update lowers it. Nothing is
converted here; today's 534 errors in 165 files are frozen. allowJs stays: the
tests import the .mjs scripts and read their JSDoc types through it.
The todo MSW handler maps a cleared priority to its default so the test
helper written in this branch starts at zero. The check runs after the
typecheck in client-quality.
Maurice