The buildParameters function returns events sorted newest-first
(sortBy created_at, slice(0,100)), and the mjml section is already
labeled 'Latest Activity'. The object keys Popular/HasPopular no
longer reflect the semantics, so rename them to Latest/HasLatest.
Resolve 21 pre-existing @typescript-eslint/no-unused-vars errors across
5 files (actions.ts, alert.ts, digest.ts, env.ts, worker/email.ts) that
were blocking the script/checks gate. All removals are unused imports
and unused variable assignments with no runtime impact.