0.6.2 2026-07-09

goconst lint clean. Collapsed ~10 repeated string-literal warnings (Datastar signal keys suggestions / suggestErr / suggestPending and the buy milk test fixture) into shared package-level constants so the jetstream CI matrix finishes green. Two tiny files added: features/todo/handlers/signal_keys.go (production) and features/todo/signal_keys_test.go (test fixture). No behavior change.