feat(auth): auto-migrate legacy credentials.enc to per-account format#239

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jpoehnelt wants to merge 3 commits intomainfrom

fix/legacy-credential-migration

Commits on Mar 6, 2026

feat(auth): auto-migrate legacy credentials.enc to per-account format
jpoehnelt-bot
committed
refactor: use AtomicBool+Mutex for migration guard, handle Windows backup
jpoehnelt-bot
committed
fix: safe JSON field access and async file I/O for migration
jpoehnelt-bot
committed