- Created src/core/crypto/ with AES-256-GCM encrypt/decrypt (PBKDF2 key derivation)
- Created /api/vault route: CRUD with server-side password encryption
- PATCH /api/vault migration endpoint to re-encrypt legacy plaintext passwords
- Rewrote use-vault hook to use dedicated /api/vault instead of generic storage
- Updated UI: amber 'not encrypted' warning green 'encrypted' badge
- Added ENCRYPTION_SECRET env var to docker-compose.yml and stack.env
- Module version bumped to 0.2.0