Uses assert_cmd + tempfile to spin up a fresh vault per test.
Covers init layout, add/list/get mask semantics, rm/restore/purge cycle,
and generate smoke. Adds RELICARIO_TEST_PASSPHRASE env-var hatch in
unlock_interactive and cmd_init so tests don't need a TTY.
Also fixes read_params in session.rs to correctly parse the nested
params.json format (kdf sub-object) rather than trying to deserialize
the whole file as KdfParams.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
atomic_write now appends .tmp instead of replacing the extension
(manifest.enc.tmp, not manifest.tmp). image_secret is wrapped in
Zeroizing so both KDF inputs wipe on drop. Caught in Task 4 review.
Provides load/save helpers for Manifest/Settings/Item; atomic_write keeps
vault files consistent across crashes. main.rs is transiently broken
against the old Entry API — Task 5+ rewrites the command handlers.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
