PASS S1 fresh-install rc
PASS S1 created-tui message
PASS S1 new config mode 0600
PASS S1 no tmp leftovers
PASS S2 idempotent rerun
PASS S3 update rc
PASS S3 backup equals pre-merge original
PASS S3 provider intact + keys updated
PASS S4 duplicate-tui refused
PASS S4 file untouched on refusal
PASS S4 refusal reason reported
PASS S5 embedded copy identical
PASS S6 uninstall rc
PASS S6 keys removed, items kept
== 14 passed, 0 failed ==