saveServer() wrote host/port/encryption without touching any mailbox, so
the console kept showing every mailbox as verified against a server
nothing had tested since. Mirrors EditMailbox::save()'s existing guard on
a single mailbox's own identity, just at server scope: only clears when a
field actually changed, so re-saving unedited values leaves a real
verification alone.
Both places now delegate the actual clear to new Mailbox::
invalidateVerification()/invalidateAllVerifications() methods rather than
touching last_verified_at directly, sharing the mutation. The "did this
change" comparison stays separate in each caller - one diffs a loaded
model's attributes, the other diffs persisted settings against incoming
scalars, and forcing them through one function would add machinery no
actual duplication justifies.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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