Backend already exists: server.set-name runs hostnamectl set-hostname and
regenerates the TLS cert with a SAN for the new name. This is a UI step.
Records the hazard that decides the design: renaming changes both the mDNS
.local name and the TLS cert, so a rename mid-flow can drop the user's session
in the middle of onboarding — potentially between seed generation and seed
verification. Placement is therefore a design decision, with three options laid
out (last-before-Done, first, or collect-early-apply-late).
Also flags RFC-1123 slugification (users will type "Dorian's Node"), whether
the rename propagates to the Reticulum display name and mesh surfaces, the
reconnection UX, and whether the step is skippable.
Sequenced after the in-flight regenerate_tls_cert atomicity fix, since renaming
is exactly the path that fix protects.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
