docs: record v0.4.2 release in handoff

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

docs/session-handoff.md

@@ -16,6 +16,9 @@ original foundational decisions doc (do not overwrite it).
     Caddy on-demand TLS; request-derived Reverb endpoint; anti-lockout middleware).
   - `v0.4.1` — fixed a garbled `<header>` on every signed-in page (Blade raw-block bug → rule
     **R17**); made broadcast channels **private** (metrics no longer public).
+  - `v0.4.2` — Server-Details UX + hardening polish (see §2b): uniform `danger-soft` buttons,
+    installed-only firewall/fail2ban grid, auto-updates as a neutral preference, SSH-verified
+    server creation + `pending` status, SSH key-only hint, and the fail2ban/UFW detection fix.
 - **Dev stack** runs on this VM via `docker compose` (app container IP **172.18.0.6**, host
   `10.10.90.136:80`). Managed fleet host = **10.10.90.162** (Debian / apt / ufw; the only
   live-verified target — dnf/zypper/firewalld command strings are built but not live-tested).
@@ -57,7 +60,7 @@ version bump / CHANGELOG / tag / push — the fix lives on the branch only. The
 
 ## 2b. DONE — Server-Details UX + hardening polish (2026-06-14)
 
-Seven reported issues fixed on `feat/v1-foundation` (committed, **not** tagged/pushed). Spec:
+Seven reported issues fixed on `feat/v1-foundation`, **released as `v0.4.2`** (tagged + pushed). Spec:
 `docs/superpowers/specs/2026-06-14-server-details-hardening-polish-design.md`; plan:
 `docs/superpowers/plans/2026-06-14-server-details-hardening-polish.md`.