docs: the panel as it is in 2.0

Stage 3, step 3. Written by Sonnet from the code and the plan, checked
by Opus.

  - guide.md: a section on the panel - menu, paths, the roles global and
    domain with outbound and inbound assigned separately -, Overview and
    Health, Queue and System log, Account and Server > Settings, the
    domain page / Domain settings / application form, Help as a page of
    topics. The DMARC report address is one of three choices set in
    Domain settings. The Spam filter box, the two INBOUND_ANTISPAM_*
    variables the panel reads, and the filter's socket on Health.
    Sessions; backup and export encrypted unless the box is unticked;
    1.x data is not restored into 2.0.
  - architecture.md: Panel HTTP surface rewritten from web.go (routes,
    the /server/ guard, per-object checks, <page>/fragment, one layout,
    typed page data, the kit and its guards, CSP and htmx); Persistence
    gains the database - one baseline, a 1.x file refused, the tables as
    they are.
  - security.md: roles and what each reaches, as built; sessions by user
    id and what ends them; state-changing requests; errors shown to
    users; the 2.0 review; two accepted risks from it - a delegated
    inbound upstream may be any host and port, and Account's profile is
    saved without the password.
  - CHANGELOG: Removed opens with "2.0 starts from an empty data
    directory"; entries that describe the user-default report address
    say they were replaced before release; the filter's socket.
  - roadmap.md: two review follow-up rows struck as retired by the
    redesign (.pair / .split, the two back links); password-reset notes
    that changing the account e-mail must then ask for the password.
    Progress 25/27.
  - development.md: the component kit and its guards; README and
    product.md: wording.

Left as they are
  - The third follow-up row the plan expected to strike - initShowWhen
    is not re-run after an htmx swap - still holds: no polled fragment
    carries such a control today, so nothing breaks, but the redesign did
    not retire it.
  - guide.md embeds no screenshots, so none needed retaking.
  - README and guide still name image 1.9.5 - the version cut.
  - plans/preflight.md and plans/inbound-antispam-panel.md use pre-2.0
    paths; roadmap's template-data-typing is largely done by the
    redesign.

  go test -count=1 ./cmd/panel (env-doc tables): ok

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/plans/panel-redesign.md

@@ -531,7 +531,7 @@ only when both are done. Every stage-2 step ends with the evidence of
 
 - [ ] Technical review of the whole against the mockups, evidence pairs complete — **Opus**
 - [x] Security review of the route rename, subtree authorization and inbound delegation — **Fable**
-- [ ] guide.md screenshots and wording for the new navigation; architecture.md § Panel HTTP surface and § Persistence; security.md roles; *Removed* in the CHANGELOG with one line that 2.0 starts from an empty data directory; strike the three UI rows of review-2026-08-followups that the redesign retires — **Sonnet**
+- [x] guide.md screenshots and wording for the new navigation; architecture.md § Panel HTTP surface and § Persistence; security.md roles; *Removed* in the CHANGELOG with one line that 2.0 starts from an empty data directory; strike the three UI rows of review-2026-08-followups that the redesign retires — **Sonnet**
 - [ ] `go vet`, `go test ./...`, e2e suite; version cut `2.0.0` — **Haiku**
 
 **After 2.0** — features land in the kit, each from its own plan, mockup first