panel-redesign: Overview, Health, Account and Server > Settings on the kit

Stage 2, step 2. Written by Sonnet, reviewed by Opus.

  - Four pages named after their mockups: overview, health, account,
    settings, each with a typed page struct (view/overview.go, health.go,
    account.go), a fixture and tests. The engine page "status" is gone
    (status.html, status_body.html deleted); "settings" is Server >
    Settings only. status and settings are off legacy_pages.txt.
  - Overview: the stamp and its sentence are derived from the six cards
    (the worst card sets the level and the lead names the cards that are
    not fine); the outbound and inbound domain tables are built from the
    existing service calls. Without the inbound relay the outbound box
    takes the full width.
  - Both pages refresh themselves as the old Status page did. Health
    polls its first row of boxes and swaps the second out of band.
    Overview polls its Server health box and the page head follows out of
    band (GET /overview/fragment), so stamp, sentence and time move with
    the cards.
  - Kit, attributes only (no class, no CSS, markup unchanged when empty):
    Box.Poll and Head.ID / Head.OOB.
  - healthCards: the Queue card says "Empty" / "N queued" instead of
    postqueue's line, which was clipped in a card; Processes and Milter
    sockets carry a sub line. OverallStatus / OverallHeading are gone.
  - Handlers pass typed data; routes, POST targets, field names,
    validation and authorization are unchanged.

States the mockups do not draw, all from existing partials: errors and
successes as the kit flash above the boxes; Health with an unreadable
process list, a certificate without facts, a missing host name; Account
with the report authorization not published / not found / not checked
and with hosted reports off; empty domain tables as empty_state.

Differences from the mockups, for the owner:
  - Overview title is one of "Everything is running normally." /
    "Running, with warnings." / "A component needs attention.", not
    "Mail is flowing..." (the checks do not prove that); the note says
    "Updated HH:MM:SS UTC" without an interval, Health's lead says
    "Refreshes automatically" (panel.js polls at 5 s active, 30 s idle);
  - one Queue card ("outbound"), two milter sockets: what this build has;
  - the days column is the stats window, min(30, retention);
  - Health: no "check port 80" paragraph (the certificate's own detail
    says what to check); a failing socket shows its detail under the path;
    figures come from the sampler ("12%", "MiB");
  - Account: the DMARC form keeps the address field for "Another
    address" (hidden unless chosen); the count "N of M now" is the
    domains following this user's default;
  - Settings: Level 2 links the domain list only;
  - /help#checks and /help#dmarc open Help at the top until the Help step.

Evidence
  - docs/assets/panel-redesign/evidence/overview.png, health.png,
    account.png, settings.png: 1440 px wide, full height, headless Edge,
    real templates served locally with their fixtures - NOT from the
    container (no Docker on this machine).
  - panel/audit.js on the four pages at 1440 and 1280: 612 texts
    checked, problems: [].
  - Polling was exercised in a browser against a local fixture server
    with document.hidden overridden (the pane was hidden): one element
    per id after a swap, no leftover hx-swap-oob, about one request per
    5 s. The first request of a visible tab was not observed.
  - go test -count=1 ./internal/web/...
      ok  internal/web
      ok  internal/web/auth
      ok  internal/web/handlers
      ok  internal/web/validate
      ok  internal/web/view

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

internal/web/view/components.go

@@ -168,6 +168,12 @@ type Head struct {
 	Route   Route
 	Note    []string // right-hand note, one line each
 	Actions []Action
+	// ID and OOB make the head replaceable by a polled fragment: ID is the
+	// element's id, and OOB (set on the fragment's copy only, never on the page)
+	// marks it to be swapped into the page by that id. Used by Overview, whose
+	// stamp and sentence follow its cards. Both are attributes, not markup.
+	ID  string
+	OOB bool
 }
 
 // Crumb is one step of a Head's trail; a step without Href is plain text (the
@@ -220,6 +226,10 @@ type Flash struct {
 // the slot at the right of the head (a note, a tag, a link) and Filter takes it
 // instead as a filter form. Help links the section's topic on the Help page.
 // ID is the anchor a side menu points at. Variant is BoxDanger or BoxCredential.
+// Poll, when set, makes the box the element that polls: it is the address of the
+// fragment that answers with the box again (panel.js schedules the next request
+// by the box's ID, which Poll therefore requires). Used by Overview's Server
+// health box. It adds attributes only, no markup.
 type Box struct {
 	No      string
 	Icon    string
@@ -229,6 +239,7 @@ type Box struct {
 	Filter  *Filter
 	Help    *HelpLink
 	Variant string
+	Poll    string
 }
 
 // HelpLink is a Box's link to its Help topic.