panel-redesign: Server > Health; Overview reduced to verdicts; @routes off

Stage 1, step 5 - and the end of stage 1.

  - GET /server/health (+ /fragment) shows every check in full and is the
    home of POST .../recheck and POST .../reload, which now return there.
  - GET /overview (+ /fragment) shows the overall verdict and six cards -
    machine, processes, TLS certificate, queue, milter sockets, reverse DNS -
    each a view.HealthCard (the typed input of the kit's health_card) that
    links to its table on Health. A check that could not run is a warning,
    not "ok".
  - Both pages read healthChecks(), so a card and its table cannot disagree.
    Until stage 2 they share the old status template, switched by a flag.

legacy_pages.txt: @routes removed. TestRoutesFollowNavigation is enforced
from here on: every path of plan section Routes is registered with its
method, no pre-2.0 path is answered, and no template links to a path the
router does not serve.

Not in this step, left for the Overview page of stage 2: the outbound and
inbound domain summaries the mockup shows under the cards.

Tests: the six cards from one reading of the checks (values, levels, links,
and the unverified case); the two modes of the page - Overview without the
tables and actions, Health with them, each polling its own fragment.

go test ./...  green except the two Windows-only failures in internal/domain
and internal/logtail.

Roadmap 15/27.

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

internal/web/view/templates/status_body.html

@@ -1,5 +1,29 @@
 {{define "status_body"}}
+{{if .Overview}}
+{{/* Overview: one verdict per check, each leading to its table on Health. */}}
 <div id="status-body" data-poll aria-live="polite" hx-get="/overview/fragment" hx-trigger="load" hx-swap="outerHTML">
+  <div class="card" id="overall">
+    <h2>Overall <span class="st st-{{.OverallStatus}}">{{.OverallStatus}}</span></h2>
+    <p class="muted">{{.OverallHeading}} <a href="/server/health">All details</a></p>
+  </div>
+  <div class="card" id="verdicts">
+    <h2>Server health</h2>
+    <table>
+      <thead><tr><th>Check</th><th>Verdict</th><th>Detail</th></tr></thead>
+      <tbody>
+        {{range .Cards}}
+        <tr>
+          <td><a href="{{.Href}}">{{.Name}}</a></td>
+          <td><span class="st st-{{if eq .Level "fail"}}error{{else if eq .Level "warn"}}warn{{else}}ok{{end}}">{{.Value}}</span></td>
+          <td class="muted">{{.Sub}}</td>
+        </tr>
+        {{end}}
+      </tbody>
+    </table>
+  </div>
+</div>
+{{else}}
+<div id="status-body" data-poll aria-live="polite" hx-get="/server/health/fragment" hx-trigger="load" hx-swap="outerHTML">
   <div class="card" id="overall">
     <h2>Overall <span class="st st-{{.OverallStatus}}">{{.OverallStatus}}</span></h2>
     <p class="muted">{{.OverallHeading}}</p>
@@ -127,3 +151,4 @@
   </div>
 </div>
 {{end}}
+{{end}}