Fold the certificate's order log away

The log of the last issuing run is only of interest when something went
wrong. It is a collapsed section now, open when the last run failed.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AeFqV9dZrK6nipHkPfyM4F

pkgs/router-webui/templates/certificate.html

@@ -37,11 +37,11 @@
   </fieldset>
   <button>Save</button>
 </form>
-<section>
-  <h2>Ordering</h2>
+<details{{if .Failed}} open{{end}}>
+  <summary>Issuing and renewal log{{if .Failed}} (the last run failed){{end}}</summary>
   {{if .Status}}<p class="muted">{{.Status}}</p>{{if .Log}}<pre class="log">{{.Log}}</pre>{{end}}
   {{else}}<p class="muted">Nothing yet. After you save and apply, the router orders the certificate (a minute or two); renewals follow 30 days before it expires and need no restart.</p>{{end}}
-</section>
+</details>
 {{end}}
 </div>
 {{end}}