fix(web): job log polls while active, one service history limit (#7)

internal/master/web/templates/job.html

@@ -1,12 +1,12 @@
 {{define "content"}}
 <h1>Job #{{.Job.ID}}</h1>
 <p><a href="/services/{{.Job.ServiceID}}">{{.Job.ServiceName}}</a></p>
-<div id="job" hx-get="/fragments/jobs/{{.Job.ID}}" hx-trigger="sse:job-{{.Job.ID}}" hx-swap="innerHTML">
-  {{template "job" .}}
-</div>
+{{template "job" .}}
 {{end}}
 
+{{/* The wrapper is part of the fragment and swapped as outerHTML, so a finished job drops the polling timer. The timer recovers from a dropped SSE signal. */}}
 {{define "job"}}
+<div id="job" hx-get="/fragments/jobs/{{.Job.ID}}" hx-trigger="sse:job-{{.Job.ID}}{{if .Job.Active}}, every 2s{{end}}" hx-swap="outerHTML">
 <table class="details">
   <tr><th>Status</th><td class="status status-job-{{.Job.Status}}">{{.Job.Status}}</td></tr>
   <tr><th>From</th><td><code>{{shortRef .Job.FromRef}}</code></td></tr>
@@ -18,4 +18,5 @@
 {{if .Job.Error}}<p class="error">{{.Job.Error}}</p>{{end}}
 {{if .Job.OutputTruncated}}<p class="muted">Earlier output truncated.</p>{{end}}
 <pre class="log">{{.Job.Output}}</pre>
+</div>
 {{end}}