fix(prometheus, syslog): a target or pattern pauses with a Pause/Resume button, not an "on" tick box in its form (#6419)

Monitors, schedules and maintenance plans already pause with a
Pause/Resume button and say "Paused" where they're listed. Prometheus
targets and syslog patterns only had a tick box inside the edit form,
so a target refused by its endpoint couldn't be stopped from its page.

- Both get a Pause/Resume button (target page and list; patterns list)
  posting to /toggle, recorded in the audit log, and a Paused badge.
- The forms lose the tick box. A new one starts running; an edit keeps
  whether it is paused.
- A target's "off" state is now "paused", in its pages and MCP tools.
  A resumed target reads "not scraped yet" until its next scrape, and its
  counter rates start over.

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

plugins/syslog/templates/syslog/pattern_form.html

@@ -45,12 +45,6 @@
         </select>
         <span class="field-hint">The count is of matches this far back, so an alert on it clears this long after the last one.</span>
       </div>
-      <div class="field">
-        <label class="field-check">
-          <input type="checkbox" name="enabled"{% if v.enabled %} checked{% endif %}>
-          Counted: off keeps the pattern without counting it
-        </label>
-      </div>
     </div>
   </section>
   <div class="page-actions">

plugins/syslog/templates/syslog/patterns.html

@@ -1,7 +1,7 @@
 {# plugins/syslog/templates/syslog/patterns.html — telling phrases counted in
    each source's lines every minute, so an alert rule can watch them (#6001). #}
 {% extends "base.html" %}
-{% from "_macros.html" import crumbs, page_header, empty_state %}
+{% from "_macros.html" import crumbs, page_header, empty_state, status_badge %}
 {% block title %}Patterns — Syslog — Steward{% endblock %}
 {% block breadcrumb %}{{ crumbs([("Syslog", "/plugins/syslog/"), ("Patterns", "")]) }}{% endblock %}
 {% block content %}
@@ -23,7 +23,7 @@
     <tbody>
     {% for p in patterns %}
     <tr>
-      <td>{{ p.name }}{% if not p.enabled %} <span class="field-hint">(off)</span>{% endif %}<div class="field-hint mono">{{ p.metric }}</div></td>
+      <td>{{ p.name }}{% if not p.enabled %} {{ status_badge('paused') }}{% endif %}<div class="field-hint mono">{{ p.metric }}</div></td>
       <td>
         {% if p.phrases %}<span class="mono" title="{{ p.phrases|join('\n') }}">{{ p.phrases[:3]|join(" · ") }}{% if p.phrases|length > 3 %} · +{{ p.phrases|length - 3 }} more{% endif %}</span>{% endif %}
         {% if p.severity %}<div class="field-hint">{{ p.severity }} and worse</div>{% endif %}
@@ -37,7 +37,10 @@
       {% if can_alert %}
       <td style="white-space:nowrap;">
         {% if p.alert_resource %}<a class="btn btn-sm btn-ghost" href="/alerts/rules/new?source_module=syslog&amp;resource_name={{ p.alert_resource|urlencode }}&amp;metric_name={{ p.metric|urlencode }}">Alert on it</a>{% endif %}
-        {% if admin %}<a class="btn btn-sm btn-ghost" href="/plugins/syslog/patterns/{{ p.id }}/edit">Edit</a>{% endif %}
+        {% if admin %}<a class="btn btn-sm btn-ghost" href="/plugins/syslog/patterns/{{ p.id }}/edit">Edit</a>
+        <form method="post" action="/plugins/syslog/patterns/{{ p.id }}/toggle" style="display:inline;margin:0;">{{ csrf_field() }}
+          <button type="submit" class="btn btn-sm btn-ghost">{{ "Pause" if p.enabled else "Resume" }}</button>
+        </form>{% endif %}
       </td>
       {% endif %}
     </tr>