feat(tasks): refresh button in cron panel + auto-refresh on job creation (closes #835)

* feat(tasks): refresh button in cron panel + hermes:cron_created event

Add a ↺ refresh button to the Scheduled Jobs header so the job list can
be reloaded without a full page refresh. Closes #835.

- static/index.html: ↺ button with cronRefreshBtn id, calls loadCrons(true)
- static/panels.js: loadCrons(animate) dims+disables the button while fetching,
  restores it in finally; hermes:cron_created window event auto-refreshes list
  when the agent creates a job from chat

* test: add regression tests for cron refresh button + event listener

The PR shipped without automated coverage (pure UI wiring).  Filling that
gap with 8 source-level tests:

- Refresh button element exists with aria-label + title (icon-only a11y)
- Button wires onclick to loadCrons(true) for the dim animation
- Button sits in the same header row as "New job"
- loadCrons() now accepts an animate parameter
- loadCrons() restores the button's opacity/disabled in finally (so a
  throwing fetch doesn't leave the button stuck)
- hermes:cron_created window listener is registered at module scope
- Listener calls loadCrons() when dispatched

Also rebased onto master (CHANGELOG conflict resolved — v0.50.143 →
v0.50.142 since master's top is currently v0.50.141).

Full suite: 1750 passed, 0 new failures.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: nesquena-hermes <nesquena-hermes@users.noreply.github.com>
Co-authored-by: Nathan Esquenazi <nesquena@gmail.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

static/panels.js

@@ -19,8 +19,13 @@ async function switchPanel(name) {
 }
 
 // ── Cron panel ──
-async function loadCrons() {
+async function loadCrons(animate) {
   const box = $('cronList');
+  const refreshBtn = $('cronRefreshBtn');
+  if (animate && refreshBtn) {
+    refreshBtn.style.opacity = '0.5';
+    refreshBtn.disabled = true;
+  }
   try {
     const data = await api('/api/crons');
     if (!data.jobs || !data.jobs.length) {
@@ -77,6 +82,12 @@ async function loadCrons() {
       loadCronOutput(job.id);
     }
   } catch(e) { box.innerHTML = `<div style="padding:12px;color:var(--accent);font-size:12px">${esc(t('error_prefix'))}${esc(e.message)}</div>`; }
+  finally {
+    if (animate && refreshBtn) {
+      refreshBtn.style.opacity = '';
+      refreshBtn.disabled = false;
+    }
+  }
 }
 
 let _cronSelectedSkills=[];
@@ -1472,6 +1483,12 @@ let _cronPollSince=Date.now()/1000;  // track from page load
 let _cronPollTimer=null;
 let _cronUnreadCount=0;
 
+// Auto-refresh the cron list when a job is created from chat or any external source.
+// The chat path dispatches this event when the agent response mentions cron creation.
+window.addEventListener('hermes:cron_created', () => {
+  if ($('cronList')) loadCrons();
+});
+
 function startCronPolling(){
   if(_cronPollTimer) return;
   _cronPollTimer=setInterval(async()=>{