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>

tests/test_cron_refresh_button_835.py

@@ -0,0 +1,110 @@
+"""Tests for #835 — refresh button in Tasks / Scheduled Jobs panel."""
+import os
+import re
+
+
+_SRC = os.path.join(os.path.dirname(__file__), "..")
+
+
+def _read(name):
+    return open(os.path.join(_SRC, name), encoding="utf-8").read()
+
+
+class TestCronRefreshButtonHtml:
+    """index.html must expose a refresh button in the Tasks panel header."""
+
+    def test_refresh_button_present(self):
+        html = _read("static/index.html")
+        assert 'id="cronRefreshBtn"' in html, (
+            "Tasks panel must have a #cronRefreshBtn element"
+        )
+
+    def test_refresh_button_has_accessibility_labels(self):
+        """Icon-only buttons need aria-label + title so screen readers and
+        hover tooltips work."""
+        html = _read("static/index.html")
+        m = re.search(r'<button[^>]*id="cronRefreshBtn"[^>]*>', html)
+        assert m, "cronRefreshBtn tag not found"
+        tag = m.group(0)
+        assert 'aria-label=' in tag, (
+            "#cronRefreshBtn is icon-only and must have aria-label"
+        )
+        assert 'title=' in tag, (
+            "#cronRefreshBtn should have a title tooltip"
+        )
+
+    def test_refresh_button_calls_load_crons_with_animate(self):
+        html = _read("static/index.html")
+        m = re.search(r'<button[^>]*id="cronRefreshBtn"[^>]*>', html)
+        assert m
+        tag = m.group(0)
+        assert 'loadCrons(true)' in tag, (
+            "#cronRefreshBtn must call loadCrons(true) to enable the dim-while-fetching animation"
+        )
+
+    def test_refresh_button_sits_next_to_new_job_button(self):
+        """Refresh button should appear in the same header row as the New Job
+        button so the header layout stays tight."""
+        html = _read("static/index.html")
+        ref_pos = html.find('id="cronRefreshBtn"')
+        newjob_pos = html.find('toggleCronForm()')
+        assert ref_pos != -1 and newjob_pos != -1
+        # Must be close enough to be in the same header row (single SVG-inline
+        # button can be around 500 chars by itself due to inline styles/attrs).
+        assert abs(ref_pos - newjob_pos) < 1000, (
+            "Refresh button and New Job button should be in the same header row"
+        )
+
+
+class TestLoadCronsAnimateFlag:
+    """panels.js loadCrons() must accept an optional animate flag that dims
+    the refresh button while fetching."""
+
+    def test_load_crons_accepts_animate_param(self):
+        js = _read("static/panels.js")
+        assert re.search(r'async function loadCrons\s*\(\s*animate\s*\)', js), (
+            "loadCrons must accept an `animate` parameter"
+        )
+
+    def test_load_crons_restores_button_in_finally(self):
+        """The opacity/disabled restore MUST be in a finally block so a
+        throwing fetch doesn't leave the button stuck at 0.5 / disabled."""
+        js = _read("static/panels.js")
+        m = re.search(r'async function loadCrons\(.*?\n\}', js, re.DOTALL)
+        assert m, "loadCrons body not found"
+        fn = m.group(0)
+        assert 'finally' in fn, (
+            "loadCrons must restore the refresh button's opacity/disabled state "
+            "in a finally block so errors during fetch don't leave the button stuck"
+        )
+        # The restore block sets opacity='' (not '1') so CSS cascade wins
+        assert "opacity = ''" in fn or "opacity=''" in fn, (
+            "restore must use opacity='' to clear the inline override"
+        )
+
+
+class TestCronCreatedEventListener:
+    """A global `hermes:cron_created` listener must be registered so
+    future chat paths can trigger the cron list refresh."""
+
+    def test_listener_registered_at_module_scope(self):
+        js = _read("static/panels.js")
+        assert re.search(
+            r"addEventListener\(\s*['\"]hermes:cron_created['\"]",
+            js,
+        ), (
+            "panels.js must register a window-level 'hermes:cron_created' event listener"
+        )
+
+    def test_listener_triggers_load_crons(self):
+        js = _read("static/panels.js")
+        m = re.search(
+            r"addEventListener\(\s*['\"]hermes:cron_created['\"].*?\}\s*\)",
+            js,
+            re.DOTALL,
+        )
+        assert m, "hermes:cron_created listener body not found"
+        body = m.group(0)
+        assert 'loadCrons' in body, (
+            "hermes:cron_created listener must call loadCrons() to refresh the list"
+        )