feat(ui): jobs view stub + sidebar entry

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

public/views/jobs.js

@@ -0,0 +1,29 @@
+// A7 stub — full panel ships in D5.
+import { api } from '../api.js';
+import { el, mount } from '../dom.js';
+
+function row(j) {
+  return el('li', {},
+    el('span', { class: 'status idle' }, j.state),
+    ' ',
+    el('span', { style: { fontFamily: 'var(--font-mono)' } }, j.name),
+    ' ',
+    el('span', { class: 'muted' }, (j.id || '').slice(0, 8))
+  );
+}
+
+export async function render(main) {
+  const wrap = el('div');
+  mount(main,
+    el('h1', { class: 'view-h1' }, 'Jobs'),
+    el('p', { class: 'view-sub muted' }, 'pg-boss queue — recent jobs across states.'),
+    wrap
+  );
+  try {
+    const rows = await api.get('/api/jobs?limit=50');
+    if (!rows.length) mount(wrap, el('p', { class: 'muted' }, 'No jobs yet.'));
+    else mount(wrap, el('ul', { class: 'plain' }, rows.map(row)));
+  } catch (e) {
+    mount(wrap, el('p', { class: 'muted' }, 'Could not load: ' + e.message));
+  }
+}