Add webhook outbound, Contact→Calendar, checklist automation; v1.1.26

- Webhook CRUD (GET/POST/DELETE /api/admin-webhooks, POST .../test) with
  ⚡ Webhooks drawer in EmailPage; fires contact.new and reply.sent events
- Contact→Calendar: history panel shows checklist episodes within ±30 days
- Checklist automation: saveEdit auto-sets productionStatus (idea→scheduled
  for future dates, idea→published for past); ⚙ Tasks button generates
  Record (−14d) and Edit (−7d) calendar task events for scheduled episodes
- Audit log captures webhook-added, webhook-removed, webhook-test events
- Webhook infrastructure: state, disk persistence, fire-and-forget with
  AbortSignal.timeout(8000), loaded on startup

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/App.css

@@ -11741,3 +11741,23 @@
   .cal-sidebar { display: none; }
   .cal-month-title { min-width: 120px; font-size: 0.95rem; }
 }
+
+/* ── Webhook management UI ──────────────────────────────────────────────── */
+.em-webhook-list { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: 1.2rem; }
+.em-webhook-item { display: flex; align-items: flex-start; justify-content: space-between; gap: 0.75rem; background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08); border-radius: 6px; padding: 0.6rem 0.8rem; }
+.em-webhook-info { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
+.em-webhook-label { font-size: 0.75rem; color: #a0a0b8; font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
+.em-webhook-url { font-size: 0.8rem; color: #c0bcd4; word-break: break-all; }
+.em-webhook-events { font-size: 0.72rem; color: #6b7280; font-family: monospace; }
+.em-webhook-actions { display: flex; align-items: center; gap: 0.4rem; flex-shrink: 0; }
+.em-webhook-test-msg { font-size: 0.75rem; color: #4ade80; white-space: nowrap; }
+.em-webhook-add-form { border-top: 1px solid rgba(255,255,255,0.07); padding-top: 1rem; }
+.em-webhook-add-title { font-size: 0.85rem; font-weight: 600; color: #c0bcd4; margin: 0 0 0.75rem; }
+
+/* ── Calendar flash / task generation ───────────────────────────────────── */
+.cal-flash-msg { font-size: 0.78rem; color: #4ade80; padding: 0.2rem 0.5rem; border-radius: 4px; background: rgba(74,222,128,0.08); border: 1px solid rgba(74,222,128,0.2); }
+
+/* ── Contacts → Calendar context ────────────────────────────────────────── */
+.ct-history-ep-section { margin-top: 0.6rem; border-top: 1px solid rgba(255,255,255,0.07); padding-top: 0.6rem; }
+.ct-history-ep-label { font-size: 0.72rem; color: #6b7280; margin: 0 0 0.4rem; text-transform: uppercase; letter-spacing: 0.04em; }
+.ct-history-item--ep { background: rgba(99,102,241,0.07); border-left: 2px solid #6366f1; }