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>

server/config.js

@@ -61,6 +61,7 @@ export const ANALYTICS_EVENTS_FILE = path.join(DATA_DIR, 'analytics-events.json'
 export const EMAIL_SETTINGS_FILE = path.join(DATA_DIR, 'email-settings.json')
 export const CALENDAR_EVENTS_FILE = path.join(DATA_DIR, 'calendar-events.json')
 export const AUDIT_LOG_FILE = path.join(DATA_DIR, 'audit-log.json')
+export const WEBHOOKS_FILE = path.join(DATA_DIR, 'webhooks.json')
 export const MAX_EPISODE_SCRIPT_LENGTH = 200_000 // ~150k words, well beyond any sermon
 
 export const DIST_DIR = path.join(ROOT_DIR, 'dist')