Add Tier 2 remaining features: publishing pipeline, broadcasts, audit log, drip trigger, today banner; v1.1.25

- CalendarPage: productionStatus field on episodes (idea→recorded→edited→scheduled→published), color dot on chips, dropdown in edit popover; "publishing today" banner with draft announcement button
- EmailPage: Broadcasts drawer (plain-text → Resend Broadcasts API); Audit Log drawer showing activity history; em-status-msg--ok style
- ContactsPage: ▶ Drip button in edit mode syncs contact to Resend audience and triggers drip automation
- server: appendAuditEntry() logged on reply-sent, email-sent, submission-deleted, contacts-merged, contacts-imported, broadcast-sent, drip-triggered; GET /api/admin-audit-log; POST /api/admin-broadcasts/send; POST /api/admin-contacts/trigger-drip; AUDIT_LOG_FILE persisted to data/audit-log.json

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

server.js

@@ -25,6 +25,7 @@ import {
   loadAnalyticsEventsFromDisk,
   loadEmailSettingsFromDisk,
   loadCalendarEventsFromDisk,
+  loadAuditLogFromDisk,
   createBackupSnapshot,
   refreshContentCaches,
   queueHitStatsWrite,
@@ -151,6 +152,7 @@ Promise.all([
   loadAnalyticsEventsFromDisk(),
   loadEmailSettingsFromDisk(),
   loadCalendarEventsFromDisk(),
+  loadAuditLogFromDisk(),
   refreshContentCaches(),
 ])
   .catch(err => {