Implement 15 platform features: digest, availability, templates, comparison, live voting SSE, file versioning, mentorship, messaging, analytics, drafts, webhooks, peer review, audit enhancements, i18n

Features implemented:
- F1: Email digest notifications with cron endpoint and per-user frequency
- F2: Jury availability windows and workload preferences in smart assignment
- F3: Round templates with save-from-round and CRUD management
- F4: Side-by-side project comparison view for jury members
- F5: Real-time voting dashboard with Server-Sent Events (SSE)
- F6: Live voting UX: QR codes, audience voting, tie-breaking, score animations
- F7: File versioning, inline preview, bulk download with presigned URLs
- F8: Mentor dashboard: milestones, private notes, activity tracking
- F9: Communication hub with broadcasts, templates, and recipient targeting
- F10: Advanced analytics: cross-round comparison, juror consistency, diversity metrics, PDF export
- F11: Applicant draft saving with magic link resume and cron cleanup
- F12: Webhook integration layer with HMAC signing, retry, and delivery logs
- F13: Peer review discussions with anonymized scores and threaded comments
- F14: Audit log enhancements: before/after diffs, session grouping, anomaly detection, retention
- F15: i18n foundation with next-intl (EN/FR), cookie-based locale, language switcher

Schema: 12 new models, field additions to User, Project, ProjectFile, LiveVotingSession, LiveVote, MentorAssignment, AuditLog, Program
New routers: roundTemplate, message, webhook (registered in _app.ts)
New services: email-digest, webhook-dispatcher
New cron endpoints: /api/cron/digest, /api/cron/draft-cleanup, /api/cron/audit-cleanup
New API routes: /api/live-voting/stream (SSE), /api/files/bulk-download

All features are admin-configurable via SystemSettings or per-model settingsJson fields.
Docker build verified successfully.

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

src/components/layouts/admin-sidebar.tsx

@@ -32,6 +32,8 @@ import {
   History,
   Trophy,
   User,
+  LayoutTemplate,
+  MessageSquare,
 } from 'lucide-react'
 import { getInitials } from '@/lib/utils'
 import { Logo } from '@/components/shared/logo'
@@ -60,6 +62,11 @@ const navigation = [
     href: '/admin/rounds' as const,
     icon: CircleDot,
   },
+  {
+    name: 'Templates',
+    href: '/admin/round-templates' as const,
+    icon: LayoutTemplate,
+  },
   {
     name: 'Awards',
     href: '/admin/awards' as const,
@@ -85,6 +92,11 @@ const navigation = [
     href: '/admin/learning' as const,
     icon: BookOpen,
   },
+  {
+    name: 'Messages',
+    href: '/admin/messages' as const,
+    icon: MessageSquare,
+  },
   {
     name: 'Partners',
     href: '/admin/partners' as const,