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/app/(observer)/observer/reports/page.tsx

@@ -35,7 +35,12 @@ import {
   ClipboardList,
   CheckCircle2,
   TrendingUp,
+  GitCompare,
+  UserCheck,
+  Globe,
+  Printer,
 } from 'lucide-react'
+import { Button } from '@/components/ui/button'
 import { formatDateOnly } from '@/lib/utils'
 import {
   ScoreDistributionChart,
@@ -44,6 +49,9 @@ import {
   JurorWorkloadChart,
   ProjectRankingsChart,
   CriteriaScoresChart,
+  CrossRoundComparisonChart,
+  JurorConsistencyChart,
+  DiversityMetricsChart,
 } from '@/components/charts'
 
 function OverviewTab({ selectedRoundId }: { selectedRoundId: string | null }) {
@@ -410,6 +418,121 @@ function AnalyticsTab({ selectedRoundId }: { selectedRoundId: string }) {
   )
 }
 
+function CrossRoundTab() {
+  const { data: programs, isLoading: programsLoading } = trpc.program.list.useQuery({ includeRounds: true })
+
+  const rounds = programs?.flatMap(p =>
+    p.rounds.map(r => ({ id: r.id, name: r.name, programName: `${p.year} Edition` }))
+  ) || []
+
+  const [selectedRoundIds, setSelectedRoundIds] = useState<string[]>([])
+
+  const { data: comparison, isLoading: comparisonLoading } =
+    trpc.analytics.getCrossRoundComparison.useQuery(
+      { roundIds: selectedRoundIds },
+      { enabled: selectedRoundIds.length >= 2 }
+    )
+
+  const toggleRound = (roundId: string) => {
+    setSelectedRoundIds((prev) =>
+      prev.includes(roundId)
+        ? prev.filter((id) => id !== roundId)
+        : [...prev, roundId]
+    )
+  }
+
+  if (programsLoading) return <Skeleton className="h-[400px]" />
+
+  return (
+    <div className="space-y-6">
+      <Card>
+        <CardHeader>
+          <CardTitle>Select Rounds to Compare</CardTitle>
+          <CardDescription>Choose at least 2 rounds</CardDescription>
+        </CardHeader>
+        <CardContent>
+          <div className="flex flex-wrap gap-2">
+            {rounds.map((round) => (
+              <Badge
+                key={round.id}
+                variant={selectedRoundIds.includes(round.id) ? 'default' : 'outline'}
+                className="cursor-pointer text-sm py-1.5 px-3"
+                onClick={() => toggleRound(round.id)}
+              >
+                {round.programName} - {round.name}
+              </Badge>
+            ))}
+          </div>
+          {selectedRoundIds.length < 2 && (
+            <p className="text-sm text-muted-foreground mt-3">
+              Select at least 2 rounds to enable comparison
+            </p>
+          )}
+        </CardContent>
+      </Card>
+
+      {comparisonLoading && selectedRoundIds.length >= 2 && <Skeleton className="h-[350px]" />}
+
+      {comparison && (
+        <CrossRoundComparisonChart data={comparison as Array<{
+          roundId: string; roundName: string; projectCount: number; evaluationCount: number
+          completionRate: number; averageScore: number | null
+          scoreDistribution: { score: number; count: number }[]
+        }>} />
+      )}
+    </div>
+  )
+}
+
+function JurorConsistencyTab({ selectedRoundId }: { selectedRoundId: string }) {
+  const { data: consistency, isLoading } =
+    trpc.analytics.getJurorConsistency.useQuery(
+      { roundId: selectedRoundId },
+      { enabled: !!selectedRoundId }
+    )
+
+  if (isLoading) return <Skeleton className="h-[400px]" />
+
+  if (!consistency) return null
+
+  return (
+    <JurorConsistencyChart
+      data={consistency as {
+        overallAverage: number
+        jurors: Array<{
+          userId: string; name: string; email: string
+          evaluationCount: number; averageScore: number
+          stddev: number; deviationFromOverall: number; isOutlier: boolean
+        }>
+      }}
+    />
+  )
+}
+
+function DiversityTab({ selectedRoundId }: { selectedRoundId: string }) {
+  const { data: diversity, isLoading } =
+    trpc.analytics.getDiversityMetrics.useQuery(
+      { roundId: selectedRoundId },
+      { enabled: !!selectedRoundId }
+    )
+
+  if (isLoading) return <Skeleton className="h-[400px]" />
+
+  if (!diversity) return null
+
+  return (
+    <DiversityMetricsChart
+      data={diversity as {
+        total: number
+        byCountry: { country: string; count: number; percentage: number }[]
+        byCategory: { category: string; count: number; percentage: number }[]
+        byOceanIssue: { issue: string; count: number; percentage: number }[]
+        byTag: { tag: string; count: number; percentage: number }[]
+      }}
+    />
+  )
+}
+
 export default function ObserverReportsPage() {
   const [selectedRoundId, setSelectedRoundId] = useState<string | null>(null)
 
@@ -462,16 +585,38 @@ export default function ObserverReportsPage() {
 
       {/* Tabs */}
       <Tabs defaultValue="overview" className="space-y-6">
-        <TabsList>
-          <TabsTrigger value="overview" className="gap-2">
-            <FileSpreadsheet className="h-4 w-4" />
-            Overview
-          </TabsTrigger>
-          <TabsTrigger value="analytics" className="gap-2" disabled={!selectedRoundId}>
-            <TrendingUp className="h-4 w-4" />
-            Analytics
-          </TabsTrigger>
-        </TabsList>
+        <div className="flex items-center justify-between flex-wrap gap-4">
+          <TabsList>
+            <TabsTrigger value="overview" className="gap-2">
+              <FileSpreadsheet className="h-4 w-4" />
+              Overview
+            </TabsTrigger>
+            <TabsTrigger value="analytics" className="gap-2" disabled={!selectedRoundId}>
+              <TrendingUp className="h-4 w-4" />
+              Analytics
+            </TabsTrigger>
+            <TabsTrigger value="cross-round" className="gap-2">
+              <GitCompare className="h-4 w-4" />
+              Cross-Round
+            </TabsTrigger>
+            <TabsTrigger value="consistency" className="gap-2" disabled={!selectedRoundId}>
+              <UserCheck className="h-4 w-4" />
+              Juror Consistency
+            </TabsTrigger>
+            <TabsTrigger value="diversity" className="gap-2" disabled={!selectedRoundId}>
+              <Globe className="h-4 w-4" />
+              Diversity
+            </TabsTrigger>
+          </TabsList>
+          <Button
+            variant="outline"
+            size="sm"
+            onClick={() => window.print()}
+          >
+            <Printer className="mr-2 h-4 w-4" />
+            Export PDF
+          </Button>
+        </div>
 
         <TabsContent value="overview">
           <OverviewTab selectedRoundId={selectedRoundId} />
@@ -492,6 +637,42 @@ export default function ObserverReportsPage() {
             </Card>
           )}
         </TabsContent>
+
+        <TabsContent value="cross-round">
+          <CrossRoundTab />
+        </TabsContent>
+
+        <TabsContent value="consistency">
+          {selectedRoundId ? (
+            <JurorConsistencyTab selectedRoundId={selectedRoundId} />
+          ) : (
+            <Card>
+              <CardContent className="flex flex-col items-center justify-center py-12 text-center">
+                <UserCheck className="h-12 w-12 text-muted-foreground/50" />
+                <p className="mt-2 font-medium">Select a round</p>
+                <p className="text-sm text-muted-foreground">
+                  Choose a round above to view juror consistency metrics
+                </p>
+              </CardContent>
+            </Card>
+          )}
+        </TabsContent>
+
+        <TabsContent value="diversity">
+          {selectedRoundId ? (
+            <DiversityTab selectedRoundId={selectedRoundId} />
+          ) : (
+            <Card>
+              <CardContent className="flex flex-col items-center justify-center py-12 text-center">
+                <Globe className="h-12 w-12 text-muted-foreground/50" />
+                <p className="mt-2 font-medium">Select a round</p>
+                <p className="text-sm text-muted-foreground">
+                  Choose a round above to view diversity metrics
+                </p>
+              </CardContent>
+            </Card>
+          )}
+        </TabsContent>
       </Tabs>
     </div>
   )