COI gate + admin review, mobile file viewer fixes for iOS

- Integrate COI declaration dialog into jury evaluate page (blocks evaluation until declared)
- Add COI review section to admin round page with clear/reassign/note actions
- Fix mobile: remove inline preview (viewport too small), add labeled buttons
- Fix iOS: open-in-new-tab uses synchronous window.open to avoid popup blocker
- Fix iOS: download falls back to direct link if fetch+blob fails (CORS/Safari)

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

src/app/(jury)/jury/competitions/[roundId]/projects/[projectId]/evaluate/page.tsx

@@ -15,7 +15,8 @@ import { RadioGroup, RadioGroupItem } from '@/components/ui/radio-group'
 import { cn } from '@/lib/utils'
 import { MultiWindowDocViewer } from '@/components/jury/multi-window-doc-viewer'
 import { Badge } from '@/components/ui/badge'
-import { ArrowLeft, Save, Send, AlertCircle, ThumbsUp, ThumbsDown, Clock, CheckCircle2 } from 'lucide-react'
+import { COIDeclarationDialog } from '@/components/forms/coi-declaration-dialog'
+import { ArrowLeft, Save, Send, AlertCircle, ThumbsUp, ThumbsDown, Clock, CheckCircle2, ShieldAlert } from 'lucide-react'
 import { toast } from 'sonner'
 import type { EvaluationConfig } from '@/types/competition-configs'
 
@@ -68,6 +69,14 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
     { enabled: !!myAssignment?.id }
   )
 
+  // COI (Conflict of Interest) check
+  const { data: coiStatus, isLoading: coiLoading } = trpc.evaluation.getCOIStatus.useQuery(
+    { assignmentId: myAssignment?.id ?? '' },
+    { enabled: !!myAssignment?.id }
+  )
+  const [coiCompleted, setCOICompleted] = useState(false)
+  const [coiHasConflict, setCOIHasConflict] = useState(false)
+
   // Fetch the active evaluation form for this round
   const { data: activeForm } = trpc.evaluation.getStageForm.useQuery(
     { roundId },
@@ -385,6 +394,13 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
     )
   }
 
+  // COI config
+  const coiRequired = evalConfig?.coiRequired ?? true
+
+  // Determine COI state: declared via server or just completed in this session
+  const coiDeclared = coiCompleted || coiStatus !== undefined
+  const coiConflict = coiHasConflict || (coiStatus?.hasConflict ?? false)
+
   // Check if round is active
   const isRoundActive = round.status === 'ROUND_ACTIVE'
 
@@ -421,6 +437,79 @@ export default function JuryEvaluatePage({ params: paramsPromise }: PageProps) {
     )
   }
 
+  // COI gate: if COI is required, not yet declared, and we have an assignment
+  if (coiRequired && myAssignment && !coiLoading && !coiDeclared) {
+    return (
+      <div className="space-y-6">
+        <div className="flex items-center gap-4">
+          <Button variant="ghost" size="sm" asChild>
+            <Link href={`/jury/competitions/${roundId}/projects/${projectId}` as Route}>
+              <ArrowLeft className="mr-2 h-4 w-4" />
+              Back to Project
+            </Link>
+          </Button>
+          <div>
+            <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+              Evaluate Project
+            </h1>
+            <p className="text-muted-foreground mt-1">{project.title}</p>
+          </div>
+        </div>
+        <COIDeclarationDialog
+          open={true}
+          assignmentId={myAssignment.id}
+          projectTitle={project.title}
+          onComplete={(hasConflict) => {
+            setCOICompleted(true)
+            setCOIHasConflict(hasConflict)
+          }}
+        />
+      </div>
+    )
+  }
+
+  // COI conflict declared — block evaluation
+  if (coiRequired && coiConflict) {
+    return (
+      <div className="space-y-6">
+        <div className="flex items-center gap-4">
+          <Button variant="ghost" size="sm" asChild>
+            <Link href={`/jury/competitions/${roundId}/projects/${projectId}` as Route}>
+              <ArrowLeft className="mr-2 h-4 w-4" />
+              Back to Project
+            </Link>
+          </Button>
+          <div>
+            <h1 className="text-2xl font-bold tracking-tight text-brand-blue dark:text-foreground">
+              Evaluate Project
+            </h1>
+            <p className="text-muted-foreground mt-1">{project.title}</p>
+          </div>
+        </div>
+        <Card className="border-l-4 border-l-amber-500">
+          <CardContent className="flex items-start gap-4 p-6">
+            <div className="rounded-xl bg-amber-50 dark:bg-amber-950/40 p-3">
+              <ShieldAlert className="h-6 w-6 text-amber-600" />
+            </div>
+            <div>
+              <h2 className="text-lg font-semibold">Conflict of Interest Declared</h2>
+              <p className="text-sm text-muted-foreground mt-1">
+                You declared a conflict of interest for this project. An administrator will
+                review your declaration. You cannot evaluate this project while the conflict
+                is under review.
+              </p>
+              <Button variant="outline" size="sm" className="mt-4" asChild>
+                <Link href={`/jury/competitions/${roundId}` as Route}>
+                  Back to Round
+                </Link>
+              </Button>
+            </div>
+          </CardContent>
+        </Card>
+      </div>
+    )
+  }
+
   return (
     <div className="space-y-6">
       <div className="flex items-center gap-4">