Auto-reassign projects when juror declares conflict of interest

When a juror declares COI, the system now automatically:
- Finds an eligible replacement juror (not at capacity, no COI, not already assigned)
- Deletes the conflicted assignment and creates a new one
- Notifies the replacement juror and admins
- Load-balances by picking the juror with fewest current assignments

Also adds:
- "Reassign (COI)" action in assignment table dropdown with COI badge indicator
- Admin "Reassign to another juror" in COI review now triggers actual reassignment
- Per-juror notify button is now always visible (not just on hover)
- reassignCOI admin procedure for retroactive manual reassignment

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

src/app/(admin)/admin/rounds/[roundId]/page.tsx

@@ -2411,7 +2411,7 @@ function JuryProgressTable({ roundId }: { roundId: string }) {
                             <Button
                               variant="ghost"
                               size="icon"
-                              className="h-5 w-5 opacity-0 group-hover:opacity-100 transition-opacity"
+                              className="h-5 w-5 text-muted-foreground hover:text-foreground"
                               disabled={notifyMutation.isPending}
                               onClick={() => notifyMutation.mutate({ roundId, userId: juror.id })}
                             >
@@ -2671,6 +2671,17 @@ function IndividualAssignmentsTable({
     onError: (err) => toast.error(err.message),
   })
 
+  const reassignCOIMutation = trpc.assignment.reassignCOI.useMutation({
+    onSuccess: (data) => {
+      utils.assignment.listByStage.invalidate({ roundId })
+      utils.roundEngine.getProjectStates.invalidate({ roundId })
+      utils.analytics.getJurorWorkload.invalidate({ roundId })
+      utils.evaluation.listCOIByStage.invalidate({ roundId })
+      toast.success(`Reassigned to ${data.newJurorName}`)
+    },
+    onError: (err) => toast.error(err.message),
+  })
+
   const createMutation = trpc.assignment.create.useMutation({
     onSuccess: () => {
       utils.assignment.listByStage.invalidate({ roundId })
@@ -2875,19 +2886,27 @@ function IndividualAssignmentsTable({
               >
                 <span className="truncate">{a.user?.name || a.user?.email || 'Unknown'}</span>
                 <span className="truncate text-muted-foreground">{a.project?.title || 'Unknown'}</span>
-                <Badge
-                  variant="outline"
-                  className={cn(
-                    'text-[10px] justify-center',
-                    a.evaluation?.status === 'SUBMITTED'
-                      ? 'bg-emerald-50 text-emerald-700 border-emerald-200'
-                      : a.evaluation?.status === 'DRAFT'
-                        ? 'bg-blue-50 text-blue-700 border-blue-200'
-                        : 'bg-gray-50 text-gray-600 border-gray-200',
+                <div className="flex items-center gap-1">
+                  {a.conflictOfInterest?.hasConflict ? (
+                    <Badge variant="outline" className="text-[10px] justify-center bg-red-50 text-red-700 border-red-200">
+                      COI
+                    </Badge>
+                  ) : (
+                    <Badge
+                      variant="outline"
+                      className={cn(
+                        'text-[10px] justify-center',
+                        a.evaluation?.status === 'SUBMITTED'
+                          ? 'bg-emerald-50 text-emerald-700 border-emerald-200'
+                          : a.evaluation?.status === 'DRAFT'
+                            ? 'bg-blue-50 text-blue-700 border-blue-200'
+                            : 'bg-gray-50 text-gray-600 border-gray-200',
+                      )}
+                    >
+                      {a.evaluation?.status || 'PENDING'}
+                    </Badge>
                   )}
-                >
-                  {a.evaluation?.status || 'PENDING'}
-                </Badge>
+                </div>
                 <DropdownMenu>
                   <DropdownMenuTrigger asChild>
                     <Button variant="ghost" size="icon" className="h-7 w-7">
@@ -2895,6 +2914,18 @@ function IndividualAssignmentsTable({
                     </Button>
                   </DropdownMenuTrigger>
                   <DropdownMenuContent align="end">
+                    {a.conflictOfInterest?.hasConflict && (
+                      <>
+                        <DropdownMenuItem
+                          onClick={() => reassignCOIMutation.mutate({ assignmentId: a.id })}
+                          disabled={reassignCOIMutation.isPending}
+                        >
+                          <UserPlus className="h-3.5 w-3.5 mr-2 text-blue-600" />
+                          Reassign (COI)
+                        </DropdownMenuItem>
+                        <DropdownMenuSeparator />
+                      </>
+                    )}
                     {a.evaluation && (
                       <>
                         <DropdownMenuItem
@@ -3988,9 +4019,15 @@ function COIReviewSection({ roundId }: { roundId: string }) {
   )
 
   const reviewMutation = trpc.evaluation.reviewCOI.useMutation({
-    onSuccess: () => {
+    onSuccess: (data) => {
       utils.evaluation.listCOIByStage.invalidate({ roundId })
-      toast.success('COI review updated')
+      utils.assignment.listByStage.invalidate({ roundId })
+      utils.analytics.getJurorWorkload.invalidate({ roundId })
+      if (data.reassignment) {
+        toast.success(`Reassigned to ${data.reassignment.newJurorName}`)
+      } else {
+        toast.success('COI review updated')
+      }
     },
     onError: (err) => toast.error(err.message),
   })