Fix juror drop: remove from jury group + reassign projects

The reassignDroppedJuror flow was missing a key step — after
reshuffling unsubmitted projects to other jurors, the dropped juror
was not removed from the jury group. This meant they could be
re-assigned in future assignment runs. Now deletes the JuryGroupMember
record after reshuffle, logs removal in audit, and updates the
confirmation dialog to reflect the full action.

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

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

@@ -2376,11 +2376,12 @@ function JuryProgressTable({ roundId }: { roundId: string }) {
       utils.assignment.listByStage.invalidate({ roundId })
       utils.roundEngine.getProjectStates.invalidate({ roundId })
       utils.analytics.getJurorWorkload.invalidate({ roundId })
+      utils.roundAssignment.unassignedQueue.invalidate({ roundId })
 
       if (data.failedCount > 0) {
-        toast.warning(`Reassigned ${data.movedCount} project(s). ${data.failedCount} could not be reassigned (all remaining jurors at cap/blocked).`)
+        toast.warning(`Dropped juror and reassigned ${data.movedCount} project(s). ${data.failedCount} could not be reassigned (all remaining jurors at cap/blocked).`)
       } else {
-        toast.success(`Reassigned ${data.movedCount} project(s) evenly across available jurors.`)
+        toast.success(`Dropped juror and reassigned ${data.movedCount} project(s) evenly across available jurors.`)
       }
     },
     onError: (err) => toast.error(err.message),
@@ -2452,7 +2453,7 @@ function JuryProgressTable({ roundId }: { roundId: string }) {
                               disabled={reshuffleMutation.isPending}
                               onClick={() => {
                                 const ok = window.confirm(
-                                  `Reassign all unsubmitted projects from ${juror.name} to other jurors within their caps? Submitted and locked evaluations will be preserved. This cannot be undone.`
+                                  `Remove ${juror.name} from this jury pool and reassign all their unsubmitted projects to other jurors within their caps? Submitted evaluations will be preserved. This cannot be undone.`
                                 )
                                 if (!ok) return
                                 reshuffleMutation.mutate({ roundId, jurorId: juror.id })

src/server/routers/assignment.ts

@@ -433,6 +433,19 @@ async function reassignDroppedJurorAssignments(params: {
     })
   }
 
+  // Remove the dropped juror from the jury group so they can't be re-assigned
+  // in future assignment runs for this round's competition.
+  let removedFromGroup = false
+  if (round.juryGroupId) {
+    const deleted = await prisma.juryGroupMember.deleteMany({
+      where: {
+        juryGroupId: round.juryGroupId,
+        userId: params.droppedJurorId,
+      },
+    })
+    removedFromGroup = deleted.count > 0
+  }
+
   if (params.auditUserId) {
     await logAudit({
       prisma,
@@ -448,6 +461,7 @@ async function reassignDroppedJurorAssignments(params: {
         failedProjects,
         skippedProjects,
         reassignedTo,
+        removedFromGroup,
       },
       ipAddress: params.auditIp,
       userAgent: params.auditUserAgent,