Jury management: create, delete, add/remove members from round detail page

- Added Jury tab to round detail page with full jury management inline
- Create new jury groups (auto-assigns to current round)
- Delete jury groups with confirmation dialog
- Add/remove members with inline member list
- Assign/switch jury groups via dropdown selector
- Added delete endpoint to juryGroup router (unlinks rounds, deletes members)
- Removed CHAIR/OBSERVER role selectors from add-member dialog (all members)
- Removed role column from jury-members-table

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

src/server/routers/juryGroup.ts

@@ -249,6 +249,50 @@ export const juryGroupRouter = router({
       return existing
     }),
 
+  /**
+   * Delete a jury group entirely
+   */
+  delete: adminProcedure
+    .input(z.object({ id: z.string() }))
+    .mutation(async ({ ctx, input }) => {
+      const group = await ctx.prisma.juryGroup.findUniqueOrThrow({
+        where: { id: input.id },
+        include: {
+          _count: { select: { assignments: true, rounds: true } },
+        },
+      })
+
+      // Unlink any rounds that reference this jury group
+      await ctx.prisma.round.updateMany({
+        where: { juryGroupId: input.id },
+        data: { juryGroupId: null },
+      })
+
+      // Delete all members first (cascade should handle this, but be explicit)
+      await ctx.prisma.juryGroupMember.deleteMany({
+        where: { juryGroupId: input.id },
+      })
+
+      await ctx.prisma.juryGroup.delete({ where: { id: input.id } })
+
+      await logAudit({
+        prisma: ctx.prisma,
+        userId: ctx.user.id,
+        action: 'DELETE',
+        entityType: 'JuryGroup',
+        entityId: input.id,
+        detailsJson: {
+          name: group.name,
+          competitionId: group.competitionId,
+          memberCount: group._count.assignments,
+        },
+        ipAddress: ctx.ip,
+        userAgent: ctx.userAgent,
+      })
+
+      return { success: true, name: group.name }
+    }),
+
   /**
    * Update a jury group member's role/overrides
    */