UI simplification: remove redundant pages, reorganize Quick Actions

Phase 2 UI Cleanup:
- Delete empty programs/[id]/settings page
- Delete redundant projects/[id]/assignments page (use round-level management)
- Delete unused /users redirect directory
- Remove Settings button from program detail page
- Reorganize Round Quick Actions into visual groups (Project Management, Round Management)

Note: Mentor inline assignment deferred - the existing mentor page has
complex AI suggestion functionality that would need careful refactoring.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/(admin)/admin/programs/[id]/page.tsx

@@ -18,7 +18,7 @@ import {
   TableHeader,
   TableRow,
 } from '@/components/ui/table'
-import { ArrowLeft, Pencil, Plus, Settings } from 'lucide-react'
+import { ArrowLeft, Pencil, Plus } from 'lucide-react'
 import { formatDateOnly } from '@/lib/utils'
 
 interface ProgramDetailPageProps {
@@ -64,20 +64,12 @@ export default async function ProgramDetailPage({ params }: ProgramDetailPagePro
             </p>
           </div>
         </div>
-        <div className="flex gap-2">
-          <Button variant="outline" asChild>
-            <Link href={`/admin/programs/${id}/edit`}>
-              <Pencil className="mr-2 h-4 w-4" />
-              Edit
-            </Link>
-          </Button>
-          <Button variant="outline" asChild>
-            <Link href={`/admin/programs/${id}/settings`}>
-              <Settings className="mr-2 h-4 w-4" />
-              Settings
-            </Link>
-          </Button>
-        </div>
+        <Button variant="outline" asChild>
+          <Link href={`/admin/programs/${id}/edit`}>
+            <Pencil className="mr-2 h-4 w-4" />
+            Edit
+          </Link>
+        </Button>
       </div>
 
       {program.description && (

src/app/(admin)/admin/programs/[id]/settings/page.tsx

@@ -1,83 +0,0 @@
-'use client'
-
-import { useParams } from 'next/navigation'
-import Link from 'next/link'
-import { trpc } from '@/lib/trpc/client'
-import { Button } from '@/components/ui/button'
-import {
-  Card,
-  CardContent,
-  CardDescription,
-  CardHeader,
-  CardTitle,
-} from '@/components/ui/card'
-import { Skeleton } from '@/components/ui/skeleton'
-import { ArrowLeft } from 'lucide-react'
-
-export default function ProgramSettingsPage() {
-  const params = useParams()
-  const id = params.id as string
-
-  const { data: program, isLoading } = trpc.program.get.useQuery({ id })
-
-  if (isLoading) {
-    return (
-      <div className="space-y-6">
-        <div className="flex items-center gap-4">
-          <Skeleton className="h-10 w-10" />
-          <div className="space-y-2">
-            <Skeleton className="h-8 w-48" />
-            <Skeleton className="h-4 w-32" />
-          </div>
-        </div>
-        <Card>
-          <CardContent className="space-y-4 pt-6">
-            <Skeleton className="h-10 w-full" />
-            <Skeleton className="h-10 w-full" />
-          </CardContent>
-        </Card>
-      </div>
-    )
-  }
-
-  return (
-    <div className="space-y-6">
-      <div className="flex items-center gap-4">
-        <Link href={`/admin/programs/${id}`}>
-          <Button variant="ghost" size="icon">
-            <ArrowLeft className="h-4 w-4" />
-          </Button>
-        </Link>
-        <div>
-          <h1 className="text-2xl font-bold">Program Settings</h1>
-          <p className="text-muted-foreground">
-            Configure settings for {program?.name}
-          </p>
-        </div>
-      </div>
-
-      <Card>
-        <CardHeader>
-          <CardTitle>Program Configuration</CardTitle>
-          <CardDescription>
-            Advanced settings for this program
-          </CardDescription>
-        </CardHeader>
-        <CardContent>
-          <div className="py-8 text-center text-muted-foreground">
-            Program-specific settings will be available in a future update.
-            <br />
-            For now, manage rounds and projects through the program detail page.
-          </div>
-          <div className="flex justify-center">
-            <Button asChild>
-              <Link href={`/admin/programs/${id}`}>
-                Back to Program
-              </Link>
-            </Button>
-          </div>
-        </CardContent>
-      </Card>
-    </div>
-  )
-}