Admin dashboard & round management UX overhaul

- Extract round detail monolith (2900→600 lines) into 13 standalone components
- Add shared round/status config (round-config.ts) replacing 4 local copies
- Delete 12 legacy competition-scoped pages, merge project pool into projects page
- Add round-type-specific dashboard stat panels (submission, mentoring, live final, deliberation, summary)
- Add contextual header quick actions based on active round type
- Improve pipeline visualization: progress bars, checkmarks, chevron connectors, overflow fix
- Add config tab completion dots (green/amber/red) and inline validation warnings
- Enhance juries page with round assignments, member avatars, and cap mode badges
- Add context-aware project list (recent submissions vs active evaluations)
- Move competition settings into Manage Editions page

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

src/app/(admin)/admin/projects/page.tsx

@@ -637,7 +637,7 @@ export default function ProjectsPage() {
             )}
           </Button>
           <Button variant="outline" asChild>
-            <Link href="/admin/projects/pool">
+            <Link href="/admin/projects?hasAssign=false">
               <Layers className="mr-2 h-4 w-4" />
               Assign to Round
             </Link>