Round system redesign: Phases 1-7 complete

Full pipeline/track/stage architecture replacing the legacy round system.

Schema: 11 new models (Pipeline, Track, Stage, StageTransition,
ProjectStageState, RoutingRule, Cohort, CohortProject, LiveProgressCursor,
OverrideAction, AudienceVoter) + 8 new enums.

Backend: 9 new routers (pipeline, stage, routing, stageFiltering,
stageAssignment, cohort, live, decision, award) + 6 new services
(stage-engine, routing-engine, stage-filtering, stage-assignment,
stage-notifications, live-control).

Frontend: Pipeline wizard (17 components), jury stage pages (7),
applicant pipeline pages (3), public stage pages (2), admin pipeline
pages (5), shared stage components (3), SSE route, live hook.

Phase 6 refit: 23 routers/services migrated from roundId to stageId,
all frontend components refitted. Deleted round.ts (985 lines),
roundTemplate.ts, round-helpers.ts, round-settings.ts, round-type-settings.tsx,
10 legacy admin pages, 7 legacy jury pages, 3 legacy dialogs.

Phase 7 validation: 36 tests (10 unit + 8 integration files) all passing,
TypeScript 0 errors, Next.js build succeeds, 13 integrity checks,
legacy symbol sweep clean, auto-seed on first Docker startup.

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

src/components/layouts/admin-sidebar.tsx

@@ -58,6 +58,7 @@ type NavItem = {
   icon: typeof LayoutDashboard
   activeMatch?: string   // pathname must include this to be active
   activeExclude?: string // pathname must NOT include this to be active
+  subItems?: { name: string; href: string }[]
 }
 
 // Main navigation - scoped to selected edition
@@ -69,7 +70,7 @@ const navigation: NavItem[] = [
   },
   {
     name: 'Rounds',
-    href: '/admin/rounds',
+    href: '/admin/rounds/pipelines',
     icon: CircleDot,
   },
   {
@@ -221,24 +222,51 @@ export function AdminSidebar({ user }: AdminSidebarProps) {
               const isActive =
                 pathname === item.href ||
                 (item.href !== '/admin' && pathname.startsWith(item.href))
+              const isParentActive = item.subItems
+                ? pathname.startsWith('/admin/rounds')
+                : false
               return (
-                <Link
-                  key={item.name}
-                  href={item.href as Route}
-                  onClick={() => setIsMobileMenuOpen(false)}
-                  className={cn(
-                    'group flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-all duration-150',
-                    isActive
-                      ? 'bg-brand-blue text-white shadow-xs'
-                      : 'text-muted-foreground hover:bg-muted hover:text-foreground'
+                <div key={item.name}>
+                  <Link
+                    href={item.href as Route}
+                    onClick={() => setIsMobileMenuOpen(false)}
+                    className={cn(
+                      'group flex items-center gap-3 rounded-lg px-3 py-2.5 text-sm font-medium transition-all duration-150',
+                      isActive
+                        ? 'bg-brand-blue text-white shadow-xs'
+                        : 'text-muted-foreground hover:bg-muted hover:text-foreground'
+                    )}
+                  >
+                    <item.icon className={cn(
+                      'h-4 w-4 transition-colors',
+                      isActive ? 'text-white' : 'text-muted-foreground group-hover:text-foreground'
+                    )} />
+                    {item.name}
+                  </Link>
+                  {item.subItems && isParentActive && (
+                    <div className="ml-7 mt-0.5 space-y-0.5">
+                      {item.subItems.map((sub) => {
+                        const isSubActive = pathname === sub.href ||
+                          (sub.href !== '/admin/rounds' && pathname.startsWith(sub.href))
+                        return (
+                          <Link
+                            key={sub.name}
+                            href={sub.href as Route}
+                            onClick={() => setIsMobileMenuOpen(false)}
+                            className={cn(
+                              'block rounded-md px-3 py-1.5 text-xs font-medium transition-colors',
+                              isSubActive
+                                ? 'text-brand-blue bg-brand-blue/10'
+                                : 'text-muted-foreground hover:text-foreground hover:bg-muted'
+                            )}
+                          >
+                            {sub.name}
+                          </Link>
+                        )
+                      })}
+                    </div>
                   )}
-                >
-                  <item.icon className={cn(
-                    'h-4 w-4 transition-colors',
-                    isActive ? 'text-white' : 'text-muted-foreground group-hover:text-foreground'
-                  )} />
-                  {item.name}
-                </Link>
+                </div>
               )
             })}
           </div>