feat(M9): active product backlog — persistent active PB, NavBar splits, sprint card styling (#10)

* feat(tooling): extend backlog parser to support PBI-x milestone headers

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

* chore(backlog): mark ST-801–806 as done

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

* feat(backlog): sorteer PBI's en stories op prio/code/datum, onthoud keuze in localStorage; vergroot sprint-afronden dialoog

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

* feat(ST-901): add user.active_product_id with FK to Product

- Nullable relation User → Product with onDelete: SetNull
- Index on active_product_id for join performance
- Migration: 20260427165329_add_user_active_product_id
- Install @tanstack/react-table (was missing from node_modules)
- Fix PRIORITY_COLORS ref removed in earlier refactor
- Note: User schema change affects vendor/scrum4me-mcp submodule — run prisma generate + tsc --noEmit there after merge

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

* fix: restore priority color on PBI filter pill

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

* feat(ST-902): add setActiveProduct + clearActiveProduct server actions

- actions/active-product.ts: setActiveProductAction validates access via
  productAccessFilter, rejects archived products and demo users
- archiveProductAction: clears active_product_id for all affected users in transaction
- removeProductMemberAction: clears active_product_id for removed member
- leaveProductAction: clears active_product_id for leaving user

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

* feat(ST-903): load active product in layout, replace cookie with DB lookup in solo

- layout.tsx: fetch active_product_id, resolve product, clear stale ref server-side
- NavBar: add activeProduct prop (rendering changes in ST-904)
- solo/page.tsx: redirect via user.active_product_id instead of lastProductId cookie
- proxy.ts: remove lastProductId cookie logic
- lib/cookies.ts: deleted (no longer used)

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

* feat(ST-904): split NavBar into 5 tabs with disabled-states and product-switcher dropdown

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

* feat(ST-905): add Activeer button per product row in dashboard and product header

* feat(ST-906): redirect to dashboard with toast when active product becomes inaccessible

* feat(ST-907): tests for active-product actions and functional spec update for M9

* docs(M9): add implementation plan document and link from backlog

* feat: active PB indicator, Maak actief button and new product link in settings

* feat: apply priority-color card style to sprint story rows

* fix: move add-to-sprint click from entire card to + Toevoegen button

* feat: apply priority-color card style to sprint task rows

* fix(sprint-backlog): prevent text selection on PBI collapse button

* chore: bump version to 0.4.0 (M9 active product backlog)

* fix(landing): align logged-in nav left to match app NavBar

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

proxy.ts

@@ -5,9 +5,6 @@ import { sessionOptions } from '@/lib/session'
 const protectedRoutes = ['/dashboard', '/products', '/todos', '/settings', '/solo']
 const authRoutes = ['/login', '/register']
 
-const SOLO_ROUTE = /^\/products\/([^/]+)\/solo$/
-const THIRTY_DAYS_SECONDS = 60 * 60 * 24 * 30
-
 export function proxy(request: NextRequest) {
   const path = request.nextUrl.pathname
   const isProtected = protectedRoutes.some(r => path.startsWith(r))
@@ -24,20 +21,7 @@ export function proxy(request: NextRequest) {
     return NextResponse.redirect(new URL('/dashboard', request.url))
   }
 
-  const response = NextResponse.next()
-
-  // Remember last visited product for /solo redirect
-  const soloMatch = path.match(SOLO_ROUTE)
-  if (soloMatch) {
-    response.cookies.set('lastProductId', soloMatch[1], {
-      httpOnly: true,
-      sameSite: 'lax',
-      maxAge: THIRTY_DAYS_SECONDS,
-      path: '/',
-    })
-  }
-
-  return response
+  return NextResponse.next()
 }
 
 export const config = {