feature: "add header and navigation link to each pages"
expanded_at: "2025-12-18T17:06:45"
mode: full_auto

analysis:
  problem_statement: "The application lacks a consistent navigation header, making it difficult for users to navigate between pages. Currently, each page operates independently without a unified navigation experience."
  target_users: "All users of the SonicCloud platform - listeners, musicians, and label representatives"
  core_value: "Provide consistent navigation and brand identity across all pages"

scope:
  mvp_features:
    - Global header component with logo and navigation links
    - Navigation links to main sections (Home, Search, Playlists, Upload, Profile)
    - Responsive design for mobile and desktop
    - User authentication state display (login/register vs profile)
    - Integration into root layout for consistent appearance
  future_features:
    - Search bar in header
    - User dropdown menu
    - Notifications bell

data_model:
  entities: []
  notes: "No database changes required - uses existing user auth state"

api_endpoints: []
  # No new API endpoints required - uses existing auth endpoints

ui_structure:
  pages: []
  components:
    - name: Header
      purpose: "Global header with logo, navigation, and user auth state"
      file_path: "components/Header.tsx"
    - name: NavLink
      purpose: "Styled navigation link with active state indicator"
      file_path: "components/NavLink.tsx"
    - name: UserMenu
      purpose: "User authentication status display (login/profile)"
      file_path: "components/UserMenu.tsx"

layout_integration:
  target: "app/layout.tsx"
  changes:
    - "Import and render Header component above children"
    - "Update metadata with proper SonicCloud branding"

navigation_links:
  - label: "Home"
    href: "/"
    icon: "home"
  - label: "Search"
    href: "/search"
    icon: "search"
  - label: "Playlists"
    href: "/playlists"
    icon: "playlist"
  - label: "Upload"
    href: "/upload"
    icon: "upload"
    auth_required: true

security:
  authentication: "Uses existing session/cookie auth"
  authorization: "Some nav items (Upload) only shown to authenticated users"

edge_cases:
  - scenario: "User not logged in"
    handling: "Show Login/Register buttons instead of profile"
  - scenario: "Mobile viewport"
    handling: "Responsive hamburger menu"
  - scenario: "Active page indication"
    handling: "Highlight current page in navigation"

acceptance_criteria:
  - criterion: "Header appears on all pages"
    verification: "Navigate to each page and verify header presence"
  - criterion: "Navigation links work correctly"
    verification: "Click each link and verify navigation"
  - criterion: "Active state shows current page"
    verification: "Check that current page is highlighted"
  - criterion: "Responsive on mobile"
    verification: "Test at mobile viewport width"
  - criterion: "Auth state reflected"
    verification: "Header shows appropriate content for logged in/out users"