Implement Password Grant Flow for Authentication and Enhance User Experience
- Introduced Password Grant Flow for user authentication, allowing direct login with email and password. - Updated `useAuth` composable to manage login and logout processes, including Single Sign-Out from Cidaas. - Enhanced user interface with a new `UserMenu` component displaying user information and logout functionality. - Updated homepage to show personalized greetings for logged-in users and a login prompt for guests. - Added logout confirmation page with a countdown redirect to the homepage. - Documented the implementation details and future enhancements for OAuth2 flows in CLAUDE.md and other relevant documentation. - Added test credentials and guidelines for automated testing in the new TESTING.md file.
This commit is contained in:
Bastian Masanek
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## my.experimenta.science
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**Last Updated:** 2025-10-30
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**Last Updated:** 2025-11-01
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**Overall Progress:** 39/137 tasks (28.5%)
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**Current Phase:** ✅ Phase 3 - Authentication (Completed)
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**Current Phase:** ✅ Phase 3 - Authentication (Validated & Completed)
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---
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## 🚀 Current Work
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**Phase:** Phase 3 - Authentication ✅ **COMPLETED**
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**Phase:** Phase 3 - Authentication ✅ **VALIDATED & COMPLETED** (2025-11-01)
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**Validation Summary:**
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- ✅ Login flow tested with Playwright - **SUCCESS**
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- ✅ User created in database with `experimenta_id` (Cidaas sub: `97dcde33-d12e-4275-a0d5-e01cfbea37c2`)
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- ✅ Email, first name, last name correctly stored in users table
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- ✅ Session management functional
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- ✅ Timestamps (created_at, updated_at) working
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- ✅ Test credentials documented in .env.example
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- ✅ Documentation updated to reflect Password Grant Flow implementation
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**Implementation Note:**
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Actual implementation uses **Password Grant Flow** (not Authorization Code Flow with PKCE). This was a deliberate choice for MVP simplicity. Authorization Code Flow can be added later for SSO/Social login support.
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**Tasks Completed (18/18):**
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- ✅ Install nuxt-auth-utils + jose
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- ✅ Configure Cidaas environment variables in .env
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- ✅ Add Cidaas config to nuxt.config.ts runtimeConfig
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- ✅ Create PKCE generator utility (server/utils/pkce.ts)
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- ✅ Create Cidaas API client utility (server/utils/cidaas.ts)
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- ✅ Create Cidaas API client utility (server/utils/cidaas.ts) with `loginWithPassword()`
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- ✅ Create JWT validation utility (server/utils/jwt.ts)
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- ✅ Create /api/auth/login.post.ts endpoint
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- ✅ Create /api/auth/callback.get.ts endpoint
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- ✅ Create /api/auth/login.post.ts endpoint (Password Grant)
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- ✅ Create /api/auth/register.post.ts endpoint
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- ✅ Create /api/auth/logout.post.ts endpoint
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- ✅ Create /api/auth/me.get.ts endpoint
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@@ -51,7 +62,9 @@
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- ✅ Create auth page with tabs (pages/auth.vue)
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- ✅ Create auth middleware (middleware/auth.ts)
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- ✅ Create rate-limit middleware (server/middleware/rate-limit.ts)
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- ✅ Test OAuth2 flow end-to-end and document authentication flow
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- ✅ Test authentication flow end-to-end (**VALIDATED 2025-11-01**)
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- ✅ Validate database user creation (**VALIDATED 2025-11-01**)
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- ✅ Update documentation to reflect actual implementation
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**Next Steps:**
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@@ -416,7 +429,8 @@ Tasks:
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| 2025-01-29 | 0% | Planning | Task system created |
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| 2025-10-29 | 6.6% | Phase 1 - MVP | ✅ Foundation completed: Nuxt 4, shadcn-nuxt, Tailwind CSS, ESLint, Prettier all configured |
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| 2025-10-30 | 15.3% | Phase 2 - MVP | ✅ Database completed: Drizzle ORM, all tables defined, migrations applied, Studio working, schema documented |
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| 2025-10-30 | 28.5% | Phase 3 - MVP | ✅ Authentication completed: OAuth2/OIDC with PKCE, JWT validation, auth endpoints, UI components, middleware |
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| 2025-10-30 | 28.5% | Phase 3 - MVP | ✅ Authentication completed: Password Grant Flow, JWT validation, auth endpoints, UI components, middleware |
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| 2025-11-01 | 28.5% | Phase 3 - Validation | ✅ Authentication validated: Login tested with Playwright, DB user creation verified, docs updated |
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---
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@@ -211,6 +211,125 @@ Implement complete Cidaas OAuth2/OIDC authentication with custom UI: login, regi
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- **Session Duration:** Configured to 30 days (can be adjusted in nuxt-auth-utils config)
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- **Custom UI:** We're NOT using Cidaas hosted pages - fully custom experimenta-branded UI
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## Implementation Notes (Validation: 2025-11-01)
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**Actual Implementation:** The team implemented **Password Grant Flow** (Resource Owner Password Credentials) instead of Authorization Code Flow with PKCE.
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**Why this approach:**
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- ✅ Simpler UX: User stays in our app, no redirects to Cidaas
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- ✅ Faster development: Less complex flow, fewer endpoints
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- ✅ Sufficient for MVP: Private users logging in with email/password
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- ⚠️ Trade-off: Client app handles passwords directly
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- ⚠️ Limitation: Doesn't support SSO/Social logins (would require redirect flow)
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**Validation Results (Test Credentials: bm@noxware.de):**
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- ✅ Login flow works correctly
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- ✅ User created in database with `experimenta_id` (Cidaas sub: `97dcde33-d12e-4275-a0d5-e01cfbea37c2`)
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- ✅ Email, first name, last name correctly stored
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- ✅ Session management functional
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- ✅ Timestamps (created_at, updated_at) working
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**Files Actually Implemented:**
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- ✅ `server/utils/cidaas.ts` - Includes `loginWithPassword()` function
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- ✅ `server/api/auth/login.post.ts` - Direct password login (not redirect flow)
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- ✅ `app/composables/useAuth.ts` - Login with email + password parameters
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- ✅ `app/components/Auth/LoginForm.vue` - Email + password form fields
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- ❌ `server/utils/pkce.ts` - NOT IMPLEMENTED (not needed for password flow)
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- ❌ `server/api/auth/callback.get.ts` - NOT IMPLEMENTED (no redirect, no callback)
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**Future Enhancement:**
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For Phase 2+ (Educator/Company roles, SSO), consider implementing Authorization Code Flow with PKCE as originally documented. The Password Grant flow is perfectly fine for MVP with private users.
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---
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## UI Enhancements (2025-11-01)
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**Login Status Display & Logout Functionality**
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After completing core authentication, the following UI enhancements were implemented to show login status and provide logout functionality:
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**Components Installed:**
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- ✅ Avatar component from shadcn-vue (via `npx shadcn-nuxt@latest add avatar`)
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- ✅ DropdownMenu component from shadcn-vue (via `npx shadcn-nuxt@latest add dropdown-menu`)
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**Files Implemented:**
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1. **`app/components/UserMenu.vue`** - User menu with avatar and dropdown
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- Displays user initials in circular avatar with experimenta-accent background
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- Avatar styling: h-12 w-12, border-3, font-bold, shadow-md, bg-experimenta-accent
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- AvatarFallback styling: w-full h-full flex items-center justify-center (ensures background fills entire circle)
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- Hover effect: scale-105 with shadow-lg
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- Dropdown menu with user info (name, email)
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- Profile menu item (disabled, placeholder for Phase 2+)
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- Logout menu item with icon
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- Z-index: 200 (above header which has z-index: 100)
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2. **`app/pages/logout.vue`** - Logout confirmation page
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- Success icon (CheckCircle from lucide-vue-next)
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- 3-second countdown with auto-redirect to homepage
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- "Jetzt zur Startseite" button for immediate redirect
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- Countdown cleanup on component unmount
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3. **`server/utils/cidaas.ts`** - Enhanced with Cidaas Single Sign-Out
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- Added `logoutFromCidaas(accessToken)` function
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- POST to `{issuer}/session/end_session` endpoint
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- Parameters: `access_token_hint`, `post_logout_redirect_uri`
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- Error handling with graceful fallback
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4. **`server/api/auth/login.post.ts`** - Enhanced to store access token
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- Stores `accessToken` in session for later use in logout
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- Required for Cidaas Single Sign-Out
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5. **`server/api/auth/logout.post.ts`** - Enhanced with Cidaas SSO
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- Calls `logoutFromCidaas()` if access token exists
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- Clears local session via `clearUserSession()`
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- Graceful error handling (clears session even if Cidaas logout fails)
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6. **`app/composables/useAuth.ts`** - Enhanced logout function
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- Calls `/api/auth/logout` endpoint
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- Clears client-side state
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- Redirects to `/logout` confirmation page
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7. **`app/components/CommonHeader.vue`** - Updated to show UserMenu
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- Conditionally displays `<UserMenu />` when `loggedIn` is true
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- Flexbox layout with logo (left) and user menu (right)
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8. **`app/pages/index.vue`** - Updated homepage
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- Personalized welcome message: "Willkommen zurück, {firstName}!"
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- Login prompt card for guests with "Jetzt anmelden" button
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- Link to `/auth` page for login/registration
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9. **`nuxt.config.ts`** - Added postLogoutRedirectUri
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- `postLogoutRedirectUri: process.env.CIDAAS_POST_LOGOUT_REDIRECT_URI || process.env.APP_URL || 'http://localhost:3000'`
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- Must match URL configured in Cidaas Admin Panel
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**Cidaas Configuration Required:**
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- In Cidaas Admin Panel → App Settings → Allowed Logout URLs:
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- Add `http://localhost:3000/logout` (development)
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- Add `https://my.experimenta.science/logout` (production)
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**Testing Results (Playwright):**
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- ✅ Avatar displays correctly with user initials
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- ✅ Avatar has proper styling (size h-12 w-12, Safrangold background fills entire circle)
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- ✅ Hover effect works (scale + shadow)
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- ✅ Dropdown menu opens on avatar click
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- ✅ Dropdown menu appears above header (z-index: 200)
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- ✅ User info displays correctly in dropdown
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- ✅ Logout button triggers logout flow
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- ✅ Cidaas Single Sign-Out executes successfully
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- ✅ Logout page shows countdown (3 seconds)
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- ✅ Auto-redirect to homepage works
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- ✅ Homepage shows personalized welcome for logged-in users
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- ✅ Homepage shows login button for guests
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**Design Decisions:**
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- **Avatar Initials:** First letter of firstName + first letter of lastName (e.g., "Bastian Masanek" → "BM")
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- **Avatar Size:** h-12 w-12 (increased from initial h-10 w-10 for better visibility)
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- **Background Color:** experimenta-accent (Safrangold) for brand consistency
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- **Countdown Duration:** 3 seconds (user preference over initial 5 seconds)
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- **Logout Flow:** Single Sign-Out at Cidaas + local session clear + confirmation page
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- **Z-Index Hierarchy:** Header (100) < Dropdown Menu (200) to prevent overlap issues
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---
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## Blockers
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