feat: make navigation menu auth-aware

Navigation links now change based on authentication state:
- Logged out: Home, Runs, Genlockes, Stats
- Logged in: New Run, My Runs, Genlockes, Stats
- Admin: adds Admin link

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

.beans/nuzlocke-tracker-h205--auth-aware-navigation-menu.md

@@ -1,11 +1,11 @@
 ---
 # nuzlocke-tracker-h205
 title: Auth-aware navigation menu
-status: todo
+status: completed
 type: task
 priority: normal
 created_at: 2026-03-21T10:06:20Z
-updated_at: 2026-03-21T10:06:24Z
+updated_at: 2026-03-21T10:22:08Z
 parent: nuzlocke-tracker-ce4o
 blocked_by:
     - nuzlocke-tracker-5svj
@@ -15,13 +15,24 @@ Update the Layout component to show different nav links based on auth state and
 
 ## Checklist
 
-- [ ] Replace static \`navLinks\` array with dynamic links based on \`useAuth()\` state
-- [ ] **Logged out**: Home, Runs, Genlockes, Stats (no New Run, no Admin)
-- [ ] **Logged in (non-admin)**: New Run, My Runs, Genlockes, Stats
-- [ ] **Logged in (admin)**: New Run, My Runs, Genlockes, Stats, Admin
-- [ ] Update both desktop and mobile nav (they share the same \`navLinks\` array, so this should be automatic)
-- [ ] Verify menu updates reactively on login/logout
+- [x] Replace static \`navLinks\` array with dynamic links based on \`useAuth()\` state
+- [x] **Logged out**: Home, Runs, Genlockes, Stats (no New Run, no Admin)
+- [x] **Logged in (non-admin)**: New Run, My Runs, Genlockes, Stats
+- [x] **Logged in (admin)**: New Run, My Runs, Genlockes, Stats, Admin
+- [x] Update both desktop and mobile nav (they share the same \`navLinks\` array, so this should be automatic)
+- [x] Verify menu updates reactively on login/logout
 
 ## Files to change
 
 - \`frontend/src/components/Layout.tsx\` — make \`navLinks\` dynamic based on auth state
+
+## Summary of Changes
+
+- Removed static `navLinks` array from module scope
+- Added dynamic `navLinks` computation inside `Layout` component using `useMemo`
+- Navigation now depends on `user` and `isAdmin` from `useAuth()`:
+  - Logged out: Home, Runs, Genlockes, Stats
+  - Logged in (non-admin): New Run, My Runs, Genlockes, Stats
+  - Logged in (admin): New Run, My Runs, Genlockes, Stats, Admin
+- Updated `isActive` function to handle Home route (`/`) correctly
+- Both desktop and mobile nav automatically use the same dynamic `navLinks` array

frontend/src/components/Layout.tsx

@@ -1,16 +1,8 @@
-import { useState } from 'react'
+import { useState, useMemo } from 'react'
 import { Link, Outlet, useLocation } from 'react-router-dom'
 import { useTheme } from '../hooks/useTheme'
 import { useAuth } from '../contexts/AuthContext'
 
-const navLinks = [
-  { to: '/runs/new', label: 'New Run' },
-  { to: '/runs', label: 'My Runs' },
-  { to: '/genlockes', label: 'Genlockes' },
-  { to: '/stats', label: 'Stats' },
-  { to: '/admin', label: 'Admin' },
-]
-
 function NavLink({
   to,
   active,
@@ -136,9 +128,34 @@ function UserMenu({ onAction }: { onAction?: () => void }) {
 export function Layout() {
   const [menuOpen, setMenuOpen] = useState(false)
   const location = useLocation()
+  const { user, isAdmin } = useAuth()
+
+  const navLinks = useMemo(() => {
+    if (!user) {
+      // Logged out: Home, Runs, Genlockes, Stats
+      return [
+        { to: '/', label: 'Home' },
+        { to: '/runs', label: 'Runs' },
+        { to: '/genlockes', label: 'Genlockes' },
+        { to: '/stats', label: 'Stats' },
+      ]
+    }
+    // Logged in: New Run, My Runs, Genlockes, Stats
+    const links = [
+      { to: '/runs/new', label: 'New Run' },
+      { to: '/runs', label: 'My Runs' },
+      { to: '/genlockes', label: 'Genlockes' },
+      { to: '/stats', label: 'Stats' },
+    ]
+    // Admin gets Admin link
+    if (isAdmin) {
+      links.push({ to: '/admin', label: 'Admin' })
+    }
+    return links
+  }, [user, isAdmin])
 
   function isActive(to: string) {
-    if (to === '/runs/new') return location.pathname === '/runs/new'
+    if (to === '/' || to === '/runs/new') return location.pathname === to
     return location.pathname.startsWith(to)
   }