Fix local login flow, add new auth epic

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

@@ -0,0 +1,27 @@
+---
+# nuzlocke-tracker-h205
+title: Auth-aware navigation menu
+status: todo
+type: task
+priority: normal
+created_at: 2026-03-21T10:06:20Z
+updated_at: 2026-03-21T10:06:24Z
+parent: nuzlocke-tracker-ce4o
+blocked_by:
+    - nuzlocke-tracker-5svj
+---
+
+Update the Layout component to show different nav links based on auth state and admin role.
+
+## 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
+
+## Files to change
+
+- \`frontend/src/components/Layout.tsx\` — make \`navLinks\` dynamic based on auth state