Merge branch 'main' into feat/l1-workspace

# Conflicts:
#	frontend/src/router.tsx

frontend/src/components/layout/ProtectedRoute.tsx

@@ -22,7 +22,7 @@ export function ProtectedRoute({ requiredRole, children }: ProtectedRouteProps)
   }
 
   if (!isAuthenticated) {
-    return <Navigate to="/landing" state={{ from: location }} replace />
+    return <Navigate to="/" state={{ from: location }} replace />
   }
 
   // Enforce must_change_password — redirect unless already on /change-password