bugfix(router): redirect to /workspaces if user is authenticated, otherwise redirect to /auth route + rename /login -> /auth

src/components/Navbar.tsx

@@ -71,7 +71,7 @@ export function Navbar() {
       setUser(null)
       setShowLogoutModal(false)
       toast.success(t.logoutToast || "Successfully logged out!")
-      navigate("/login")
+      navigate("/auth")
     }
   }
 
@@ -167,7 +167,7 @@ export function Navbar() {
             <>
               <SettingsMenu />
               <Button 
-                onClick={() => navigate("/login")}
+                onClick={() => navigate("/auth")}
                 className="bg-blue-600 text-white hover:bg-blue-700 dark:bg-blue-600 dark:hover:bg-blue-700"
               >
                 {t.login?.signIn || "Login"}