Fix API endpoint for setting CSRF token in auth store

frontend/src/stores/auth.ts

@@ -24,7 +24,7 @@ export const useAuthStore = defineStore('auth', {
   },
   actions: {
     async setCsrfToken(): Promise<void> {
-      await fetch('http://localhost:8000/api/set-csrf-token', {
+      await fetch('http://localhost:8000/api/set_csrf_token', {
         method: 'GET',
         credentials: 'include',
       })