Refactor navigation and authentication flow, prevent mounting login page multiple times

- Improved protected route handling
- Enhanced direct login access detection
- Centralized navigation logic
- Optimized state reset process
- Fixed logout navigation behavior

lightrag_webui/src/api/lightrag.ts

@@ -2,7 +2,6 @@ import axios, { AxiosError } from 'axios'
 import { backendBaseUrl } from '@/lib/constants'
 import { errorMessage } from '@/lib/utils'
 import { useSettingsStore } from '@/stores/settings'
-import { useAuthStore } from '@/stores/state'
 import { navigationService } from '@/services/navigation'
 
 // Types
@@ -174,10 +173,6 @@ axiosInstance.interceptors.response.use(
   (error: AxiosError) => {
     if (error.response) {
       if (error.response?.status === 401) {
-        localStorage.removeItem('LIGHTRAG-API-TOKEN');
-        sessionStorage.clear();
-        useAuthStore.getState().logout();
-
         // Use navigation service to handle redirection
         navigationService.navigateToLogin();