🧭 fix: Add Base Path Support for Login/Register and Image Paths (#10116)

* fix: add basePath pattern to support login/register and image paths

* Fix linter errors

* refactor: Update import statements for getBasePath and isEnabled, and add path utility functions with tests

- Refactored imports in addImages.js and StableDiffusion.js to use getBasePath from '@librechat/api'.
- Consolidated isEnabled and getBasePath imports in validateImageRequest.js.
- Introduced new path utility functions in path.ts and corresponding unit tests in path.spec.ts to validate base path extraction logic.

* fix: Update domain server base URL in MarkdownComponents and refactor authentication redirection logic

- Changed the domain server base URL in MarkdownComponents.tsx to use the API base URL.
- Refactored the useAuthRedirect hook to utilize React Router's navigate for redirection instead of window.location, ensuring a smoother SPA experience.
- Added unit tests for the useAuthRedirect hook to verify authentication redirection behavior.

* test: Mock isEnabled in validateImages.spec.js for improved test isolation

- Updated validateImages.spec.js to mock the isEnabled function from @librechat/api, ensuring that tests can run independently of the actual implementation.
- Cleared the DOMAIN_CLIENT environment variable before tests to avoid interference with basePath resolution.

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Co-authored-by: Danny Avila <danny@librechat.ai>

packages/data-provider/src/api-endpoints.ts

@@ -149,6 +149,10 @@ export const resetPassword = () => `${BASE_URL}/api/auth/resetPassword`;
 
 export const verifyEmail = () => `${BASE_URL}/api/user/verify`;
 
+// Auth page URLs (for client-side navigation and redirects)
+export const loginPage = () => `${BASE_URL}/login`;
+export const registerPage = () => `${BASE_URL}/register`;
+
 export const resendVerificationEmail = () => `${BASE_URL}/api/user/verify/resend`;
 
 export const plugins = () => `${BASE_URL}/api/plugins`;