refactor(api): Remove '/api' prefix from frontend API calls and config

- Removed '/api/' prefix from endpoint paths in auth.ts, notifications.ts, oauth.ts, and platform.ts to align with the backend URL reconfiguration.
- Updated 'API_BASE_URL' in config.ts to remove the '/api' suffix, ensuring that API requests are correctly routed to the root of the 'api' subdomain (e.g., http://api.lvh.me:8000/).
- Included improvements to login redirect logic in client.ts.

frontend/src/api/auth.ts

@@ -64,7 +64,7 @@ export interface User {
  * Login user
  */
 export const login = async (credentials: LoginCredentials): Promise<LoginResponse> => {
-  const response = await apiClient.post<LoginResponse>('/api/auth/login/', credentials);
+  const response = await apiClient.post<LoginResponse>('/auth/login/', credentials);
   return response.data;
 };
 
@@ -72,14 +72,14 @@ export const login = async (credentials: LoginCredentials): Promise<LoginRespons
  * Logout user
  */
 export const logout = async (): Promise<void> => {
-  await apiClient.post('/api/auth/logout/');
+  await apiClient.post('/auth/logout/');
 };
 
 /**
  * Get current user
  */
 export const getCurrentUser = async (): Promise<User> => {
-  const response = await apiClient.get<User>('/api/auth/me/');
+  const response = await apiClient.get<User>('/auth/me/');
   return response.data;
 };
 
@@ -87,7 +87,7 @@ export const getCurrentUser = async (): Promise<User> => {
  * Refresh access token
  */
 export const refreshToken = async (refresh: string): Promise<{ access: string }> => {
-  const response = await apiClient.post('/api/auth/refresh/', { refresh });
+  const response = await apiClient.post('/auth/refresh/', { refresh });
   return response.data;
 };
 
@@ -99,7 +99,7 @@ export const masquerade = async (
   hijack_history?: MasqueradeStackEntry[]
 ): Promise<LoginResponse> => {
   const response = await apiClient.post<LoginResponse>(
-    '/api/auth/hijack/acquire/',
+    '/auth/hijack/acquire/',
     { user_pk, hijack_history }
   );
   return response.data;
@@ -112,7 +112,7 @@ export const stopMasquerade = async (
   masquerade_stack: MasqueradeStackEntry[]
 ): Promise<LoginResponse> => {
   const response = await apiClient.post<LoginResponse>(
-    '/api/auth/hijack/release/',
+    '/auth/hijack/release/',
     { masquerade_stack }
   );
   return response.data;