feat(auth): separate auth and blog API clients and integrate author auto-creation

## Summary
Refactored the authentication flow to correctly separate traffic between the
Auth service and Blog service. Added post-registration author creation and
switched all `/auth/*` calls to the dedicated `auth` Axios client.

## Changes
### AuthProvider
- Replaced `api.post('/auth/register')` with `auth.post('/register')`
- Replaced `api.post('/auth/login')` with `auth.post('/login')`
- Added automatic author creation after user registration (`POST /authors`)
- Switched user identity lookup from `api.get('/auth/me')` to `auth.get('/me')`
- Replaced `/authors/{id}` lookup with `/authors/me`
- Updated imports to use `{ api, auth }`

### Axios Client Layer
- Introduced a new `auth` Axios instance using `VITE_AUTH_BASE_URL`
- Added shared token attachment and 401 handling logic
- Applied interceptors to both `auth` and `api` clients
- Removed inline auth logic from `api.ts`

### Types
- Added `VITE_AUTH_BASE_URL` to `vite-env.d.ts`

## Impact
- Correctly routes authentication traffic to the Auth microservice
- Ensures an Author document is created automatically after registration
- Simplifies identity loading via `/authors/me`
- Improves token handling consistency across both services

src/blog/providers/Author.tsx

@@ -1,5 +1,5 @@
 import React, { createContext, useState, useEffect, useContext } from 'react';
-import { api } from '../utils/api';
+import { api, auth } from '../utils/api';
 import { AuthorModel } from '../types/models';
 import { AuthContextModel } from '../types/contexts';
 
@@ -18,7 +18,14 @@ export const AuthProvider: React.FC<{ children: React.ReactNode }> = ({ children
       setLoading(true);
       setError(null);
 
-      const res = await api.post('/auth/register', { username, password });
+      const res = await auth.post('/register', { username, password });
+
+      // auto-login
+      // await login(username, password);
+
+      // now create author
+      await api.post('/authors', { name: null, avatar: null });
+
       return res.data;
     } catch (err: any) {
       console.error('Registration failed:', err);
@@ -34,7 +41,7 @@ export const AuthProvider: React.FC<{ children: React.ReactNode }> = ({ children
       setLoading(true);
       setError(null);
 
-      const res = await api.post('/auth/login', { username, password });
+      const res = await auth.post('/login', { username, password });
       const { access_token, user } = res.data;
 
       if (access_token) {
@@ -99,9 +106,9 @@ export const AuthProvider: React.FC<{ children: React.ReactNode }> = ({ children
   const fetchCurrentUser = async () => {
     if (!token) return;
     try {
-      const me = await api.get<{ _id: string; username: string; email: string }>('/auth/me');
+      const me = await auth.get('/me');
 
-      const author = await api.get<AuthorModel>(`/authors/${me.data._id}`);
+      const author = await api.get<AuthorModel>(`/authors/me`);
 
       const fullUser = { ...me.data, ...author.data };
 

src/blog/utils/api.ts

@@ -1,8 +1,42 @@
 // src/utils/api.ts
 import axios from 'axios';
 
+const AUTH_BASE = import.meta.env.VITE_AUTH_BASE_URL;
 const API_BASE = import.meta.env.VITE_API_BASE_URL;
 
+//------------------------------------------------------
+// COMMON TOKEN ATTACHMENT LOGIC
+//------------------------------------------------------
+const attachToken = (config: any) => {
+  const token = localStorage.getItem('token');
+  if (token) {
+    config.headers.Authorization = `Bearer ${token}`;
+  }
+  return config;
+};
+
+const handleAuthError = (error: any) => {
+  if (error.response?.status === 401) {
+    console.warn('Token expired or invalid. Logging out...');
+    localStorage.removeItem('token');
+    // Optional: eventBus, redirect, logout callback
+  }
+  return Promise.reject(error);
+};
+
+//------------------------------------------------------
+// AUTH SERVICE CLIENT
+//------------------------------------------------------
+export const auth = axios.create({
+  baseURL: AUTH_BASE,
+  headers: {
+    'Content-Type': 'application/json',
+  },
+});
+
+//------------------------------------------------------
+// BLOG SERVICE CLIENT
+//------------------------------------------------------
 export const api = axios.create({
   baseURL: API_BASE,
   headers: {
@@ -10,24 +44,10 @@ export const api = axios.create({
   },
 });
 
-// 🔹 Attach token from localStorage before each request
-api.interceptors.request.use((config) => {
-  const token = localStorage.getItem('token');
-  if (token) {
-    config.headers.Authorization = `Bearer ${token}`;
-  }
-  return config;
-});
+// Attach token + 401 handling
+api.interceptors.request.use(attachToken);
+api.interceptors.response.use((res) => res, handleAuthError);
 
-// 🔹 Handle expired or invalid tokens globally
-api.interceptors.response.use(
-  (response) => response,
-  (error) => {
-    if (error.response?.status === 401) {
-      console.warn('Token expired or invalid. Logging out...');
-      localStorage.removeItem('token');
-      // Optionally: trigger a redirect or event
-    }
-    return Promise.reject(error);
-  }
-);
+// Auth service ALSO needs token for /me, /logout, /introspect
+auth.interceptors.request.use(attachToken);
+auth.interceptors.response.use((res) => res, handleAuthError);

src/vite-env.d.ts

@@ -2,6 +2,7 @@
 
 interface ImportMetaEnv {
   readonly VITE_API_BASE_URL: string;
+  readonly VITE_AUTH_BASE_URL: string;
 }
 
 interface ImportMeta {