Fix API authentication and identity service updates

fix_interceptor.ps1

@@ -0,0 +1,25 @@
+$content = Get-Content -Raw "c:\Users\Lenovo\Desktop\ai_pharma_frontend\src\services\api.ts"
+$target = "}, (error) => {`r`n  return Promise.reject(error);`r`n});"
+$replacement = @"
+}, (error) => {
+  return Promise.reject(error);
+});
+
+// Response interceptor to handle global errors like 401 Unauthorized
+api.interceptors.response.use(
+  (response) => response,
+  (error) => {
+    if (error.response && error.response.status === 401) {
+      // Token is invalid or expired
+      localStorage.removeItem('auth_token');
+      localStorage.removeItem('user');
+      localStorage.removeItem('actor_id');
+      window.location.href = '/login';
+    }
+    return Promise.reject(error);
+  }
+);
+"@
+
+$content = $content.Replace($target, $replacement)
+Set-Content -Path "c:\Users\Lenovo\Desktop\ai_pharma_frontend\src\services\api.ts" -Value $content -NoNewline