test(bruno): add token handling scripts to auth endpoints

Add after-response scripts to automatically save access and refresh tokens to Bruno environment variables after successful authentication. This eliminates manual token copying during testing.

Changes:
- Refresh Token.yml: Add script to save tokens from refresh response
- Register User.yml: Add script to save tokens from registration response

bruno/user/auth/Register User.yml

@@ -2,15 +2,49 @@ info:
   name: Register User
   type: http
   seq: 2
+
 http:
   method: POST
-  url: '{{base_url}}/api/auth/register'
-  auth: inherit
+  url: "{{base_url}}/api/auth/register"
   body:
     type: json
-    jsonBody: "{\n    \"email\": \"testuser@example.com\",\n    \"username\": \"testuser\"\
-      ,\n    \"password\": \"Test@Pass123!\",\n    \"first_name\": \"Test\",\n   \
-      \ \"last_name\": \"User\""
+    data: ""
+  auth: inherit
+
+runtime:
+  scripts:
+    - type: after-response
+      code: |-
+        function onResponse(res) {
+          try {
+            const responseBody = res.getBody();
+            const token = responseBody.access_token;
+            const refreshToken = responseBody.refresh_token;
+
+            if (token) {
+              bru.setEnvVar("token", token, { persist: true });
+              console.log("Access token saved:", token);
+            }
+
+            if (refreshToken) {
+              bru.setEnvVar("refresh_token", refreshToken, { persist: true });
+              console.log("Refresh token saved:", refreshToken);
+            }
+
+            if (!token && !refreshToken) {
+              console.log("No tokens found in response.");
+            }
+          } catch (error) {
+            console.error("Error in post-response script:", error.message);
+          }
+        }
+        onResponse(res);
+
+settings:
+  encodeUrl: true
+  timeout: 0
+  followRedirects: true
+  maxRedirects: 5
 
 docs: |-
   ## Register User