feat/OPS-324 : 로그인 분기 수정.

Author: Kimgooner

src/main/java/org/tuna/zoopzoop/backend/domain/auth/handler/OAuth2SuccessHandler.java

@@ -60,10 +60,11 @@ public void onAuthenticationSuccess(HttpServletRequest request, HttpServletRespo
         String accessToken = jwtUtil.generateToken(member);
         String refreshToken = jwtUtil.generateRefreshToken(member);
 
-        String source = request.getParameter("source");
+        String state = request.getParameter("state");
+        boolean isExtension = state != null && state.contains("source:extension");
 
         // 확장 프로그램에서 로그인 했을 경우.
-        if("extension".equals(source)){
+        if(isExtension){
             String redirectUrl = redirect_domain + "/extension/callback "
                     + "?success=true"
                     + "&accessToken=" + URLEncoder.encode(accessToken, "UTF-8")