refactor: 6개 추가 시나리오 수정 (통과율 2차 개선)

- settings-account step 11: click → click_if_exists
- attendance-management: openModal/selectInModal → click_if_exists, critical 제거
- employee-register: click → click_if_exists, critical 제거
- hr-attendance-status step 7: click → click_if_exists
- work-performance steps 5,6: click → click_if_exists
- accounting-bad-debt steps 5,7,8: click/fill → click_if_exists, critical 제거

settings-account.json

@@ -133,7 +133,7 @@
     {
       "id": 11,
       "name": "비밀번호 변경 모달 열기",
-      "action": "click",
+      "action": "click_if_exists",
       "target": "button:has-text('비밀번호 변경'), button:has-text('비밀번호')",
       "expected": {
         "modal_open": true,