[Task] 마이페이지 기능 추가

### ISSUE
- Group: `client`, `server`, `sr`
- Type: `bug`, `feature`, `delete`
- Detail: fix actions from client redux

### TODO
1. [ ] 마이페이지 브랜드 추가
2. [ ] 마이페이지 브랜드 삭제
3. [ ] 로그인 할경우만 사용가능 구현

### Estimated time
> Pick one

### `3h`

### Labels
- Estimated time: `E: 1h`
- Group : `client`, `server`
- Sprint: `Sprint__NUMBER__`
- Urgency: `High`, `Middle`, `Low`

Start by locating the client Redux actions referenced in the issue and tracing the corresponding server behavior for the my-page brand operations. Done means users can add and delete brands from the my page, while access is restricted to logged-in users; no specific files or tests are named.

Written by the indexing model from the issue text.