phsl / new-api

Summary
• Added role-specific localStorage keys for column visibility in three hooks:
  - `useUsageLogsData.js` → `logs-table-columns-admin` / `logs-table-columns-user`
  - `useMjLogsData.js`   → `mj-logs-table-columns-admin` / `mj-logs-table-columns-user`
  - `useTaskLogsData.js` → `task-logs-table-columns-admin` / `task-logs-table-columns-user`

Details
1. Each hook now derives a `STORAGE_KEY` based on `isAdminUser`, preventing admin and non-admin sessions from overwriting one another’s column settings.
2. Removed the previous “save but strip admin columns” workaround—settings are persisted unmodified to each role’s key.
3. Kept runtime behaviour: non-admin users still see admin-only columns forcibly hidden.
4. Replaced newly added Chinese comments with clear English equivalents for consistency.

Result
Switching between admin and non-admin accounts no longer corrupts column visibility preferences, and codebase comments are fully English-localized.