Follow-up of https://github.com/zed-industries/zed/pull/48780 Fixes incorrect multi byte characters treatment in the symbol range when highlighting: <img width="1728" height="507" alt="image" src="https://github.com/user-attachments/assets/c6639220-f08a-4ea8-bf99-926566e356ae" /> Fixes multiple language servers' duplicate data display: <img width="1726" height="925" alt="image" src="https://github.com/user-attachments/assets/ca98ee29-732e-4c8e-adf4-21a9523a5a9c" /> Release Notes: - N/A