fix(web): prevent superscripts in autocomplete suggestions

[ryukinix]

Problem

When multiple users with identical names configured were rendered in the web user list (producing superscripts, e.g. ), the autocomplete trigger read these strings directly from text contents. This polluted the automatic text insertion with the superscript characters inside the input box.

Solution

• Added attribute to the list item () in to store the original raw username.
• Updated to read from (falling back to if missing) when gathering usernames.

This ensures that while the view looks pretty and displays superscript counters, the autocompleted output only contains clean, valid usernames.