Issue Description
The slashed zero in callsigns in Wavelog is a separate character, rather than the 0 character in a slashed-zero font. As a result, it's not possible to use the browser's built-in search on QSOs which are already on-screen.

Version Information

• OS: Debian 13
• PHP: 8.3.25
• MySQL/MariaDB: 11.3.2
• Wavelog: 2.1.1

Steps to Reproduce

1. Go to any page with QSOs on it (logbook, logging, etc.)
2. Open browser search with e.g. Ctrl+F
3. Search for a callsign containing the number 0

Expected Behavior
Callsigns containing 0 should be found.

Screenshots

Desktop Information:

• OS: macOS 26
• Browser: Chrome 142