lock: enable parallel fprintd unlocks

[CLEMENTINATOR]

Summary

lockscreen: parallel fingerprint and password input

Motivation

Discussion on discord. User (and I) had to press enter to unlock the session with a fingerprint reader.
Took example on hyprlock for the implementation.

Type of Change

• Bug fix
• New feature
• Breaking change
• Refactoring
• Build / packaging

Related Issue

Testing

Manual Coverage

• Tested on Niri
• [] Tested on Hyprland
• [] Tested on Sway
• [] Tested on another compositor:
• [] Tested with different bar positions and density settings
• [] Tested at different interface scaling values
• Tested with multiple monitors

Screenshots / Videos

Checklist

• This PR is ready for review, or it is marked as Draft.
• I read and followed the relevant guidance in CONTRIBUTING.md.
• I ran just format with clang-format v22+ installed, or this PR has no code changes.
• I ran the relevant build or test commands, or explained why they were not run.
• I self-reviewed the changes.
• I checked for new warnings or errors.
• I will update end-user documentation after merge, or this PR does not change user-facing configuration or behavior.
• I added or updated assets/translations/en.json, or this PR adds no new user-facing strings.
• I did not edit non-English translation files unless this PR is explicitly for translation tooling, an import/export sync, or a maintainer-requested locale change.
• I used the existing canonical names for config keys, IPC names, paths, and identifiers.

Additional Notes

Just need to test it on a non fingerprint system to make sure it doesn't break anything.

[ItsLemmy]

Test without finger print and it works, merging and hoping for the best.

[ItsLemmy]

made a tiny change over it, let me know if that still works for you.

[CLEMENTINATOR]

made a tiny change over it, let me know if that still works for you.

lkooks still good !