[onuralpszr]

Summary

Adds a Kirigami page under System Settings, backed by a small C++ plugin (Qt6 and KDE Frameworks 6) that talks to gazed over D-Bus, that lists, adds, renames and deletes faces with a live camera preview, tests authentication, and edits every Gaze setting behind a polkit unlock, with a Restart Service button. The RPM gaze-kde package ships it in place of the gaze-gui launcher, and a Gaze Settings launcher opens it in its own window. Only the RPM package ships the page for now: deb and Arch keep the old Face Unlock entry because their package builds have no KDE Frameworks 6 development files, Flatpak is unchanged because a sandboxed app cannot add a System Settings plugin, and Nix is unchanged because the NixOS module only mirrors the lock screen PAM setup and has no package to carry the page.

Related issues

Closes #343.

Type of change

• New feature
• Packaging, install, or uninstall
• CI or build tooling

Areas touched

• KDE Plasma integration
• Packaging, systemd units, or polkit policy
• Docs

Verification

Required checks. All jobs on this PR are green: Format, Lint, Test, Audit, Build, KDE, GNOME, Nix, and the deb, archlinux, Fedora rpm, openSUSE rpm, srpm and flatpak package jobs. Locally node scripts/test-kde.mjs passes 160 of 160, and the Fedora gaze-kde RPM builds with nfpm.

Tests.

• Added or updated tests for the changed behavior
• Not testable in CI without hardware or system services, manual steps are below. The settings logic and the face list model have Qt tests (just test-kcm), and enrollment, Test, unlock and restart need a camera or the running daemon.

Manual verification. Tested on Fedora, Plasma 6.7.5, Intel NPU laptop. Open System Settings, find Gaze under System Administration, unlock with the administrator password, enroll, rename and delete a face, run Test, switch the security level to Custom, change the OpenVINO device between cpu and npu, then press Restart Service. Result: the changes save, the service restarts and the page reloads.

Licensing

• New files carry the SPDX header used throughout the tree
• No code was copied from a project whose license is incompatible with GPL-3.0-or-later
• Any new dependency is license-compatible and I checked it myself, since just audit does not. The only new dependencies are Qt6 and KF6 libraries (LGPL or GPL compatible), linked dynamically from the distro, and there are no new Cargo crates.
• I agree that my contribution is licensed under GPL-3.0-or-later

Follow-ups and known limitations

This is the first C++ code in the repo, so just fmt-check, just lint and just audit do not cover it, and only the CMake build in the RPM jobs does. The openSUSE package names for the KF6 build dependencies were only confirmed by the CI job, and I did not try a Copr build(Because I build locally so I can repro RPM spec) or a Nix build. deb, Arch, Flatpak and Nix do not get the page yet.

AI disclosure

• Assisted. AI helped docs prose, certain quick small test and couple of naming. I mostly used a small local LLM to ask certain types and rest of the code written by hand
• Tools is local llama.cpp + qwen and gemma model to quick check and ask and some better english typing for docs section

Screenshots

[onuralpszr]

Hello @pranavgundu I know that PR is slightly large but I wanted to have complete sense of experience and try to follow GNOME UI as much as possible to making sure they we have same experience and nothing left out. I hope it will be added because this would be huge for KDE side maybe one comment I would see not "system kcm" category but security would be better but I didn't touch it. Anyway if you want to you can do changes as well but generally now have proper Kirigami/KDE based on UI and KCM (system settings plugin) too :)

[pranavgundu]

Can you please follow the PR template?

[onuralpszr]

Can you please follow the PR template?

Done

[pranavgundu]

Can you fill in the AI disclosure section?

[onuralpszr]

Can you fill in the AI disclosure section?

I added it.