[Bug]: Cannot disable automatic screen lock on CachyOS with KDE Plasma 6.6.5

### Kernel

6.18.32-1-cachyos-lts (64-bit)

### Desktop Environment / Window Manager

KDE Plasma

### CPU

8 × Intel® Core™ i7-3770 CPU @ 3.40GHz

### GPU / Driver

NVIDIA GeForce GTX 1050 Ti

### Description

**Product:** kscreenlocker
**Version:** 6.6.5
**Platform:** CachyOS Linux

On a clean install of CachyOS with KDE Plasma 6, the "Lock screen automatically after" toggle in System Settings (Workspace Behavior ➜ Screen Locking) does not function as expected. The system continues to lock the screen after the specified timeout despite the toggle being off.

**System Information:**
* Operating System: CachyOS Linux
* KDE Plasma Version: 6.6.5
* KDE Frameworks Version: 6.26.0
* Qt Version: 6.11.1
* Kernel Version: 6.18.32-1-cachyos-lts (64-bit)
* Graphics Platform: X11
* Graphics Processor: NVIDIA GeForce GTX 1050 Ti

### Steps to Reproduce

1. Open `System Settings ➜ Workspace Behavior ➜ Screen Locking`.
2. Uncheck the box for "Lock screen automatically after".
3. Click "Apply".
4. Wait for the standard timeout period (e.g., 5-10 minutes) without user input.

### Expected Behavior

The screen should remain unlocked after the timeout period.

### Actual Behavior

The screen locks automatically after the timeout period.

### Logs / Error Messages

https://paste.cachyos.org/p/751fe71.log

### Additional Context

The same behavior persists after disabling "Lock after waking from sleep" in Power Management. Toggling the "Manually Block Sleep and Screen Locking" feature in the system tray has no effect, and changing the system's Global Theme does not resolve the issue.