Wallpaper rotation AND night mode rotation broken

### Compositor

Niri

### Distribution

Fedora

### If Other, please specify

_No response_

### Select your Installation Method

DankInstaller

### Was this your original Installation method?

Yes

### If no, specify

_No response_

### dms doctor -vC

Click to expand

dms doctor -v

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System Health Check

──────────────────────────────────────

System
● Operating System ····· Fedora Linux 44 (Workstation Edition)
└─ ID: fedora, Version: 44, Arch: amd64
● Architecture ········· amd64
● Display Server ······· Wayland
└─ WAYLAND_DISPLAY=wayland-1

Versions
● DMS CLI ·············· dms v1.4.6
└─ /usr/bin/dms
● Quickshell ··········· Quickshell 0.3.0 (revision , distributed by Fedora COPR (avengemedia/quickshell))
└─ /usr/bin/qs
● DMS Shell ············ 1.4.6
└─ /usr/share/quickshell/dms

Installation
● DMS Configuration ···· Found
└─ /usr/share/quickshell/dms
● shell.qml ············ Present
└─ /usr/share/quickshell/dms/shell.qml
○ Install Type ········· System package
└─ /usr/share/quickshell/dms

Compositor
● niri ················· 26.04
└─ /usr/bin/niri
○ Active ··············· niri
● Background Blur ······ Supported
└─ Compositor supports ext-background-effect-v1

Quickshell Features
● Polkit ··············· Available
└─ Authentication prompts
● IdleMonitor ·········· Available
└─ Idle detection
● IdleInhibitor ········ Available
└─ Prevent idle/sleep
● ShortcutInhibitor ···· Available
└─ Allow shortcut management (niri)
● BackgroundBlur ······· Available
└─ Background blur API support in Quickshell

Optional Features
● accountsservice ······ Available
└─ User accounts
● power-profiles-daemon Available
└─ Power profile management
● logind ··············· Available
└─ Session management
● cups-pk-helper ······· Available
└─ Printer management
○ I2C/DDC ·············· No monitors detected
└─ External monitor brightness control
● qt6-imageformats ····· Installed (1 formats)
└─ Formats: GIF (/usr/lib64/qt6/plugins/imageformats)
● kimageformats ········ Installed (4 formats)
└─ Formats: AVIF, HEIF, JXL, EXR (/usr/lib64/qt6/plugins/imageformats)
● Terminal ············· ghostty
● Network ·············· NetworkManager
└─ NetworkManager present. Using NM API.
● matugen ·············· Installed
└─ Dynamic theming
● dgop ················· Installed
└─ System monitoring
● cava ················· Installed
└─ Audio visualizer
○ khal ················· Not installed
└─ Calendar events
● danksearch ··········· Installed
└─ File search
● fprintd ·············· Installed
└─ Fingerprint auth

Config Files
● settings.json ········ Present
└─ /home/user/.config/DankMaterialShell/settings.json
○ clsettings.json ······ Not yet created
└─ /home/user/.config/DankMaterialShell/clsettings.json
● plugin_settings.json · Present
└─ /home/user/.config/DankMaterialShell/plugin_settings.json
● session.json ········· Present
└─ /home/user/.local/state/DankMaterialShell/session.json
● dms-colors.json ······ Present
└─ /home/user/.cache/DankMaterialShell/dms-colors.json

Services
● dms.service ·········· enabled, active
○ greetd ··············· Not installed
└─ Optional greeter service

Environment
○ QT_QPA_PLATFORMTHEME · Not set
○ QS_ICON_THEME ········ Not set

──────────────────────────────────────
✓ All checks passed!

### Description

Wallpaper rotation simply doesn't work. It switches when I disable "built-in wallpapers" on the settings page like suggest in a similar issue, but I have to do it manually. Weirdly, the colors will be applied to the bar (theme follows wallpaper), but the wallpaper will not change. After reading similar issues, I've read about symlinked folders being the culprit, so I copied the wallpaper files (not linked anywhere anymore) to ~/.local/share, but the problem persists.

A secondary issue which I think is related is Night Mode not activating on schedule. I have it scheduled to trigger after sunset to sunrise. At the next morning, it seems it knows to turn itself off, but never on. Manually turning it on and off again triggers it, but it's a coin toss if it will trigger on its own or not.

I suspect some scheduling tool used by the shell is broken.

It's a single monitor setup.

### Expected Behavior

Wallpaper rotation work without manual intervention.

Night mode triggering on schedule without manual intervention.

### Steps to Reproduce

1. Turn on wallpaper rotation/night light schedule.
2. Both do not trigger at the correct schedule, but trigger manually via settings.

### Error Messages/Logs

_No response_

### Screenshots/Recordings

_No response_

No source file, test, or entry point is named. Reproduce with wallpaper rotation and the sunset-to-sunrise night-mode schedule enabled, then compare scheduled behavior with manually triggering each setting. Done means both wallpaper changes and night mode activate and deactivate at their configured times without manual intervention.

Written by the indexing model from the issue text.