niri already owns the org.freedesktop.ScreenSaver interface and feeds its inhibitors into the compositor idle notifier, so hypridle's own registration always fails with 'Another service is already providing...'. Set ignore_dbus_inhibit = true so hypridle no longer tries to claim it; D-Bus inhibits are still handled by niri.
Replace the static hypridle.conf with services.hypridle.settings and add required timeout options so each host tunes its own values:
- idols-ai (PC): 15 min keyboard, 20 min screen-off, 30 min lock.
- 12kingdoms-shoukei (laptop): 3 / 6 / 20 min (previous values).
The options have no defaults because the right values depend on the machine. Update the home-manager eval test to inspect the settings option instead of the old config file text.
Ryan Yin