SVG icons needed for breadbar
==============================
24×24 viewBox. Use `currentColor` for all fill/stroke so icons recolour
automatically with the bar theme. Drop finished files in this directory.


Control panel — slider row icons
---------------------------------
Volume.svg
    Speaker / soundwave icon for the volume slider row.
    Currently placeholder: 🔊 emoji label.
    Usage: control panel, left of volume slider.

Brightness.svg
    Sun / light bulb icon for the brightness slider row.
    Currently placeholder: ☀ emoji label.
    Usage: control panel, left of brightness slider.


Power section buttons
-----------------------
Lock.svg
    Padlock icon — triggers breadlock (lock screen).
    Currently placeholder: 🔒

Sleep.svg
    Crescent moon or Zzz icon — triggers systemctl suspend.
    Currently placeholder: 💤

Restart.svg
    Circular arrow icon — triggers systemctl reboot.
    Currently placeholder: 🔄

Shutdown.svg
    Power symbol (⏻) icon — triggers systemctl poweroff.
    Currently placeholder: ⏻


How to wire up icons once SVGs are ready
-----------------------------------------
Each power button and slider row icon is currently a gtk4::Label with an emoji.
To replace with an SVG:

  1. Add the SVG to this directory.
  2. In main.rs, replace the emoji Label with:
       gtk4::Image::from_paintable(Some(&svg_texture(asset!("Icon Name.svg"))))
  3. For slider rows, replace the icon_lbl in build_slider_row() calls,
     or add an overload that takes an image widget instead of a string.