momPanel v0.6.1

Fixed

• Linux buttons work again. 0.6.0's transparent: true window broke input and
  produced ghost/stale-frame artifacts on Linux/WebKitGTK (known upstream:
  tauri-apps/tauri#14924, #13157 — the "you can see the About panel behind the sky"
  report was a stale-buffer ghost). Diagnosed on the target machine: spawning
  gnome-control-center/gnome-disks with the app's exact env works fine, so the
  webview, not the backend, was eating the clicks. A new tauri.linux.conf.json
  keeps the window opaque on Linux only; Windows/macOS keep real transparency.

Added

• Simulated see-through on Linux. New desktop_background command returns the
  wallpaper (GNOME picture-uri, Windows registry, macOS System Events) as a data
  URL, cached by path+mtime; supports_transparency tells the frontend which mode
  the OS gets. In companion mode on Linux the wallpaper is drawn as the bottom
  layer, so "clear" skies reveal the desktop — and never other windows. A new
  "Invisible — just the desktop" option (opacity 0, backend clamp now 0.0–1.0)
  shows only the content over the desktop on every platform.
• Peek cards. Hovering a companion health row (Wi-Fi, Printer, Sound, Speed,
  Space, Internet) shows the corresponding classic tile — same renderer, same live
  data, working buttons — as a popover beside the card (200ms intent delay,
  Escape/mouse-away dismiss, reduced-motion honored).
• Ink levels. The printers collector (Linux/macOS) queries the default queue's
  IPP marker attributes via ipptool (pure parse_marker_attrs + fixture tests;
  verified against the real ET-3760: K 49 / C 77 / M 80 / Y 80, low at 15). The
  Printers tile renders per-color ink bars with a "running low" note, and
  companion's Printer row goes amber "Ink low" with a calm attention card.

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Installs and updates automatically from this release. Linux/Zorin: download the AppImage (the self-updating bundle). Windows: run the _x64-setup.exe. macOS: open the .dmg and drag momPanel to Applications; on first launch right-click the app and choose Open (it isn't Apple-notarized yet).