Add Open WebUI desktop entry; enable in home

- Move openWebUI.enable from system-modules to home‑modules for desktop
  and laptop hosts
- Remove flatpak entry for OpenWebUI
- Add XDG desktop entry and bind Super‑Ctrl‑O to launch it via dex
- Update Helium appimage to version 0.14.2.1 with new checksum

modules/core/flatpak.nix

@@ -16,7 +16,6 @@
     flatseal = "com.github.tchx84.Flatseal";
     upscaler = "io.gitlab.theevilskeleton.Upscaler";
     arduino = "cc.arduino.IDE2";
-    openWebUI = "com.openwebui.open-webui";
   };
 in {
   options.flatpak.enable = lib.mkEnableOption "Flatpak";

modules/core/packages/appimages/helium.nix

@@ -4,8 +4,8 @@
   fetchurl,
 }: let
   pname = "helium";
-  version = "0.13.5.1";
-  hash = "sha256-VAncL78nyXRRNUPZ2c0QudxFrfxy7tXE2NFN4teeezk=";
+  version = "0.14.2.1";
+  hash = "sha256-JQQ5K+WUZ3ly5mklNPGZWDTlq+mJqqS02oJgC3in5U0=";
 
   src = fetchurl {
     url = "https://github.com/imputnet/helium-linux/releases/download/${version}/helium-${version}-x86_64.AppImage";

modules/home/hyprland/binds.nix

@@ -69,7 +69,7 @@
     "SUPER CONTROL, G, exec, gimp #\"GNU Image Manipulation Program\""
     "SUPER CONTROL, M, exec, mattermost-desktop #\"Mattermost team chat client\""
     "SUPER CONTROL, N, exec, noctalia-shell ipc call plugin:ntfy-notifications refresh #\"Refresh ntfy\""
-    "SUPER CONTROL, O, exec, flatpak run com.openwebui.open-webui #\"My own AI chat interface\""
+    "SUPER CONTROL, O, exec, dex ${desktopEntriesPath}/openWebUI.desktop #\"My own AI chat interface\""
     "SUPER CONTROL, R, exec, noctalia-shell ipc call plugin:screen-recorder toggle #\"Toogle screen recording\""
     "SUPER CONTROL, S, exec, signal-desktop #\"Signal encrypted messaging\""
     "SUPER CONTROL, T, exec, tsukimi #\"A simple Emby/Jellyfin Client\""

modules/home/xdg/desktop-entries.nix

@@ -69,6 +69,13 @@
       iconUrl = "https://jellyfin.org/images/logo.svg";
       iconSha = "sha256-sRSB2rxThd4+vMmdpRTz+bEKgdrmF5NG4I74I6kfCyY=";
     }
+    {
+      name = "openWebUI";
+      displayName = "Open WebUI";
+      url = "https://ai.garandplg.com";
+      iconUrl = "https://ai.garandplg.com/static/favicon.png";
+      iconSha = "sha256-Vpij45UT57YwTslsMJNzqzrw9w/nlCk0Yd45WpTeqmU=";
+    }
   ];
 in {
   options.xdgDesktopEntries = {