feat: desktop app auto updates with automatic, ask first or never modes

env.catalog.json

@@ -442,6 +442,18 @@
       "internal": true,
       "description": "Read on Linux to pick the password store and window behavior."
     },
+    {
+      "name": "APPIMAGE",
+      "group": "desktop",
+      "internal": true,
+      "description": "Set by AppImage. Tells the desktop app it can update itself."
+    },
+    {
+      "name": "FLATPAK_ID",
+      "group": "desktop",
+      "internal": true,
+      "description": "Set by Flatpak. The desktop app links new versions instead of installing them."
+    },
 
     {
       "name": "DESKTOP_SESSION",