Hide companion features on mobile

.gitignore

@@ -11,3 +11,6 @@ companion/datascape-companion-*
 
 # Editor build tooling deps (the built bundle is committed; node_modules is not)
 editor-build/node_modules/
+
+AGENTS.md
+CLAUDE.md

CLAUDE.md

@@ -1,7 +0,0 @@
-# CLAUDE.md
-
-I want to understand every line of code that goes into this project. Never create, edit, move, rename, or delete project files unless I explicitly ask you to do so. Instead, show me every proposed edit in the chat so I can type it in manually.
-
-Do not run commands that modify project files, install dependencies, or change repository state unless I explicitly request that action. Instead, show me those commands in the chat so I can run them manually.
-
-I'm an experienced developer. Do not explain syntax, APIs, programming concepts, or implementation details unless explicitly asked.

assets/companion.js

@@ -186,7 +186,19 @@
         });
     }
 
+    function isMobileDevice() {
+        // The companion only ships for Windows and Linux desktops, so skip it
+        // on phones/tablets. Checks the UA and falls back to "touch is the only
+        // pointer" so narrow desktop windows still get the companion.
+        if (/Android|iPhone|iPad|iPod|Mobi/i.test(navigator.userAgent)) return true;
+        return window.matchMedia('(pointer: coarse)').matches &&
+            !window.matchMedia('(any-pointer: fine)').matches;
+    }
+
     function init() {
+        // Every companion element is rendered hidden, so bailing out here
+        // leaves the status icon and reveal buttons invisible on mobile.
+        if (isMobileDevice()) return;
         probeStatus().then(function () {
             updateFooterIcon();
             wireFileLinks();