Seamless split: no separate view; 'Include in split view' opens the chat beside the one being read, sidebar picks open in the last used window or glow an open one, closing to one chat returns to the normal view; opaque popovers; tests that actually find React

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@local/dsh-chat-split",
-  "version": "1.1.0",
+  "version": "1.2.0",
   "description": "DSH plugin: several chats side by side in a split view that wraps into a grid, with per-window chat lists, top bars, blue focus glow, include/exclude menu items and a settings preview.",
   "private": true,
   "type": "module",