Add Yjs Collaborative Editing to RichEditor and Fix Editor Teardown Crash

package.json

@@ -232,10 +232,13 @@
     "prepublishOnly": "npm run build"
   },
   "peerDependencies": {
-    "@kerebron/editor": ">=0.7.9",
-    "@kerebron/editor-kits": ">=0.7.9",
-    "@kerebron/wasm": ">=0.7.9",
+    "@kerebron/editor": ">=0.8.6",
+    "@kerebron/editor-kits": ">=0.8.6",
+    "@kerebron/extension-yjs": ">=0.8.6",
+    "@kerebron/wasm": ">=0.8.6",
     "@mieweb/datavis": "=1.6.0",
+    "y-protocols": ">=1.0.6",
+    "yjs": ">=13.6.0",
     "ag-grid-community": ">=32.0.0",
     "ag-grid-react": ">=32.0.0",
     "datavis-ace": "=4.1.0",
@@ -260,9 +263,18 @@
     "@kerebron/editor-kits": {
       "optional": true
     },
+    "@kerebron/extension-yjs": {
+      "optional": true
+    },
     "@kerebron/wasm": {
       "optional": true
     },
+    "y-protocols": {
+      "optional": true
+    },
+    "yjs": {
+      "optional": true
+    },
     "@mieweb/datavis": {
       "optional": true
     },
@@ -341,9 +353,10 @@
     "@esheet/fields": "0.0.3",
     "@esheet/renderer": "0.0.3",
     "@eslint/js": "^9.39.3",
-    "@kerebron/editor": "0.7.9",
-    "@kerebron/editor-kits": "0.7.9",
-    "@kerebron/wasm": "0.7.9",
+    "@kerebron/editor": "^0.8.6",
+    "@kerebron/editor-kits": "^0.8.6",
+    "@kerebron/extension-yjs": "^0.8.6",
+    "@kerebron/wasm": "^0.8.6",
     "@mieweb/datavis": "=1.6.0",
     "@monaco-editor/react": "^4.7.0",
     "@playwright/test": "^1.58.2",
@@ -414,7 +427,9 @@
     "vite": "^7.3.2",
     "vitest": "^3.2.6",
     "wavesurfer.js": "^7.12.1",
+    "y-protocols": "^1.0.6",
     "ychart": "file:./packages/ychart",
+    "yjs": "^13.6.30",
     "zod": "^4.4.3",
     "zustand": "^5.0.14"
   },

patches/@kerebron__extension-codecrock@0.8.9.patch

@@ -0,0 +1,30 @@
+diff --git a/esm/CodeCrock.js b/esm/CodeCrock.js
+index 0daa11c6652a20d9bbd88903d57e67fe456d3f58..73ac9289797951c1901337f8cb062b4adec637f7 100644
+--- a/esm/CodeCrock.js
++++ b/esm/CodeCrock.js
+@@ -457,7 +457,11 @@ export class CodeCrock extends EventTarget {
+         if (typeof root.getSelection === 'function') {
+             return root.getSelection();
+         }
+-        return this.options.window.getSelection();
++        // `options.window` defaults to dnt's globalThis merge-proxy; invoking
++        // a native method with the proxy as `this` throws "Illegal invocation"
++        // (hit when the editor is detached during nodeview init). Call through
++        // the real document instead.
++        return this.options.window.document.getSelection();
+     }
+     uneditable(node) {
+         while (node && node !== this.editor) {
+diff --git a/esm/NodeViewCodeCrock.js b/esm/NodeViewCodeCrock.js
+index 9cb8fb023291070b9269e3b19b5e01e78dd13e86..1d4237fcb7d3a931eb9a32bbe44adefcd732dd3e 100644
+--- a/esm/NodeViewCodeCrock.js
++++ b/esm/NodeViewCodeCrock.js
+@@ -144,6 +144,8 @@ export class NodeViewCodeCrock {
+     addLanguageDropDown() {
+         const select = document.createElement('select');
+         select.classList.add('codecrock-select');
++        // Accessible name for the language picker (axe: select-name).
++        select.setAttribute('aria-label', 'Code language');
+         for (const lang of [''].concat(this.config.languageWhitelist || [])) {
+             const option = document.createElement('option');
+             option.value = lang;