feat: page history diff

package.json

@@ -60,6 +60,7 @@
     "bytes": "^3.1.2",
     "cross-env": "^7.0.3",
     "date-fns": "^4.1.0",
+    "diff": "8.0.3",
     "dompurify": "^3.2.6",
     "fractional-indexing-jittered": "^1.0.0",
     "highlight.js": "^11.11.1",
@@ -70,6 +71,7 @@
     "marked": "13.0.3",
     "ms": "3.0.0-canary.1",
     "qrcode": "^1.5.4",
+    "rfc6902": "5.1.2",
     "uuid": "^11.1.0",
     "y-indexeddb": "^9.0.12",
     "y-prosemirror": "1.3.7",
@@ -98,6 +100,7 @@
     "overrides": {
       "jsdom": "25.0.1",
       "jsonwebtoken": "9.0.3",
+      "prosemirror-changeset": "2.3.1",
       "y-prosemirror": "1.3.7"
     },
     "neverBuiltDependencies": []