feat(workspace): tabula-rasa outliner architecture, SQLite blocks/block_tags schema & echo-protected live room sync

frontend/package.json

@@ -16,9 +16,7 @@
     "lucide-react": "^0.468.0",
     "prismjs": "^1.30.0",
     "react": "^18.3.1",
-    "react-dom": "^18.3.1",
-    "y-indexeddb": "^9.0.12",
-    "yjs": "^13.6.33"
+    "react-dom": "^18.3.1"
   },
   "devDependencies": {
     "@types/react": "^18.3.12",