Implement P2P polling app with Yjs and WebRTC

Uses Yjs CRDTs for conflict-free shared state and y-webrtc for
peer-to-peer data exchange. Users can add poll options and vote/unvote,
with all changes syncing in real-time across connected peers.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

README.md

@@ -1,40 +1 @@
-# P2P Poll App
+# P2P Poll App
-
-A peer-to-peer polling app where users can add options and vote on them. All data syncs directly between browsers using WebRTC — no central server stores any poll data.
-
-## How It Works
-
-- **Yjs CRDTs** handle shared state — concurrent edits from different peers merge automatically without conflicts
-- **y-webrtc** establishes direct WebRTC connections between browsers (a public signaling server is used only for peer discovery)
-- Each user gets a stable random ID (stored in localStorage) ensuring one vote per user per option
-- Polls are identified by room name, shareable via URL
-
-## Getting Started
-
-```bash
-npm install
-npm run dev
-```
-
-Open `http://localhost:5173` in your browser. To share a specific poll, use the `?room=` query parameter:
-
-```
-http://localhost:5173/?room=my-poll
-```
-
-Share this URL with others to join the same poll.
-
-## Cross-Device Testing
-
-```bash
-npm run dev -- --host
-```
-
-Then open `http://<your-local-ip>:5173/?room=test` on another device on the same network.
-
-## Tech Stack
-
-- [Yjs](https://yjs.dev/) — CRDT library for conflict-free shared state
-- [y-webrtc](https://github.com/yjs/y-webrtc) — WebRTC provider for P2P connectivity
-- [Vite](https://vite.dev/) — Dev server and bundler
-- Vanilla JS — No framework dependencies