Merge final group into main (#3 )

2026-05-10 20:10:01 +00:00
27 changed files with 1431 additions and 687 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
-dist
-node_modules
+node_modules
+dist
--- a/PLAN.md
+++ b/PLAN.md
@@ -0,0 +1,102 @@
+# Plan: Combined P2P Polling App
+
+## Overview
+Merge the three subfolder projects into a single TypeScript + Yjs + Vite application at the repo root, combining the best features from each.
+
+## Technology Choices
+- **Language:** TypeScript (from project 3) with strict mode
+- **CRDT:** Yjs + y-webrtc + y-indexeddb (from projects 1 & 3)
+- **Build:** Vite (shared by all)
+- **Package manager:** npm
+
+## Feature Superset
+From **project 1** (group-efa16e66):
+- Collaborative title editing via Y.Text (real-time character-level sync)
+- Delete options
+- Diff-rendering for poll list (reuse DOM elements)
+- Peer count display via awareness
+- Share section with copy-to-clipboard
+
+From **project 2** (proposal-8835ffc9):
+- Deadline/timer system (2-minute voting window with countdown)
+- Duplicate detection (case-insensitive)
+
+From **project 3** (proposal-88461784):
+- TypeScript types & strict mode
+- Modular architecture (state, sync, render, identity, app layers)
+- IndexedDB persistence (offline support)
+- Online/offline connection tracking
+- Input validation (max lengths, empty checks)
+- HTML escaping for XSS prevention
+- ViewModel pattern for clean render layer
+
+## Data Model (Yjs)
+```
+Y.Doc
+├── poll-meta (Y.Map<string>)
+│   └── title → Y.Text (collaborative editing from project 1)
+├── poll-options (Y.Map<OptionRecord>)
+│   └── [optionId] → { id, label, createdAt, createdBy }
+├── poll-votes (Y.Map<string>)
+│   └── [userId] → optionId (single vote per user)
+└── poll-deadline (Y.Map<any>)
+    └── deadline → number | null (timestamp, from project 2)
+```
+
+## Architecture & File Structure
+```
+/
+├── index.html
+├── package.json
+├── tsconfig.json
+├── vite.config.ts          (if needed for any plugins)
+├── src/
+│   ├── main.ts             (entry: mount app)
+│   ├── app.ts              (orchestrator: init sync, bind events, manage state)
+│   ├── identity.ts          (getUserId with localStorage persistence)
+│   ├── state.ts            (types, pure functions, ViewModel creation)
+│   ├── sync.ts             (Yjs doc, WebRTC provider, IndexedDB, connection status)
+│   ├── render.ts           (DOM rendering with escapeHtml, diff-rendering for options)
+│   ├── components/
+│   │   ├── PollTitle.ts    (collaborative title input bound to Y.Text)
+│   │   ├── PollList.ts     (diff-rendered option list with sorting)
+│   │   ├── PollOption.ts   (single option: vote bar, vote/delete buttons)
+│   │   ├── AddOption.ts    (input + submit with validation & duplicate check)
+│   │   ├── StatusBar.ts    (connection status + peer count)
+│   │   ├── ShareSection.ts (copy URL to clipboard)
+│   │   └── DeadlineTimer.ts (set deadline + countdown display, from project 2)
+│   └── styles.css          (merged: project 1's design tokens + project 3's glassmorphism)
+```
+
+## Implementation Steps
+
+### Step 1: Scaffold root project
+- Create `package.json` with dependencies: yjs, y-webrtc, y-indexeddb, vite, typescript
+- Create `tsconfig.json` (strict, ES2022, bundler resolution)
+- Create `index.html` entry point
+- Create `vite.config.ts` if needed
+
+### Step 2: Core layer — identity.ts, state.ts, sync.ts
+- `identity.ts`: port from project 3 (getUserId)
+- `state.ts`: port types from project 3, add deadline types, add ViewModel with deadline/timer info, add vote percentage calculation from project 1
+- `sync.ts`: port from project 3, add Y.Text for title (from project 1), add poll-deadline map, add awareness tracking for peer count (from project 1)
+
+### Step 3: App orchestrator — app.ts, main.ts
+- `app.ts`: port from project 3, add deadline handlers, add delete option handler, wire up all components
+- `main.ts`: minimal entry that calls initApp
+
+### Step 4: Components
+- `PollTitle.ts`: port collaborative Y.Text editing from project 1, add TypeScript types
+- `AddOption.ts`: merge project 1 (UI/animation) + project 2 (duplicate detection) + project 3 (validation)
+- `PollOption.ts`: port from project 1 (vote bar, percentage, delete button), add TypeScript
+- `PollList.ts`: port diff-rendering from project 1, add TypeScript
+- `StatusBar.ts`: merge project 1 (peer count) + project 3 (online/offline status)
+- `ShareSection.ts`: port from project 1, add TypeScript
+- `DeadlineTimer.ts`: new component porting project 2's deadline/countdown logic to Yjs
+
+### Step 5: Styling
+- Merge CSS: use project 1's design tokens and typography as base, incorporate project 3's glassmorphism panel effects, add timer-specific styles from project 2
+
+### Step 6: Cleanup
+- Remove three subfolders (after confirming with user)
+- Update root README.md
--- a/README.md
+++ b/README.md
@@ -1,44 +1,56 @@
-# P2P Poll App
+# Polly - P2P Poll App

-A peer-to-peer polling application where users create and vote on polls without any central server. All data syncs directly between browsers using WebRTC and CRDTs.
+A lightweight, real-time collaborative polling application that uses [Yjs](https://yjs.dev/) and [WebRTC](https://de.wikipedia.org/wiki/WebRTC) to allow multiple users to create options, vote, and see live results without a centralized database or back-end server.

-## Features
+### 🚀 Features

- **Real-time P2P sync** — poll options and votes sync instantly across all connected peers via WebRTC
- **Collaborative poll title** — editable title that syncs between all participants
- **One vote per user** — each peer gets a stable ID, enforcing one vote per person per option
- **Vote/Unvote toggle** — change your mind anytime
- **Connection status** — see when you're connected and how many peers are in the room
- **Shareable polls** — share via URL with `?room=your-poll-name`
- **No backend required** — runs entirely in the browser
+- Real-time Collaboration: Instant synchronization of poll titles, options, and votes across all connected peers using [CRDTs (Conflict-free Replicated Data Types)](https://en.wikipedia.org/wiki/Conflict-free_replicated_data_type).
+- P2P Connectivity: Uses WebRTC via [y-webrtc](https://github.com/yjs/y-webrtc) for direct browser-to-browser communication.
+- Dynamic Voting: * Add new options on the fly.
+    - Live-updating progress bars and vote tallies.
+    - Automatic sorting of options by vote count.
+- Voting Deadline: A shared countdown timer (2 minutes) that locks the poll for all participants once expired.
+- Awareness & Presence: A status bar showing connection health and the number of active peers currently in the room.
+- Local Persistence: Uses [y-indexeddb](https://github.com/yjs/y-indexeddb) to save the poll state locally in your browser, ensuring data isn't lost if you refresh or lose connection.
+- No Setup Required: Unique "rooms" are created via URL parameters, making it easy to share a link and start a poll instantly.

-## Tech Stack
+### 🛠 Tech Stack

- [Yjs](https://yjs.dev/) — CRDT library for conflict-free shared state
- [y-webrtc](https://github.com/yjs/y-webrtc) — WebRTC provider for peer-to-peer connections
- [Vite](https://vitejs.dev/) — Development server and build tool
- Vanilla JavaScript — no framework dependencies
+- Language: TypeScript
+- State Management: Yjs (Shared data types: Y.Doc, Y.Map, Y.Text)
+- Networking: y-webrtc (WebRTC provider for Yjs)
+- UI: Vanilla DOM manipulation (No heavy frameworks like React or Vue)

-## Getting Started
+### 💡 How It Works

-```bash
-npm install
-npm run dev
-```
+- Room Creation: When you open the app, it checks for a ?room= parameter. If none exists, it generates a unique ID and updates the URL.
+- State Synchronization: The y-webrtc provider connects users with the same room ID. Any change to sync.options or sync.votes is propagated to all users.
+- Local Reactivity: Components use .observe() and .observeDeep() on Yjs types to trigger a re-render of the UI whenever the shared state changes.
+- Voting: Votes are stored in a Y.Map<string> where the key is the User ID and the value is the Option ID. This ensures each user can only have one active vote at a time.

-Open `http://localhost:5173/?room=my-poll` in multiple browser tabs to test.
+You can simulate a second user by opening an incognito Tab.

-To test across devices on the same network:
+### 🔧 Installation, Development and Deployment

-```bash
-npm run dev -- --host
-```
+- Install dependencies:

-Then open the URL shown in the terminal on other devices.
+    ```npm install yjs y-webrtc y-indexeddb```

-## How It Works
+- Development:
+    
+    ```npm run dev```

-1. Each browser tab creates a Yjs document and connects to other peers via WebRTC
-2. Poll options and votes are stored in Yjs shared data types (Y.Map)
-3. Changes propagate automatically to all connected peers using CRDTs
-4. A public signaling server handles peer discovery; all poll data flows directly between browsers
+- Deployment:
+    - The code currently uses an Y-Webrtc-Signaling-Server at localhost:4444 that starts with `npm run dev` for development.
+    - To deploy the App, you need to set up a publicly available signaling server and set the address in the `synx.ts`. E.g. with Docker using the [funnyzak/y-webrtc-signaling](https://hub.docker.com/r/funnyzak/y-webrtc-signaling) image:
+
+        ```version: '3.1'
+        services:
+            y-webrtc-signaling:
+                container_name: y-webrtc-signaling
+                image: funnyzak/y-webrtc-signaling:latest
+                restart: always
+                network_mode: bridge
+                ports:
+                - "4444:4444"
+                dns: 8.8.8.8```
--- a/index.html
+++ b/index.html
@@ -1,13 +1,12 @@
-<!DOCTYPE html>
+<!doctype html>
 <html lang="en">
-<head>
-  <meta charset="UTF-8">
-  <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>Polly — P2P Polls</title>
-  <link rel="stylesheet" href="/src/style.css">
-</head>
-<body>
-  <div id="app"></div>
-  <script type="module" src="/src/main.js"></script>
-</body>
-</html>
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>Polly — P2P Polls</title>
+  </head>
+  <body>
+    <div id="app"></div>
+    <script type="module" src="/src/main.ts"></script>
+  </body>
+</html>
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,24 +1,27 @@
 {
-  "name": "p2p-poll",
+  "name": "polly-p2p-poll",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
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        "y-webrtc": "^10.3.0",
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+        "yjs": "^13.6.27"
      },
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      }
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        "node": ">=12.0.0"
@@ -1266,31 +1269,58 @@
        "url": "https://github.com/sponsors/SuperchupuDev"
      }
    },
+    "node_modules/typescript": {
+      "version": "5.9.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
+      "integrity": "sha512-jl1vZzPDinLr9eUt3J/t7V6FgNEw9QjvBPdysz9KfQDD41fQrC2Y4vKQdiaUpFT4bXlb1RHhLpp8wtm6M5TgSw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "tsc": "bin/tsc",
+        "tsserver": "bin/tsserver"
+      },
+      "engines": {
+        "node": ">=14.17"
+      }
+    },
    "node_modules/util-deprecate": {
      "version": "1.0.2",
      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
      "license": "MIT"
    },
+    "node_modules/uuid": {
+      "version": "13.0.2",
+      "resolved": "https://registry.npmjs.org/uuid/-/uuid-13.0.2.tgz",
+      "integrity": "sha512-vzi9uRZ926x4XV73S/4qQaTwPXM2JBj6/6lI/byHH1jOpCzb0zDbfytgA9LcN/hzb2l7WQSQnxITOVx5un/wGw==",
+      "funding": [
+        "https://github.com/sponsors/broofa",
+        "https://github.com/sponsors/ctavan"
+      ],
+      "license": "MIT",
+      "bin": {
+        "uuid": "dist-node/bin/uuid"
+      }
+    },
    "node_modules/vite": {
-      "version": "6.4.1",
-      "resolved": "https://registry.npmjs.org/vite/-/vite-6.4.1.tgz",
-      "integrity": "sha512-+Oxm7q9hDoLMyJOYfUYBuHQo+dkAloi33apOPP56pzj+vsdJDzr+j1NISE5pyaAuKL4A3UD34qd0lx5+kfKp2g==",
+      "version": "7.3.2",
+      "resolved": "https://registry.npmjs.org/vite/-/vite-7.3.2.tgz",
+      "integrity": "sha512-Bby3NOsna2jsjfLVOHKes8sGwgl4TT0E6vvpYgnAYDIF/tie7MRaFthmKuHx1NSXjiTueXH3do80FMQgvEktRg==",
      "dev": true,
      "license": "MIT",
      "dependencies": {
-        "esbuild": "^0.25.0",
-        "fdir": "^6.4.4",
-        "picomatch": "^4.0.2",
-        "postcss": "^8.5.3",
-        "rollup": "^4.34.9",
-        "tinyglobby": "^0.2.13"
+        "esbuild": "^0.27.0",
+        "fdir": "^6.5.0",
+        "picomatch": "^4.0.3",
+        "postcss": "^8.5.6",
+        "rollup": "^4.43.0",
+        "tinyglobby": "^0.2.15"
      },
      "bin": {
        "vite": "bin/vite.js"
      },
      "engines": {
-        "node": "^18.0.0 || ^20.0.0 || >=22.0.0"
+        "node": "^20.19.0 || >=22.12.0"
      },
      "funding": {
        "url": "https://github.com/vitejs/vite?sponsor=1"
@@ -1299,14 +1329,14 @@
        "fsevents": "~2.3.3"
      },
      "peerDependencies": {
-        "@types/node": "^18.0.0 || ^20.0.0 || >=22.0.0",
+        "@types/node": "^20.19.0 || >=22.12.0",
        "jiti": ">=1.21.0",
-        "less": "*",
+        "less": "^4.0.0",
        "lightningcss": "^1.21.0",
-        "sass": "*",
-        "sass-embedded": "*",
-        "stylus": "*",
-        "sugarss": "*",
+        "sass": "^1.70.0",
+        "sass-embedded": "^1.70.0",
+        "stylus": ">=0.54.8",
+        "sugarss": "^5.0.0",
        "terser": "^5.16.0",
        "tsx": "^4.8.1",
        "yaml": "^2.4.2"
@@ -1369,6 +1399,26 @@
        }
      }
    },
+    "node_modules/y-indexeddb": {
+      "version": "9.0.12",
+      "resolved": "https://registry.npmjs.org/y-indexeddb/-/y-indexeddb-9.0.12.tgz",
+      "integrity": "sha512-9oCFRSPPzBK7/w5vOkJBaVCQZKHXB/v6SIT+WYhnJxlEC61juqG0hBrAf+y3gmSMLFLwICNH9nQ53uscuse6Hg==",
+      "license": "MIT",
+      "dependencies": {
+        "lib0": "^0.2.74"
+      },
+      "engines": {
+        "node": ">=16.0.0",
+        "npm": ">=8.0.0"
+      },
+      "funding": {
+        "type": "GitHub Sponsors ❤",
+        "url": "https://github.com/sponsors/dmonad"
+      },
+      "peerDependencies": {
+        "yjs": "^13.0.0"
+      }
+    },
    "node_modules/y-protocols": {
      "version": "1.0.7",
      "resolved": "https://registry.npmjs.org/y-protocols/-/y-protocols-1.0.7.tgz",
--- a/package.json
+++ b/package.json
@@ -1,18 +1,21 @@
 {
-  "name": "p2p-poll",
-  "private": true,
+  "name": "polly-p2p-poll",
  "version": "1.0.0",
+  "private": true,
  "type": "module",
  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
+    "dev": "PORT=4444 npx y-webrtc & vite",
+    "build": "tsc --noEmit && vite build",
    "preview": "vite preview"
  },
  "dependencies": {
-    "yjs": "^13.6.0",
-    "y-webrtc": "^10.3.0"
+    "y-indexeddb": "^9.0.12",
+    "y-webrtc": "^10.3.0",
+    "yjs": "^13.6.27",
+    "uuid": "^13.0.0"
  },
  "devDependencies": {
-    "vite": "^6.0.0"
+    "typescript": "^5.9.2",
+    "vite": "^7.1.5"
  }
 }
--- a/src/app.ts
+++ b/src/app.ts
@@ -0,0 +1,139 @@
+import { getUserId } from "./identity";
+import {
+  addOption,
+  toggleVote,
+  deleteOption,
+  setDeadline,
+  clearDeadline,
+  createViewModel,
+} from "./state";
+import { initSync } from "./sync";
+import { StatusBar } from "./components/StatusBar";
+import { PollTitle } from "./components/PollTitle";
+import { AddOption } from "./components/AddOption";
+import { PollList } from "./components/PollList";
+import { ShareSection } from "./components/ShareSection";
+import { DeadlineTimer } from "./components/DeadlineTimer";
+
+const ROOM_PARAM = "room";
+
+function createRoomId(): string {
+  if (typeof crypto.randomUUID === "function") {
+    return `poll-${crypto.randomUUID().slice(0, 8)}`;
+  }
+  return `poll-${Math.random().toString(36).slice(2, 10)}`;
+}
+
+function ensureRoomId(): string {
+  const url = new URL(window.location.href);
+  let roomId = url.searchParams.get(ROOM_PARAM)?.trim();
+
+  if (!roomId) {
+    roomId = createRoomId();
+    url.searchParams.set(ROOM_PARAM, roomId);
+    window.history.replaceState({}, "", url);
+  }
+
+  return roomId;
+}
+
+export function initApp(container: HTMLElement): () => void {
+  const roomId = ensureRoomId();
+  const userId = getUserId();
+  const sync = initSync(roomId);
+
+  const shareUrl = window.location.href;
+
+  // --- Actions ---
+
+  const actions = {
+    addOption: (label: string) => {
+      const vm = createViewModel(getViewModelParams());
+      if (vm.votingClosed) return;
+      return addOption(sync.options, label, userId);
+    },
+    toggleVote: (optionId: string) => {
+      const vm = createViewModel(getViewModelParams());
+      if (vm.votingClosed) return;
+      toggleVote(sync.votes, userId, optionId);
+    },
+    deleteOption: (optionId: string) => {
+      deleteOption(sync.options, sync.votes, optionId);
+    },
+    startDeadline: (durationMs: number) => {
+      setDeadline(sync.deadlineMap, durationMs);
+    },
+    clearDeadline: () => {
+      clearDeadline(sync.deadlineMap);
+    },
+  };
+
+  function getViewModelParams() {
+    return {
+      yTitle: sync.yTitle,
+      options: sync.options,
+      votes: sync.votes,
+      deadlineMap: sync.deadlineMap,
+      roomId,
+      shareUrl,
+      connectionStatus: sync.getConnectionStatus(),
+      peerCount: sync.getPeerCount(),
+      userId,
+    };
+  }
+
+  // --- Build UI ---
+
+  // Header
+  const header = document.createElement("header");
+  header.className = "app-header";
+
+  const wordmark = document.createElement("div");
+  wordmark.className = "app-wordmark";
+  wordmark.innerHTML = `
+    <svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+      <rect x="2" y="4" width="16" height="2.5" rx="1.25" fill="currentColor"/>
+      <rect x="2" y="8.75" width="11" height="2.5" rx="1.25" fill="currentColor" opacity="0.6"/>
+      <rect x="2" y="13.5" width="13" height="2.5" rx="1.25" fill="currentColor" opacity="0.35"/>
+    </svg>
+    <span>Polly</span>
+  `;
+
+  const statusBar = StatusBar(sync.provider);
+  header.append(wordmark, statusBar);
+
+  // Main card
+  const card = document.createElement("main");
+  card.className = "app-card";
+
+  const pollTitle = PollTitle(sync.doc, sync.yTitle);
+  const addOptionComponent = AddOption((label: string) => {
+    const result = actions.addOption(label);
+    if (result && !result.ok) return result.error;
+    return null;
+  });
+  const pollList = PollList(sync.options, sync.votes, userId, () => {
+    const vm = createViewModel(getViewModelParams());
+    return vm.votingClosed;
+  }, actions.toggleVote, actions.deleteOption);
+  const deadlineTimer = DeadlineTimer(
+    sync.deadlineMap,
+    actions.startDeadline,
+    actions.clearDeadline,
+  );
+
+  card.append(pollTitle, addOptionComponent, deadlineTimer, pollList);
+
+  // Footer
+  const footer = document.createElement("footer");
+  footer.className = "app-footer";
+  footer.appendChild(ShareSection(roomId));
+
+  container.append(header, card, footer);
+
+  // --- Cleanup ---
+
+  return () => {
+    sync.destroy();
+  };
+}
--- a/src/components/AddOption.js
+++ b/src/components/AddOption.js
@@ -1,47 +0,0 @@
-import { addOption } from '../utils/store.js';
-
-export function AddOption() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'add-option-wrapper';
-
-  const input = document.createElement('input');
-  input.type = 'text';
-  input.className = 'add-option-input';
-  input.placeholder = 'Add an option…';
-  input.maxLength = 100;
-  input.setAttribute('aria-label', 'New poll option');
-
-  const btn = document.createElement('button');
-  btn.className = 'add-option-btn';
-  btn.setAttribute('aria-label', 'Add option');
-
-  // Plus icon
-  btn.innerHTML = `
-    <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
-      <path d="M8 2v12M2 8h12" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"/>
-    </svg>
-    <span>Add</span>
-  `;
-
-  wrapper.append(input, btn);
-
-  function submit() {
-    const name = input.value.trim();
-    if (!name) {
-      input.focus();
-      input.classList.add('shake');
-      input.addEventListener('animationend', () => input.classList.remove('shake'), { once: true });
-      return;
-    }
-    addOption(name);
-    input.value = '';
-    input.focus();
-  }
-
-  btn.addEventListener('click', submit);
-  input.addEventListener('keydown', (e) => {
-    if (e.key === 'Enter') submit();
-  });
-
-  return wrapper;
-}
--- a/src/components/AddOption.ts
+++ b/src/components/AddOption.ts
@@ -0,0 +1,66 @@
+export function AddOption(
+  onSubmit: (label: string) => string | null,
+): HTMLElement {
+  const wrapper = document.createElement("div");
+  wrapper.className = "add-option-wrapper";
+
+  const input = document.createElement("input");
+  input.type = "text";
+  input.className = "add-option-input";
+  input.placeholder = "Add an option\u2026";
+  input.maxLength = 100;
+  input.setAttribute("aria-label", "New poll option");
+
+  const btn = document.createElement("button");
+  btn.className = "add-option-btn";
+  btn.setAttribute("aria-label", "Add option");
+  btn.innerHTML = `
+    <svg width="16" height="16" viewBox="0 0 16 16" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
+      <path d="M8 2v12M2 8h12" stroke="currentColor" stroke-width="1.75" stroke-linecap="round"/>
+    </svg>
+    <span>Add</span>
+  `;
+
+  const feedback = document.createElement("div");
+  feedback.className = "add-option-feedback";
+  feedback.setAttribute("aria-live", "polite");
+
+  wrapper.append(input, btn, feedback);
+
+  function submit() {
+    const name = input.value.trim();
+    if (!name) {
+      input.focus();
+      input.classList.add("shake");
+      input.addEventListener("animationend", () => input.classList.remove("shake"), { once: true });
+      return;
+    }
+
+    const error = onSubmit(name);
+    if (error) {
+      feedback.textContent = error;
+      feedback.style.display = "";
+      setTimeout(() => {
+        feedback.textContent = "";
+        feedback.style.display = "none";
+      }, 3000);
+      return;
+    }
+
+    input.value = "";
+    feedback.textContent = "";
+    feedback.style.display = "none";
+    input.focus();
+  }
+
+  btn.addEventListener("click", submit);
+  input.addEventListener("keydown", (e) => {
+    if (e.key === "Enter") submit();
+  });
+  input.addEventListener("input", () => {
+    feedback.textContent = "";
+    feedback.style.display = "none";
+  });
+
+  return wrapper;
+}
--- a/src/components/DeadlineTimer.ts
+++ b/src/components/DeadlineTimer.ts
@@ -0,0 +1,86 @@
+import * as Y from "yjs";
+import { getDeadline } from "../state";
+
+const DEADLINE_DURATION_MS = 2 * 60 * 1000; // 2 minutes
+
+export function DeadlineTimer(
+  deadlineMap: Y.Map<unknown>,
+  onStartDeadline: (durationMs: number) => void,
+  onClearDeadline: () => void,
+): HTMLElement {
+  const wrapper = document.createElement("div");
+  wrapper.className = "deadline-wrapper";
+
+  const timerEl = document.createElement("span");
+  timerEl.className = "deadline-timer";
+
+  const startBtn = document.createElement("button");
+  startBtn.className = "deadline-btn";
+  startBtn.textContent = "Start 2-min vote";
+  startBtn.setAttribute("aria-label", "Start a 2-minute voting deadline");
+
+  const clearBtn = document.createElement("button");
+  clearBtn.className = "deadline-btn deadline-btn--clear";
+  clearBtn.textContent = "Clear";
+  clearBtn.setAttribute("aria-label", "Remove voting deadline");
+
+  wrapper.append(timerEl, startBtn, clearBtn);
+
+  let interval: ReturnType<typeof setInterval> | undefined;
+
+  function render() {
+    const deadline = getDeadline(deadlineMap);
+    const now = Date.now();
+
+    if (deadline === null) {
+      // No deadline set
+      timerEl.textContent = "";
+      timerEl.className = "deadline-timer";
+      startBtn.hidden = false;
+      clearBtn.hidden = true;
+      if (interval) {
+        clearInterval(interval);
+        interval = undefined;
+      }
+      return;
+    }
+
+    startBtn.hidden = true;
+    clearBtn.hidden = false;
+
+    if (now >= deadline) {
+      // Voting closed
+      timerEl.textContent = "Voting closed";
+      timerEl.className = "deadline-timer deadline-timer--closed";
+      if (interval) {
+        clearInterval(interval);
+        interval = undefined;
+      }
+      return;
+    }
+
+    // Counting down
+    const remaining = Math.ceil((deadline - now) / 1000);
+    const mins = Math.floor(remaining / 60);
+    const secs = remaining % 60;
+    timerEl.textContent = `Voting closes in ${mins}:${secs.toString().padStart(2, "0")}`;
+    timerEl.className = "deadline-timer deadline-timer--active";
+
+    if (!interval) {
+      interval = setInterval(() => render(), 1000);
+    }
+  }
+
+  startBtn.addEventListener("click", () => {
+    onStartDeadline(DEADLINE_DURATION_MS);
+  });
+
+  clearBtn.addEventListener("click", () => {
+    onClearDeadline();
+  });
+
+  deadlineMap.observe(() => render());
+  render();
+
+  return wrapper;
+}
--- a/src/components/PollList.js
+++ b/src/components/PollList.js
@@ -1,77 +0,0 @@
-import { yOptions, getEntries, getTotalVotes  } from '../utils/store.js';
-import { PollOption } from './PollOption.js';
-
-export function PollList() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'poll-list-wrapper';
-
-  const meta = document.createElement('div');
-  meta.className = 'poll-list-meta';
-
-  const list = document.createElement('div');
-  list.className = 'poll-list';
-
-  const empty = document.createElement('div');
-  empty.className = 'poll-list-empty';
-  empty.innerHTML = `
-    <div class="empty-icon">
-      <svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
-        <rect x="4" y="10" width="24" height="3" rx="1.5" fill="currentColor" opacity="0.15"/>
-        <rect x="4" y="16" width="18" height="3" rx="1.5" fill="currentColor" opacity="0.1"/>
-        <rect x="4" y="22" width="21" height="3" rx="1.5" fill="currentColor" opacity="0.07"/>
-      </svg>
-    </div>
-    <p>No options yet — add the first one above.</p>
-  `;
-
-  wrapper.append(meta, list, empty);
-
-  function render() {
-    const entries = getEntries();
-    const total = getTotalVotes();
-
-    // Meta line
-    if (entries.length > 0) {
-      meta.textContent = `${entries.length} option${entries.length !== 1 ? 's' : ''} · ${total} vote${total !== 1 ? 's' : ''} total`;
-      meta.style.display = '';
-    } else {
-      meta.style.display = 'none';
-    }
-
-    // Empty state
-    empty.style.display = entries.length === 0 ? '' : 'none';
-
-    // Diff-render: reuse existing rows when possible
-    const existing = new Map(
-      [...list.querySelectorAll('.poll-option')].map((el) => [el.dataset.id, el])
-    );
-
-    // Remove stale rows
-    existing.forEach((el, id) => {
-      if (!entries.find((e) => e.id === id)) el.remove();
-    });
-
-    // Update or insert rows in sorted order
-    entries.forEach((entry, i) => {
-      const newEl = PollOption({ ...entry, totalVotes: total });
-      const currentEl = list.children[i];
-
-      if (!currentEl) {
-        list.appendChild(newEl);
-      } else if (currentEl.dataset.id !== entry.id) {
-        list.insertBefore(newEl, currentEl);
-        // Remove the now-displaced old element if it was this id
-        const old = existing.get(entry.id);
-        if (old && old !== currentEl) old.remove();
-      } else {
-        // Replace in-place so vote bar animation triggers
-        list.replaceChild(newEl, currentEl);
-      }
-    });
-  }
-
-  yOptions.observeDeep(() => render());
-  render();
-
-  return wrapper;
-}
--- a/src/components/PollList.ts
+++ b/src/components/PollList.ts
@@ -0,0 +1,127 @@
+import * as Y from "yjs";
+import type { OptionRecord } from "../state";
+import { PollOption } from "./PollOption";
+
+export function PollList(
+  yOptions: Y.Map<OptionRecord>,
+  yVotes: Y.Map<string>,
+  userId: string,
+  isVotingClosed: () => boolean,
+  onVote: (optionId: string) => void,
+  onDelete: (optionId: string) => void,
+): HTMLElement {
+  const wrapper = document.createElement("div");
+  wrapper.className = "poll-list-wrapper";
+
+  const meta = document.createElement("div");
+  meta.className = "poll-list-meta";
+
+  const list = document.createElement("div");
+  list.className = "poll-list";
+
+  const empty = document.createElement("div");
+  empty.className = "poll-list-empty";
+  empty.innerHTML = `
+    <div class="empty-icon">
+      <svg width="32" height="32" viewBox="0 0 32 32" fill="none" xmlns="http://www.w3.org/2000/svg">
+        <rect x="4" y="10" width="24" height="3" rx="1.5" fill="currentColor" opacity="0.15"/>
+        <rect x="4" y="16" width="18" height="3" rx="1.5" fill="currentColor" opacity="0.1"/>
+        <rect x="4" y="22" width="21" height="3" rx="1.5" fill="currentColor" opacity="0.07"/>
+      </svg>
+    </div>
+    <p>No options yet — add the first one above.</p>
+  `;
+
+  wrapper.append(meta, list, empty);
+
+  function getEntries() {
+    const entries: Array<{
+      id: string;
+      name: string;
+      votes: number;
+      voted: boolean;
+    }> = [];
+
+    // Tally votes per option
+    const tally = new Map<string, number>();
+    for (const optionId of yVotes.values()) {
+      tally.set(optionId, (tally.get(optionId) ?? 0) + 1);
+    }
+
+    const myVote = yVotes.get(userId) ?? null;
+
+    yOptions.forEach((record, id) => {
+      entries.push({
+        id,
+        name: record.label,
+        votes: tally.get(id) ?? 0,
+        voted: myVote === id,
+      });
+    });
+
+    entries.sort((a, b) => b.votes - a.votes || a.name.localeCompare(b.name));
+    return entries;
+  }
+
+  function getTotalVotes(): number {
+    return yVotes.size;
+  }
+
+  function render() {
+    const entries = getEntries();
+    const total = getTotalVotes();
+    const votingClosed = isVotingClosed();
+
+    // Meta line
+    if (entries.length > 0) {
+      meta.textContent = `${entries.length} option${entries.length !== 1 ? "s" : ""} \u00b7 ${total} vote${total !== 1 ? "s" : ""} total`;
+      meta.style.display = "";
+    } else {
+      meta.style.display = "none";
+    }
+
+    // Empty state
+    empty.style.display = entries.length === 0 ? "" : "none";
+
+    // Diff-render: reuse existing rows when possible
+    const existing = new Map(
+      [...list.querySelectorAll<HTMLElement>(".poll-option")].map((el) => [
+        el.dataset.id,
+        el,
+      ]),
+    );
+
+    // Remove stale rows
+    existing.forEach((el, id) => {
+      if (!entries.find((e) => e.id === id)) el.remove();
+    });
+
+    // Update or insert rows in sorted order
+    entries.forEach((entry, i) => {
+      const newEl = PollOption({
+        ...entry,
+        totalVotes: total,
+        votingClosed,
+        onVote,
+        onDelete,
+      });
+      const currentEl = list.children[i] as HTMLElement | undefined;
+
+      if (!currentEl) {
+        list.appendChild(newEl);
+      } else if (currentEl.dataset.id !== entry.id) {
+        list.insertBefore(newEl, currentEl);
+        const old = existing.get(entry.id);
+        if (old && old !== currentEl) old.remove();
+      } else {
+        list.replaceChild(newEl, currentEl);
+      }
+    });
+  }
+
+  yOptions.observeDeep(() => render());
+  yVotes.observe(() => render());
+  render();
+
+  return wrapper;
+}
--- a/src/components/PollOption.ts
+++ b/src/components/PollOption.ts
@@ -1,11 +1,21 @@
-import { toggleVote, deleteOption } from '../utils/store.js';
+import { escapeHtml } from "../state";

-/**
- * @param {{ id: string, name: string, votes: number, voted: boolean, totalVotes: number }} entry
- */
-export function PollOption({ id, name, votes, voted, totalVotes }) {
-  const row = document.createElement('div');
-  row.className = `poll-option${voted ? ' poll-option--voted' : ''}`;
+export interface PollOptionProps {
+  id: string;
+  name: string;
+  votes: number;
+  voted: boolean;
+  totalVotes: number;
+  votingClosed: boolean;
+  onVote: (id: string) => void;
+  onDelete: (id: string) => void;
+}
+
+export function PollOption(props: PollOptionProps): HTMLElement {
+  const { id, name, votes, voted, totalVotes, votingClosed, onVote, onDelete } = props;
+
+  const row = document.createElement("div");
+  row.className = `poll-option${voted ? " poll-option--voted" : ""}`;
  row.dataset.id = id;

  const pct = totalVotes > 0 ? Math.round((votes / totalVotes) * 100) : 0;
@@ -16,9 +26,9 @@ export function PollOption({ id, name, votes, voted, totalVotes }) {
      <span class="poll-option__name">${escapeHtml(name)}</span>
      <div class="poll-option__actions">
        <span class="poll-option__pct">${pct}%</span>
-        <span class="poll-option__count">${votes} vote${votes !== 1 ? 's' : ''}</span>
-        <button class="poll-option__vote-btn" aria-pressed="${voted}">
-          ${voted ? 'Voted' : 'Vote'}
+        <span class="poll-option__count">${votes} vote${votes !== 1 ? "s" : ""}</span>
+        <button class="poll-option__vote-btn" aria-pressed="${voted}"${votingClosed ? " disabled" : ""}>
+          ${voted ? "Voted" : "Vote"}
        </button>
        <button class="poll-option__delete-btn" aria-label="Remove option">
          <svg width="14" height="14" viewBox="0 0 14 14" fill="none" xmlns="http://www.w3.org/2000/svg">
@@ -29,16 +39,8 @@ export function PollOption({ id, name, votes, voted, totalVotes }) {
    </div>
  `;

-  row.querySelector('.poll-option__vote-btn').addEventListener('click', () => toggleVote(id));
-  row.querySelector('.poll-option__delete-btn').addEventListener('click', () => deleteOption(id));
+  row.querySelector(".poll-option__vote-btn")!.addEventListener("click", () => onVote(id));
+  row.querySelector(".poll-option__delete-btn")!.addEventListener("click", () => onDelete(id));

  return row;
 }
-
-function escapeHtml(str) {
-  return str
-    .replace(/&/g, '&amp;')
-    .replace(/</g, '&lt;')
-    .replace(/>/g, '&gt;')
-    .replace(/"/g, '&quot;');
-}
--- a/src/components/PollTitle.js
+++ b/src/components/PollTitle.js
@@ -1,34 +0,0 @@
-import { ydoc, yTitle } from '../utils/store.js';
-
-export function PollTitle() {
-  const wrapper = document.createElement('div');
-  wrapper.className = 'poll-title-wrapper';
-
-  const input = document.createElement('input');
-  input.type = 'text';
-  input.id = 'poll-title';
-  input.className = 'poll-title-input';
-  input.placeholder = 'Untitled Poll';
-  input.maxLength = 120;
-  input.setAttribute('aria-label', 'Poll title');
-  input.value = yTitle.toString();
-
-  wrapper.appendChild(input);
-
-  // Sync from Yjs → input (only when not focused to avoid cursor jump)
-  yTitle.observe(() => {
-    if (document.activeElement !== input) {
-      input.value = yTitle.toString();
-    }
-  });
-
-  // Sync from input → Yjs
-  input.addEventListener('input', () => {
-    ydoc.transact(() => {
-      yTitle.delete(0, yTitle.length);
-      yTitle.insert(0, input.value);
-    });
-  });
-
-  return wrapper;
-}
--- a/src/components/PollTitle.ts
+++ b/src/components/PollTitle.ts
@@ -0,0 +1,34 @@
+import * as Y from "yjs";
+
+export function PollTitle(ydoc: Y.Doc, yTitle: Y.Text): HTMLElement {
+  const wrapper = document.createElement("div");
+  wrapper.className = "poll-title-wrapper";
+
+  const input = document.createElement("input");
+  input.type = "text";
+  input.id = "poll-title";
+  input.className = "poll-title-input";
+  input.placeholder = "Untitled Poll";
+  input.maxLength = 120;
+  input.setAttribute("aria-label", "Poll title");
+  input.value = yTitle.toString();
+
+  wrapper.appendChild(input);
+
+  // Sync from Yjs → input (only when not focused to avoid cursor jump)
+  yTitle.observe(() => {
+    if (document.activeElement !== input) {
+      input.value = yTitle.toString();
+    }
+  });
+
+  // Sync from input → Yjs
+  input.addEventListener("input", () => {
+    ydoc.transact(() => {
+      yTitle.delete(0, yTitle.length);
+      yTitle.insert(0, input.value);
+    });
+  });
+
+  return wrapper;
+}
--- a/src/components/ShareSection.js
+++ b/src/components/ShareSection.js
@@ -1,38 +0,0 @@
-import { roomName } from '../utils/store.js';
-
-export function ShareSection() {
-  const url = `${window.location.origin}${window.location.pathname}?room=${encodeURIComponent(roomName)}`;
-
-  const section = document.createElement('div');
-  section.className = 'share-section';
-
-  section.innerHTML = `
-    <p class="share-label">Share this poll</p>
-    <div class="share-row">
-      <code class="share-url" title="${url}">${url}</code>
-      <button class="share-copy-btn">Copy link</button>
-    </div>
-  `;
-
-  const copyBtn = section.querySelector('.share-copy-btn');
-
-  copyBtn.addEventListener('click', async () => {
-    try {
-      await navigator.clipboard.writeText(url);
-      copyBtn.textContent = 'Copied!';
-      copyBtn.classList.add('share-copy-btn--success');
-      setTimeout(() => {
-        copyBtn.textContent = 'Copy link';
-        copyBtn.classList.remove('share-copy-btn--success');
-      }, 2000);
-    } catch {
-      // Fallback: select the text
-      const range = document.createRange();
-      range.selectNode(section.querySelector('.share-url'));
-      window.getSelection().removeAllRanges();
-      window.getSelection().addRange(range);
-    }
-  });
-
-  return section;
-}
--- a/src/components/ShareSection.ts
+++ b/src/components/ShareSection.ts
@@ -0,0 +1,39 @@
+export function ShareSection(roomName: string): HTMLElement {
+  const url = `${window.location.origin}${window.location.pathname}?room=${encodeURIComponent(roomName)}`;
+
+  const section = document.createElement("div");
+  section.className = "share-section";
+
+  section.innerHTML = `
+    <p class="share-label">Share this poll</p>
+    <div class="share-row">
+      <code class="share-url" title="${url}">${url}</code>
+      <button class="share-copy-btn">Copy link</button>
+    </div>
+  `;
+
+  const copyBtn = section.querySelector<HTMLButtonElement>(".share-copy-btn")!;
+
+  copyBtn.addEventListener("click", async () => {
+    try {
+      await navigator.clipboard.writeText(url);
+      copyBtn.textContent = "Copied!";
+      copyBtn.classList.add("share-copy-btn--success");
+      setTimeout(() => {
+        copyBtn.textContent = "Copy link";
+        copyBtn.classList.remove("share-copy-btn--success");
+      }, 2000);
+    } catch {
+      // Fallback: select the text
+      const range = document.createRange();
+      const urlEl = section.querySelector(".share-url");
+      if (urlEl) {
+        range.selectNode(urlEl);
+        window.getSelection()?.removeAllRanges();
+        window.getSelection()?.addRange(range);
+      }
+    }
+  });
+
+  return section;
+}
--- a/src/components/StatusBar.js
+++ b/src/components/StatusBar.js
@@ -1,50 +0,0 @@
-import { provider } from '../utils/store.js';
-
-export function StatusBar() {
-  const el = document.createElement('div');
-  el.className = 'status-bar';
-
-  const dot = document.createElement('span');
-  dot.className = 'status-dot connecting';
-
-  const statusText = document.createElement('span');
-  statusText.className = 'status-text';
-  statusText.textContent = 'Connecting';
-
-  const divider = document.createElement('span');
-  divider.className = 'status-divider';
-  divider.textContent = '·';
-
-  const peerText = document.createElement('span');
-  peerText.className = 'status-peers';
-
-  el.append(dot, statusText, divider, peerText);
-
-  // --- Connection state ---
-
-  let syncTimeout = setTimeout(() => {
-    statusText.textContent = 'Ready';
-    dot.className = 'status-dot ready';
-  }, 3000);
-
-  provider.on('synced', ({ synced }) => {
-    clearTimeout(syncTimeout);
-    dot.className = `status-dot ${synced ? 'connected' : 'connecting'}`;
-    statusText.textContent = synced ? 'Connected' : 'Connecting';
-  });
-
-  // --- Peer count ---
-
-  function updatePeerCount() {
-    const total = provider.awareness.getStates().size;
-    const others = total - 1;
-    peerText.textContent = others === 0
-      ? 'Only you'
-      : `${others} other${others !== 1 ? 's' : ''}`;
-  }
-
-  provider.awareness.on('change', updatePeerCount);
-  updatePeerCount();
-
-  return el;
-}
--- a/src/components/StatusBar.ts
+++ b/src/components/StatusBar.ts
@@ -0,0 +1,67 @@
+import type { WebrtcProvider } from "y-webrtc";
+
+export function StatusBar(provider: WebrtcProvider): HTMLElement {
+  const el = document.createElement("div");
+  el.className = "status-bar";
+
+  const dot = document.createElement("span");
+  dot.className = "status-dot connecting";
+
+  const statusText = document.createElement("span");
+  statusText.className = "status-text";
+  statusText.textContent = "Connecting";
+
+  const divider = document.createElement("span");
+  divider.className = "status-divider";
+  divider.textContent = "\u00b7";
+
+  const peerText = document.createElement("span");
+  peerText.className = "status-peers";
+
+  el.append(dot, statusText, divider, peerText);
+
+  // --- Connection state ---
+
+  let syncTimeout: ReturnType<typeof setTimeout> | undefined = setTimeout(() => {
+    statusText.textContent = "Ready";
+    dot.className = "status-dot ready";
+  }, 3000);
+
+  provider.on("synced", ({ synced }: { synced: boolean }) => {
+    if (syncTimeout) {
+      clearTimeout(syncTimeout);
+      syncTimeout = undefined;
+    }
+    dot.className = `status-dot ${synced ? "connected" : "connecting"}`;
+    statusText.textContent = synced ? "Connected" : "Connecting";
+  });
+
+  // Online/offline awareness
+  const handleOffline = () => {
+    dot.className = "status-dot connecting";
+    statusText.textContent = "Offline";
+  };
+  const handleOnline = () => {
+    dot.className = "status-dot connecting";
+    statusText.textContent = "Reconnecting";
+  };
+
+  window.addEventListener("offline", handleOffline);
+  window.addEventListener("online", handleOnline);
+
+  // --- Peer count ---
+
+  function updatePeerCount() {
+    const total = provider.awareness.getStates().size;
+    const others = total - 1;
+    peerText.textContent =
+      others === 0
+        ? "Only you"
+        : `${others} other${others !== 1 ? "s" : ""}`;
+  }
+
+  provider.awareness.on("change", updatePeerCount);
+  updatePeerCount();
+
+  return el;
+}
--- a/src/identity.ts
+++ b/src/identity.ts
@@ -0,0 +1,17 @@
+const USER_ID_KEY = "polly:user-id";
+
+function createUserId(): string {
+  if (typeof crypto.randomUUID === "function") {
+    return crypto.randomUUID();
+  }
+  return `user-${Math.random().toString(36).slice(2, 10)}`;
+}
+
+export function getUserId(): string {
+  const existing = localStorage.getItem(USER_ID_KEY);
+  if (existing) return existing;
+
+  const next = createUserId();
+  localStorage.setItem(USER_ID_KEY, next);
+  return next;
+}
--- a/src/main.js
+++ b/src/main.js
@@ -1,41 +0,0 @@
-import { StatusBar } from './components/StatusBar.js';
-import { PollTitle } from './components/PollTitle.js';
-import { AddOption } from './components/AddOption.js';
-import { PollList } from './components/PollList.js';
-import { ShareSection } from './components/ShareSection.js';
-
-const app = document.getElementById('app');
-
-// Header: logo + status
-const header = document.createElement('header');
-header.className = 'app-header';
-
-const wordmark = document.createElement('div');
-wordmark.className = 'app-wordmark';
-wordmark.innerHTML = `
-  <svg width="20" height="20" viewBox="0 0 20 20" fill="none" xmlns="http://www.w3.org/2000/svg" aria-hidden="true">
-    <rect x="2" y="4" width="16" height="2.5" rx="1.25" fill="currentColor"/>
-    <rect x="2" y="8.75" width="11" height="2.5" rx="1.25" fill="currentColor" opacity="0.6"/>
-    <rect x="2" y="13.5" width="13" height="2.5" rx="1.25" fill="currentColor" opacity="0.35"/>
-  </svg>
-  <span>Polly</span>
-`;
-
-header.append(wordmark, StatusBar());
-
-// Main card
-const card = document.createElement('main');
-card.className = 'app-card';
-
-card.append(
-  PollTitle(),
-  AddOption(),
-  PollList(),
-);
-
-// Footer
-const footer = document.createElement('footer');
-footer.className = 'app-footer';
-footer.appendChild(ShareSection());
-
-app.append(header, card, footer);
--- a/src/main.ts
+++ b/src/main.ts
@@ -0,0 +1,9 @@
+import "./styles.css";
+import { initApp } from "./app";
+
+const container = document.querySelector<HTMLElement>("#app");
+if (!container) {
+  throw new Error("App container not found.");
+}
+
+initApp(container);
--- a/src/state.ts
+++ b/src/state.ts
@@ -0,0 +1,207 @@
+import * as Y from "yjs";
+
+// --- Types ---
+
+export type ConnectionStatus = "connecting" | "connected" | "offline";
+
+export interface OptionRecord {
+  id: string;
+  label: string;
+  createdAt: number;
+  createdBy: string;
+}
+
+export interface PollOptionViewModel extends OptionRecord {
+  voteCount: number;
+  isVotedByMe: boolean;
+  percentage: number;
+}
+
+export interface PollViewModel {
+  title: string;
+  roomId: string;
+  shareUrl: string;
+  connectionStatus: ConnectionStatus;
+  peerCount: number;
+  options: PollOptionViewModel[];
+  totalVotes: number;
+  myVoteOptionId: string | null;
+  deadline: number | null;
+  votingClosed: boolean;
+}
+
+// --- Helpers ---
+
+export function createOptionId(): string {
+  if (typeof crypto.randomUUID === "function") {
+    return crypto.randomUUID();
+  }
+  return `option-${Math.random().toString(36).slice(2, 10)}`;
+}
+
+function normalizeLabel(label: string): string {
+  return label.trim().replace(/\s+/g, " ");
+}
+
+export function escapeHtml(value: string): string {
+  return value
+    .replaceAll("&", "&amp;")
+    .replaceAll("<", "&lt;")
+    .replaceAll(">", "&gt;")
+    .replaceAll('"', "&quot;")
+    .replaceAll("'", "&#39;");
+}
+
+// --- Title ---
+
+export function getPollTitle(yTitle: Y.Text): string {
+  const title = yTitle.toString();
+  return title || "Untitled Poll";
+}
+
+// --- Options ---
+
+export function addOption(
+  options: Y.Map<OptionRecord>,
+  rawLabel: string,
+  userId: string,
+): { ok: true; optionId: string } | { ok: false; error: string } {
+  const label = normalizeLabel(rawLabel);
+  if (!label) {
+    return { ok: false, error: "Option cannot be empty." };
+  }
+
+  const normalizedTarget = label.toLocaleLowerCase();
+  const duplicate = Array.from(options.values()).some(
+    (option) => option.label.trim().toLocaleLowerCase() === normalizedTarget,
+  );
+
+  if (duplicate) {
+    return { ok: false, error: "That option already exists." };
+  }
+
+  const option: OptionRecord = {
+    id: createOptionId(),
+    label,
+    createdAt: Date.now(),
+    createdBy: userId,
+  };
+
+  options.set(option.id, option);
+  return { ok: true, optionId: option.id };
+}
+
+export function toggleVote(
+  votes: Y.Map<string>,
+  userId: string,
+  optionId: string,
+): void {
+  const current = votes.get(userId);
+  if (current === optionId) {
+    votes.delete(userId);
+  } else {
+    votes.set(userId, optionId);
+  }
+}
+
+export function deleteOption(
+  options: Y.Map<OptionRecord>,
+  votes: Y.Map<string>,
+  optionId: string,
+): void {
+  options.delete(optionId);
+  // Clean up votes pointing to this option
+  for (const [userId, votedOptionId] of votes.entries()) {
+    if (votedOptionId === optionId) {
+      votes.delete(userId);
+    }
+  }
+}
+
+// --- Deadline ---
+
+export function setDeadline(
+  deadlineMap: Y.Map<unknown>,
+  durationMs: number,
+): void {
+  deadlineMap.set("deadline", Date.now() + durationMs);
+}
+
+export function clearDeadline(deadlineMap: Y.Map<unknown>): void {
+  deadlineMap.delete("deadline");
+}
+
+export function getDeadline(deadlineMap: Y.Map<unknown>): number | null {
+  const val = deadlineMap.get("deadline");
+  return typeof val === "number" ? val : null;
+}
+
+// --- ViewModel ---
+
+export function createViewModel(params: {
+  yTitle: Y.Text;
+  options: Y.Map<OptionRecord>;
+  votes: Y.Map<string>;
+  deadlineMap: Y.Map<unknown>;
+  roomId: string;
+  shareUrl: string;
+  connectionStatus: ConnectionStatus;
+  peerCount: number;
+  userId: string;
+}): PollViewModel {
+  const {
+    yTitle,
+    options,
+    votes,
+    deadlineMap,
+    roomId,
+    shareUrl,
+    connectionStatus,
+    peerCount,
+    userId,
+  } = params;
+
+  // Tally votes per option
+  const tally = new Map<string, number>();
+  for (const optionId of votes.values()) {
+    tally.set(optionId, (tally.get(optionId) ?? 0) + 1);
+  }
+
+  let totalVotes = 0;
+  for (const count of tally.values()) {
+    totalVotes += count;
+  }
+
+  const myVoteOptionId = votes.get(userId) ?? null;
+  const deadline = getDeadline(deadlineMap);
+  const votingClosed = deadline !== null && Date.now() >= deadline;
+
+  // Sort by votes desc, then alphabetically
+  const sortedOptions = Array.from(options.values()).sort((a, b) => {
+    const aVotes = tally.get(a.id) ?? 0;
+    const bVotes = tally.get(b.id) ?? 0;
+    if (bVotes !== aVotes) return bVotes - aVotes;
+    return a.label.localeCompare(b.label);
+  });
+
+  return {
+    title: getPollTitle(yTitle),
+    roomId,
+    shareUrl,
+    connectionStatus,
+    peerCount,
+    myVoteOptionId,
+    totalVotes,
+    deadline,
+    votingClosed,
+    options: sortedOptions.map((option) => ({
+      ...option,
+      voteCount: tally.get(option.id) ?? 0,
+      isVotedByMe: myVoteOptionId === option.id,
+      percentage:
+        totalVotes > 0
+          ? Math.round(((tally.get(option.id) ?? 0) / totalVotes) * 100)
+          : 0,
+    })),
+  };
+}
--- a/src/styles.css
+++ b/src/styles.css
@@ -21,6 +21,7 @@

  --success:        #2D7D46;
  --danger:         #C0392B;
+  --warning:        #8c5300;

  --radius-sm:  6px;
  --radius-md:  10px;
@@ -46,6 +47,9 @@ body {
  -webkit-font-smoothing: antialiased;
 }

+button, input { font: inherit; }
+button { cursor: pointer; }
+
 /* ── Layout ────────────────────────────────────────────── */
 #app {
  max-width: 580px;
@@ -130,6 +134,7 @@ body {
 /* ── Add Option ────────────────────────────────────────── */
 .add-option-wrapper {
  display: flex;
+  flex-wrap: wrap;
  gap: 0.625rem;
  padding: 1.25rem 1.75rem;
  border-bottom: 1px solid var(--border);
@@ -137,9 +142,9 @@ body {

 .add-option-input {
  flex: 1;
+  min-width: 0;
  height: 2.5rem;
  padding: 0 0.875rem;
-  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text-primary);
  background: var(--bg);
@@ -168,14 +173,12 @@ body {
  gap: 0.375rem;
  height: 2.5rem;
  padding: 0 1rem;
-  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--accent-text);
  background: var(--accent);
  border: none;
  border-radius: var(--radius-sm);
-  cursor: pointer;
  transition: opacity 0.15s;
  white-space: nowrap;
 }
@@ -183,6 +186,60 @@ body {
 .add-option-btn:hover { opacity: 0.85; }
 .add-option-btn:active { opacity: 0.7; }

+.add-option-feedback {
+  width: 100%;
+  font-size: 0.8rem;
+  color: var(--danger);
+  display: none;
+}
+
+/* ── Deadline Timer ────────────────────────────────────── */
+.deadline-wrapper {
+  display: flex;
+  align-items: center;
+  gap: 0.75rem;
+  padding: 0.75rem 1.75rem;
+  border-bottom: 1px solid var(--border);
+  font-size: 0.85rem;
+}
+
+.deadline-timer {
+  flex: 1;
+  font-weight: 500;
+}
+
+.deadline-timer--active {
+  color: var(--success);
+}
+
+.deadline-timer--closed {
+  color: var(--danger);
+  font-weight: 600;
+}
+
+.deadline-btn {
+  height: 2rem;
+  padding: 0 0.875rem;
+  font-size: 0.8rem;
+  font-weight: 500;
+  color: var(--text-secondary);
+  background: var(--surface);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  transition: all 0.15s;
+  white-space: nowrap;
+}
+
+.deadline-btn:hover {
+  border-color: var(--accent);
+  color: var(--accent);
+}
+
+.deadline-btn--clear:hover {
+  border-color: var(--danger);
+  color: var(--danger);
+}
+
 /* ── Poll List ─────────────────────────────────────────── */
 .poll-list-wrapper {
  padding: 0.5rem 0;
@@ -276,31 +333,33 @@ body {
 .poll-option__vote-btn {
  height: 1.875rem;
  padding: 0 0.875rem;
-  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
-  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
-
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
 }

-.poll-option__vote-btn:hover {
+.poll-option__vote-btn:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
 }

+.poll-option__vote-btn:disabled {
+  opacity: 0.5;
+  cursor: default;
+}
+
 .poll-option--voted .poll-option__vote-btn {
  background: var(--accent);
  color: var(--accent-text);
  border-color: var(--accent);
 }

-.poll-option--voted .poll-option__vote-btn:hover {
+.poll-option--voted .poll-option__vote-btn:hover:not(:disabled) {
  opacity: 0.8;
 }

@@ -314,7 +373,6 @@ body {
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
-  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s, background 0.15s;
 }
@@ -373,14 +431,12 @@ body {
 .share-copy-btn {
  height: 2rem;
  padding: 0 0.875rem;
-  font-family: var(--font-body);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
-  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
@@ -405,8 +461,9 @@ body {
  .poll-option__content { padding: 0.875rem 1.25rem; }
  .poll-list-meta      { padding: 0.5rem 1.25rem 0.625rem; }
  .poll-list-empty     { padding: 2.5rem 1.25rem; }
+  .deadline-wrapper    { padding: 0.75rem 1.25rem; }

  .poll-option__count  { display: none; }

  .share-section { padding: 1rem 1.25rem; }
-}
+}
--- a/src/sync.ts
+++ b/src/sync.ts
@@ -0,0 +1,79 @@
+import { IndexeddbPersistence } from "y-indexeddb";
+import { WebrtcProvider } from "y-webrtc";
+import * as Y from "yjs";
+
+import type { ConnectionStatus, OptionRecord } from "./state";
+
+export interface AppSync {
+  doc: Y.Doc;
+  yTitle: Y.Text;
+  options: Y.Map<OptionRecord>;
+  votes: Y.Map<string>;
+  deadlineMap: Y.Map<unknown>;
+  provider: WebrtcProvider;
+  persistence: IndexeddbPersistence;
+  getConnectionStatus: () => ConnectionStatus;
+  getPeerCount: () => number;
+  destroy: () => void;
+}
+
+export function initSync(roomId: string): AppSync {
+  const doc = new Y.Doc();
+  const yTitle = doc.getText("poll-title");
+  const options = doc.getMap<OptionRecord>("poll-options");
+  const votes = doc.getMap<string>("poll-votes");
+  const deadlineMap = doc.getMap<unknown>("poll-deadline");
+
+  let connectionStatus: ConnectionStatus = navigator.onLine
+    ? "connecting"
+    : "offline";
+
+  const provider = new WebrtcProvider(roomId, doc,{
+                signaling: ["ws://localhost:4444"]
+            });
+  const persistence = new IndexeddbPersistence(roomId, doc);
+
+  const syncConnectionStatus = (status: ConnectionStatus) => {
+    connectionStatus = navigator.onLine ? status : "offline";
+  };
+
+  const handleOnline = () => {
+    syncConnectionStatus(provider.connected ? "connected" : "connecting");
+  };
+  const handleOffline = () => {
+    connectionStatus = "offline";
+  };
+
+  provider.on("status", (event: { connected: boolean }) => {
+    syncConnectionStatus(event.connected ? "connected" : "connecting");
+  });
+
+  provider.on("synced", ({ synced }: { synced: boolean }) => {
+    if (synced) syncConnectionStatus("connected");
+  });
+
+  window.addEventListener("online", handleOnline);
+  window.addEventListener("offline", handleOffline);
+
+  return {
+    doc,
+    yTitle,
+    options,
+    votes,
+    deadlineMap,
+    provider,
+    persistence,
+    getConnectionStatus: () => connectionStatus,
+    getPeerCount: () => {
+      const total = provider.awareness.getStates().size;
+      return Math.max(0, total - 1);
+    },
+    destroy: () => {
+      window.removeEventListener("online", handleOnline);
+      window.removeEventListener("offline", handleOffline);
+      persistence.destroy();
+      provider.destroy();
+      doc.destroy();
+    },
+  };
+}
--- a/src/utils/store.js
+++ b/src/utils/store.js
@@ -1,79 +0,0 @@
-import * as Y from 'yjs';
-import { WebrtcProvider } from 'y-webrtc';
-
-// --- Peer ID (stable across reloads) ---
-
-function getOrCreatePeerId() {
-  let id = localStorage.getItem('peer-id');
-  if (!id) {
-    id = crypto.randomUUID();
-    localStorage.setItem('peer-id', id);
-  }
-  return id;
-}
-
-// --- Room name from URL ---
-
-function getRoomName() {
-  const params = new URLSearchParams(window.location.search);
-  return params.get('room') || 'default-poll';
-}
-
-// --- Yjs setup ---
-
-export const peerId = getOrCreatePeerId();
-export const roomName = getRoomName();
-
-export const ydoc = new Y.Doc();
-export const provider = new WebrtcProvider(roomName, ydoc);
-export const yOptions = ydoc.getMap('poll-options');
-export const yTitle = ydoc.getText('poll-title');
-
-// --- Data operations ---
-
-export function addOption(name) {
-  const id = crypto.randomUUID();
-  const optionMap = new Y.Map();
-  optionMap.set('name', name);
-  optionMap.set('votes', new Y.Map());
-  yOptions.set(id, optionMap);
-}
-
-export function toggleVote(optionId) {
-  const optionMap = yOptions.get(optionId);
-  if (!optionMap) return;
-  const votes = optionMap.get('votes');
-  if (votes.has(peerId)) {
-    votes.delete(peerId);
-  } else {
-    votes.set(peerId, true);
-  }
-}
-
-export function deleteOption(optionId) {
-  yOptions.delete(optionId);
-}
-
-// --- Derived read helpers ---
-
-export function getEntries() {
-  const entries = [];
-  yOptions.forEach((optionMap, id) => {
-    entries.push({
-      id,
-      name: optionMap.get('name'),
-      votes: optionMap.get('votes').size,
-      voted: optionMap.get('votes').has(peerId),
-    });
-  });
-  entries.sort((a, b) => b.votes - a.votes || a.name.localeCompare(b.name));
-  return entries;
-}
-
-export function getTotalVotes() {
-  let total = 0;
-  yOptions.forEach((optionMap) => {
-    total += optionMap.get('votes').size;
-  });
-  return total;
-}
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,15 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "lib": ["DOM", "DOM.Iterable", "ES2022"],
+    "strict": true,
+    "noEmit": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "allowSyntheticDefaultImports": true,
+    "useDefineForClassFields": true
+  },
+  "include": ["src"]
+}