fresh start

public/styles.css

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+body { font-family: monospace; background: #f0f0f0; }
+.room { border: 1px solid #ccc; padding: 1em; }
+.exits a { display: block; }
+.chat { border-top: 1px solid #000; margin-top: 1em; }

public/witness.js

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+// Browser-safe Witness Layer: Ephemeral P2P chat (WebRTC stub; full in annex)
+// Use window.crypto for PoW
+
+async function sha256(message) {
+  const msgBuffer = new TextEncoder().encode(message);
+  const hashBuffer = await window.crypto.subtle.digest('SHA-256', msgBuffer);
+  const hashArray = Array.from(new Uint8Array(hashBuffer));
+  return hashArray.map(b => b.toString(16).padStart(2, '0')).join('');
+}
+
+async function computePoW(nonce, difficulty = 4, maxIter = 1e6) {
+  let i = 0;
+  while (i < maxIter) {
+    const hash = await sha256(nonce.toString());
+    if (hash.startsWith('0'.repeat(difficulty))) return nonce;
+    nonce++;
+    i++;
+  }
+  throw new Error('PoW max iterations exceeded');
+}
+
+function initWitness(roomId) {
+  // WebRTC stub with quarantine: No direct storage write
+  const rtcConfig = { iceServers: [{ urls: 'stun:stun.l.google.com:19302' }] }; // Trusted STUN only
+  const peerConnection = new RTCPeerConnection(rtcConfig);
+  const channel = peerConnection.createDataChannel('chat');
+  channel.onmessage = e => {
+    document.getElementById('chat').innerHTML += `<p>${e.data}</p>`;
+  };
+
+  // Bootstrap from Genesis (stub: load aether.json via fetch)
+  fetch('/genesis/aether.json').then(res => res.json()).then(genesis => {
+    console.log('Bootstrapped from Genesis:', genesis);
+    // Signal to peers (annex for full signaling)
+  });
+
+  // Offline mode: localStorage persistence
+  const localState = localStorage.getItem('witness_state') || '{}';
+  console.log('Offline state loaded:', localState);
+
+  // Send with PoW
+  document.getElementById('send').addEventListener('click', async () => {
+    const msg = document.getElementById('msg').value;
+    const nonce = await computePoW(0);
+    const payload = JSON.stringify({ msg, nonce });
+    channel.send(payload);
+    // Persist offline
+    localStorage.setItem('witness_state', JSON.stringify({ lastMsg: msg }));
+  });
+}
+
+// Expose
+window.witness = { connect: initWitness };