Initial commit: Anvil Lounge chat application

- React frontend with Vite + TypeScript
- Cloudflare Worker backend with Durable Objects
- AI-powered chat moderation via OpenAI
- WebSocket-based real-time messaging
- XSS prevention, rate limiting, input validation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/App.css

@@ -0,0 +1,106 @@
+.join-container {
+  flex: 1;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 20px;
+}
+
+.join-card {
+  background: #16213e;
+  border-radius: 12px;
+  padding: 40px;
+  width: 100%;
+  max-width: 400px;
+  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
+}
+
+.join-card h1 {
+  text-align: center;
+  margin-bottom: 8px;
+  color: #e94560;
+}
+
+.join-card > p {
+  text-align: center;
+  color: #888;
+  margin-bottom: 30px;
+}
+
+.nickname-display {
+  margin-bottom: 24px;
+}
+
+.nickname-label {
+  display: block;
+  text-align: center;
+  font-size: 14px;
+  color: #888;
+  margin-bottom: 12px;
+}
+
+.nickname-box {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 12px;
+  background: linear-gradient(135deg, #1a1a2e 0%, #0f3460 100%);
+  border: 2px solid #e94560;
+  border-radius: 12px;
+  padding: 16px 20px;
+}
+
+.nickname {
+  font-size: 20px;
+  font-weight: 700;
+  color: #fff;
+  text-shadow: 0 0 10px rgba(233, 69, 96, 0.5);
+}
+
+.reroll-button {
+  background: rgba(233, 69, 96, 0.2);
+  border: none;
+  border-radius: 8px;
+  padding: 8px 12px;
+  font-size: 20px;
+  cursor: pointer;
+  transition: all 0.2s;
+}
+
+.reroll-button:hover {
+  background: rgba(233, 69, 96, 0.4);
+  transform: rotate(180deg);
+}
+
+.reroll-button:active {
+  transform: rotate(180deg) scale(0.9);
+}
+
+.join-button {
+  width: 100%;
+  padding: 14px;
+  border: none;
+  border-radius: 8px;
+  background: #e94560;
+  color: white;
+  font-size: 16px;
+  font-weight: 600;
+  cursor: pointer;
+  transition: background 0.2s, transform 0.1s;
+}
+
+.join-button:hover {
+  background: #d63a52;
+}
+
+.join-button:active {
+  transform: scale(0.98);
+}
+
+.powered-by {
+  text-align: center;
+  font-size: 12px;
+  color: #555;
+  margin-top: 20px;
+  margin-bottom: 0;
+}