feat: initialize Annual Gala Interactive System monorepo

- Set up pnpm workspace with 4 packages: shared, server, client-mobile, client-screen
- Implement Redis atomic voting with Lua scripts (HINCRBY + distributed lock)
- Add optimistic UI with IndexedDB queue for offline resilience
- Configure Socket.io with auto-reconnection (infinite retries)
- Separate mobile (Vant) and big screen (Pixi.js) dependencies

Tech stack:
- Frontend Mobile: Vue 3 + Vant + Socket.io-client
- Frontend Screen: Vue 3 + Pixi.js + GSAP
- Backend: Express + Socket.io + Redis + Prisma/MySQL

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

packages/server/src/index.ts

@@ -0,0 +1,55 @@
+import { createServer } from 'http';
+import { app, logger } from './app';
+import { config } from './config';
+import { connectRedis } from './config/redis';
+import { initializeSocket } from './socket';
+import { loadLuaScripts } from './services/vote.service';
+
+async function main(): Promise<void> {
+  try {
+    // Connect to Redis
+    logger.info('Connecting to Redis...');
+    await connectRedis();
+
+    // Load Lua scripts
+    logger.info('Loading Lua scripts...');
+    await loadLuaScripts();
+
+    // Create HTTP server
+    const httpServer = createServer(app);
+
+    // Initialize Socket.io
+    logger.info('Initializing Socket.io...');
+    await initializeSocket(httpServer);
+
+    // Start server
+    httpServer.listen(config.port, () => {
+      logger.info({ port: config.port, env: config.nodeEnv }, 'Server started');
+      logger.info(`Health check: http://localhost:${config.port}/health`);
+    });
+
+    // Graceful shutdown
+    const shutdown = async (signal: string) => {
+      logger.info({ signal }, 'Shutdown signal received');
+
+      httpServer.close(() => {
+        logger.info('HTTP server closed');
+        process.exit(0);
+      });
+
+      // Force exit after 10 seconds
+      setTimeout(() => {
+        logger.error('Forced shutdown after timeout');
+        process.exit(1);
+      }, 10000);
+    };
+
+    process.on('SIGTERM', () => shutdown('SIGTERM'));
+    process.on('SIGINT', () => shutdown('SIGINT'));
+  } catch (error) {
+    logger.error({ error }, 'Failed to start server');
+    process.exit(1);
+  }
+}
+
+main();