feat: add lottery results display page

- Add LOTTERY_RESULTS system phase
- Add /screen/lottery-results route
- Add LotteryResultsView component
- Add database connection management (db.ts)
- Update DrawResult schema to remove User relation
- Add awardIcon field to VoteResultsView

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

packages/server/prisma/schema.prisma

@@ -20,7 +20,6 @@ model User {
   updatedAt  DateTime @updatedAt @map("updated_at")
 
   votes       Vote[]
-  drawResults DrawResult[]
 
   @@map("users")
 }
@@ -82,14 +81,12 @@ model DrawResult {
   drawId           String   @map("draw_id")
   prizeLevel       String   @map("prize_level") @db.VarChar(20)
   prizeName        String   @map("prize_name") @db.VarChar(100)
-  winnerId         String   @map("winner_id")
+  winnerId         String   @map("winner_id") @db.VarChar(100)
   winnerName       String   @map("winner_name") @db.VarChar(100)
   winnerDepartment String   @map("winner_department") @db.VarChar(100)
   drawnAt          DateTime @default(now()) @map("drawn_at")
   drawnBy          String   @map("drawn_by") @db.VarChar(100)
 
-  winner User @relation(fields: [winnerId], references: [id])
-
   @@index([drawId])
   @@index([prizeLevel])
   @@index([winnerId])

packages/server/src/config/db.ts

@@ -0,0 +1,51 @@
+/**
+ * Database configuration using Prisma Client
+ */
+import { PrismaClient } from '@prisma/client';
+import { logger } from '../utils/logger';
+
+// Prisma Client instance with logging in development
+export const prisma = new PrismaClient({
+  log: process.env.NODE_ENV === 'development' 
+    ? ['query', 'info', 'warn', 'error']
+    : ['error'],
+});
+
+/**
+ * Connect to database
+ */
+export async function connectDatabase(): Promise<void> {
+  try {
+    await prisma.$connect();
+    logger.info('Database connected successfully');
+  } catch (error) {
+    logger.error({ error }, 'Failed to connect to database');
+    throw error;
+  }
+}
+
+/**
+ * Disconnect from database
+ */
+export async function disconnectDatabase(): Promise<void> {
+  try {
+    await prisma.$disconnect();
+    logger.info('Database disconnected');
+  } catch (error) {
+    logger.error({ error }, 'Error disconnecting from database');
+    throw error;
+  }
+}
+
+/**
+ * Health check for database connection
+ */
+export async function checkDatabaseHealth(): Promise<boolean> {
+  try {
+    await prisma.$queryRaw`SELECT 1`;
+    return true;
+  } catch (error) {
+    logger.error({ error }, 'Database health check failed');
+    return false;
+  }
+}

packages/server/src/index.ts

@@ -2,6 +2,7 @@ import { createServer } from 'http';
 import { app, logger } from './app';
 import { config } from './config';
 import { connectRedis } from './config/redis';
+import { connectDatabase, disconnectDatabase } from './config/db';
 import { initializeSocket } from './socket';
 import { loadLuaScripts } from './services/vote.service';
 import { loadVotingScripts } from './services/voting.engine';
@@ -11,6 +12,10 @@ import { participantService } from './services/participant.service';
 
 async function main(): Promise<void> {
   try {
+    // Connect to Database
+    logger.info('Connecting to Database...');
+    await connectDatabase();
+
     // Connect to Redis
     logger.info('Connecting to Redis...');
     await connectRedis();
@@ -50,6 +55,9 @@ async function main(): Promise<void> {
     const shutdown = async (signal: string) => {
       logger.info({ signal }, 'Shutdown signal received');
 
+      // Disconnect from database
+      await disconnectDatabase();
+
       httpServer.close(() => {
         logger.info('HTTP server closed');
         process.exit(0);