init: 整合项目（dashboard + www + docs）

dashboard/backend/src/config/database.js

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+const { Sequelize } = require('sequelize');
+const { isDevelopment } = require('./env');
+
+const sequelize = new Sequelize(
+  process.env.DATABASE_NAME || 'audio',
+  process.env.DATABASE_USER || 'root',
+  process.env.DATABASE_PASSWORD || 'root123',
+  {
+    host: process.env.DATABASE_HOST || 'localhost',
+    port: parseInt(process.env.DATABASE_PORT || '3306', 10),
+    dialect: 'mysql',
+    dialectOptions: {
+      charset: 'utf8mb4',
+    },
+    logging: isDevelopment ? (msg) => console.log(msg) : false,
+    define: {
+      timestamps: false,
+      freezeTableName: true,
+    },
+  }
+);
+
+module.exports = sequelize;

dashboard/backend/src/config/env.js

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+/**
+ * 统一环境判断工具
+ * 通过 APP_ENV 环境变量区分开发/正式环境
+ *   - development: 本地开发
+ *   - production:  正式环境（Docker 部署）
+ */
+const APP_ENV = (process.env.APP_ENV || 'development').trim().toLowerCase();
+
+const isDevelopment = APP_ENV === 'development';
+const isProduction = APP_ENV === 'production';
+
+module.exports = { APP_ENV, isDevelopment, isProduction };

dashboard/backend/src/config/loadEnv.js

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+/**
+ * 统一从项目根目录加载 .env（dashboard/.env）
+ * - 本地开发：读取根目录 .env
+ * - Docker：由 compose env_file 注入，容器内无 .env 文件，不覆盖已有环境变量
+ */
+const path = require('path');
+const fs = require('fs');
+const dotenv = require('dotenv');
+
+const rootEnvPath = path.resolve(__dirname, '../../../.env');
+
+if (fs.existsSync(rootEnvPath)) {
+  dotenv.config({ path: rootEnvPath });
+}

dashboard/backend/src/config/logger.js

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+const winston = require('winston');
+const path = require('path');
+const fs = require('fs');
+
+const logsDir = path.join(__dirname, '..', '..', 'logs');
+if (!fs.existsSync(logsDir)) {
+  fs.mkdirSync(logsDir, { recursive: true });
+}
+
+const logger = winston.createLogger({
+  level: 'info',
+  format: winston.format.combine(
+    winston.format.timestamp({ format: 'YYYY-MM-DD HH:mm:ss' }),
+    winston.format.printf(({ timestamp, level, message, ...meta }) => {
+      const metaStr = Object.keys(meta).length ? ` ${JSON.stringify(meta)}` : '';
+      return `${timestamp} - ${level} - ${message}${metaStr}`;
+    })
+  ),
+  transports: [
+    new winston.transports.Console(),
+    new winston.transports.File({
+      filename: path.join(logsDir, 'app.log'),
+      encoding: 'utf-8',
+    }),
+  ],
+});
+
+module.exports = logger;

dashboard/backend/src/config/redis.js

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+const Redis = require('ioredis');
+const logger = require('./logger');
+
+const REDIS_HOST = process.env.REDIS_HOST || '127.0.0.1';
+const REDIS_PORT = parseInt(process.env.REDIS_PORT || '6379', 10);
+const REDIS_PASSWORD = process.env.REDIS_PASSWORD || '';
+const REDIS_EQ_DB = parseInt(process.env.REDIS_EQ_DB || '1', 10);
+
+let eqCacheClient = null;
+
+function getEqCacheRedis() {
+  if (!eqCacheClient) {
+    const options = {
+      host: REDIS_HOST,
+      port: REDIS_PORT,
+      db: REDIS_EQ_DB,
+      maxRetriesPerRequest: 2,
+      connectTimeout: 10000,
+    };
+    if (REDIS_PASSWORD) {
+      options.password = REDIS_PASSWORD;
+    }
+    eqCacheClient = new Redis(options);
+    eqCacheClient.on('error', (err) => {
+      logger.error(`Redis EQ cache error: ${err.message}`);
+    });
+  }
+  return eqCacheClient;
+}
+
+module.exports = { getEqCacheRedis };