Initial commit: 5 Why Root Cause Analyzer v1.0.0

Phase 0 & Phase 2 completed:
- Project structure setup
- Environment configuration (.env, .gitignore)
- Enterprise-grade dependencies (bcrypt, helmet, mysql2, etc.)
- Complete database schema with 8 tables + 2 views
- Database initialization scripts
- Comprehensive documentation

Database Tables:
- users (user management with 3-tier permissions)
- analyses (analysis records)
- analysis_perspectives (multi-angle analysis)
- analysis_whys (detailed 5 Why records)
- llm_configs (LLM API configurations)
- system_settings (system parameters)
- audit_logs (security audit trail)
- sessions (session management)

Tech Stack:
- Backend: Node.js + Express
- Frontend: React 18 + Vite + Tailwind CSS
- Database: MySQL 9.4.0
- AI: Ollama API (qwen2.5:3b)

Generated with Claude Code
Co-Authored-By: Claude <noreply@anthropic.com>

config.js

@@ -0,0 +1,102 @@
+import dotenv from 'dotenv';
+import mysql from 'mysql2/promise';
+
+// 載入環境變數
+dotenv.config();
+
+// 資料庫配置
+export const dbConfig = {
+  host: process.env.DB_HOST || 'localhost',
+  port: parseInt(process.env.DB_PORT) || 3306,
+  user: process.env.DB_USER || 'root',
+  password: process.env.DB_PASSWORD || '',
+  database: process.env.DB_NAME || 'db_A102',
+  waitForConnections: true,
+  connectionLimit: 10,
+  queueLimit: 0,
+  enableKeepAlive: true,
+  keepAliveInitialDelay: 0
+};
+
+// 建立連線池
+export const pool = mysql.createPool(dbConfig);
+
+// 測試資料庫連線
+export async function testConnection() {
+  try {
+    const connection = await pool.getConnection();
+    console.log('✅ Database connected successfully');
+    console.log(`   Host: ${dbConfig.host}:${dbConfig.port}`);
+    console.log(`   Database: ${dbConfig.database}`);
+    connection.release();
+    return true;
+  } catch (error) {
+    console.error('❌ Database connection failed:', error.message);
+    return false;
+  }
+}
+
+// 執行查詢的輔助函數
+export async function query(sql, params = []) {
+  try {
+    const [results] = await pool.execute(sql, params);
+    return results;
+  } catch (error) {
+    console.error('Query error:', error.message);
+    throw error;
+  }
+}
+
+// Ollama API 配置
+export const ollamaConfig = {
+  apiUrl: process.env.OLLAMA_API_URL || 'https://ollama_pjapi.theaken.com',
+  model: process.env.OLLAMA_MODEL || 'qwen2.5:3b',
+  maxTokens: 6000,
+  temperature: 0.7,
+  timeout: 120000
+};
+
+// 伺服器配置
+export const serverConfig = {
+  host: process.env.SERVER_HOST || 'localhost',
+  port: parseInt(process.env.SERVER_PORT) || 3001,
+  clientPort: parseInt(process.env.CLIENT_PORT) || 5173
+};
+
+// Session 配置
+export const sessionConfig = {
+  secret: process.env.SESSION_SECRET || 'change-this-secret-key',
+  resave: false,
+  saveUninitialized: false,
+  cookie: {
+    secure: process.env.NODE_ENV === 'production',
+    httpOnly: true,
+    maxAge: 24 * 60 * 60 * 1000 // 24 hours
+  }
+};
+
+// 安全配置
+export const securityConfig = {
+  bcryptRounds: parseInt(process.env.BCRYPT_ROUNDS) || 10,
+  rateLimitMax: parseInt(process.env.RATE_LIMIT_MAX) || 100,
+  rateLimitWindowMs: parseInt(process.env.RATE_LIMIT_WINDOW_MS) || 900000 // 15 minutes
+};
+
+// Gitea 配置
+export const giteaConfig = {
+  url: process.env.GITEA_URL || 'https://gitea.theaken.com/',
+  user: process.env.GITEA_USER || '',
+  token: process.env.GITEA_TOKEN || ''
+};
+
+export default {
+  dbConfig,
+  pool,
+  testConnection,
+  query,
+  ollamaConfig,
+  serverConfig,
+  sessionConfig,
+  securityConfig,
+  giteaConfig
+};