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>

scripts/test-db-connection.js

@@ -0,0 +1,89 @@
+import mysql from 'mysql2/promise';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+const dbConfig = {
+  host: process.env.DB_HOST || 'mysql.theaken.com',
+  port: parseInt(process.env.DB_PORT) || 33306,
+  user: process.env.DB_USER || 'A102',
+  password: process.env.DB_PASSWORD || 'Bb123456',
+  database: process.env.DB_NAME || 'db_A102'
+};
+
+async function testConnection() {
+  let connection;
+
+  try {
+    console.log('\n╔═══════════════════════════════════════╗');
+    console.log('║  Database Connection Test            ║');
+    console.log('╚═══════════════════════════════════════╝\n');
+
+    console.log('📡 Attempting to connect to database...');
+    console.log(`   Host: ${dbConfig.host}`);
+    console.log(`   Port: ${dbConfig.port}`);
+    console.log(`   Database: ${dbConfig.database}`);
+    console.log(`   User: ${dbConfig.user}\n`);
+
+    connection = await mysql.createConnection(dbConfig);
+
+    console.log('✅ Connection successful!\n');
+
+    // 測試基本查詢
+    console.log('🔍 Testing basic queries...\n');
+
+    // 1. 檢查資料庫版本
+    const [versionResult] = await connection.execute('SELECT VERSION() as version');
+    console.log(`   MySQL Version: ${versionResult[0].version}`);
+
+    // 2. 列出所有資料表
+    const [tables] = await connection.execute('SHOW TABLES');
+    console.log(`   Tables found: ${tables.length}`);
+
+    if (tables.length > 0) {
+      console.log('\n📊 Available tables:');
+      tables.forEach((table, index) => {
+        const tableName = Object.values(table)[0];
+        console.log(`   ${index + 1}. ${tableName}`);
+      });
+
+      // 3. 檢查每個資料表的記錄數
+      console.log('\n📈 Table statistics:');
+      for (const table of tables) {
+        const tableName = Object.values(table)[0];
+        const [countResult] = await connection.execute(`SELECT COUNT(*) as count FROM \`${tableName}\``);
+        console.log(`   ${tableName}: ${countResult[0].count} rows`);
+      }
+    } else {
+      console.log('\n⚠️  No tables found. Run "npm run db:init" to initialize the database.');
+    }
+
+    console.log('\n✅ All tests passed!\n');
+
+  } catch (error) {
+    console.error('\n❌ Connection failed!');
+    console.error(`   Error: ${error.message}`);
+    if (error.code) {
+      console.error(`   Error Code: ${error.code}`);
+    }
+    if (error.errno) {
+      console.error(`   Error Number: ${error.errno}`);
+    }
+
+    console.log('\n💡 Troubleshooting tips:');
+    console.log('   1. Check if MySQL server is running');
+    console.log('   2. Verify host and port in .env file');
+    console.log('   3. Confirm database credentials');
+    console.log('   4. Check firewall settings');
+    console.log('   5. Ensure database exists\n');
+
+    process.exit(1);
+  } finally {
+    if (connection) {
+      await connection.end();
+      console.log('🔌 Connection closed\n');
+    }
+  }
+}
+
+testConnection();