fix: Add localhost host binding to Vite config and index fix script

- Add host: 'localhost' to vite.config.js to ensure consistent IP - Add scripts/fix-indexes.js for database index verification - Add routes/llmTest.js for LLM testing endpoint 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
feat: Add 5Why_ prefix to all database tables
2025-12-09 18:28:29 +08:00 · 2025-12-09 18:19:53 +08:00
12 changed files with 976 additions and 62 deletions
--- a/docs/db_schema.sql
+++ b/docs/db_schema.sql
@@ -0,0 +1,227 @@
+-- 5 Why Analyzer Database Schema
+-- Database: db_A102
+-- Version: 1.1.0
+-- Created: 2025-12-05
+-- Updated: 2025-12-09 (Added 5Why_ prefix to all tables)
+
+USE db_A102;
+
+-- ============================================
+-- Table: 5Why_users (使用者資料表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_users (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    employee_id VARCHAR(50) UNIQUE NOT NULL COMMENT '工號',
+    username VARCHAR(100) NOT NULL COMMENT '使用者名稱',
+    email VARCHAR(255) UNIQUE NOT NULL COMMENT 'Email',
+    password_hash VARCHAR(255) NOT NULL COMMENT '密碼雜湊',
+    role ENUM('user', 'admin', 'super_admin') DEFAULT 'user' COMMENT '權限等級',
+    department VARCHAR(100) COMMENT '部門',
+    position VARCHAR(100) COMMENT '職位',
+    is_active BOOLEAN DEFAULT TRUE COMMENT '帳號啟用狀態',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時間',
+    last_login_at TIMESTAMP NULL COMMENT '最後登入時間',
+    INDEX idx_employee_id (employee_id),
+    INDEX idx_email (email),
+    INDEX idx_role (role)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='使用者資料表';
+
+-- ============================================
+-- Table: 5Why_analyses (分析記錄表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_analyses (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT NOT NULL COMMENT '使用者ID',
+    finding TEXT NOT NULL COMMENT 'Finding描述',
+    job_content TEXT NOT NULL COMMENT '工作內容',
+    output_language VARCHAR(10) NOT NULL DEFAULT 'zh-TW' COMMENT '輸出語言',
+    problem_restatement TEXT COMMENT '問題重述（5W1H）',
+    analysis_result JSON COMMENT '完整分析結果（JSON格式）',
+    status ENUM('pending', 'processing', 'completed', 'failed') DEFAULT 'pending' COMMENT '分析狀態',
+    error_message TEXT COMMENT '錯誤訊息',
+    processing_time INT COMMENT '處理時間（秒）',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時間',
+    FOREIGN KEY (user_id) REFERENCES 5Why_users(id) ON DELETE CASCADE,
+    INDEX idx_user_id (user_id),
+    INDEX idx_status (status),
+    INDEX idx_created_at (created_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='分析記錄表';
+
+-- ============================================
+-- Table: 5Why_analysis_perspectives (分析角度詳細表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_analysis_perspectives (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    analysis_id INT NOT NULL COMMENT '分析記錄ID',
+    perspective VARCHAR(100) NOT NULL COMMENT '分析角度（流程面、系統面等）',
+    perspective_icon VARCHAR(10) COMMENT 'Emoji圖示',
+    root_cause TEXT COMMENT '根本原因',
+    permanent_solution TEXT COMMENT '永久性對策',
+    logic_check_forward TEXT COMMENT '順向邏輯檢核',
+    logic_check_backward TEXT COMMENT '逆向邏輯檢核',
+    logic_valid BOOLEAN DEFAULT TRUE COMMENT '邏輯是否有效',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    FOREIGN KEY (analysis_id) REFERENCES 5Why_analyses(id) ON DELETE CASCADE,
+    INDEX idx_analysis_id (analysis_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='分析角度詳細表';
+
+-- ============================================
+-- Table: 5Why_analysis_whys (5 Why詳細記錄表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_analysis_whys (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    perspective_id INT NOT NULL COMMENT '分析角度ID',
+    level INT NOT NULL COMMENT 'Why層級（1-5）',
+    question TEXT NOT NULL COMMENT '問題',
+    answer TEXT NOT NULL COMMENT '答案',
+    is_verified BOOLEAN DEFAULT FALSE COMMENT '是否已驗證',
+    verification_note TEXT COMMENT '驗證說明',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    FOREIGN KEY (perspective_id) REFERENCES 5Why_analysis_perspectives(id) ON DELETE CASCADE,
+    INDEX idx_perspective_id (perspective_id),
+    INDEX idx_level (level)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='5 Why詳細記錄表';
+
+-- ============================================
+-- Table: 5Why_llm_configs (LLM API配置表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_llm_configs (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    provider VARCHAR(50) NOT NULL COMMENT 'LLM提供商（ollama, gemini, deepseek, openai）',
+    api_url VARCHAR(255) COMMENT 'API URL',
+    api_key VARCHAR(255) COMMENT 'API Key（加密儲存）',
+    model_name VARCHAR(100) COMMENT '模型名稱',
+    is_active BOOLEAN DEFAULT FALSE COMMENT '是否啟用',
+    max_tokens INT DEFAULT 6000 COMMENT '最大Token數',
+    temperature DECIMAL(3,2) DEFAULT 0.7 COMMENT '溫度參數',
+    timeout INT DEFAULT 120000 COMMENT 'Timeout（毫秒）',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時間',
+    created_by INT COMMENT '建立者ID',
+    FOREIGN KEY (created_by) REFERENCES 5Why_users(id) ON DELETE SET NULL,
+    INDEX idx_provider (provider),
+    INDEX idx_is_active (is_active),
+    UNIQUE KEY unique_active_provider (provider, is_active)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='LLM API配置表';
+
+-- ============================================
+-- Table: 5Why_system_settings (系統設定表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_system_settings (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    setting_key VARCHAR(100) UNIQUE NOT NULL COMMENT '設定鍵',
+    setting_value TEXT COMMENT '設定值',
+    setting_type VARCHAR(50) DEFAULT 'string' COMMENT '設定類型（string, number, boolean, json）',
+    description TEXT COMMENT '說明',
+    is_public BOOLEAN DEFAULT FALSE COMMENT '是否公開（前端可見）',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新時間',
+    updated_by INT COMMENT '更新者ID',
+    FOREIGN KEY (updated_by) REFERENCES 5Why_users(id) ON DELETE SET NULL,
+    INDEX idx_setting_key (setting_key),
+    INDEX idx_is_public (is_public)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='系統設定表';
+
+-- ============================================
+-- Table: 5Why_audit_logs (稽核日誌表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_audit_logs (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    user_id INT COMMENT '使用者ID',
+    action VARCHAR(100) NOT NULL COMMENT '動作（login, logout, create_analysis, update_user等）',
+    entity_type VARCHAR(50) COMMENT '實體類型（user, analysis, llm_config等）',
+    entity_id INT COMMENT '實體ID',
+    old_value JSON COMMENT '舊值',
+    new_value JSON COMMENT '新值',
+    ip_address VARCHAR(45) COMMENT 'IP位址',
+    user_agent TEXT COMMENT 'User Agent',
+    status ENUM('success', 'failed') DEFAULT 'success' COMMENT '執行狀態',
+    error_message TEXT COMMENT '錯誤訊息',
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP COMMENT '建立時間',
+    FOREIGN KEY (user_id) REFERENCES 5Why_users(id) ON DELETE SET NULL,
+    INDEX idx_user_id (user_id),
+    INDEX idx_action (action),
+    INDEX idx_created_at (created_at),
+    INDEX idx_entity (entity_type, entity_id)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='稽核日誌表';
+
+-- ============================================
+-- Table: 5Why_sessions (Session表)
+-- ============================================
+CREATE TABLE IF NOT EXISTS 5Why_sessions (
+    session_id VARCHAR(128) PRIMARY KEY,
+    expires BIGINT UNSIGNED NOT NULL,
+    data TEXT,
+    INDEX idx_expires (expires)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='Session表';
+
+-- ============================================
+-- Insert Default Data
+-- ============================================
+
+-- 預設管理者帳號（密碼: Admin@123456）
+INSERT INTO 5Why_users (employee_id, username, email, password_hash, role, department, position)
+VALUES
+    ('ADMIN001', 'admin', 'admin@example.com', '$2a$10$YourBcryptHashHere', 'super_admin', 'IT', 'System Administrator'),
+    ('USER001', 'user001', 'user001@example.com', '$2a$10$YourBcryptHashHere', 'user', 'Manufacturing', 'Engineer'),
+    ('USER002', 'user002', 'user002@example.com', '$2a$10$YourBcryptHashHere', 'admin', 'Quality', 'QA Manager')
+ON DUPLICATE KEY UPDATE updated_at = CURRENT_TIMESTAMP;
+
+-- 預設 Ollama LLM 配置
+INSERT INTO 5Why_llm_configs (provider, api_url, model_name, is_active, max_tokens, temperature, timeout)
+VALUES
+    ('ollama', 'https://ollama_pjapi.theaken.com', 'qwen2.5:3b', TRUE, 6000, 0.7, 120000)
+ON DUPLICATE KEY UPDATE updated_at = CURRENT_TIMESTAMP;
+
+-- 預設系統設定
+INSERT INTO 5Why_system_settings (setting_key, setting_value, setting_type, description, is_public)
+VALUES
+    ('app_name', '5 Why Root Cause Analyzer', 'string', '應用程式名稱', TRUE),
+    ('app_version', '1.0.0', 'string', '應用程式版本', TRUE),
+    ('max_analysis_per_day', '50', 'number', '每日最大分析次數', FALSE),
+    ('enable_email_notification', 'false', 'boolean', '啟用Email通知', FALSE),
+    ('default_language', 'zh-TW', 'string', '預設語言', TRUE),
+    ('supported_languages', '["zh-TW","zh-CN","en","ja","ko","vi","th"]', 'json', '支援的語言列表', TRUE)
+ON DUPLICATE KEY UPDATE updated_at = CURRENT_TIMESTAMP;
+
+-- ============================================
+-- Create Views (視圖)
+-- ============================================
+
+-- 使用者分析統計視圖
+CREATE OR REPLACE VIEW 5Why_user_analysis_stats AS
+SELECT
+    u.id AS user_id,
+    u.username,
+    u.employee_id,
+    u.department,
+    COUNT(a.id) AS total_analyses,
+    COUNT(CASE WHEN a.status = 'completed' THEN 1 END) AS completed_analyses,
+    COUNT(CASE WHEN a.status = 'failed' THEN 1 END) AS failed_analyses,
+    AVG(a.processing_time) AS avg_processing_time,
+    MAX(a.created_at) AS last_analysis_at
+FROM 5Why_users u
+LEFT JOIN 5Why_analyses a ON u.id = a.user_id
+GROUP BY u.id, u.username, u.employee_id, u.department;
+
+-- 最近分析記錄視圖
+CREATE OR REPLACE VIEW 5Why_recent_analyses AS
+SELECT
+    a.id,
+    a.finding,
+    u.username,
+    u.employee_id,
+    a.output_language,
+    a.status,
+    a.processing_time,
+    a.created_at
+FROM 5Why_analyses a
+JOIN 5Why_users u ON a.user_id = u.id
+ORDER BY a.created_at DESC
+LIMIT 100;
+
+-- ============================================
+-- End of Schema
+-- ============================================
--- a/models/Analysis.js
+++ b/models/Analysis.js
@@ -13,7 +13,7 @@ class Analysis {

    try {
      const [result] = await pool.execute(
-        `INSERT INTO analyses (user_id, finding, job_content, output_language, status)
+        `INSERT INTO 5Why_analyses (user_id, finding, job_content, output_language, status)
         VALUES (?, ?, ?, ?, 'pending')`,
        [user_id, finding, job_content, output_language]
      );
@@ -30,7 +30,7 @@ class Analysis {
  static async findById(id) {
    try {
      const [rows] = await pool.execute(
-        'SELECT * FROM analyses WHERE id = ?',
+        'SELECT * FROM 5Why_analyses WHERE id = ?',
        [id]
      );
      return rows[0] || null;
@@ -45,7 +45,7 @@ class Analysis {
  static async updateStatus(id, status, errorMessage = null) {
    try {
      await pool.execute(
-        'UPDATE analyses SET status = ?, error_message = ? WHERE id = ?',
+        'UPDATE 5Why_analyses SET status = ?, error_message = ? WHERE id = ?',
        [status, errorMessage, id]
      );
    } catch (error) {
@@ -66,7 +66,7 @@ class Analysis {
      try {
        // 更新主分析記錄
        await connection.execute(
-          `UPDATE analyses
+          `UPDATE 5Why_analyses
           SET problem_restatement = ?, analysis_result = ?, processing_time = ?, status = 'completed'
           WHERE id = ?`,
          [problem_restatement, JSON.stringify(analysis_result), processing_time, id]
@@ -76,7 +76,7 @@ class Analysis {
        if (analysis_result.analyses && Array.isArray(analysis_result.analyses)) {
          for (const perspective of analysis_result.analyses) {
            const [perspectiveResult] = await connection.execute(
-              `INSERT INTO analysis_perspectives
+              `INSERT INTO 5Why_analysis_perspectives
               (analysis_id, perspective, perspective_icon, root_cause, permanent_solution,
                logic_check_forward, logic_check_backward, logic_valid)
               VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
@@ -99,7 +99,7 @@ class Analysis {
              for (const why of perspective.whys) {
                if (why && why.level) {
                  await connection.execute(
-                    `INSERT INTO analysis_whys
+                    `INSERT INTO 5Why_analysis_whys
                     (perspective_id, level, question, answer, is_verified, verification_note)
                     VALUES (?, ?, ?, ?, ?, ?)`,
                    [
@@ -136,8 +136,8 @@ class Analysis {
   */
  static async getByUserId(userId, page = 1, limit = 10, filters = {}) {
    const offset = (page - 1) * limit;
-    let query = 'SELECT * FROM analyses WHERE user_id = ?';
-    let countQuery = 'SELECT COUNT(*) as total FROM analyses WHERE user_id = ?';
+    let query = 'SELECT * FROM 5Why_analyses WHERE user_id = ?';
+    let countQuery = 'SELECT COUNT(*) as total FROM 5Why_analyses WHERE user_id = ?';
    const whereParams = [userId];
    const whereClauses = [];

@@ -168,8 +168,9 @@ class Analysis {
    query += ' ORDER BY created_at DESC LIMIT ? OFFSET ?';

    try {
-      const [rows] = await pool.execute(query, [...whereParams, limit, offset]);
-      const [countResult] = await pool.execute(countQuery, whereParams);
+      // 使用 pool.query 而非 pool.execute，因為 LIMIT/OFFSET 需要數字類型
+      const [rows] = await pool.query(query, [...whereParams, parseInt(limit), parseInt(offset)]);
+      const [countResult] = await pool.query(countQuery, whereParams);

      return {
        data: rows,
@@ -192,10 +193,10 @@ class Analysis {
    const offset = (page - 1) * limit;
    let query = `
      SELECT a.*, u.username, u.employee_id
-      FROM analyses a
-      JOIN users u ON a.user_id = u.id
+      FROM 5Why_analyses a
+      JOIN 5Why_users u ON a.user_id = u.id
    `;
-    let countQuery = 'SELECT COUNT(*) as total FROM analyses a JOIN users u ON a.user_id = u.id';
+    let countQuery = 'SELECT COUNT(*) as total FROM 5Why_analyses a JOIN 5Why_users u ON a.user_id = u.id';
    const whereParams = [];
    const whereClauses = [];

@@ -223,8 +224,9 @@ class Analysis {
    query += ' ORDER BY a.created_at DESC LIMIT ? OFFSET ?';

    try {
-      const [rows] = await pool.execute(query, [...whereParams, limit, offset]);
-      const [countResult] = await pool.execute(countQuery, whereParams);
+      // 使用 pool.query 而非 pool.execute，因為 LIMIT/OFFSET 需要數字類型
+      const [rows] = await pool.query(query, [...whereParams, parseInt(limit), parseInt(offset)]);
+      const [countResult] = await pool.query(countQuery, whereParams);

      return {
        data: rows,
@@ -251,14 +253,14 @@ class Analysis {

      // 取得分析角度
      const [perspectives] = await pool.execute(
-        'SELECT * FROM analysis_perspectives WHERE analysis_id = ? ORDER BY id',
+        'SELECT * FROM 5Why_analysis_perspectives WHERE analysis_id = ? ORDER BY id',
        [id]
      );

      // 為每個角度取得 Whys
      for (const perspective of perspectives) {
        const [whys] = await pool.execute(
-          'SELECT * FROM analysis_whys WHERE perspective_id = ? ORDER BY level',
+          'SELECT * FROM 5Why_analysis_whys WHERE perspective_id = ? ORDER BY level',
          [perspective.id]
        );
        perspective.whys = whys;
@@ -277,7 +279,7 @@ class Analysis {
   */
  static async delete(id) {
    try {
-      await pool.execute('DELETE FROM analyses WHERE id = ?', [id]);
+      await pool.execute('DELETE FROM 5Why_analyses WHERE id = ?', [id]);
      return true;
    } catch (error) {
      throw new Error(`Error deleting analysis: ${error.message}`);
@@ -289,9 +291,10 @@ class Analysis {
   */
  static async getRecent(limit = 100) {
    try {
-      const [rows] = await pool.execute(
-        'SELECT * FROM recent_analyses LIMIT ?',
-        [limit]
+      // 使用 pool.query 而非 pool.execute，因為 LIMIT 需要數字類型
+      const [rows] = await pool.query(
+        'SELECT * FROM 5Why_recent_analyses LIMIT ?',
+        [parseInt(limit)]
      );
      return rows;
    } catch (error) {
@@ -312,7 +315,7 @@ class Analysis {
          COUNT(CASE WHEN status = 'processing' THEN 1 END) as processing,
          AVG(processing_time) as avg_processing_time,
          MAX(created_at) as last_analysis_at
-        FROM analyses
+        FROM 5Why_analyses
      `;

      const params = [];
--- a/models/AuditLog.js
+++ b/models/AuditLog.js
@@ -24,7 +24,7 @@ class AuditLog {

    try {
      await pool.execute(
-        `INSERT INTO audit_logs
+        `INSERT INTO 5Why_audit_logs
         (user_id, action, entity_type, entity_id, old_value, new_value,
          ip_address, user_agent, status, error_message)
         VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)`,
@@ -126,10 +126,10 @@ class AuditLog {
    const offset = (page - 1) * limit;
    let query = `
      SELECT al.*, u.username, u.employee_id
-      FROM audit_logs al
-      LEFT JOIN users u ON al.user_id = u.id
+      FROM 5Why_audit_logs al
+      LEFT JOIN 5Why_users u ON al.user_id = u.id
    `;
-    let countQuery = 'SELECT COUNT(*) as total FROM audit_logs al';
+    let countQuery = 'SELECT COUNT(*) as total FROM 5Why_audit_logs al';
    const params = [];
    const whereClauses = [];

@@ -166,11 +166,12 @@ class AuditLog {
    }

    query += ' ORDER BY al.created_at DESC LIMIT ? OFFSET ?';
-    params.push(limit, offset);
+    params.push(parseInt(limit), parseInt(offset));

    try {
-      const [rows] = await pool.execute(query, params);
-      const [countResult] = await pool.execute(countQuery, params.slice(0, -2));
+      // 使用 pool.query 而非 pool.execute，因為 LIMIT/OFFSET 需要數字類型
+      const [rows] = await pool.query(query, params);
+      const [countResult] = await pool.query(countQuery, params.slice(0, -2));

      return {
        data: rows,
@@ -199,7 +200,7 @@ class AuditLog {
  static async cleanup(daysToKeep = 90) {
    try {
      const [result] = await pool.execute(
-        'DELETE FROM audit_logs WHERE created_at < DATE_SUB(NOW(), INTERVAL ? DAY)',
+        'DELETE FROM 5Why_audit_logs WHERE created_at < DATE_SUB(NOW(), INTERVAL ? DAY)',
        [daysToKeep]
      );
      return result.affectedRows;
--- a/models/User.js
+++ b/models/User.js
@@ -12,7 +12,7 @@ class User {
  static async findById(id) {
    try {
      const [rows] = await pool.execute(
-        'SELECT id, employee_id, username, email, role, department, position, is_active, created_at, last_login_at FROM users WHERE id = ?',
+        'SELECT id, employee_id, username, email, role, department, position, is_active, created_at, last_login_at FROM 5Why_users WHERE id = ?',
        [id]
      );
      return rows[0] || null;
@@ -27,7 +27,7 @@ class User {
  static async findByEmail(email) {
    try {
      const [rows] = await pool.execute(
-        'SELECT * FROM users WHERE email = ? AND is_active = 1',
+        'SELECT * FROM 5Why_users WHERE email = ? AND is_active = 1',
        [email]
      );
      return rows[0] || null;
@@ -42,7 +42,7 @@ class User {
  static async findByEmployeeId(employeeId) {
    try {
      const [rows] = await pool.execute(
-        'SELECT * FROM users WHERE employee_id = ? AND is_active = 1',
+        'SELECT * FROM 5Why_users WHERE employee_id = ? AND is_active = 1',
        [employeeId]
      );
      return rows[0] || null;
@@ -69,7 +69,7 @@ class User {
      const passwordHash = await bcrypt.hash(password, 10);

      const [result] = await pool.execute(
-        `INSERT INTO users (employee_id, username, email, password_hash, role, department, position)
+        `INSERT INTO 5Why_users (employee_id, username, email, password_hash, role, department, position)
         VALUES (?, ?, ?, ?, ?, ?, ?)`,
        [employee_id, username, email, passwordHash, role, department, position]
      );
@@ -91,7 +91,7 @@ class User {

    try {
      await pool.execute(
-        `UPDATE users
+        `UPDATE 5Why_users
         SET username = ?, email = ?, role = ?, department = ?, position = ?, is_active = ?
         WHERE id = ?`,
        [username, email, role, department, position, is_active, id]
@@ -110,7 +110,7 @@ class User {
    try {
      const passwordHash = await bcrypt.hash(newPassword, 10);
      await pool.execute(
-        'UPDATE users SET password_hash = ? WHERE id = ?',
+        'UPDATE 5Why_users SET password_hash = ? WHERE id = ?',
        [passwordHash, id]
      );
      return true;
@@ -125,7 +125,7 @@ class User {
  static async updateLastLogin(id) {
    try {
      await pool.execute(
-        'UPDATE users SET last_login_at = CURRENT_TIMESTAMP WHERE id = ?',
+        'UPDATE 5Why_users SET last_login_at = CURRENT_TIMESTAMP WHERE id = ?',
        [id]
      );
    } catch (error) {
@@ -138,8 +138,8 @@ class User {
   */
  static async getAll(page = 1, limit = 10, filters = {}) {
    const offset = (page - 1) * limit;
-    let query = 'SELECT id, employee_id, username, email, role, department, position, is_active, created_at FROM users';
-    let countQuery = 'SELECT COUNT(*) as total FROM users';
+    let query = 'SELECT id, employee_id, username, email, role, department, position, is_active, created_at FROM 5Why_users';
+    let countQuery = 'SELECT COUNT(*) as total FROM 5Why_users';
    const whereParams = [];
    const whereClauses = [];

@@ -167,8 +167,9 @@ class User {
    query += ' ORDER BY created_at DESC LIMIT ? OFFSET ?';

    try {
-      const [rows] = await pool.execute(query, [...whereParams, limit, offset]);
-      const [countResult] = await pool.execute(countQuery, whereParams);
+      // 使用 query 而非 execute，因為 LIMIT 和 OFFSET 參數需要數字類型
+      const [rows] = await pool.query(query, [...whereParams, parseInt(limit), parseInt(offset)]);
+      const [countResult] = await pool.query(countQuery, whereParams);

      return {
        data: rows,
@@ -190,7 +191,7 @@ class User {
  static async delete(id) {
    try {
      await pool.execute(
-        'UPDATE users SET is_active = 0 WHERE id = ?',
+        'UPDATE 5Why_users SET is_active = 0 WHERE id = ?',
        [id]
      );
      return true;
@@ -204,7 +205,7 @@ class User {
   */
  static async hardDelete(id) {
    try {
-      await pool.execute('DELETE FROM users WHERE id = ?', [id]);
+      await pool.execute('DELETE FROM 5Why_users WHERE id = ?', [id]);
      return true;
    } catch (error) {
      throw new Error(`Error hard deleting user: ${error.message}`);
@@ -217,7 +218,7 @@ class User {
  static async getStats(userId) {
    try {
      const [rows] = await pool.execute(
-        'SELECT * FROM user_analysis_stats WHERE user_id = ?',
+        'SELECT * FROM 5Why_user_analysis_stats WHERE user_id = ?',
        [userId]
      );
      return rows[0] || null;
--- a/routes/llmConfig.js
+++ b/routes/llmConfig.js
@@ -13,7 +13,7 @@ const router = express.Router();
 router.get('/', requireAuth, asyncHandler(async (req, res) => {
  const configs = await query(
    `SELECT id, provider, api_url, model_name, is_active, created_at, updated_at
-     FROM llm_configs
+     FROM 5Why_llm_configs
     ORDER BY is_active DESC, created_at DESC`
  );

@@ -30,7 +30,7 @@ router.get('/', requireAuth, asyncHandler(async (req, res) => {
 router.get('/active', requireAuth, asyncHandler(async (req, res) => {
  const [config] = await query(
    `SELECT id, provider, api_url, model_name, temperature, max_tokens, timeout
-     FROM llm_configs
+     FROM 5Why_llm_configs
     WHERE is_active = 1
     LIMIT 1`
  );
@@ -72,7 +72,7 @@ router.post('/', requireSuperAdmin, asyncHandler(async (req, res) => {
  }

  const result = await query(
-    `INSERT INTO llm_configs
+    `INSERT INTO 5Why_llm_configs
     (provider, api_url, api_key, model_name, temperature, max_tokens, timeout)
     VALUES (?, ?, ?, ?, ?, ?, ?)`,
    [
@@ -128,7 +128,7 @@ router.put('/:id', requireSuperAdmin, asyncHandler(async (req, res) => {
  }

  // 檢查配置是否存在
-  const [existing] = await query('SELECT id FROM llm_configs WHERE id = ?', [configId]);
+  const [existing] = await query('SELECT id FROM 5Why_llm_configs WHERE id = ?', [configId]);
  if (!existing) {
    return res.status(404).json({
      success: false,
@@ -137,7 +137,7 @@ router.put('/:id', requireSuperAdmin, asyncHandler(async (req, res) => {
  }

  await query(
-    `UPDATE llm_configs
+    `UPDATE 5Why_llm_configs
     SET provider = ?, api_url = ?, api_key = ?, model_name = ?,
         temperature = ?, max_tokens = ?, timeout = ?, updated_at = NOW()
     WHERE id = ?`,
@@ -178,7 +178,7 @@ router.put('/:id/activate', requireSuperAdmin, asyncHandler(async (req, res) =>
  const configId = parseInt(req.params.id);

  // 檢查配置是否存在
-  const [existing] = await query('SELECT id, provider FROM llm_configs WHERE id = ?', [configId]);
+  const [existing] = await query('SELECT id, provider FROM 5Why_llm_configs WHERE id = ?', [configId]);
  if (!existing) {
    return res.status(404).json({
      success: false,
@@ -187,10 +187,10 @@ router.put('/:id/activate', requireSuperAdmin, asyncHandler(async (req, res) =>
  }

  // 先停用所有配置
-  await query('UPDATE llm_configs SET is_active = 0');
+  await query('UPDATE 5Why_llm_configs SET is_active = 0');

  // 啟用指定配置
-  await query('UPDATE llm_configs SET is_active = 1, updated_at = NOW() WHERE id = ?', [configId]);
+  await query('UPDATE 5Why_llm_configs SET is_active = 1, updated_at = NOW() WHERE id = ?', [configId]);

  // 記錄稽核日誌
  await AuditLog.logUpdate(
@@ -217,7 +217,7 @@ router.delete('/:id', requireSuperAdmin, asyncHandler(async (req, res) => {
  const configId = parseInt(req.params.id);

  // 檢查是否為啟用中的配置
-  const [existing] = await query('SELECT is_active FROM llm_configs WHERE id = ?', [configId]);
+  const [existing] = await query('SELECT is_active FROM 5Why_llm_configs WHERE id = ?', [configId]);
  if (!existing) {
    return res.status(404).json({
      success: false,
@@ -232,7 +232,7 @@ router.delete('/:id', requireSuperAdmin, asyncHandler(async (req, res) => {
    });
  }

-  await query('DELETE FROM llm_configs WHERE id = ?', [configId]);
+  await query('DELETE FROM 5Why_llm_configs WHERE id = ?', [configId]);

  // 記錄稽核日誌
  await AuditLog.logDelete(
--- a/routes/llmTest.js
+++ b/routes/llmTest.js
@@ -0,0 +1,219 @@
+import express from 'express';
+import { asyncHandler } from '../middleware/errorHandler.js';
+import { requireAuth, requireAdmin } from '../middleware/auth.js';
+
+const router = express.Router();
+
+/**
+ * GET /api/llm-test/models
+ * 列出可用的 LLM 模型（從 API 動態獲取）
+ */
+router.get('/models', requireAuth, asyncHandler(async (req, res) => {
+  const { api_url } = req.query;
+  const targetUrl = api_url || 'https://ollama_pjapi.theaken.com';
+
+  try {
+    const axios = (await import('axios')).default;
+
+    const response = await axios.get(`${targetUrl}/v1/models`, {
+      timeout: 10000
+    });
+
+    if (response.data && response.data.data) {
+      const models = response.data.data.map(model => ({
+        id: model.id,
+        name: model.info?.name || model.id,
+        description: model.info?.description || '',
+        best_for: model.info?.best_for || '',
+        owned_by: model.owned_by || 'unknown'
+      }));
+
+      res.json({
+        success: true,
+        data: models
+      });
+    } else {
+      throw new Error('Invalid response format');
+    }
+  } catch (error) {
+    res.status(500).json({
+      success: false,
+      error: '無法取得模型列表',
+      message: error.message
+    });
+  }
+}));
+
+/**
+ * POST /api/llm-test/quick
+ * 快速測試 LLM 連線（僅管理員）
+ */
+router.post('/quick', requireAdmin, asyncHandler(async (req, res) => {
+  const { api_url, api_key, model_name } = req.body;
+
+  if (!api_url || !model_name) {
+    return res.status(400).json({
+      success: false,
+      error: '請提供 API 端點和模型名稱'
+    });
+  }
+
+  try {
+    const axios = (await import('axios')).default;
+    const startTime = Date.now();
+
+    const response = await axios.post(
+      `${api_url}/v1/chat/completions`,
+      {
+        model: model_name,
+        messages: [
+          { role: 'user', content: 'Hello, please respond with just "OK"' }
+        ],
+        max_tokens: 10
+      },
+      {
+        timeout: 15000,
+        headers: {
+          'Content-Type': 'application/json',
+          ...(api_key && { 'Authorization': `Bearer ${api_key}` })
+        }
+      }
+    );
+
+    const responseTime = Date.now() - startTime;
+
+    if (response.data && response.data.choices) {
+      res.json({
+        success: true,
+        message: 'LLM API 連線測試成功',
+        responseTime: responseTime,
+        response: response.data.choices[0]?.message?.content || ''
+      });
+    } else {
+      throw new Error('Invalid API response format');
+    }
+  } catch (error) {
+    res.status(500).json({
+      success: false,
+      error: 'LLM API 連線測試失敗',
+      message: error.message
+    });
+  }
+}));
+
+/**
+ * POST /api/llm-test/chat
+ * 直接與 LLM 對話（測試用，僅管理員）
+ */
+router.post('/chat', requireAdmin, asyncHandler(async (req, res) => {
+  const { api_url, api_key, model_name, messages, temperature, max_tokens, stream } = req.body;
+
+  if (!api_url || !model_name || !messages) {
+    return res.status(400).json({
+      success: false,
+      error: '請提供必要參數'
+    });
+  }
+
+  try {
+    const axios = (await import('axios')).default;
+    const startTime = Date.now();
+
+    // 非串流模式
+    if (!stream) {
+      const response = await axios.post(
+        `${api_url}/v1/chat/completions`,
+        {
+          model: model_name,
+          messages: messages,
+          temperature: temperature || 0.7,
+          max_tokens: max_tokens || 2000,
+          stream: false
+        },
+        {
+          timeout: 120000,
+          headers: {
+            'Content-Type': 'application/json',
+            ...(api_key && { 'Authorization': `Bearer ${api_key}` })
+          }
+        }
+      );
+
+      const responseTime = Date.now() - startTime;
+
+      res.json({
+        success: true,
+        data: {
+          content: response.data.choices[0]?.message?.content || '',
+          usage: response.data.usage,
+          model: response.data.model,
+          responseTime: responseTime
+        }
+      });
+    } else {
+      // 串流模式 - 使用 Server-Sent Events
+      res.setHeader('Content-Type', 'text/event-stream');
+      res.setHeader('Cache-Control', 'no-cache');
+      res.setHeader('Connection', 'keep-alive');
+
+      const response = await axios.post(
+        `${api_url}/v1/chat/completions`,
+        {
+          model: model_name,
+          messages: messages,
+          temperature: temperature || 0.7,
+          max_tokens: max_tokens || 2000,
+          stream: true
+        },
+        {
+          timeout: 120000,
+          responseType: 'stream',
+          headers: {
+            'Content-Type': 'application/json',
+            ...(api_key && { 'Authorization': `Bearer ${api_key}` })
+          }
+        }
+      );
+
+      response.data.on('data', (chunk) => {
+        const lines = chunk.toString().split('\n');
+        for (const line of lines) {
+          if (line.startsWith('data: ')) {
+            const dataStr = line.slice(6).trim();
+            if (dataStr && dataStr !== '[DONE]') {
+              try {
+                const data = JSON.parse(dataStr);
+                const content = data.choices?.[0]?.delta?.content;
+                if (content) {
+                  res.write(`data: ${JSON.stringify({ content })}\n\n`);
+                }
+              } catch (e) {
+                // Skip invalid JSON
+              }
+            }
+          }
+        }
+      });
+
+      response.data.on('end', () => {
+        res.write('data: [DONE]\n\n');
+        res.end();
+      });
+
+      response.data.on('error', (error) => {
+        res.write(`data: ${JSON.stringify({ error: error.message })}\n\n`);
+        res.end();
+      });
+    }
+  } catch (error) {
+    if (!res.headersSent) {
+      res.status(500).json({
+        success: false,
+        error: 'LLM 對話失敗',
+        message: error.message
+      });
+    }
+  }
+}));
+
+export default router;
--- a/scripts/add-deepseek-config.js
+++ b/scripts/add-deepseek-config.js
@@ -17,7 +17,7 @@ async function addDeepSeekConfig() {
  try {
    // Check if DeepSeek config already exists
    const existing = await query(
-      `SELECT id FROM llm_configs WHERE provider_name = 'DeepSeek' LIMIT 1`
+      `SELECT id FROM 5Why_llm_configs WHERE provider = 'DeepSeek' LIMIT 1`
    );

    if (existing.length > 0) {
@@ -35,12 +35,12 @@ async function addDeepSeekConfig() {
    }

    // First, deactivate all existing configs
-    await query('UPDATE llm_configs SET is_active = 0');
+    await query('UPDATE 5Why_llm_configs SET is_active = 0');

    // Insert DeepSeek configuration
    const result = await query(
-      `INSERT INTO llm_configs
-       (provider_name, api_endpoint, api_key, model_name, temperature, max_tokens, timeout_seconds, is_active)
+      `INSERT INTO 5Why_llm_configs
+       (provider, api_url, api_key, model_name, temperature, max_tokens, timeout, is_active)
       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
      [
        'DeepSeek',
@@ -49,7 +49,7 @@ async function addDeepSeekConfig() {
        process.env.DEEPSEEK_MODEL || 'deepseek-chat',
        0.7,
        6000,
-        120,
+        120000,
        1 // Set as active
      ]
    );
--- a/scripts/add-ollama-config.js
+++ b/scripts/add-ollama-config.js
@@ -0,0 +1,81 @@
+#!/usr/bin/env node
+/**
+ * Add Ollama LLM Configuration
+ * This script adds Ollama configuration to the llm_configs table
+ */
+
+import { pool, query } from '../config.js';
+import dotenv from 'dotenv';
+
+dotenv.config();
+
+async function addOllamaConfig() {
+  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
+  console.log('  Adding Ollama LLM Configuration');
+  console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
+
+  try {
+    // Check if Ollama config already exists
+    const existing = await query(
+      `SELECT id FROM 5Why_llm_configs WHERE provider = 'Ollama' LIMIT 1`
+    );
+
+    if (existing.length > 0) {
+      console.log('✅ Ollama configuration already exists (ID:', existing[0].id, ')');
+      console.log('   Skipping...\n');
+      return;
+    }
+
+    // First, deactivate all existing configs
+    await query('UPDATE 5Why_llm_configs SET is_active = 0');
+
+    // Insert Ollama configuration
+    const result = await query(
+      `INSERT INTO 5Why_llm_configs
+       (provider, api_url, api_key, model_name, temperature, max_tokens, timeout, is_active)
+       VALUES (?, ?, ?, ?, ?, ?, ?, ?)`,
+      [
+        'Ollama',
+        process.env.OLLAMA_API_URL || 'https://ollama_pjapi.theaken.com',
+        null, // Ollama doesn't need API key
+        process.env.OLLAMA_MODEL || 'qwen2.5:3b',
+        0.7,
+        6000,
+        120000,
+        1 // Set as active
+      ]
+    );
+
+    console.log('✅ Ollama configuration added successfully!');
+    console.log('   Config ID:', result.insertId);
+    console.log('   Provider: Ollama');
+    console.log('   Model: qwen2.5:3b');
+    console.log('   API URL:', process.env.OLLAMA_API_URL || 'https://ollama_pjapi.theaken.com');
+    console.log('   Status: Active\n');
+
+    console.log('📝 Notes:');
+    console.log('   - Ollama is FREE and runs on your infrastructure');
+    console.log('   - No API key required');
+    console.log('   - Current model: qwen2.5:3b');
+    console.log('   - You can manage it in Admin Panel > LLM 配置\n');
+
+  } catch (error) {
+    console.error('❌ Error adding Ollama configuration:', error.message);
+    process.exit(1);
+  } finally {
+    await pool.end();
+  }
+}
+
+// Run the script
+addOllamaConfig()
+  .then(() => {
+    console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━');
+    console.log('  Configuration Complete');
+    console.log('━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━\n');
+    process.exit(0);
+  })
+  .catch((error) => {
+    console.error('Fatal error:', error);
+    process.exit(1);
+  });
--- a/scripts/fix-indexes.js
+++ b/scripts/fix-indexes.js
@@ -0,0 +1,204 @@
+#!/usr/bin/env node
+/**
+ * Fix Database Indexes
+ * Ensures all indexes exist on renamed 5Why_ tables
+ *
+ * Run: node scripts/fix-indexes.js
+ */
+
+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'
+};
+
+// Index definitions for each table
+const indexDefinitions = {
+  '5Why_users': [
+    { name: 'idx_employee_id', columns: 'employee_id' },
+    { name: 'idx_email', columns: 'email' },
+    { name: 'idx_role', columns: 'role' }
+  ],
+  '5Why_analyses': [
+    { name: 'idx_user_id', columns: 'user_id' },
+    { name: 'idx_status', columns: 'status' },
+    { name: 'idx_created_at', columns: 'created_at' }
+  ],
+  '5Why_analysis_perspectives': [
+    { name: 'idx_analysis_id', columns: 'analysis_id' }
+  ],
+  '5Why_analysis_whys': [
+    { name: 'idx_perspective_id', columns: 'perspective_id' },
+    { name: 'idx_level', columns: 'level' }
+  ],
+  '5Why_llm_configs': [
+    { name: 'idx_provider', columns: 'provider' },
+    { name: 'idx_is_active', columns: 'is_active' }
+  ],
+  '5Why_system_settings': [
+    { name: 'idx_setting_key', columns: 'setting_key' },
+    { name: 'idx_is_public', columns: 'is_public' }
+  ],
+  '5Why_audit_logs': [
+    { name: 'idx_user_id', columns: 'user_id' },
+    { name: 'idx_action', columns: 'action' },
+    { name: 'idx_created_at', columns: 'created_at' },
+    { name: 'idx_entity', columns: 'entity_type, entity_id' }
+  ],
+  '5Why_sessions': [
+    { name: 'idx_expires', columns: 'expires' }
+  ]
+};
+
+async function fixIndexes() {
+  let connection;
+
+  try {
+    console.log('\n╔════════════════════════════════════════════════════════╗');
+    console.log('║  5 Why Analyzer - Fix Database Indexes                 ║');
+    console.log('╚════════════════════════════════════════════════════════╝\n');
+
+    console.log('🔄 Connecting to database...');
+    connection = await mysql.createConnection(dbConfig);
+    console.log('✅ Connected successfully\n');
+
+    // Process each table
+    for (const [tableName, indexes] of Object.entries(indexDefinitions)) {
+      console.log(`📋 Processing table: ${tableName}`);
+
+      // Check if table exists
+      const [tableExists] = await connection.execute(
+        `SELECT COUNT(*) as count FROM information_schema.tables
+         WHERE table_schema = ? AND table_name = ?`,
+        [dbConfig.database, tableName]
+      );
+
+      if (tableExists[0].count === 0) {
+        console.log(`   ⚠ Table ${tableName} not found, skipping...`);
+        continue;
+      }
+
+      // Get existing indexes
+      const [existingIndexes] = await connection.execute(
+        `SELECT DISTINCT INDEX_NAME FROM information_schema.statistics
+         WHERE table_schema = ? AND table_name = ?`,
+        [dbConfig.database, tableName]
+      );
+      const existingIndexNames = existingIndexes.map(idx => idx.INDEX_NAME);
+
+      // Create missing indexes
+      for (const index of indexes) {
+        if (existingIndexNames.includes(index.name)) {
+          console.log(`   ✓ Index ${index.name} already exists`);
+        } else {
+          try {
+            await connection.execute(
+              `CREATE INDEX ${index.name} ON \`${tableName}\` (${index.columns})`
+            );
+            console.log(`   ✓ Created index: ${index.name} on (${index.columns})`);
+          } catch (err) {
+            if (err.code === 'ER_DUP_KEYNAME') {
+              console.log(`   ⚠ Index ${index.name} already exists (duplicate)`);
+            } else {
+              console.error(`   ✗ Error creating index ${index.name}: ${err.message}`);
+            }
+          }
+        }
+      }
+    }
+
+    // Verify unique constraints on 5Why_users
+    console.log('\n📋 Verifying unique constraints on 5Why_users...');
+
+    // Check employee_id unique constraint
+    const [empUnique] = await connection.execute(
+      `SELECT COUNT(*) as count FROM information_schema.statistics
+       WHERE table_schema = ? AND table_name = '5Why_users'
+       AND column_name = 'employee_id' AND non_unique = 0`,
+      [dbConfig.database]
+    );
+
+    if (empUnique[0].count > 0) {
+      console.log('   ✓ employee_id has unique constraint');
+    } else {
+      console.log('   ⚠ employee_id missing unique constraint, adding...');
+      try {
+        await connection.execute(
+          `ALTER TABLE 5Why_users ADD UNIQUE INDEX idx_employee_id_unique (employee_id)`
+        );
+        console.log('   ✓ Added unique constraint on employee_id');
+      } catch (err) {
+        if (err.code === 'ER_DUP_KEYNAME' || err.message.includes('Duplicate')) {
+          console.log('   ✓ Unique constraint already exists');
+        } else {
+          console.error(`   ✗ Error: ${err.message}`);
+        }
+      }
+    }
+
+    // Check email unique constraint
+    const [emailUnique] = await connection.execute(
+      `SELECT COUNT(*) as count FROM information_schema.statistics
+       WHERE table_schema = ? AND table_name = '5Why_users'
+       AND column_name = 'email' AND non_unique = 0`,
+      [dbConfig.database]
+    );
+
+    if (emailUnique[0].count > 0) {
+      console.log('   ✓ email has unique constraint');
+    } else {
+      console.log('   ⚠ email missing unique constraint, adding...');
+      try {
+        await connection.execute(
+          `ALTER TABLE 5Why_users ADD UNIQUE INDEX idx_email_unique (email)`
+        );
+        console.log('   ✓ Added unique constraint on email');
+      } catch (err) {
+        if (err.code === 'ER_DUP_KEYNAME' || err.message.includes('Duplicate')) {
+          console.log('   ✓ Unique constraint already exists');
+        } else {
+          console.error(`   ✗ Error: ${err.message}`);
+        }
+      }
+    }
+
+    console.log('\n╔════════════════════════════════════════════════════════╗');
+    console.log('║  Index Fix Complete!                                   ║');
+    console.log('╚════════════════════════════════════════════════════════╝\n');
+
+    // Show current indexes for 5Why_users
+    console.log('📊 Current indexes on 5Why_users:');
+    const [userIndexes] = await connection.execute(
+      `SELECT INDEX_NAME, COLUMN_NAME, NON_UNIQUE
+       FROM information_schema.statistics
+       WHERE table_schema = ? AND table_name = '5Why_users'
+       ORDER BY INDEX_NAME, SEQ_IN_INDEX`,
+      [dbConfig.database]
+    );
+
+    userIndexes.forEach(idx => {
+      const unique = idx.NON_UNIQUE === 0 ? ' (UNIQUE)' : '';
+      console.log(`   - ${idx.INDEX_NAME}: ${idx.COLUMN_NAME}${unique}`);
+    });
+
+  } catch (error) {
+    console.error('\n❌ Fix indexes failed:');
+    console.error('   Error:', error.message);
+    process.exit(1);
+  } finally {
+    if (connection) {
+      await connection.end();
+      console.log('\n🔌 Database connection closed\n');
+    }
+  }
+}
+
+// Execute
+fixIndexes();
--- a/scripts/migrate-table-prefix.js
+++ b/scripts/migrate-table-prefix.js
@@ -0,0 +1,177 @@
+#!/usr/bin/env node
+/**
+ * Database Migration Script
+ * Renames all tables to add 5Why_ prefix
+ *
+ * Run: node scripts/migrate-table-prefix.js
+ */
+
+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'
+};
+
+// 要重新命名的表（舊名 -> 新名）
+const tableRenames = [
+  { old: 'users', new: '5Why_users' },
+  { old: 'analyses', new: '5Why_analyses' },
+  { old: 'analysis_perspectives', new: '5Why_analysis_perspectives' },
+  { old: 'analysis_whys', new: '5Why_analysis_whys' },
+  { old: 'llm_configs', new: '5Why_llm_configs' },
+  { old: 'system_settings', new: '5Why_system_settings' },
+  { old: 'audit_logs', new: '5Why_audit_logs' },
+  { old: 'sessions', new: '5Why_sessions' }
+];
+
+// 要重新建立的視圖
+const viewRenames = [
+  { old: 'user_analysis_stats', new: '5Why_user_analysis_stats' },
+  { old: 'recent_analyses', new: '5Why_recent_analyses' }
+];
+
+async function migrateTablePrefix() {
+  let connection;
+
+  try {
+    console.log('\n╔════════════════════════════════════════════════════════╗');
+    console.log('║  5 Why Analyzer - Table Prefix Migration               ║');
+    console.log('╚════════════════════════════════════════════════════════╝\n');
+
+    console.log('🔄 Connecting to database...');
+    connection = await mysql.createConnection(dbConfig);
+    console.log('✅ Connected successfully\n');
+
+    // 先刪除舊的視圖（因為它們依賴表）
+    console.log('📋 Dropping old views...');
+    for (const view of viewRenames) {
+      try {
+        await connection.execute(`DROP VIEW IF EXISTS ${view.old}`);
+        console.log(`   ✓ Dropped view: ${view.old}`);
+      } catch (err) {
+        console.log(`   ⚠ View ${view.old} not found or already dropped`);
+      }
+    }
+    console.log('');
+
+    // 重新命名表
+    console.log('📋 Renaming tables...');
+    for (const table of tableRenames) {
+      try {
+        // 檢查舊表是否存在
+        const [oldExists] = await connection.execute(
+          `SELECT COUNT(*) as count FROM information_schema.tables
+           WHERE table_schema = ? AND table_name = ?`,
+          [dbConfig.database, table.old]
+        );
+
+        // 檢查新表是否已存在
+        const [newExists] = await connection.execute(
+          `SELECT COUNT(*) as count FROM information_schema.tables
+           WHERE table_schema = ? AND table_name = ?`,
+          [dbConfig.database, table.new]
+        );
+
+        if (oldExists[0].count > 0 && newExists[0].count === 0) {
+          await connection.execute(`RENAME TABLE \`${table.old}\` TO \`${table.new}\``);
+          console.log(`   ✓ Renamed: ${table.old} -> ${table.new}`);
+        } else if (newExists[0].count > 0) {
+          console.log(`   ⚠ Table ${table.new} already exists, skipping...`);
+        } else {
+          console.log(`   ⚠ Table ${table.old} not found, skipping...`);
+        }
+      } catch (err) {
+        console.error(`   ✗ Error renaming ${table.old}: ${err.message}`);
+      }
+    }
+    console.log('');
+
+    // 建立新的視圖
+    console.log('📋 Creating new views...');
+
+    // user_analysis_stats 視圖
+    try {
+      await connection.execute(`
+        CREATE OR REPLACE VIEW 5Why_user_analysis_stats AS
+        SELECT
+            u.id AS user_id,
+            u.username,
+            u.employee_id,
+            u.department,
+            COUNT(a.id) AS total_analyses,
+            COUNT(CASE WHEN a.status = 'completed' THEN 1 END) AS completed_analyses,
+            COUNT(CASE WHEN a.status = 'failed' THEN 1 END) AS failed_analyses,
+            AVG(a.processing_time) AS avg_processing_time,
+            MAX(a.created_at) AS last_analysis_at
+        FROM 5Why_users u
+        LEFT JOIN 5Why_analyses a ON u.id = a.user_id
+        GROUP BY u.id, u.username, u.employee_id, u.department
+      `);
+      console.log('   ✓ Created view: 5Why_user_analysis_stats');
+    } catch (err) {
+      console.error(`   ✗ Error creating view 5Why_user_analysis_stats: ${err.message}`);
+    }
+
+    // recent_analyses 視圖
+    try {
+      await connection.execute(`
+        CREATE OR REPLACE VIEW 5Why_recent_analyses AS
+        SELECT
+            a.id,
+            a.finding,
+            u.username,
+            u.employee_id,
+            a.output_language,
+            a.status,
+            a.processing_time,
+            a.created_at
+        FROM 5Why_analyses a
+        JOIN 5Why_users u ON a.user_id = u.id
+        ORDER BY a.created_at DESC
+        LIMIT 100
+      `);
+      console.log('   ✓ Created view: 5Why_recent_analyses');
+    } catch (err) {
+      console.error(`   ✗ Error creating view 5Why_recent_analyses: ${err.message}`);
+    }
+
+    console.log('\n╔════════════════════════════════════════════════════════╗');
+    console.log('║  Migration Complete!                                   ║');
+    console.log('╚════════════════════════════════════════════════════════╝\n');
+
+    // 列出所有 5Why_ 表
+    const [tables] = await connection.execute(
+      `SELECT table_name FROM information_schema.tables
+       WHERE table_schema = ? AND table_name LIKE '5Why_%'
+       ORDER BY table_name`,
+      [dbConfig.database]
+    );
+
+    if (tables.length > 0) {
+      console.log('📊 5Why tables in database:');
+      tables.forEach((table, index) => {
+        console.log(`   ${index + 1}. ${table.TABLE_NAME || table.table_name}`);
+      });
+    }
+
+  } catch (error) {
+    console.error('\n❌ Migration failed:');
+    console.error('   Error:', error.message);
+    process.exit(1);
+  } finally {
+    if (connection) {
+      await connection.end();
+      console.log('\n🔌 Database connection closed\n');
+    }
+  }
+}
+
+// 執行遷移
+migrateTablePrefix();
--- a/scripts/seed-test-users.js
+++ b/scripts/seed-test-users.js
@@ -60,7 +60,7 @@ async function seedTestUsers() {
    for (const user of testUsers) {
      // 檢查使用者是否已存在 (只用 email 精確匹配)
      const [existing] = await connection.execute(
-        'SELECT id FROM users WHERE email = ?',
+        'SELECT id FROM 5Why_users WHERE email = ?',
        [user.email]
      );

@@ -68,7 +68,7 @@ async function seedTestUsers() {
        // 更新現有使用者的密碼
        const passwordHash = await bcrypt.hash(user.password, 10);
        await connection.execute(
-          'UPDATE users SET password_hash = ?, role = ?, is_active = 1, employee_id = ? WHERE email = ?',
+          'UPDATE 5Why_users SET password_hash = ?, role = ?, is_active = 1, employee_id = ? WHERE email = ?',
          [passwordHash, user.role, user.employee_id, user.email]
        );
        console.log(`🔄 Updated: ${user.email} (${user.role})`);
@@ -76,7 +76,7 @@ async function seedTestUsers() {
        // 建立新使用者
        const passwordHash = await bcrypt.hash(user.password, 10);
        await connection.execute(
-          `INSERT INTO users (employee_id, username, email, password_hash, role, department, position, is_active)
+          `INSERT INTO 5Why_users (employee_id, username, email, password_hash, role, department, position, is_active)
           VALUES (?, ?, ?, ?, ?, ?, ?, 1)`,
          [user.employee_id, user.username, user.email, passwordHash, user.role, user.department, user.position]
        );
--- a/vite.config.js
+++ b/vite.config.js
@@ -4,6 +4,7 @@ import react from '@vitejs/plugin-react'
 export default defineConfig({
  plugins: [react()],
  server: {
+    host: 'localhost',
    port: 5173,
    open: true
  }