From f9ee43b73cec3ff10ba18c858bddea9f347d91b2 Mon Sep 17 00:00:00 2001
From: donald <donald@theaken.com>
Date: Tue, 9 Dec 2025 18:19:53 +0800
Subject: [PATCH] feat: Add 5Why_ prefix to all database tables
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Rename all tables with 5Why_ prefix for namespace isolation
- Update models: User.js, Analysis.js, AuditLog.js
- Update routes: llmConfig.js
- Update scripts: seed-test-users.js, add-deepseek-config.js, add-ollama-config.js
- Add migrate-table-prefix.js script for database migration
- Update db_schema.sql with new table names
- Update views: 5Why_user_analysis_stats, 5Why_recent_analyses

Tables renamed:
- users -> 5Why_users
- analyses -> 5Why_analyses
- analysis_perspectives -> 5Why_analysis_perspectives
- analysis_whys -> 5Why_analysis_whys
- llm_configs -> 5Why_llm_configs
- system_settings -> 5Why_system_settings
- audit_logs -> 5Why_audit_logs
- sessions -> 5Why_sessions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
---
 docs/db_schema.sql              | 227 ++++++++++++++++++++++++++++++++
 models/Analysis.js              |  47 +++----
 models/AuditLog.js              |  17 +--
 models/User.js                  |  29 ++--
 routes/llmConfig.js             |  20 +--
 scripts/add-deepseek-config.js  |  10 +-
 scripts/add-ollama-config.js    |  81 ++++++++++++
 scripts/migrate-table-prefix.js | 177 +++++++++++++++++++++++++
 scripts/seed-test-users.js      |   6 +-
 9 files changed, 552 insertions(+), 62 deletions(-)
 create mode 100644 docs/db_schema.sql
 create mode 100644 scripts/add-ollama-config.js
 create mode 100644 scripts/migrate-table-prefix.js

diff --git a/docs/db_schema.sql b/docs/db_schema.sql
new file mode 100644
index 0000000..4e2a46e
--- /dev/null
+++ 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
+-- ============================================
diff --git a/models/Analysis.js b/models/Analysis.js
index e910872..9de1b52 100644
--- 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 = [];
diff --git a/models/AuditLog.js b/models/AuditLog.js
index 9611c89..026810d 100644
--- 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;
diff --git a/models/User.js b/models/User.js
index 4c87a9d..dbc6b15 100644
--- 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;
diff --git a/routes/llmConfig.js b/routes/llmConfig.js
index 40a1fb5..7ce56dc 100644
--- 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(
diff --git a/scripts/add-deepseek-config.js b/scripts/add-deepseek-config.js
index b4edaab..2287c61 100644
--- 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
       ]
     );
diff --git a/scripts/add-ollama-config.js b/scripts/add-ollama-config.js
new file mode 100644
index 0000000..6b1d759
--- /dev/null
+++ 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);
+  });
diff --git a/scripts/migrate-table-prefix.js b/scripts/migrate-table-prefix.js
new file mode 100644
index 0000000..873aa6b
--- /dev/null
+++ 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();
diff --git a/scripts/seed-test-users.js b/scripts/seed-test-users.js
index e5a30ef..e76de96 100644
--- 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]
         );