fix mail function

.env

@@ -8,6 +8,7 @@ DB_PORT=3306
 DB_USER=root
 DB_PASSWORD="1qazCDE#"
 DB_NAME=eis_demo
+MAIL_DB_NAME=zenclouddb
 
 # --- Mail 寄送設定 (以 Gmail 為例) ---
 # 注意：若使用 Gmail，請務必開啟「兩步驟驗證」並申請「應用程式密碼」

src/config/db2.js

@@ -0,0 +1,29 @@
+const mysql = require('mysql2/promise');
+require('dotenv').config();
+
+const pool2 = mysql.createPool({
+    host: process.env.DB_HOST,
+    port: process.env.DB_PORT || 3306,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASSWORD,
+    database: process.env.MAIL_DB_NAME,
+    waitForConnections: true,
+    connectionLimit: 15, // 增加併發處理能力
+    queueLimit: 0,
+    multipleStatements: true,
+	charset: 'utf8mb4',  // 確保這一行存在
+    timezone: '+08:00',  // 強制時區一致
+	dateStrings: true    // 強制將日期作為字串回傳，避免 Node.js 進行二次時區轉換
+});
+
+// 啟動測試
+pool2.getConnection()
+    .then(conn => {
+        console.log('✅ MariaDB Connected Successfully.');
+        conn.release();
+    })
+    .catch(err => {
+        console.error('❌ MariaDB Connection Failed:', err.message);
+    });
+
+module.exports = pool2;

src/services/mailService.js

@@ -1,6 +1,6 @@
 const nodemailer = require('nodemailer');
 const schedule = require('node-schedule');
-const db = require('../config/db');
+const db2 = require('../config/db2');       // connect to zenclouddb for mail  
 const logger = require('../utils/logger'); // 必須引入！
 
 class MailService {
@@ -18,7 +18,7 @@ class MailService {
         schedule.scheduleJob('*/30 * * * * *', async () => {
             try {
                 // 增加一個簡單的連線檢查，避免資料庫掛掉時噴錯
-                const [rows] = await db.query('SELECT * FROM zen_mail_list WHERE mail_status = 0 LIMIT 10');
+                const [rows] = await db2.query('SELECT * FROM zen_mail_list WHERE mail_status = 0 LIMIT 10');
                 
                 if (rows.length > 0) {
                     logger.info(`AutoMail: Processing ${rows.length} messages.`);
@@ -30,12 +30,14 @@ class MailService {
                             from: process.env.MAIL_USER,
                             to: row.recipient,
                             subject: row.mail_subject,
-                            html: row.content
+                            // html: row.content  
+							// Modify By Michael 20260310
+							text: row.content
                         });
-                        await db.query('UPDATE zen_mail_list SET mail_status = 1, sent_at = NOW() WHERE id = ?', [row.id]);
+                        await db2.query('UPDATE zen_mail_list SET mail_status = 1, create_date = NOW() WHERE id = ?', [row.id]);
                     } catch (mailErr) {
                         logger.error(`Mail ID ${row.id} failed: ${mailErr.message}`);
-                        await db.query('UPDATE zen_mail_list SET mail_status = 9, error_log = ? WHERE id = ?', [mailErr.message, row.id]);
+                        await db2.query('UPDATE zen_mail_list SET mail_status = 9, error_log = ? WHERE id = ?', [mailErr.message, row.id]);
                     }
                 }
             } catch (dbErr) {