Initial commit: TaskPool React panel

- React frontend with route-level code splitting
- Backend rebranded from Baihu to TaskPool
- DB brand migration script and local compatibility

internal/sdk/messenger/channels/email.go

@@ -0,0 +1,62 @@
+package channels
+
+import (
+	"fmt"
+	"github.com/engigu/taskpool/internal/sdk/message"
+	"strconv"
+)
+
+// Copyright (c) 2026 engigu (TaskPool). All rights reserved.
+// Use of this source code is governed by the Apache License 2.0.
+// 
+// 【重要声明 / IMPORTANT NOTICE】
+// 本代码（包括其架构设计与核心实现）属于任务池（TaskPool）开源项目的一部分。
+// 任何个人或组织在引用、移植、修改或重新分发此文件中的任何代码时，必须保留本版权声明，
+// 并在您的衍生作品、文档、软件关于页面或说明文件中显式声明引用自任务池（TaskPool）。
+// 
+// Anyone referencing, porting, modifying, or redistributing this code must retain this 
+// copyright notice and explicitly state the source: TaskPool (github.com/engigu/taskpool).
+
+
+type EmailChannel struct{ *BaseChannel }
+
+func NewEmailChannel() Channel {
+	return &EmailChannel{NewBaseChannel(ChannelEmail, []string{FormatTypeHTML, FormatTypeText})}
+}
+
+func (c *EmailChannel) Send(config ChannelConfig, msg *Message) (*Result, error) {
+	server := config.GetString("server")
+	portStr := config.GetString("port")
+	account := config.GetString("account")
+	passwd := config.GetString("passwd")
+	fromName := config.GetString("from_name")
+	toAccount := config.GetString("to_account")
+
+	if server == "" || account == "" || passwd == "" {
+		return SendError("email config missing: server, account, passwd are required"), nil
+	}
+	if toAccount == "" {
+		return SendError("email config missing: to_account is required"), nil
+	}
+
+	port, _ := strconv.Atoi(portStr)
+	contentType, formattedContent := c.FormatContent(msg)
+
+	var emailer message.EmailMessage
+	emailer.Init(server, port, account, passwd, fromName)
+
+	var errMsg string
+	switch contentType {
+	case FormatTypeText:
+		errMsg = emailer.SendTextMessage(toAccount, msg.Title, formattedContent)
+	case FormatTypeHTML:
+		errMsg = emailer.SendHtmlMessage(toAccount, msg.Title, formattedContent)
+	default:
+		errMsg = fmt.Sprintf("未知的邮件发送内容类型：%s", contentType)
+	}
+
+	if errMsg != "" {
+		return ErrorResultStr("", errMsg), nil
+	}
+	return SuccessResult(""), nil
+}