feat: 完善后端并新增 Vue3 WebUI

后端:
- 修复登录校验、DB 并发(单例+WAL+纯Go sqlite)、会话密钥持久化等核心缺陷
- 新增 Timer CRUD/签到/手动触发、执行日志、仪表盘、驱动元数据等 API
- 统一驱动接口: 带 context 的执行器、真实错误返回、敏感字段掩码、连通性测试
- 补全钉钉执行器; Timer 触发/提醒去重; 配置支持默认值与环境变量覆盖

前端:
- Vite+Vue3+TS+Pinia+Element Plus, 由驱动元数据动态渲染配置表单
- 登录/仪表盘(倒计时环)/定时器/规则/账号/日志/设置页面, 支持暗色模式
- 主题色 #66ccff, 信号波纹 logo, go:embed 单二进制部署

构建: Dockerfile 增加前端构建阶段; 补充各驱动配置文档

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

drivers/email/ruleConfigChecker.go

@@ -4,13 +4,15 @@ import (
 	"encoding/json"
 	"fmt"
 	"net/mail"
+
+	"github.com/ssdomei232/goodBaby/internal/meta"
 )
 
 // EmailRuleValidator 邮件规则验证器
 type EmailRuleValidator struct{}
 
 func (v *EmailRuleValidator) GetType() string {
-	return "email"
+	return RuleType
 }
 
 func (v *EmailRuleValidator) Validate(configJSON string) error {
@@ -40,3 +42,18 @@ func (v *EmailRuleValidator) Validate(configJSON string) error {
 
 	return nil
 }
+
+func (v *EmailRuleValidator) Meta() meta.RuleMeta {
+	return meta.RuleMeta{
+		Type:        RuleType,
+		Label:       "发送邮件",
+		Description: "触发时通过关联的 SMTP 账号向指定地址发送邮件。",
+		Docs:        "docs/email-config.md",
+		AccountType: AccountType,
+		Fields: []meta.Field{
+			{Key: "title", Label: "邮件标题", Type: meta.FieldString, Required: true},
+			{Key: "msg", Label: "邮件正文", Type: meta.FieldTextarea, Required: true},
+			{Key: "destinations", Label: "收件人", Type: meta.FieldStringList, Required: true, Placeholder: "someone@example.com"},
+		},
+	}
+}