feat: 将安全策略模板化，新建商户时自动复制初始策略

server/internal/logic/sys/im_policy_support.go

@@ -10,8 +10,10 @@ import (
 	"hotgo/internal/library/imkafka"
 	"hotgo/internal/library/imtenant"
 	"hotgo/internal/model/entity"
+	"hotgo/internal/model/input/sysin"
 	"hotgo/internal/service"
 
+	"github.com/gogf/gf/v2/database/gdb"
 	"github.com/gogf/gf/v2/encoding/gjson"
 	"github.com/gogf/gf/v2/errors/gerror"
 )
@@ -43,6 +45,38 @@ func policyJSON(value *gjson.Json, fallback string) string {
 	return value.String()
 }
 
+// imPolicyTemplateTable 安全策略模板表（平台级单行，新建商户初始策略来源）
+const imPolicyTemplateTable = "im_security_policy_template"
+
+// loadPolicyTemplateRow 读取安全策略模板单行（取最小 id），返回 nil 表示模板未初始化。
+func loadPolicyTemplateRow(model *gdb.Model) (gdb.Record, error) {
+	row, err := model.Order("id ASC").Limit(1).One()
+	if err != nil {
+		return nil, err
+	}
+	if row.IsEmpty() {
+		return nil, nil
+	}
+	return row, nil
+}
+
+// templateCurfewRules 解析模板行 curfew_rules JSON 为宵禁规则输入列表
+func templateCurfewRules(tpl gdb.Record) []*sysin.ImMessageCurfewRuleInp {
+	rules := make([]*sysin.ImMessageCurfewRuleInp, 0)
+	for _, item := range gjson.New(tpl["curfew_rules"].String()).Array() {
+		j := gjson.New(item)
+		rules = append(rules, &sysin.ImMessageCurfewRuleInp{
+			RuleCode: j.Get("ruleCode").String(), RuleName: j.Get("ruleName").String(), DateType: j.Get("dateType").String(),
+			CustomDates: gjson.New(j.Get("customDates").String()), Weekdays: gjson.New(j.Get("weekdays").String()),
+			Timezone: j.Get("timezone").String(), StartTime: j.Get("startTime").String(), EndTime: j.Get("endTime").String(),
+			Scope: j.Get("scope").String(),
+			WhitelistUserIds: gjson.New(j.Get("whitelistUserIds").String()), WhitelistGroupIds: gjson.New(j.Get("whitelistGroupIds").String()),
+			Message: j.Get("message").String(), Status: j.Get("status").Int(), Sort: j.Get("sort").Int(),
+		})
+	}
+	return rules
+}
+
 func publishImPolicyEvent(ctx context.Context, tenantID int64, tenantCode, eventType, group string, version uint) error {
 	return imkafka.PublishConfigEvent(ctx, imkafka.ConfigEventInput{
 		TenantID:   tenantID,