feat: 更新SproutGate前后端代码

sproutgate-backend/internal/models/qq_avatar.go

@@ -0,0 +1,55 @@
+package models
+
+import "strings"
+
+func qqNumericLocalPart(email string) string {
+	e := strings.TrimSpace(strings.ToLower(email))
+	if e == "" {
+		return ""
+	}
+	at := strings.LastIndex(e, "@")
+	if at <= 0 || at >= len(e)-1 {
+		return ""
+	}
+	local, domain := e[:at], e[at+1:]
+	if domain != "qq.com" {
+		return ""
+	}
+	if local == "" {
+		return ""
+	}
+	for _, r := range local {
+		if r < '0' || r > '9' {
+			return ""
+		}
+	}
+	return local
+}
+
+func firstQQUINFromRecord(u UserRecord) string {
+	if q := qqNumericLocalPart(u.Email); q != "" {
+		return q
+	}
+	for _, em := range u.SecondaryEmails {
+		if q := qqNumericLocalPart(em); q != "" {
+			return q
+		}
+	}
+	return ""
+}
+
+func qqAvatarHeadimgURL(uin string) string {
+	return "https://q.qlogo.cn/headimg_dl?dst_uin=" + uin + "&spec=640&img_type=jpg"
+}
+
+// ResolvedAvatarURL 返回用户自选头像；若未设置但主邮箱或辅助邮箱为「纯数字 @qq.com」，
+// 则返回 QQ 头像 CDN 地址（与手动填写该链接等价，不入库）。
+func (u UserRecord) ResolvedAvatarURL() string {
+	if s := strings.TrimSpace(u.AvatarURL); s != "" {
+		return s
+	}
+	if uin := firstQQUINFromRecord(u); uin != "" {
+		return qqAvatarHeadimgURL(uin)
+	}
+	return ""
+}