chore: initial commit of ai site platform

Co-authored-by: Cursor <cursoragent@cursor.com>

platform/internal/userstore/phone.go

@@ -0,0 +1,34 @@
+package userstore
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+var chinaMobileRe = regexp.MustCompile(`^1[3-9]\d{9}$`)
+
+// NormalizePhone 规范化中国大陆手机号（去空格、去 +86/86 前缀）。
+func NormalizePhone(raw string) (string, error) {
+	s := strings.TrimSpace(raw)
+	s = strings.ReplaceAll(s, " ", "")
+	s = strings.ReplaceAll(s, "-", "")
+	if strings.HasPrefix(s, "+86") {
+		s = s[3:]
+	} else if strings.HasPrefix(s, "86") && len(s) == 13 {
+		s = s[2:]
+	}
+	if s == "" {
+		return "", fmt.Errorf("请填写手机号")
+	}
+	if !chinaMobileRe.MatchString(s) {
+		return "", fmt.Errorf("手机号格式不正确（需 11 位大陆号）")
+	}
+	return s, nil
+}
+
+// LooksLikePhone 判断登录账号是否按手机号解析。
+func LooksLikePhone(raw string) bool {
+	_, err := NormalizePhone(raw)
+	return err == nil
+}