chore: initial commit of ai site platform

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

platform/internal/userstore/tenant_slug.go

@@ -0,0 +1,77 @@
+package userstore
+
+import (
+	"fmt"
+	"regexp"
+	"strings"
+	"unicode"
+)
+
+var tenantSlugRe = regexp.MustCompile(`^[a-z][a-z0-9-]{1,31}$`)
+
+// 路径段保留字：不可用作公司 slug（与后续 /{slug}/ 路由冲突）
+var reservedTenantSlugs = map[string]struct{}{
+	"api": {}, "ai": {}, "gateway": {}, "platform": {}, "_platform": {},
+	"admin": {}, "assets": {}, "static": {}, "www": {}, "m": {}, "public": {},
+	"health": {}, "ops": {}, "console": {}, "login": {}, "register": {},
+	"favicon.ico": {}, "robots.txt": {},
+}
+
+// NormalizeTenantSlug 规范化公司路径 slug（全局唯一，用于 www.yuxinda.com/{slug}/）。
+func NormalizeTenantSlug(raw string) (string, error) {
+	s := strings.TrimSpace(strings.ToLower(raw))
+	s = strings.ReplaceAll(s, "_", "-")
+	s = strings.ReplaceAll(s, " ", "-")
+	var b strings.Builder
+	prevDash := false
+	for _, r := range s {
+		if (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') {
+			b.WriteRune(r)
+			prevDash = false
+			continue
+		}
+		if r == '-' {
+			if b.Len() == 0 || prevDash {
+				continue
+			}
+			b.WriteByte('-')
+			prevDash = true
+			continue
+		}
+		// 跳过其它字符（含中文）；中文名需用户另填 slug
+	}
+	s = strings.Trim(b.String(), "-")
+	if s == "" {
+		return "", fmt.Errorf("公司路径 slug 不能为空（请用英文/数字，如 aaa）")
+	}
+	if !tenantSlugRe.MatchString(s) {
+		return "", fmt.Errorf("slug 须为 2–32 位，小写字母开头，仅含 a-z / 0-9 / -")
+	}
+	if _, bad := reservedTenantSlugs[s]; bad {
+		return "", fmt.Errorf("slug %q 为系统保留字", s)
+	}
+	return s, nil
+}
+
+// SuggestTenantSlug 从公司名生成候选（中文名可能得不到可用 slug，需人工填写）。
+func SuggestTenantSlug(name string) string {
+	name = strings.TrimSpace(name)
+	if name == "" {
+		return ""
+	}
+	// 纯 ASCII 名：直接规范化
+	ascii := true
+	for _, r := range name {
+		if r > unicode.MaxASCII {
+			ascii = false
+			break
+		}
+	}
+	if ascii {
+		s, err := NormalizeTenantSlug(name)
+		if err == nil {
+			return s
+		}
+	}
+	return ""
+}