chore: use common header parsing

internal/pf/http.go

@@ -7,6 +7,8 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+
+	commonmw "gitea.estateliga.work/admin/portal-common/middleware"
 )
 
 type Server struct {
@@ -510,11 +512,11 @@ func portalUserID(r *http.Request) string {
 }
 
 func isAdmin(r *http.Request) bool {
-	return r.Header.Get("X-User-Is-Admin") == "1"
+	return commonmw.HeaderBool(r, "X-User-Is-Admin")
 }
 
 func canViewTeam(r *http.Request) bool {
-	return isAdmin(r) || r.Header.Get("X-User-Is-Department-Head") == "1"
+	return isAdmin(r) || commonmw.HeaderBool(r, "X-User-Is-Department-Head")
 }
 
 func canManagePortalUser(r *http.Request, targetPortalID string) bool {
@@ -534,19 +536,7 @@ func canManagePortalUser(r *http.Request, targetPortalID string) bool {
 }
 
 func subordinatePortalIDs(r *http.Request) []string {
-	raw := strings.TrimSpace(r.Header.Get("X-User-Subordinates"))
-	if raw == "" {
-		return []string{}
-	}
-	parts := strings.Split(raw, ",")
-	out := make([]string, 0, len(parts))
-	for _, part := range parts {
-		id := strings.TrimSpace(part)
-		if id != "" {
-			out = append(out, id)
-		}
-	}
-	return out
+	return commonmw.HeaderCSV(r, "X-User-Subordinates")
 }
 
 func ownerPortalIDFromQuery(r *http.Request) *string {