fix: harden license lifecycle (#547)

go-backend/internal/store/repo/config_policy.go

@@ -15,14 +15,27 @@ var publicConfigKeys = map[string]struct{}{
 	"app_favicon":         {},
 	"app_bg_image":        {},
 	"cloudflare_site_key": {},
+	"is_commercial":       {},
+	"hide_footer_brand":   {},
 }
 
 var sensitiveConfigKeys = map[string]struct{}{
 	"jwt_secret":            {},
 	"license_key":           {},
+	"license_expiry":        {},
+	"license_machine_id":    {},
+	"machine_fingerprint":   {},
 	"cloudflare_secret_key": {},
 }
 
+var systemManagedConfigKeys = map[string]struct{}{
+	"license_key":         {},
+	"license_expiry":      {},
+	"license_machine_id":  {},
+	"is_commercial":       {},
+	"machine_fingerprint": {},
+}
+
 func PolicyForConfig(name string) ConfigAccessPolicy {
 	if IsPublicConfigKey(name) {
 		return ConfigAccessPublic
@@ -43,6 +56,11 @@ func IsSensitiveConfigKey(name string) bool {
 	return ok
 }
 
+func IsSystemManagedConfigKey(name string) bool {
+	_, ok := systemManagedConfigKeys[normalizeConfigKey(name)]
+	return ok
+}
+
 func FilterSensitiveConfigs(in map[string]string) map[string]string {
 	if len(in) == 0 {
 		return map[string]string{}
@@ -57,6 +75,20 @@ func FilterSensitiveConfigs(in map[string]string) map[string]string {
 	return out
 }
 
+func FilterBackupConfigs(in map[string]string) map[string]string {
+	if len(in) == 0 {
+		return map[string]string{}
+	}
+	out := make(map[string]string, len(in))
+	for name, value := range in {
+		if IsSensitiveConfigKey(name) || IsSystemManagedConfigKey(name) {
+			continue
+		}
+		out[name] = value
+	}
+	return out
+}
+
 func normalizeConfigKey(name string) string {
 	return strings.ToLower(strings.TrimSpace(name))
 }