iOS: allow unicast DNS-SD discovery domain

apps/shared/ClawdisKit/Sources/ClawdisKit/BonjourTypes.swift

@@ -4,4 +4,18 @@ public enum ClawdisBonjour {
     // v0: internal-only, subject to rename.
     public static let bridgeServiceType = "_clawdis-bridge._tcp"
     public static let bridgeServiceDomain = "local."
+
+    public static func normalizeServiceDomain(_ raw: String?) -> String {
+        let trimmed = (raw ?? "").trimmingCharacters(in: .whitespacesAndNewlines)
+        if trimmed.isEmpty {
+            return self.bridgeServiceDomain
+        }
+
+        let lower = trimmed.lowercased()
+        if lower == "local" || lower == "local." {
+            return self.bridgeServiceDomain
+        }
+
+        return lower.hasSuffix(".") ? lower : (lower + ".")
+    }
 }