refactor(swift): share discovery status text

apps/shared/OpenClawKit/Sources/OpenClawKit/GatewayDiscoveryStatusText.swift

@@ -0,0 +1,39 @@
+import Foundation
+import Network
+
+public enum GatewayDiscoveryStatusText {
+    public static func make(states: [NWBrowser.State], hasBrowsers: Bool) -> String {
+        if states.isEmpty {
+            return hasBrowsers ? "Setup" : "Idle"
+        }
+
+        if let failed = states.first(where: { state in
+            if case .failed = state { return true }
+            return false
+        }) {
+            if case let .failed(err) = failed {
+                return "Failed: \(err)"
+            }
+        }
+
+        if let waiting = states.first(where: { state in
+            if case .waiting = state { return true }
+            return false
+        }) {
+            if case let .waiting(err) = waiting {
+                return "Waiting: \(err)"
+            }
+        }
+
+        if states.contains(where: { if case .ready = $0 { true } else { false } }) {
+            return "Searching…"
+        }
+
+        if states.contains(where: { if case .setup = $0 { true } else { false } }) {
+            return "Setup"
+        }
+
+        return "Searching…"
+    }
+}
+