iOS: add push-to-talk node commands

apps/shared/OpenClawKit/Sources/OpenClawKit/TalkCommands.swift

@@ -0,0 +1,26 @@
+import Foundation
+
+public enum OpenClawTalkCommand: String, Codable, Sendable {
+    case pttStart = "talk.ptt.start"
+    case pttStop = "talk.ptt.stop"
+}
+
+public struct OpenClawTalkPTTStartPayload: Codable, Sendable, Equatable {
+    public var captureId: String
+
+    public init(captureId: String) {
+        self.captureId = captureId
+    }
+}
+
+public struct OpenClawTalkPTTStopPayload: Codable, Sendable, Equatable {
+    public var captureId: String
+    public var transcript: String?
+    public var status: String
+
+    public init(captureId: String, transcript: String?, status: String) {
+        self.captureId = captureId
+        self.transcript = transcript
+        self.status = status
+    }
+}