refactor(apple): share AsyncTimeout helper

apps/shared/ClawdbotKit/Sources/ClawdbotKit/AsyncTimeout.swift

@@ -0,0 +1,36 @@
+import Foundation
+
+public enum AsyncTimeout {
+    public static func withTimeout<T: Sendable>(
+        seconds: Double,
+        onTimeout: @escaping @Sendable () -> Error,
+        operation: @escaping @Sendable () async throws -> T) async throws -> T
+    {
+        let clamped = max(0, seconds)
+        if clamped == 0 {
+            return try await operation()
+        }
+
+        return try await withThrowingTaskGroup(of: T.self) { group in
+            group.addTask { try await operation() }
+            group.addTask {
+                try await Task.sleep(nanoseconds: UInt64(clamped * 1_000_000_000))
+                throw onTimeout()
+            }
+            let result = try await group.next()
+            group.cancelAll()
+            if let result { return result }
+            throw onTimeout()
+        }
+    }
+
+    public static func withTimeoutMs<T: Sendable>(
+        timeoutMs: Int,
+        onTimeout: @escaping @Sendable () -> Error,
+        operation: @escaping @Sendable () async throws -> T) async throws -> T
+    {
+        let clamped = max(0, timeoutMs)
+        let seconds = Double(clamped) / 1000.0
+        return try await self.withTimeout(seconds: seconds, onTimeout: onTimeout, operation: operation)
+    }
+}