feat(watch): display water lock status indicator during workout

targets/watch/WorkoutManager.swift

@@ -41,6 +41,9 @@ class WorkoutManager: NSObject, ObservableObject, HKLiveWorkoutBuilderDelegate {
     @Published var lapDetected = false
     @Published var healthKitAuthorized = false
     @Published var isPaused = false
+    @Published var isWaterLockEnabled = false
+
+    private var waterLockCheckTimer: Timer?
 
     override init() {
         super.init()
@@ -163,6 +166,7 @@ class WorkoutManager: NSObject, ObservableObject, HKLiveWorkoutBuilderDelegate {
         DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
             WKInterfaceDevice.current().enableWaterLock()
         }
+        startWaterLockCheck()
         WKInterfaceDevice.current().play(.start)
     }
 
@@ -189,6 +193,7 @@ class WorkoutManager: NSObject, ObservableObject, HKLiveWorkoutBuilderDelegate {
         restTimer?.invalidate()
         isWorkoutActive = false
 
+        stopWaterLockCheck()
         stopLapDetection()
         stopHeartRateQuery()
         stopCalorieQuery()
@@ -199,6 +204,23 @@ class WorkoutManager: NSObject, ObservableObject, HKLiveWorkoutBuilderDelegate {
         WKInterfaceDevice.current().play(.success)
     }
 
+    // MARK: - Water Lock Check
+
+    private func startWaterLockCheck() {
+        isWaterLockEnabled = WKInterfaceDevice.current().isWaterLockEnabled
+        waterLockCheckTimer = Timer.scheduledTimer(withTimeInterval: 1.5, repeats: true) { [weak self] _ in
+            DispatchQueue.main.async {
+                self?.isWaterLockEnabled = WKInterfaceDevice.current().isWaterLockEnabled
+            }
+        }
+    }
+
+    private func stopWaterLockCheck() {
+        waterLockCheckTimer?.invalidate()
+        waterLockCheckTimer = nil
+        isWaterLockEnabled = false
+    }
+
     // MARK: - Workout Summary
 
     private func createWorkoutSummary() {