added back phase toggle button

app/src/main/java/com/example/jnicpp/bowling/BowlingCameraActivity.kt

@@ -79,6 +79,16 @@ class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
     // class for FeedbackUI
     private lateinit var feedbackUI: FeedbackUI
 
+    private val stepLabels = listOf(
+        R.string.pose_phase_starting_stance,
+        R.string.pose_phase_approach,
+        R.string.pose_phase_pushaway,
+        R.string.pose_phase_back_swing,
+        R.string.pose_phase_power_step,
+        R.string.pose_phase_slide_and_release,
+    )
+    private var currentPhaseToggleIndex = 0
+
     private val permissionLauncher =
         registerForActivityResult(ActivityResultContracts.RequestMultiplePermissions()) { _: Map<String, Boolean> ->
             val granted = CameraPermissions.allGranted(this)
@@ -134,6 +144,7 @@ class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
             }
         }
         binding.btnResetCounter.setOnClickListener { viewModel.resetStepCounter() }
+        binding.btnShowStep.setOnClickListener { onPhaseToggleClicked() }
 
         observeViewModel()
 
@@ -550,4 +561,12 @@ class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
         cameraExecutor.shutdown()
         debugSessionLogger.stop()
     }
+
+    /**
+     * @brief Cycles through the delivery phase labels on the manual toggle button.
+     */
+    private fun onPhaseToggleClicked() {
+        currentPhaseToggleIndex = (currentPhaseToggleIndex + 1) % stepLabels.size
+        binding.btnShowStep.setText(stepLabels[currentPhaseToggleIndex])
+    }
 }