Distinguish unknown proximity from confirmed far before speaker changes

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallAudioRouter.kt

@@ -141,19 +141,19 @@ class CallAudioRouter {
         LogManager.addLog("INFO", "CallAudioRouter", "stopped")
     }
 
-    fun setRoute(r: AudioRoute, preferWired: Boolean = false) {
+    fun setRoute(r: AudioRoute, preferWired: Boolean = false, automatic: Boolean = false) {
         if (r == AudioRoute.HEADSET && !headsetAvailable) {
             LogManager.addLog("WARN", "CallAudioRouter", "setRoute HEADSET rejected: no headset available")
             return
         }
-        autoHeadset = false
+        if (!automatic) autoHeadset = false
         val preferenceChanged = preferWiredHeadset != preferWired
         preferWiredHeadset = preferWired
         if (route == r && !preferenceChanged) return
         route = r
         preferredRoute = r
         applyRoute(r)
-        LogManager.addLog("INFO", "CallAudioRouter", "route -> $r (headsetAvailable=$headsetAvailable)")
+        LogManager.addLog("INFO", "CallAudioRouter", "route -> $r (headsetAvailable=$headsetAvailable automatic=$automatic)")
         onChanged?.invoke(route, headsetAvailable)
     }
 

tools/chatgui-android/app/src/main/java/com/utun/chat/data/ProximityManager.kt

@@ -21,8 +21,9 @@ class ProximityManager(private val context: Context) {
         context.getSystemService(Context.SENSOR_SERVICE) as SensorManager
     private val sensor: Sensor? = sensorManager.getDefaultSensor(Sensor.TYPE_PROXIMITY)
 
-    private val _near = MutableStateFlow(false)
-    val near: StateFlow<Boolean> = _near
+    // null — первое показание ещё не получено; это не подтверждённое FAR.
+    private val _near = MutableStateFlow<Boolean?>(null)
+    val near: StateFlow<Boolean?> = _near
 
     private var listener: SensorEventListener? = null
     private var started = false
@@ -37,6 +38,7 @@ class ProximityManager(private val context: Context) {
         val s = sensor
         if (s == null) {
             LogManager.addLog("WARN", "Proximity", "no proximity sensor on this device")
+            _near.value = false
             return
         }
         val l = object : SensorEventListener {
@@ -52,16 +54,20 @@ class ProximityManager(private val context: Context) {
             override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) {}
         }
         listener = l
-        sensorManager.registerListener(l, s, SensorManager.SENSOR_DELAY_NORMAL)
+        if (!sensorManager.registerListener(l, s, SensorManager.SENSOR_DELAY_NORMAL)) {
+            listener = null; started = false
+            LogManager.addLog("WARN", "Proximity", "sensor registration failed; proximity remains unknown")
+            return
+        }
         LogManager.addLog("INFO", "Proximity", "started (maxRange=${s.maximumRange})")
     }
 
     fun stop() {
+        _near.value = null
         if (!started) return
         started = false
         listener?.let { sensorManager.unregisterListener(it) }
         listener = null
-        _near.value = false
         LogManager.addLog("INFO", "Proximity", "stopped")
     }
 }