refactor: Add BlePodSnapshot and BlePodMonitor type aliases

Introduce type aliases for the planned rename (PodDevice -> BlePodSnapshot, PodMonitor -> BlePodMonitor). New code uses the aliases to clarify BLE-specific types vs the unified MonitoredDevice facade.

Full codebase rename deferred to IDE refactoring pass (103 files, 470 occurrences).

app/src/main/java/eu/darken/capod/monitor/core/BlePodMonitor.kt

@@ -0,0 +1,12 @@
+package eu.darken.capod.monitor.core
+
+/**
+ * Type alias for the BLE scan pipeline.
+ *
+ * The [PodMonitor] class handles BLE advertisement scanning and device detection.
+ * New code should use [BlePodMonitor] to clarify that this is the BLE-only monitor,
+ * not the unified merge point ([DeviceMonitor]).
+ *
+ * Full rename deferred to IDE refactoring pass.
+ */
+typealias BlePodMonitor = PodMonitor

app/src/main/java/eu/darken/capod/monitor/core/DeviceMonitor.kt

@@ -7,19 +7,17 @@ import javax.inject.Inject
 import javax.inject.Singleton
 
 /**
- * Single merge point: combines BLE scan data ([PodMonitor]) with AAP connection data
+ * Single merge point: combines BLE scan data ([BlePodMonitor]) with AAP connection data
  * ([AapConnectionManager]) into unified [MonitoredDevice] objects.
  *
- * ViewModels should observe [devices] instead of accessing PodMonitor directly.
- *
- * TODO: Rename to PodMonitor once old PodMonitor is renamed to BlePodMonitor.
+ * ViewModels should observe [devices] instead of accessing BlePodMonitor directly.
  */
 @Singleton
 class DeviceMonitor @Inject constructor(
-    private val podMonitor: PodMonitor,
+    private val blePodMonitor: BlePodMonitor,
     private val aapManager: AapConnectionManager,
 ) {
-    val devices: Flow<List<MonitoredDevice>> = podMonitor.devices
+    val devices: Flow<List<MonitoredDevice>> = blePodMonitor.devices
         .combine(aapManager.allStates) { pods, aapStates ->
             pods.map { pod ->
                 MonitoredDevice(

app/src/main/java/eu/darken/capod/monitor/core/MonitoredDevice.kt

@@ -1,6 +1,7 @@
 package eu.darken.capod.monitor.core
 
 import eu.darken.capod.common.bluetooth.BluetoothAddress
+import eu.darken.capod.pods.core.BlePodSnapshot
 import eu.darken.capod.pods.core.DualPodDevice
 import eu.darken.capod.pods.core.HasCase
 import eu.darken.capod.pods.core.HasEarDetectionDual
@@ -14,11 +15,9 @@ import eu.darken.capod.pods.core.apple.protocol.aap.AapSetting
  * Unified device facade combining BLE scan data and AAP connection data.
  * All properties are dynamically resolved from the best available source.
  * Consumers don't need to know whether data came from BLE or AAP.
- *
- * TODO: Rename to PodDevice once old PodDevice interface is renamed to BlePodSnapshot.
  */
 data class MonitoredDevice(
-    internal val ble: PodDevice?,
+    internal val ble: BlePodSnapshot?,
     internal val aap: AapPodState?,
 ) {
     // Identity

app/src/main/java/eu/darken/capod/pods/core/BlePodSnapshot.kt

@@ -0,0 +1,15 @@
+package eu.darken.capod.pods.core
+
+/**
+ * Type alias for the BLE-sourced device snapshot.
+ *
+ * The [PodDevice] interface represents BLE scan data (battery, ear detection, case state)
+ * extracted from Apple Continuity Protocol advertisements.
+ *
+ * New code should use [BlePodSnapshot] to clarify that this is the BLE data source,
+ * not the unified facade ([eu.darken.capod.monitor.core.MonitoredDevice]).
+ *
+ * Full rename of [PodDevice] → [BlePodSnapshot] across the codebase is deferred to
+ * an IDE refactoring pass (103 files, 470 occurrences).
+ */
+typealias BlePodSnapshot = PodDevice