Device cleanup (#592)

- Replaced device_find_\* usage by device_get_\* variants.
- Removed deprecated device_find_\* functions.
- Improved reliability of Bluetooth scanning, pairing, connection, and HID host lifecycle behavior, including peer auto-connect handling.
- Improved Bluetooth/USB status indicators and clarified “Eject failed” alerts with the affected mount path.

Tactility/Source/app/btmanage/View.cpp

@@ -46,8 +46,12 @@ static void onEnableOnBootParentClicked(lv_event_t* event) {
 
 static void onScanButtonClicked(lv_event_t* event) {
     auto bt = std::static_pointer_cast<BtManage>(getCurrentApp());
-    Device* dev = device_find_first_active_by_type(&BLUETOOTH_TYPE);
+    Device* dev = nullptr;
+    device_get_first_active_by_type(&BLUETOOTH_TYPE, &dev);
     bool scanning = dev ? bluetooth_is_scanning(dev) : false;
+    if (dev) {
+        device_put(dev);
+    }
     bt->getBindings().onScanToggled(!scanning);
 }