feat: Cache device names and listen for property updates

Co-authored-by: aider (gemini/gemini-2.5-pro) <aider@aider.chat>

scan.py

@@ -8,12 +8,15 @@ logging.basicConfig(stream=sys.stdout,
 import asyncio
 from dbus_next.aio import MessageBus
 from dbus_next.constants import BusType
+from dbus_next import Message
 
 BLUEZ_SERVICE = 'org.bluez'
 ADAPTER_IFACE = 'org.bluez.Adapter1'
 DEVICE_IFACE = 'org.bluez.Device1'
 
+bus = None
 seen_devices = set()
+name_cache = {}
 
 async def get_adapter(bus):
     """Gets the first Bluetooth adapter found."""
@@ -32,15 +35,25 @@ def on_interfaces_added(path, interfaces):
     """Callback for when a new D-Bus interface is added."""
     if DEVICE_IFACE in interfaces:
         device_properties = interfaces[DEVICE_IFACE]
-        address = device_properties.get('Address')
-        alias = device_properties.get('Alias')
-        if address and alias and alias.value:
-            addr_str = address.value
+        address_variant = device_properties.get('Address')
+        if not address_variant:
+            return
+        
+        addr_str = address_variant.value
+        alias_variant = device_properties.get('Alias')
+        alias = alias_variant.value if alias_variant else name_cache.get(addr_str)
+
+        if alias:
+            # Update cache if we found a new alias
+            if alias_variant and alias_variant.value:
+                name_cache[addr_str] = alias_variant.value
+
             if addr_str not in seen_devices:
                 seen_devices.add(addr_str)
-                logging.info(f"Found: {alias.value} ({addr_str}) (new)")
+                logging.info(f"Found: {alias} ({addr_str}) (new)")
             else:
-                logging.info(f"Found: {alias.value} ({addr_str})")
+                # Log repeat discoveries only if they have a name
+                logging.info(f"Found: {alias} ({addr_str})")
 
 async def main():
     """Main function to run the scanner."""