Link device list and proximity radar selection

Clicking a device in the list or a dot on the radar now highlights
both - the list row gets selected styling and the radar dot shows
an animated pulsing cyan ring for clear visual feedback.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

static/js/modes/bluetooth.js

@@ -385,6 +385,11 @@ const BluetoothMode = (function() {
                 el.classList.remove('selected');
             });
         }
+
+        // Clear radar highlight
+        if (typeof ProximityRadar !== 'undefined') {
+            ProximityRadar.clearHighlight();
+        }
     }
 
     /**
@@ -404,6 +409,12 @@ const BluetoothMode = (function() {
         if (card) {
             card.classList.add('selected');
         }
+
+        // Also highlight on the radar
+        const device = devices.get(deviceId);
+        if (device && typeof ProximityRadar !== 'undefined') {
+            ProximityRadar.highlightDevice(device.device_key || device.device_id);
+        }
     }
 
     /**