fix: filter scanner BT MACs in API responses

- /api/latest now filters out devices matching peer bt_mac
- Prevents scanner devices from appearing in scan results

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

src/rf_mapper/web/app.py

@@ -666,10 +666,17 @@ def create_app(config: Config | None = None) -> Flask:
         with open(scan_files[0]) as f:
             scan = json.load(f)
 
-        # Get saved floor assignments from database
+        # Get saved floor assignments and scanner BT MACs from database
         db = app.config.get("DATABASE")
         saved_floors = db.get_all_device_floors() if db else {}
 
+        # Get scanner BT MACs to filter out
+        scanner_bt_macs = set()
+        if db:
+            for peer in db.get_peers():
+                if peer.get("bt_mac"):
+                    scanner_bt_macs.add(peer["bt_mac"].upper())
+
         # Enrich with distance estimates and saved floor assignments
         for net in scan.get("wifi_networks", []):
             net["estimated_distance_m"] = round(estimate_distance(net["rssi"]), 2)
@@ -678,12 +685,18 @@ def create_app(config: Config | None = None) -> Flask:
             if "height_m" not in net:
                 net["height_m"] = None
 
+        # Filter out scanner devices and enrich BT devices
+        filtered_bt = []
         for dev in scan.get("bluetooth_devices", []):
+            address = dev.get("address", "").upper()
+            if address in scanner_bt_macs:
+                continue  # Skip scanner devices
             dev["estimated_distance_m"] = round(estimate_distance(dev["rssi"], tx_power=-65), 2)
-            address = dev.get("address")
-            dev["floor"] = saved_floors.get(address) if address else dev.get("floor")
+            dev["floor"] = saved_floors.get(dev.get("address")) if dev.get("address") else dev.get("floor")
             if "height_m" not in dev:
                 dev["height_m"] = None
+            filtered_bt.append(dev)
+        scan["bluetooth_devices"] = filtered_bt
 
         scan["gps"] = {
             "lat": app.config["CURRENT_LAT"],