feat: add device authentication, place gates support, and PiP navigation features

apps/siro_maps/lib/data/models/place_model.dart

@@ -1,3 +1,5 @@
+import 'place_gate.dart';
+
 class PlaceModel {
   final String id;
   final String name;
@@ -7,6 +9,7 @@ class PlaceModel {
   final double elevationMeters; // GPS Altitude AMSL in meters (defaults to 0.0)
   final double? distanceKm;
   final String? address;
+  final List<PlaceGate> gates;
 
   PlaceModel({
     required this.id,
@@ -17,8 +20,11 @@ class PlaceModel {
     this.elevationMeters = 0.0,
     this.distanceKm,
     this.address,
+    this.gates = const [],
   });
 
+  bool get hasGates => gates.isNotEmpty;
+
   factory PlaceModel.fromJson(Map<String, dynamic> json) {
     final rawElev = json['elevation_meters'] ?? json['elevation'] ?? json['altitude'] ?? 0.0;
     double elev = 0.0;
@@ -28,6 +34,14 @@ class PlaceModel {
       elev = double.tryParse(rawElev.toString()) ?? 0.0;
     }
 
+    final rawGates = json['gates'];
+    List<PlaceGate> parsedGates = [];
+    if (rawGates is List) {
+      parsedGates = rawGates
+          .map((g) => PlaceGate.fromJson(Map<String, dynamic>.from(g)))
+          .toList();
+    }
+
     return PlaceModel(
       id: json['id']?.toString() ?? '',
       name: json['name']?.toString() ?? '',
@@ -39,6 +53,7 @@ class PlaceModel {
           ? (json['distanceKm'] as num).toDouble()
           : null,
       address: json['address']?.toString() ?? json['neighborhood']?.toString(),
+      gates: parsedGates,
     );
   }
 
@@ -52,6 +67,7 @@ class PlaceModel {
       'elevation_meters': elevationMeters,
       'altitude': elevationMeters,
       if (address != null) 'address': address,
+      if (gates.isNotEmpty) 'gates': gates.map((g) => g.toJson()).toList(),
     };
   }
 }