add filter by network for legs, add full export for traction

lib/components/calculator/calculator.dart

@@ -3,6 +3,7 @@ import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 import 'package:mileograph_flutter/objects/objects.dart';
 import 'package:mileograph_flutter/services/api_service.dart';
+import 'package:mileograph_flutter/components/widgets/multi_select_filter.dart';
 import 'package:mileograph_flutter/services/data_service.dart';
 import './route_summary_widget.dart';
 
@@ -358,7 +359,7 @@ class _RouteCalculatorState extends State<RouteCalculator> {
             runSpacing: 12,
             crossAxisAlignment: WrapCrossAlignment.center,
             children: [
-              _MultiSelectFilter(
+              MultiSelectFilter(
                 label: 'Countries',
                 options: _countries,
                 selected: _selectedCountries,
@@ -367,7 +368,7 @@ class _RouteCalculatorState extends State<RouteCalculator> {
                   _loadStations();
                 },
               ),
-              _MultiSelectFilter(
+              MultiSelectFilter(
                 label: 'Networks',
                 options: _networks,
                 selected: _selectedNetworks,
@@ -375,6 +376,16 @@ class _RouteCalculatorState extends State<RouteCalculator> {
                   setState(() => _selectedNetworks = vals);
                   _loadStations();
                 },
+                onRefresh: () async {
+                  final data = context.read<DataService>();
+                  await data.fetchStationFilters();
+                  if (!mounted) return;
+                  setState(() {
+                    _networks = data.stationNetworks;
+                    _countries = data.stationCountryNetworks.keys.toList();
+                  });
+                  await _loadStations();
+                },
               ),
               if (_loadingStations)
                 const Padding(
@@ -573,159 +584,3 @@ Widget debugPanel(List<String> stations) {
     ),
   );
 }
-
-class _MultiSelectFilter extends StatefulWidget {
-  const _MultiSelectFilter({
-    required this.label,
-    required this.options,
-    required this.selected,
-    required this.onChanged,
-  });
-
-  final String label;
-  final List<String> options;
-  final List<String> selected;
-  final ValueChanged<List<String>> onChanged;
-
-  @override
-  State<_MultiSelectFilter> createState() => _MultiSelectFilterState();
-}
-
-class _MultiSelectFilterState extends State<_MultiSelectFilter> {
-  late List<String> _tempSelected;
-  String _query = '';
-
-  @override
-  void initState() {
-    super.initState();
-    _tempSelected = List.from(widget.selected);
-  }
-
-  @override
-  void didUpdateWidget(covariant _MultiSelectFilter oldWidget) {
-    super.didUpdateWidget(oldWidget);
-    if (oldWidget.selected != widget.selected) {
-      _tempSelected = List.from(widget.selected);
-    }
-  }
-
-  void _openPicker() async {
-    _tempSelected = List.from(widget.selected);
-    _query = '';
-    await showModalBottomSheet<void>(
-      context: context,
-      isScrollControlled: true,
-      builder: (ctx) {
-        return StatefulBuilder(
-          builder: (ctx, setModalState) {
-            final filtered = widget.options
-                .where((opt) =>
-                    _query.isEmpty || opt.toLowerCase().contains(_query.toLowerCase()))
-                .toList();
-            return SafeArea(
-              child: Padding(
-                padding: const EdgeInsets.all(16.0),
-                child: Column(
-                  mainAxisSize: MainAxisSize.min,
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    Row(
-                      children: [
-                        Text(
-                          'Select ${widget.label.toLowerCase()}',
-                          style: Theme.of(context).textTheme.titleMedium?.copyWith(
-                                fontWeight: FontWeight.w700,
-                              ),
-                        ),
-                        const Spacer(),
-                        TextButton(
-                          onPressed: () {
-                            setModalState(() {
-                              _tempSelected.clear();
-                            });
-                            Navigator.of(ctx).pop();
-                            widget.onChanged(const []);
-                          },
-                          child: const Text('Clear'),
-                        ),
-                      ],
-                    ),
-                    const SizedBox(height: 8),
-                    TextField(
-                      decoration: const InputDecoration(
-                        labelText: 'Search',
-                        border: OutlineInputBorder(),
-                      ),
-                      onChanged: (val) {
-                        setModalState(() {
-                          _query = val;
-                        });
-                      },
-                    ),
-                    const SizedBox(height: 12),
-                    SizedBox(
-                      height: 320,
-                      child: ListView.builder(
-                        itemCount: filtered.length,
-                        itemBuilder: (_, index) {
-                          final option = filtered[index];
-                          final selected = _tempSelected.contains(option);
-                          return CheckboxListTile(
-                            value: selected,
-                            title: Text(option),
-                            onChanged: (val) {
-                              setModalState(() {
-                                if (val == true) {
-                                  if (!_tempSelected.contains(option)) {
-                                    _tempSelected.add(option);
-                                  }
-                                } else {
-                                  _tempSelected.removeWhere((e) => e == option);
-                                }
-                              });
-                              widget.onChanged(List.from(_tempSelected.toSet()));
-                            },
-                          );
-                        },
-                      ),
-                    ),
-                    const SizedBox(height: 12),
-                    Align(
-                      alignment: Alignment.centerRight,
-                      child: FilledButton.icon(
-                        onPressed: () {
-                          widget.onChanged(List.from(_tempSelected.toSet()));
-                          Navigator.of(ctx).pop();
-                        },
-                        icon: const Icon(Icons.check),
-                        label: const Text('Apply'),
-                      ),
-                    ),
-                  ],
-                ),
-              ),
-            );
-          },
-        );
-      },
-    );
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final hasSelection = widget.selected.isNotEmpty;
-    final display =
-        hasSelection ? widget.selected.join(', ') : 'Any ${widget.label.toLowerCase()}';
-    return OutlinedButton.icon(
-      onPressed: _openPicker,
-      icon: const Icon(Icons.filter_alt),
-      label: SizedBox(
-        width: 180,
-        child: Text(
-          '${widget.label}: $display',
-          overflow: TextOverflow.ellipsis,
-        ),
-      ),
-    );
-  }
-}

lib/components/login/login.dart

@@ -95,21 +95,7 @@ class _LoginScreenState extends State<LoginScreen> {
                           );
                         },
                       ),
-                      const SizedBox(height: 50),
-                      const LoginPanel(),
-                      const SizedBox(height: 16),
-                      IconButton(
-                        icon: const Icon(Icons.settings, color: Colors.grey),
-                        tooltip: 'Settings',
-                        onPressed: () {
-                          Navigator.of(context).push(
-                            MaterialPageRoute(
-                              fullscreenDialog: true,
-                              builder: (_) => const SettingsPage(),
-                            ),
-                          );
-                        },
-                      ),
+                      const SizedBox(height: 40),
                       if (_checkingSession) ...[
                         const SizedBox(height: 12),
                         Row(
@@ -127,6 +113,22 @@ class _LoginScreenState extends State<LoginScreen> {
                             ),
                           ],
                         ),
+                      ] else ...[
+                        const SizedBox(height: 10),
+                        const LoginPanel(),
+                        const SizedBox(height: 16),
+                        IconButton(
+                          icon: const Icon(Icons.settings, color: Colors.grey),
+                          tooltip: 'Settings',
+                          onPressed: () {
+                            Navigator.of(context).push(
+                              MaterialPageRoute(
+                                fullscreenDialog: true,
+                                builder: (_) => const SettingsPage(),
+                              ),
+                            );
+                          },
+                        ),
                       ],
                     ],
                   ),

lib/components/pages/legs.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:mileograph_flutter/components/legs/leg_card.dart';
+import 'package:mileograph_flutter/components/widgets/multi_select_filter.dart';
 import 'package:mileograph_flutter/objects/objects.dart';
 import 'package:mileograph_flutter/services/data_service.dart';
 import 'package:mileograph_flutter/services/distance_unit_service.dart';
@@ -19,6 +20,9 @@ class _LegsPageState extends State<LegsPage> {
   bool _initialised = false;
   bool _unallocatedOnly = false;
   bool _showMoreFilters = false;
+  bool _loadingNetworks = false;
+  List<String> _availableNetworks = [];
+  List<String> _selectedNetworks = [];
 
   @override
   void didChangeDependencies() {
@@ -26,9 +30,21 @@ class _LegsPageState extends State<LegsPage> {
     if (!_initialised) {
       _initialised = true;
       _refreshLegs();
+      _loadNetworks();
     }
   }
 
+  Future<void> _loadNetworks() async {
+    setState(() => _loadingNetworks = true);
+    final data = context.read<DataService>();
+    await data.fetchStationNetworks();
+    if (!mounted) return;
+    setState(() {
+      _availableNetworks = data.stationNetworks;
+      _loadingNetworks = false;
+    });
+  }
+
   Future<void> _refreshLegs() async {
     final data = context.read<DataService>();
     await data.fetchLegs(
@@ -36,6 +52,7 @@ class _LegsPageState extends State<LegsPage> {
       dateRangeStart: _formatDate(_startDate),
       dateRangeEnd: _formatDate(_endDate),
       unallocatedOnly: _unallocatedOnly,
+      networkFilter: _selectedNetworks,
     );
   }
 
@@ -48,6 +65,7 @@ class _LegsPageState extends State<LegsPage> {
       offset: data.legs.length,
       append: true,
       unallocatedOnly: _unallocatedOnly,
+      networkFilter: _selectedNetworks,
     );
   }
 
@@ -90,6 +108,7 @@ class _LegsPageState extends State<LegsPage> {
       _sortDirection = 0;
       _unallocatedOnly = false;
       _showMoreFilters = false;
+      _selectedNetworks = [];
     });
     _refreshLegs();
   }
@@ -209,6 +228,16 @@ class _LegsPageState extends State<LegsPage> {
                         spacing: 12,
                         runSpacing: 12,
                         children: [
+                          MultiSelectFilter(
+                            label: 'Networks',
+                            options: _availableNetworks,
+                            selected: _selectedNetworks,
+                            onChanged: (vals) async {
+                              setState(() => _selectedNetworks = vals);
+                              await _refreshLegs();
+                            },
+                            onRefresh: _loadingNetworks ? null : _loadNetworks,
+                          ),
                           FilterChip(
                             avatar: const Icon(Icons.flash_off),
                             label: const Text('Unallocated only'),
@@ -218,6 +247,15 @@ class _LegsPageState extends State<LegsPage> {
                               await _refreshLegs();
                             },
                           ),
+                          if (_loadingNetworks)
+                            const Padding(
+                              padding: EdgeInsets.only(left: 8.0),
+                              child: SizedBox(
+                                height: 20,
+                                width: 20,
+                                child: CircularProgressIndicator(strokeWidth: 2),
+                              ),
+                            ),
                         ],
                       ),
                     ),

lib/components/pages/traction/traction_page.dart

@@ -1,6 +1,7 @@
 part of 'traction.dart';
 
 enum _TractionMoreAction {
+  exportResults,
   classStats,
   classLeaderboard,
   adminPending,
@@ -68,14 +69,14 @@ class _TractionPageState extends State<TractionPage> {
   _ClassLeaderboardScope _classLeaderboardScope = _ClassLeaderboardScope.global;
 
   final Map<String, TextEditingController> _dynamicControllers = {};
-  final Map<String, String?> _enumSelections = {};
+  final Map<String, dynamic> _enumSelections = {};
   bool _restoredFromPrefs = false;
   static const int _pageSize = 100;
   int _lastTractionOffset = 0;
   String? _lastQuerySignature;
   String? _transferFromLabel;
   bool _isSearching = false;
-  bool _classExporting = false;
+  bool _exporting = false;
 
   @override
   void initState() {
@@ -169,12 +170,7 @@ class _TractionPageState extends State<TractionPage> {
     ].join(';');
   }
 
-  Future<void> _refreshTraction({
-    bool append = false,
-    bool preservePosition = true,
-  }) async {
-    _setState(() => _isSearching = true);
-    final data = context.read<DataService>();
+  Map<String, dynamic> _buildTractionFilters() {
     final filters = <String, dynamic>{};
     final name = _nameController.text.trim();
     if (name.isNotEmpty) filters['name'] = name;
@@ -187,6 +183,16 @@ class _TractionPageState extends State<TractionPage> {
         filters[key] = value;
       }
     });
+    return filters;
+  }
+
+  Future<void> _refreshTraction({
+    bool append = false,
+    bool preservePosition = true,
+  }) async {
+    _setState(() => _isSearching = true);
+    final data = context.read<DataService>();
+    final filters = _buildTractionFilters();
     final hadOnly = !_hasFilters;
     final signature = _tractionQuerySignature(filters, hadOnly);
     final queryChanged =
@@ -673,23 +679,6 @@ class _TractionPageState extends State<TractionPage> {
     );
 
     final hasClassActions = _hasClassQuery;
-    final classLabel = _currentClassLabel;
-
-    final exportClassButton = !hasClassActions
-        ? null
-        : FilledButton.tonalIcon(
-            onPressed: _classExporting ? null : _exportSelectedClass,
-            icon: _classExporting
-                ? const SizedBox(
-                    height: 16,
-                    width: 16,
-                    child: CircularProgressIndicator(strokeWidth: 2),
-                  )
-                : const Icon(Icons.download),
-            label: Text(
-              _classExporting ? 'Exporting...' : 'Export $classLabel',
-            ),
-          );
 
     final newTractionButton = FilledButton.icon(
       onPressed: () async {
@@ -710,7 +699,7 @@ class _TractionPageState extends State<TractionPage> {
     );
 
     final hasAdminActions = isElevated;
-    final hasMoreMenu = hasClassActions || hasAdminActions;
+    final hasMoreMenu = true;
 
     final moreButton = !hasMoreMenu
         ? null
@@ -718,6 +707,9 @@ class _TractionPageState extends State<TractionPage> {
             tooltip: 'More options',
             onSelected: (action) async {
               switch (action) {
+                case _TractionMoreAction.exportResults:
+                  await _exportTractionResults();
+                  break;
                 case _TractionMoreAction.classStats:
                   _toggleClassStatsPanel();
                   break;
@@ -759,6 +751,25 @@ class _TractionPageState extends State<TractionPage> {
             },
             itemBuilder: (context) {
               final items = <PopupMenuEntry<_TractionMoreAction>>[];
+              items.add(
+                PopupMenuItem(
+                  value: _TractionMoreAction.exportResults,
+                  child: Row(
+                    children: [
+                      if (_exporting)
+                        const SizedBox(
+                          height: 16,
+                          width: 16,
+                          child: CircularProgressIndicator(strokeWidth: 2),
+                        )
+                      else
+                        const Icon(Icons.download, size: 18),
+                      const SizedBox(width: 8),
+                      Text(_exporting ? 'Exporting...' : 'Export'),
+                    ],
+                  ),
+                ),
+              );
               if (hasClassActions) {
                 items.add(
                   PopupMenuItem(
@@ -847,14 +858,12 @@ class _TractionPageState extends State<TractionPage> {
 
     final desktopActions = [
       refreshButton,
-      if (exportClassButton != null) exportClassButton,
       newTractionButton,
       if (moreButton != null) moreButton,
     ];
 
     final mobileActions = [
       if (moreButton != null) moreButton,
-      if (exportClassButton != null) exportClassButton,
       newTractionButton,
       refreshButton,
     ];
@@ -882,23 +891,36 @@ class _TractionPageState extends State<TractionPage> {
     );
   }
 
-  Future<void> _exportSelectedClass() async {
-    if (_classExporting) return;
-    final classLabel = _currentClassLabel;
-    if (classLabel.isEmpty) return;
-    setState(() => _classExporting = true);
+  Future<void> _exportTractionResults() async {
+    if (_exporting) return;
+    setState(() => _exporting = true);
     final messenger = ScaffoldMessenger.of(context);
     try {
       final data = context.read<DataService>();
-      final encodedClass = Uri.encodeComponent(classLabel);
-      final response = await data.api.getBytes(
-        '/loco/class/export/$encodedClass',
+      final filters = _buildTractionFilters();
+      final hadOnly = !_hasFilters;
+      final limit = data.traction.length;
+      final params = StringBuffer('?limit=$limit&offset=0');
+      if (hadOnly) params.write('&had_only=true');
+      if (!_mileageFirst) params.write('&mileage_first=false');
+
+      final payload = <String, dynamic>{};
+      final classLabel = (_selectedClass ?? _classController.text).trim();
+      if (classLabel.isNotEmpty) payload['class'] = classLabel;
+      final numberLabel = _numberController.text.trim();
+      if (numberLabel.isNotEmpty) payload['number'] = numberLabel;
+      filters.forEach((key, value) {
+        if (value == null) return;
+        if (value is String && value.trim().isEmpty) return;
+        payload[key] = value;
+      });
+
+      final response = await data.api.postBytes(
+        '/locos/search/v2/export${params.toString()}',
+        payload.isEmpty ? null : payload,
         headers: const {'accept': '*/*'},
       );
-      final safeClassName =
-          classLabel.replaceAll(RegExp(r'[^a-zA-Z0-9-_]+'), '_');
-      final fallbackName = 'traction-${safeClassName.isEmpty ? 'class' : safeClassName}.xlsx';
-      final filename = response.filename ?? fallbackName;
+      final filename = response.filename ?? 'traction-export.xlsx';
       final saveResult = await saveBytes(
         Uint8List.fromList(response.bytes),
         filename,
@@ -932,7 +954,7 @@ class _TractionPageState extends State<TractionPage> {
         SnackBar(content: Text('Export failed: $e')),
       );
     } finally {
-      if (mounted) setState(() => _classExporting = false);
+      if (mounted) setState(() => _exporting = false);
     }
   }
 
@@ -1847,13 +1869,44 @@ class _TractionPageState extends State<TractionPage> {
     bool isMobile,
   ) {
     final width = isMobile ? double.infinity : 220.0;
+    final type = field.type?.toLowerCase() ?? '';
+    final isBooleanField =
+        type == 'bool' || type == 'boolean' || type.contains('bool');
+    if (isBooleanField) {
+      final currentValue = _enumSelections[field.name];
+      final safeValue = currentValue is bool ? currentValue : null;
+      return SizedBox(
+        width: width,
+        child: DropdownButtonFormField<bool?>(
+          value: safeValue,
+          decoration: InputDecoration(
+            labelText: field.display,
+            border: const OutlineInputBorder(),
+          ),
+          items: const [
+            DropdownMenuItem(value: null, child: Text('Any')),
+            DropdownMenuItem(value: true, child: Text('Yes')),
+            DropdownMenuItem(value: false, child: Text('No')),
+          ],
+          onChanged: (val) {
+            setState(() {
+              _enumSelections[field.name] = val;
+            });
+            _refreshTraction();
+          },
+        ),
+      );
+    }
     if (field.enumValues != null && field.enumValues!.isNotEmpty) {
       final options = field.enumValues!
           .map((e) => e.toString())
           .toSet()
           .toList();
       final currentValue = _enumSelections[field.name];
-      final safeValue = options.contains(currentValue) ? currentValue : null;
+      final safeValue =
+          currentValue is String && options.contains(currentValue)
+              ? currentValue
+              : null;
       return SizedBox(
         width: width,
         child: DropdownButtonFormField<String?>(
@@ -1883,7 +1936,6 @@ class _TractionPageState extends State<TractionPage> {
     _dynamicControllers[field.name] = controller;
     TextInputType? inputType;
     if (field.type != null) {
-      final type = field.type!.toLowerCase();
       if (type.contains('int') ||
           type.contains('num') ||
           type.contains('double')) {

lib/components/widgets/multi_select_filter.dart

@@ -0,0 +1,166 @@
+import 'package:flutter/material.dart';
+
+class MultiSelectFilter extends StatefulWidget {
+  const MultiSelectFilter({
+    super.key,
+    required this.label,
+    required this.options,
+    required this.selected,
+    required this.onChanged,
+    this.onRefresh,
+  });
+
+  final String label;
+  final List<String> options;
+  final List<String> selected;
+  final ValueChanged<List<String>> onChanged;
+  final VoidCallback? onRefresh;
+
+  @override
+  State<MultiSelectFilter> createState() => _MultiSelectFilterState();
+}
+
+class _MultiSelectFilterState extends State<MultiSelectFilter> {
+  late List<String> _tempSelected;
+  String _query = '';
+
+  @override
+  void initState() {
+    super.initState();
+    _tempSelected = List.from(widget.selected);
+  }
+
+  @override
+  void didUpdateWidget(covariant MultiSelectFilter oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    if (oldWidget.selected != widget.selected) {
+      _tempSelected = List.from(widget.selected);
+    }
+  }
+
+  void _openPicker() async {
+    _tempSelected = List.from(widget.selected);
+    _query = '';
+    await showModalBottomSheet<void>(
+      context: context,
+      isScrollControlled: true,
+      builder: (ctx) {
+        return StatefulBuilder(
+          builder: (ctx, setModalState) {
+            final filtered = widget.options
+                .where((opt) =>
+                    _query.isEmpty || opt.toLowerCase().contains(_query.toLowerCase()))
+                .toList();
+            return SafeArea(
+              child: Padding(
+                padding: const EdgeInsets.all(16.0),
+                child: Column(
+                  mainAxisSize: MainAxisSize.min,
+                  crossAxisAlignment: CrossAxisAlignment.start,
+                  children: [
+                    Row(
+                      children: [
+                        Text(
+                          'Select ${widget.label.toLowerCase()}',
+                          style: Theme.of(context).textTheme.titleMedium?.copyWith(
+                                fontWeight: FontWeight.w700,
+                              ),
+                        ),
+                        const Spacer(),
+                        if (widget.onRefresh != null)
+                          IconButton(
+                            tooltip: 'Refresh',
+                            onPressed: widget.onRefresh,
+                            icon: const Icon(Icons.refresh),
+                          ),
+                        TextButton(
+                          onPressed: () {
+                            setModalState(() {
+                              _tempSelected.clear();
+                            });
+                            Navigator.of(ctx).pop();
+                            widget.onChanged(const []);
+                          },
+                          child: const Text('Clear'),
+                        ),
+                      ],
+                    ),
+                    const SizedBox(height: 8),
+                    TextField(
+                      decoration: const InputDecoration(
+                        labelText: 'Search',
+                        border: OutlineInputBorder(),
+                      ),
+                      onChanged: (val) {
+                        setModalState(() {
+                          _query = val;
+                        });
+                      },
+                    ),
+                    const SizedBox(height: 12),
+                    SizedBox(
+                      height: 320,
+                      child: ListView.builder(
+                        itemCount: filtered.length,
+                        itemBuilder: (_, index) {
+                          final option = filtered[index];
+                          final selected = _tempSelected.contains(option);
+                          return CheckboxListTile(
+                            value: selected,
+                            title: Text(option),
+                            onChanged: (val) {
+                              setModalState(() {
+                                if (val == true) {
+                                  if (!_tempSelected.contains(option)) {
+                                    _tempSelected.add(option);
+                                  }
+                                } else {
+                                  _tempSelected.removeWhere((e) => e == option);
+                                }
+                              });
+                              widget.onChanged(List.from(_tempSelected.toSet()));
+                            },
+                          );
+                        },
+                      ),
+                    ),
+                    const SizedBox(height: 12),
+                    Align(
+                      alignment: Alignment.centerRight,
+                      child: FilledButton.icon(
+                        onPressed: () {
+                          widget.onChanged(List.from(_tempSelected.toSet()));
+                          Navigator.of(ctx).pop();
+                        },
+                        icon: const Icon(Icons.check),
+                        label: const Text('Apply'),
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+            );
+          },
+        );
+      },
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final hasSelection = widget.selected.isNotEmpty;
+    final display =
+        hasSelection ? widget.selected.join(', ') : 'Any ${widget.label.toLowerCase()}';
+    return OutlinedButton.icon(
+      onPressed: _openPicker,
+      icon: const Icon(Icons.filter_alt),
+      label: SizedBox(
+        width: 180,
+        child: Text(
+          '${widget.label}: $display',
+          overflow: TextOverflow.ellipsis,
+        ),
+      ),
+    );
+  }
+}

lib/services/api_service.dart

@@ -119,6 +119,45 @@ class ApiService {
     return _processResponse(response);
   }
 
+  Future<ApiBinaryResponse> postBytes(
+    String endpoint,
+    dynamic data, {
+    Map<String, String>? headers,
+    bool includeAuth = true,
+    bool allowRetry = true,
+  }) async {
+    final hasBody = data != null;
+    final response = await _sendWithRetry(
+      () => _client.post(
+        Uri.parse('$baseUrl$endpoint'),
+        headers: _buildHeaders(
+          hasBody ? _jsonHeaders(headers) : headers,
+          includeAuth: includeAuth,
+        ),
+        body: hasBody ? jsonEncode(data) : null,
+      ),
+      allowRetry: allowRetry,
+    );
+
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      final contentDisposition = response.headers['content-disposition'];
+      return ApiBinaryResponse(
+        bytes: response.bodyBytes,
+        statusCode: response.statusCode,
+        contentType: response.headers['content-type'],
+        filename: _extractFilename(contentDisposition),
+      );
+    }
+
+    final body = _decodeBody(response);
+    final message = _extractErrorMessage(body);
+    throw ApiException(
+      statusCode: response.statusCode,
+      message: message,
+      body: body,
+    );
+  }
+
   Future<dynamic> postMultipartFile(
     String endpoint, {
     required List<int> bytes,

lib/services/data_service/data_service_core.dart

@@ -7,6 +7,7 @@ class _LegFetchOptions {
   final String? dateRangeStart;
   final String? dateRangeEnd;
   final bool unallocatedOnly;
+  final List<String> networkFilter;
 
   const _LegFetchOptions({
     this.limit = 100,
@@ -15,6 +16,7 @@ class _LegFetchOptions {
     this.dateRangeStart,
     this.dateRangeEnd,
     this.unallocatedOnly = false,
+    this.networkFilter = const [],
   });
 }
 
@@ -118,6 +120,7 @@ class DataService extends ChangeNotifier {
   List<String> _stationNetworks = [];
   Map<String, List<String>> _stationCountryNetworks = {};
   DateTime? _stationFiltersFetchedAt;
+  DateTime? _stationNetworksFetchedAt;
   List<String> get stationNetworks => _stationNetworks;
   Map<String, List<String>> get stationCountryNetworks =>
       _stationCountryNetworks;
@@ -391,9 +394,14 @@ class DataService extends ChangeNotifier {
     String? dateRangeEnd,
     bool append = false,
     bool unallocatedOnly = false,
+    List<String> networkFilter = const [],
   }) async {
     _isLegsLoading = true;
     if (!append) {
+      final normalizedNetworks = networkFilter
+          .map((network) => network.trim())
+          .where((network) => network.isNotEmpty)
+          .toList();
       _lastLegsFetch = _LegFetchOptions(
         limit: limit,
         sortBy: sortBy,
@@ -401,6 +409,7 @@ class DataService extends ChangeNotifier {
         dateRangeStart: dateRangeStart,
         dateRangeEnd: dateRangeEnd,
         unallocatedOnly: unallocatedOnly,
+        networkFilter: normalizedNetworks,
       );
     }
     final buffer = StringBuffer(
@@ -415,6 +424,13 @@ class DataService extends ChangeNotifier {
     if (unallocatedOnly) {
       buffer.write('&unallocated_only=true');
     }
+    final networks = networkFilter
+        .map((network) => network.trim())
+        .where((network) => network.isNotEmpty)
+        .toList();
+    for (final network in networks) {
+      buffer.write('&network_filter=${Uri.encodeQueryComponent(network)}');
+    }
     try {
       final json = await api.get('/user/legs${buffer.toString()}');
 
@@ -444,6 +460,7 @@ class DataService extends ChangeNotifier {
       dateRangeStart: _lastLegsFetch.dateRangeStart,
       dateRangeEnd: _lastLegsFetch.dateRangeEnd,
       unallocatedOnly: _lastLegsFetch.unallocatedOnly,
+      networkFilter: _lastLegsFetch.networkFilter,
     );
   }
 
@@ -669,6 +686,7 @@ class DataService extends ChangeNotifier {
     _stationNetworks = [];
     _stationCountryNetworks = {};
     _stationFiltersFetchedAt = null;
+    _stationNetworksFetchedAt = null;
     _notifications = [];
     _isNotificationsLoading = false;
     _userEntriesVisibility = 'private';
@@ -736,6 +754,9 @@ class DataService extends ChangeNotifier {
         final networks = (map['networks'] as List? ?? const [])
             .whereType<String>()
             .toList();
+        networks.sort(
+          (a, b) => a.toLowerCase().compareTo(b.toLowerCase()),
+        );
         final countryNetworksRaw =
             map['country_networks'] as Map? ?? const <String, dynamic>{};
         final countryNetworks = <String, List<String>>{};
@@ -753,6 +774,31 @@ class DataService extends ChangeNotifier {
     }
   }
 
+  Future<void> fetchStationNetworks() async {
+    final now = DateTime.now();
+    final recent = _stationNetworks.isNotEmpty &&
+        ((_stationNetworksFetchedAt != null &&
+                now.difference(_stationNetworksFetchedAt!) <
+                    const Duration(minutes: 30)) ||
+            (_stationFiltersFetchedAt != null &&
+                now.difference(_stationFiltersFetchedAt!) <
+                    const Duration(minutes: 30)));
+    if (recent) return;
+    try {
+      final response = await api.get('/stations/networks');
+      if (response is List) {
+        final networks = response.whereType<String>().toList();
+        networks.sort(
+          (a, b) => a.toLowerCase().compareTo(b.toLowerCase()),
+        );
+        _stationNetworks = networks;
+        _stationNetworksFetchedAt = now;
+      }
+    } catch (e) {
+      debugPrint('Failed to fetch station networks: $e');
+    }
+  }
+
   String _stationKey(List<String> countries, List<String> networks) {
     final c = countries..sort();
     final n = networks..sort();