Merge pull request #224 from cogwheel0/add-model-filters-support

feat(models): Add filters support and auto-validation for model-specific filters

lib/core/models/model.dart

@@ -1,4 +1,5 @@
 import 'package:freezed_annotation/freezed_annotation.dart';
+import 'toggle_filter.dart';
 
 part 'model.freezed.dart';
 
@@ -17,6 +18,10 @@ sealed class Model with _$Model {
     Map<String, dynamic>? metadata,
     List<String>? supportedParameters,
     List<String>? toolIds,
+
+    /// Toggleable filters that can be enabled/disabled per chat.
+    /// These come from OpenWebUI filters with `toggle = True`.
+    List<ToggleFilter>? filters,
   }) = _Model;
 
   factory Model.fromJson(Map<String, dynamic> json) {
@@ -147,6 +152,17 @@ sealed class Model with _$Model {
       }
     }
 
+    // Extract toggle filters from the model response
+    // These come from OpenWebUI filters with toggle=True set
+    List<ToggleFilter>? filters;
+    final filtersData = json['filters'];
+    if (filtersData is List && filtersData.isNotEmpty) {
+      filters = filtersData
+          .whereType<Map<String, dynamic>>()
+          .map((f) => ToggleFilter.fromJson(f))
+          .toList();
+    }
+
     final idRaw = json['id'];
     final id = idRaw?.toString();
     if (id == null || id.isEmpty) {
@@ -174,6 +190,7 @@ sealed class Model with _$Model {
       },
       metadata: mergedMetadata,
       toolIds: toolIds,
+      filters: filters,
     );
   }
 
@@ -190,6 +207,7 @@ sealed class Model with _$Model {
       'metadata': metadata,
       'architecture': capabilities?['architecture'],
       'toolIds': toolIds,
+      'filters': filters?.map((f) => f.toJson()).toList(),
     };
     data.removeWhere((_, value) => value == null);
     return data;

lib/core/models/toggle_filter.dart

@@ -0,0 +1,48 @@
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'toggle_filter.freezed.dart';
+
+/// Represents a toggleable filter that can be enabled/disabled per chat.
+///
+/// These filters are created by OpenWebUI when a filter function has
+/// `toggle = True` set in its module. They appear as buttons next to
+/// web search, image generation, and code interpreter buttons.
+@freezed
+sealed class ToggleFilter with _$ToggleFilter {
+  const ToggleFilter._();
+
+  const factory ToggleFilter({
+    /// Unique identifier for the filter function.
+    required String id,
+
+    /// Display name for the filter.
+    required String name,
+
+    /// Optional description of what the filter does.
+    String? description,
+
+    /// Optional icon URL for the filter.
+    String? icon,
+
+    /// Whether this filter has user-configurable valves.
+    @Default(false) bool hasUserValves,
+  }) = _ToggleFilter;
+
+  factory ToggleFilter.fromJson(Map<String, dynamic> json) {
+    return ToggleFilter(
+      id: json['id'] as String,
+      name: json['name'] as String,
+      description: json['description'] as String?,
+      icon: json['icon'] as String?,
+      hasUserValves: json['has_user_valves'] as bool? ?? false,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+    'id': id,
+    'name': name,
+    if (description != null) 'description': description,
+    if (icon != null) 'icon': icon,
+    'has_user_valves': hasUserValves,
+  };
+}

lib/core/providers/app_providers.dart

@@ -750,6 +750,34 @@ class Models extends _$Models {
     final result = await AsyncValue.guard(() => _load(api));
     if (!ref.mounted) return;
     state = result;
+
+    // Update selected model with fresh data (e.g., filters) if it exists
+    // in the new models list
+    if (result.hasValue) {
+      final freshModels = result.value!;
+      final currentSelected = ref.read(selectedModelProvider);
+      if (currentSelected != null) {
+        try {
+          final freshModel = freshModels.firstWhere(
+            (m) => m.id == currentSelected.id,
+          );
+          // Update selected model with fresh data (filters, etc.)
+          if (freshModel != currentSelected) {
+            ref.read(selectedModelProvider.notifier).set(freshModel);
+            DebugLogger.log(
+              'selected-model-refreshed',
+              scope: 'models',
+              data: {
+                'id': freshModel.id,
+                'filters': freshModel.filters?.length ?? 0,
+              },
+            );
+          }
+        } catch (_) {
+          // Model no longer available - keep current selection
+        }
+      }
+    }
   }
 
   Future<List<Model>> _load(ApiService api) async {
@@ -939,14 +967,58 @@ final modelToolsAutoSelectionProvider = Provider<void>((ref) {
   });
 });
 
+// Auto-clear invalid filter selections when model changes
+// Filters are model-specific, so we need to validate selections against new model
+final modelFiltersAutoSelectionProvider = Provider<void>((ref) {
+  // Prevent disposal so listeners remain active throughout app lifecycle
+  ref.keepAlive();
+
+  void validateFilters(Model? model) {
+    final currentFilterIds = ref.read(selectedFilterIdsProvider);
+    if (currentFilterIds.isEmpty) return;
+
+    // Get available filters from the model
+    final availableFilters = model?.filters ?? const [];
+    final validFilterIds = availableFilters.map((f) => f.id).toSet();
+
+    // Filter out any selected IDs that aren't valid for this model
+    final validSelection = currentFilterIds
+        .where((id) => validFilterIds.contains(id))
+        .toList();
+
+    // Only update if something changed
+    if (validSelection.length != currentFilterIds.length) {
+      ref.read(selectedFilterIdsProvider.notifier).set(validSelection);
+      DebugLogger.log(
+        'filter-selection-validated',
+        scope: 'models/filters',
+        data: {
+          'modelId': model?.id,
+          'previousCount': currentFilterIds.length,
+          'validCount': validSelection.length,
+        },
+      );
+    }
+  }
+
+  // Validate on model change
+  ref.listen<Model?>(selectedModelProvider, (previous, next) {
+    if (previous?.id == next?.id && previous != null) {
+      return;
+    }
+    Future.microtask(() => validateFilters(next));
+  });
+});
+
 // Auto-apply default model from settings when it changes (and not manually overridden)
 // keepAlive to maintain listener throughout app lifecycle
 final defaultModelAutoSelectionProvider = Provider<void>((ref) {
   // Prevent disposal so listeners remain active throughout app lifecycle
   ref.keepAlive();
 
-  // Initialize the model tools auto-selection
+  // Initialize the model tools and filters auto-selection
   ref.watch(modelToolsAutoSelectionProvider);
+  ref.watch(modelFiltersAutoSelectionProvider);
 
   ref.listen<AppSettings>(appSettingsProvider, (previous, next) {
     // Only react when default model value changes

lib/core/services/api_service.dart

@@ -2687,6 +2687,7 @@ class ApiService {
     required String model,
     String? conversationId,
     List<String>? toolIds,
+    List<String>? filterIds,
     bool enableWebSearch = false,
     bool enableImageGeneration = false,
     Map<String, dynamic>? modelItem,
@@ -2797,6 +2798,12 @@ class ApiService {
 
     // No default reasoning parameters included; providers handle thinking UIs natively.
 
+    // Add filter_ids if provided (Open-WebUI toggle filters)
+    if (filterIds != null && filterIds.isNotEmpty) {
+      data['filter_ids'] = filterIds;
+      _traceApi('Including filter_ids in streaming request: $filterIds');
+    }
+
     // Add tool_ids if provided (Open-WebUI expects tool_ids as array of strings)
     if (toolIds != null && toolIds.isNotEmpty) {
       data['tool_ids'] = toolIds;

lib/features/chat/providers/chat_providers.dart

@@ -1335,6 +1335,8 @@ Future<void> regenerateMessage(
 
     // Include selected tool ids so provider-native tool calling is triggered
     final selectedToolIds = ref.read(selectedToolIdsProvider);
+    // Include selected filter ids (toggle filters enabled by user)
+    final selectedFilterIds = ref.read(selectedFilterIdsProvider);
     // Get conversation history for context (excluding the removed assistant message)
     final List<ChatMessage> messages = ref.read(chatMessagesProvider);
     final List<Map<String, dynamic>> conversationMessages =
@@ -1609,6 +1611,7 @@ Future<void> regenerateMessage(
       model: selectedModel.id,
       conversationId: activeConversation.id,
       toolIds: selectedToolIds.isNotEmpty ? selectedToolIds : null,
+      filterIds: selectedFilterIds.isNotEmpty ? selectedFilterIds : null,
       enableWebSearch: webSearchEnabled,
       enableImageGeneration: imageGenerationEnabled,
       modelItem: modelItem,
@@ -2011,6 +2014,11 @@ Future<void> _sendMessageInternal(
       ? toolIds
       : null;
 
+  // Get selected toggle filter IDs
+  final selectedFilterIds = ref.read(selectedFilterIdsProvider);
+  final List<String>? filterIdsForApi =
+      selectedFilterIds.isNotEmpty ? selectedFilterIds : null;
+
   try {
     // Pre-seed assistant skeleton on server to ensure correct chain
     // Generate assistant message id now (must be consistent across client/server)
@@ -2234,6 +2242,7 @@ Future<void> _sendMessageInternal(
       model: selectedModel.id,
       conversationId: activeConversation?.id,
       toolIds: toolIdsForApi,
+      filterIds: filterIdsForApi,
       enableWebSearch: webSearchEnabled,
       // Enable image generation on the server when requested
       enableImageGeneration: imageGenerationEnabled,

lib/features/chat/widgets/modern_chat_input.dart

@@ -20,6 +20,7 @@ import '../../tools/providers/tools_providers.dart';
 import '../../prompts/providers/prompts_providers.dart';
 import '../../../core/models/tool.dart';
 import '../../../core/models/prompt.dart';
+import '../../../core/models/toggle_filter.dart';
 import '../../../core/providers/app_providers.dart';
 import '../../../core/services/settings_service.dart';
 import '../../chat/services/voice_input_service.dart';
@@ -901,6 +902,11 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
       orElse: () => false,
     );
     final selectedToolIds = ref.watch(selectedToolIdsProvider);
+    final selectedFilterIds = ref.watch(selectedFilterIdsProvider);
+
+    // Get filters from the selected model for quick pills
+    final selectedModel = ref.watch(selectedModelProvider);
+    final availableFilters = selectedModel?.filters ?? const [];
 
     final focusTick = ref.watch(inputFocusTriggerProvider);
     final autofocusEnabled = ref.watch(composerAutofocusEnabledProvider);
@@ -974,7 +980,39 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
             onTap: widget.enabled && !_isRecording ? handleTap : null,
           ),
         );
+      } else if (id.startsWith('filter:')) {
+        // Handle filter quick pills
+        final filterId = id.substring(7); // Remove 'filter:' prefix
+        ToggleFilter? filter;
+        for (final f in availableFilters) {
+          if (f.id == filterId) {
+            filter = f;
+            break;
+          }
+        }
+        if (filter != null) {
+          final bool isSelected = selectedFilterIds.contains(filterId);
+          final String label = filter.name;
+          final IconData icon = Platform.isIOS
+              ? CupertinoIcons.sparkles
+              : Icons.auto_awesome;
+
+          void handleTap() {
+            ref.read(selectedFilterIdsProvider.notifier).toggle(filterId);
+          }
+
+          quickPills.add(
+            _buildPillButton(
+              icon: icon,
+              label: label,
+              isActive: isSelected,
+              onTap: widget.enabled && !_isRecording ? handleTap : null,
+              iconUrl: filter.icon,
+            ),
+          );
+        }
       } else {
+        // Handle tool quick pills
         Tool? tool;
         for (final t in availableTools) {
           if (t.id == id) {
@@ -1064,6 +1102,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
                 webSearchActive: webSearchEnabled,
                 imageGenerationActive: imageGenEnabled,
                 toolsActive: selectedToolIds.isNotEmpty,
+                filtersActive: selectedFilterIds.isNotEmpty,
               ),
               const SizedBox(width: Spacing.sm),
               Expanded(
@@ -1176,6 +1215,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
                 webSearchActive: webSearchEnabled,
                 imageGenerationActive: imageGenEnabled,
                 toolsActive: selectedToolIds.isNotEmpty,
+                filtersActive: selectedFilterIds.isNotEmpty,
               ),
               const SizedBox(width: Spacing.xs),
               Expanded(
@@ -1459,6 +1499,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     required bool webSearchActive,
     required bool imageGenerationActive,
     required bool toolsActive,
+    required bool filtersActive,
   }) {
     final bool enabled = widget.enabled && !_isRecording;
 
@@ -1473,6 +1514,9 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     } else if (toolsActive) {
       icon = Platform.isIOS ? CupertinoIcons.wrench : Icons.build;
       activeColor = context.conduitTheme.buttonPrimary;
+    } else if (filtersActive) {
+      icon = Platform.isIOS ? CupertinoIcons.sparkles : Icons.auto_awesome;
+      activeColor = context.conduitTheme.buttonPrimary;
     } else {
       icon = Platform.isIOS ? CupertinoIcons.add : Icons.add;
       activeColor = null;
@@ -1826,6 +1870,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     required String label,
     required bool isActive,
     VoidCallback? onTap,
+    String? iconUrl,
   }) {
     final bool enabled = onTap != null;
     final Brightness brightness = Theme.of(context).brightness;
@@ -1910,7 +1955,24 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
                 AnimatedContainer(
                   duration: const Duration(milliseconds: 200),
                   curve: Curves.easeOutCubic,
-                  child: Icon(icon, size: IconSize.small + 1, color: iconColor),
+                  child: iconUrl != null && iconUrl.isNotEmpty
+                      ? SizedBox(
+                          width: IconSize.small + 1,
+                          height: IconSize.small + 1,
+                          child: Image.network(
+                            iconUrl,
+                            width: IconSize.small + 1,
+                            height: IconSize.small + 1,
+                            color: iconUrl.endsWith('.svg') ? iconColor : null,
+                            colorBlendMode: BlendMode.srcIn,
+                            errorBuilder: (_, __, ___) => Icon(
+                              icon,
+                              size: IconSize.small + 1,
+                              color: iconColor,
+                            ),
+                          ),
+                        )
+                      : Icon(icon, size: IconSize.small + 1, color: iconColor),
                 ),
                 const SizedBox(width: Spacing.xs + 1),
                 AnimatedDefaultTextStyle(
@@ -2106,6 +2168,38 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
             ..add(_buildSectionLabel(l10n.tools))
             ..add(toolsSection);
 
+          // Add filters section (like tools section)
+          final modalSelectedModel = modalRef.watch(selectedModelProvider);
+          final modalToggleFilters =
+              modalSelectedModel?.filters ?? const <ToggleFilter>[];
+
+          if (modalToggleFilters.isNotEmpty) {
+            final modalSelectedFilterIds = modalRef.watch(
+              selectedFilterIdsProvider,
+            );
+            final filterTiles = modalToggleFilters.map((filter) {
+              final isSelected = modalSelectedFilterIds.contains(filter.id);
+              return _buildFilterTile(
+                filter: filter,
+                selected: isSelected,
+                onToggle: () {
+                  modalRef
+                      .read(selectedFilterIdsProvider.notifier)
+                      .toggle(filter.id);
+                },
+              );
+            }).toList();
+
+            bodyChildren
+              ..add(const SizedBox(height: Spacing.sm))
+              ..add(_buildSectionLabel(l10n.filters))
+              ..add(
+                Column(
+                  children: _withVerticalSpacing(filterTiles, Spacing.xxs),
+                ),
+              );
+          }
+
           // Measure content height and cap the sheet's max size to avoid extra blank space
           final GlobalKey sheetContentKey = GlobalKey();
           double? measuredContentHeight;
@@ -2244,6 +2338,7 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     String? subtitle,
     required bool value,
     required ValueChanged<bool> onChanged,
+    String? iconUrl,
   }) {
     final theme = context.conduitTheme;
     final brightness = Theme.of(context).brightness;
@@ -2287,7 +2382,17 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
             child: Row(
               crossAxisAlignment: CrossAxisAlignment.center,
               children: [
-                _buildToolGlyph(icon: icon, selected: value, theme: theme),
+                iconUrl != null && iconUrl.isNotEmpty
+                    ? _buildFilterGlyph(
+                        iconUrl: iconUrl,
+                        selected: value,
+                        theme: theme,
+                      )
+                    : _buildToolGlyph(
+                        icon: icon,
+                        selected: value,
+                        theme: theme,
+                      ),
                 const SizedBox(width: Spacing.xs),
                 Expanded(
                   child: Column(
@@ -2421,6 +2526,99 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     );
   }
 
+  Widget _buildFilterTile({
+    required ToggleFilter filter,
+    required bool selected,
+    required VoidCallback onToggle,
+  }) {
+    final theme = context.conduitTheme;
+    final brightness = Theme.of(context).brightness;
+    final description = filter.description ?? '';
+    final Color background = selected
+        ? theme.buttonPrimary.withValues(
+            alpha: brightness == Brightness.dark ? 0.28 : 0.16,
+          )
+        : theme.surfaceContainer.withValues(
+            alpha: brightness == Brightness.dark ? 0.32 : 0.12,
+          );
+    final Color borderColor = selected
+        ? theme.buttonPrimary.withValues(alpha: 0.7)
+        : theme.cardBorder.withValues(alpha: 0.55);
+
+    return Semantics(
+      button: true,
+      toggled: selected,
+      label: filter.name,
+      hint: description.isEmpty ? null : description,
+      child: Material(
+        color: Colors.transparent,
+        child: InkWell(
+          borderRadius: BorderRadius.circular(AppBorderRadius.input),
+          onTap: () {
+            HapticFeedback.selectionClick();
+            onToggle();
+          },
+          child: AnimatedContainer(
+            duration: const Duration(milliseconds: 180),
+            curve: Curves.easeOutCubic,
+            margin: const EdgeInsets.symmetric(vertical: Spacing.xxs),
+            padding: const EdgeInsets.all(Spacing.sm),
+            decoration: BoxDecoration(
+              color: background,
+              borderRadius: BorderRadius.circular(AppBorderRadius.input),
+              border: Border.all(color: borderColor, width: BorderWidth.thin),
+              boxShadow: selected ? ConduitShadows.low(context) : const [],
+            ),
+            child: Row(
+              crossAxisAlignment: CrossAxisAlignment.center,
+              children: [
+                _buildFilterGlyph(
+                  iconUrl: filter.icon,
+                  selected: selected,
+                  theme: theme,
+                ),
+                const SizedBox(width: Spacing.xs),
+                Expanded(
+                  child: Column(
+                    crossAxisAlignment: CrossAxisAlignment.start,
+                    children: [
+                      Text(
+                        filter.name,
+                        style: AppTypography.bodySmallStyle.copyWith(
+                          color: theme.textPrimary,
+                          fontWeight: selected
+                              ? FontWeight.w600
+                              : FontWeight.w500,
+                        ),
+                        maxLines: 1,
+                        overflow: TextOverflow.ellipsis,
+                      ),
+                      if (description.isNotEmpty) ...[
+                        const SizedBox(height: Spacing.xs),
+                        Text(
+                          description,
+                          maxLines: 2,
+                          overflow: TextOverflow.ellipsis,
+                          style: AppTypography.captionStyle.copyWith(
+                            color: theme.textSecondary.withValues(
+                              alpha: Alpha.strong,
+                            ),
+                          ),
+                        ),
+                      ],
+                    ],
+                  ),
+                ),
+                const SizedBox(width: Spacing.xs),
+                _buildTogglePill(isOn: selected, theme: theme),
+              ],
+            ),
+          ),
+        ),
+      ),
+    );
+  }
+
   Widget _buildToolGlyph({
     required IconData icon,
     required bool selected,
@@ -2498,6 +2696,57 @@ class _ModernChatInputState extends ConsumerState<ModernChatInput>
     return null;
   }
 
+  /// Builds the circular glyph/avatar for a filter tile.
+  Widget _buildFilterGlyph({
+    String? iconUrl,
+    required bool selected,
+    required ConduitThemeExtension theme,
+  }) {
+    final Color accentStart = theme.buttonPrimary.withValues(
+      alpha: selected ? Alpha.active : Alpha.hover,
+    );
+    final Color accentEnd = theme.buttonPrimary.withValues(
+      alpha: selected ? Alpha.highlight : Alpha.focus,
+    );
+    final Color iconColor = selected
+        ? theme.buttonPrimaryText
+        : theme.iconPrimary.withValues(alpha: Alpha.strong);
+
+    return Container(
+      width: 36,
+      height: 36,
+      decoration: BoxDecoration(
+        shape: BoxShape.circle,
+        gradient: LinearGradient(
+          begin: Alignment.topLeft,
+          end: Alignment.bottomRight,
+          colors: [accentStart, accentEnd],
+        ),
+      ),
+      child: iconUrl != null && iconUrl.isNotEmpty
+          ? ClipOval(
+              child: Image.network(
+                iconUrl,
+                width: 36,
+                height: 36,
+                fit: BoxFit.cover,
+                color: iconUrl.endsWith('.svg') ? iconColor : null,
+                colorBlendMode: BlendMode.srcIn,
+                errorBuilder: (_, __, ___) => Icon(
+                  Platform.isIOS ? CupertinoIcons.sparkles : Icons.auto_awesome,
+                  color: iconColor,
+                  size: IconSize.modal,
+                ),
+              ),
+            )
+          : Icon(
+              Platform.isIOS ? CupertinoIcons.sparkles : Icons.auto_awesome,
+              color: iconColor,
+              size: IconSize.modal,
+            ),
+    );
+  }
+
   Widget _buildTogglePill({
     required bool isOn,
     required ConduitThemeExtension theme,

lib/features/profile/views/app_customization_page.dart

@@ -306,7 +306,18 @@ class AppCustomizationPage extends ConsumerWidget {
       data: (value) => value,
       orElse: () => const <Tool>[],
     );
-    final allowed = <String>{'web', 'image', ...tools.map((t) => t.id)};
+
+    // Get filters from the selected model
+    final selectedModel = ref.watch(selectedModelProvider);
+    final filters = selectedModel?.filters ?? const [];
+
+    // Include filter IDs in allowed set (prefixed with 'filter:' to avoid collisions)
+    final allowed = <String>{
+      'web',
+      'image',
+      ...tools.map((t) => t.id),
+      ...filters.map((f) => 'filter:${f.id}'),
+    };
 
     final selected = selectedRaw
         .where((id) => allowed.contains(id))
@@ -344,6 +355,20 @@ class AppCustomizationPage extends ConsumerWidget {
       }).toList();
     }
 
+    List<Widget> buildFilterChips() {
+      return filters.map((filter) {
+        final filterId = 'filter:${filter.id}';
+        final isSelected = selected.contains(filterId);
+        final canSelect = selectedCount < maxPills || isSelected;
+        return ConduitChip(
+          label: filter.name,
+          icon: Platform.isIOS ? CupertinoIcons.sparkles : Icons.auto_awesome,
+          isSelected: isSelected,
+          onTap: canSelect ? () => toggle(filterId) : null,
+        );
+      }).toList();
+    }
+
     final l10n = AppLocalizations.of(context)!;
     final selectedCountText = l10n.quickActionsSelectedCount(selectedCount);
 
@@ -378,6 +403,7 @@ class AppCustomizationPage extends ConsumerWidget {
                     : null,
               ),
               ...buildToolChips(),
+              ...buildFilterChips(),
               if (selected.isNotEmpty)
                 ConduitChip(
                   label: l10n.clear,

lib/features/tools/providers/tools_providers.dart

@@ -63,3 +63,26 @@ class SelectedToolIds extends _$SelectedToolIds {
 
   void set(List<String> ids) => state = List<String>.from(ids);
 }
+
+/// Provider for selected filter IDs (toggle filters enabled by user).
+///
+/// These filters are dynamically created by OpenWebUI filters with
+/// `toggle = True` set in their module. They appear as toggleable
+/// buttons in the chat input UI.
+@Riverpod(keepAlive: true)
+class SelectedFilterIds extends _$SelectedFilterIds {
+  @override
+  List<String> build() => [];
+
+  void set(List<String> ids) => state = List<String>.from(ids);
+
+  void toggle(String id) {
+    if (state.contains(id)) {
+      state = state.where((i) => i != id).toList();
+    } else {
+      state = [...state, id];
+    }
+  }
+
+  void clear() => state = [];
+}

lib/l10n/app_de.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Neuer Chat starten oder Modelle oben verwalten",
   "attachmentLabel": "Anhang",
   "tools": "Werkzeuge",
+  "filters": "Filter",
   "voiceInput": "Spracheingabe",
   "voice": "Sprache",
   "voiceStatusListening": "Hört zu…",

lib/l10n/app_en.arb

@@ -462,6 +462,10 @@
   "@tools": {
     "description": "Header for a tools/actions section."
   },
+  "filters": "Filters",
+  "@filters": {
+    "description": "Header for toggle filters section."
+  },
   "voiceInput": "Voice input",
   "@voiceInput": {
     "description": "Label for voice input feature."

lib/l10n/app_es.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Inicia Nueva conversación o gestiona modelos desde la barra superior",
   "attachmentLabel": "Adjunto",
   "tools": "Herramientas",
+  "filters": "Filtros",
   "voiceInput": "Entrada de voz",
   "voice": "Voz",
   "voiceStatusListening": "Escuchando...",

lib/l10n/app_fr.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Lancez Nouveau chat ou gérez les modèles depuis la barre",
   "attachmentLabel": "Pièce jointe",
   "tools": "Outils",
+  "filters": "Filtres",
   "voiceInput": "Entrée vocale",
   "voice": "Voix",
   "voiceStatusListening": "Écoute…",

lib/l10n/app_it.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Avvia Nuova chat o gestisci i modelli dalla barra",
   "attachmentLabel": "Allegato",
   "tools": "Strumenti",
+  "filters": "Filtri",
   "voiceInput": "Input vocale",
   "voice": "Voce",
   "voiceStatusListening": "In ascolto…",

lib/l10n/app_ko.arb

@@ -156,6 +156,7 @@
   "onboardQuickBullet2": "상단 바에서 새 채팅 시작 또는 모델 관리",
   "attachmentLabel": "첨부",
   "tools": "도구",
+  "filters": "필터",
   "voiceInput": "음성 입력",
   "voice": "음성",
   "voiceStatusListening": "듣는 중…",

lib/l10n/app_nl.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Start Nieuwe chat of beheer modellen vanuit de bovenbalk",
   "attachmentLabel": "Bijlage",
   "tools": "Hulpmiddelen",
+  "filters": "Filters",
   "voiceInput": "Spraakinvoer",
   "voice": "Stem",
   "voiceStatusListening": "Luisteren...",

lib/l10n/app_ru.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "Начните новый чат или управляйте моделями из верхней панели",
   "attachmentLabel": "Вложение",
   "tools": "Инструменты",
+  "filters": "Фильтры",
   "voiceInput": "Голосовой ввод",
   "voice": "Голос",
   "voiceStatusListening": "Слушаю...",

lib/l10n/app_zh.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "从顶部栏开始新对话或管理模型",
   "attachmentLabel": "附件",
   "tools": "工具",
+  "filters": "过滤器",
   "voiceInput": "语音输入",
   "voice": "语音",
   "voiceStatusListening": "正在听...",

lib/l10n/app_zh_Hant.arb

@@ -106,6 +106,7 @@
   "onboardQuickBullet2": "從頂部欄開始新對話或管理模型",
   "attachmentLabel": "附件",
   "tools": "工具",
+  "filters": "過濾器",
   "voiceInput": "語音輸入",
   "voice": "語音",
   "voiceStatusListening": "正在聽...",