feat(chart): interactive zoom/pan controls, pattern overlays, predictions, individual pattern filtering and landscape fullscreen mode

FinlyticApp/lib/features/asset_detail/bloc/technical/asset_technical_bloc.dart

@@ -15,5 +15,32 @@ class AssetTechnicalBloc extends Bloc<AssetTechnicalEvent, AssetTechnicalState>
         emit(AssetTechnicalError(e.toString()));
       }
     });
+
+    on<TogglePatternFilter>((event, emit) {
+      if (state is AssetTechnicalLoaded) {
+        final current = state as AssetTechnicalLoaded;
+        final updated = Set<int>.from(current.disabledPatternIndices);
+        if (event.enabled) {
+          updated.remove(event.patternIndex);
+        } else {
+          updated.add(event.patternIndex);
+        }
+        emit(current.copyWith(disabledPatternIndices: updated));
+      }
+    });
+
+    on<ToggleIndicatorFilter>((event, emit) {
+      if (state is AssetTechnicalLoaded) {
+        final current = state as AssetTechnicalLoaded;
+        emit(current.copyWith(
+          showSma50: event.showSma50,
+          showSma200: event.showSma200,
+          showEma: event.showEma,
+          showSupertrend: event.showSupertrend,
+          showPatterns: event.showPatterns,
+          showSignals: event.showSignals,
+        ));
+      }
+    });
   }
 }

FinlyticApp/lib/features/asset_detail/bloc/technical/asset_technical_event.dart

@@ -1,7 +1,32 @@
 abstract class AssetTechnicalEvent {}
+
 class LoadAssetTechnical extends AssetTechnicalEvent {
   final String isin;
   final bool forceRefresh;
   final String? ticker;
   LoadAssetTechnical(this.isin, {this.forceRefresh = false, this.ticker});
 }
+
+class TogglePatternFilter extends AssetTechnicalEvent {
+  final int patternIndex;
+  final bool enabled;
+  TogglePatternFilter({required this.patternIndex, required this.enabled});
+}
+
+class ToggleIndicatorFilter extends AssetTechnicalEvent {
+  final bool? showSma50;
+  final bool? showSma200;
+  final bool? showEma;
+  final bool? showSupertrend;
+  final bool? showPatterns;
+  final bool? showSignals;
+
+  ToggleIndicatorFilter({
+    this.showSma50,
+    this.showSma200,
+    this.showEma,
+    this.showSupertrend,
+    this.showPatterns,
+    this.showSignals,
+  });
+}

FinlyticApp/lib/features/asset_detail/bloc/technical/asset_technical_state.dart

@@ -1,12 +1,55 @@
 import '../../models/technical_analysis_model.dart';
 
 abstract class AssetTechnicalState {}
+
 class AssetTechnicalInitial extends AssetTechnicalState {}
+
 class AssetTechnicalLoading extends AssetTechnicalState {}
+
 class AssetTechnicalLoaded extends AssetTechnicalState {
   final TechnicalAnalysisModel? data;
-  AssetTechnicalLoaded(this.data);
+  final Set<int> disabledPatternIndices;
+  final bool showSma50;
+  final bool showSma200;
+  final bool showEma;
+  final bool showSupertrend;
+  final bool showPatterns;
+  final bool showSignals;
+
+  AssetTechnicalLoaded(
+    this.data, {
+    this.disabledPatternIndices = const {},
+    this.showSma50 = true,
+    this.showSma200 = true,
+    this.showEma = true,
+    this.showSupertrend = true,
+    this.showPatterns = true,
+    this.showSignals = true,
+  });
+
+  AssetTechnicalLoaded copyWith({
+    TechnicalAnalysisModel? data,
+    Set<int>? disabledPatternIndices,
+    bool? showSma50,
+    bool? showSma200,
+    bool? showEma,
+    bool? showSupertrend,
+    bool? showPatterns,
+    bool? showSignals,
+  }) {
+    return AssetTechnicalLoaded(
+      data ?? this.data,
+      disabledPatternIndices: disabledPatternIndices ?? this.disabledPatternIndices,
+      showSma50: showSma50 ?? this.showSma50,
+      showSma200: showSma200 ?? this.showSma200,
+      showEma: showEma ?? this.showEma,
+      showSupertrend: showSupertrend ?? this.showSupertrend,
+      showPatterns: showPatterns ?? this.showPatterns,
+      showSignals: showSignals ?? this.showSignals,
+    );
+  }
 }
+
 class AssetTechnicalError extends AssetTechnicalState {
   final String message;
   AssetTechnicalError(this.message);