some issues fixed

lib/screens/overview_screen.dart

@@ -474,7 +474,19 @@ class _OverviewScreenState extends State<OverviewScreen> {
           ),
         );
       },
-      onMonthTap: (month) => _openPeriod(context, month),
+      onMonthTap: (month, {labelId, flow}) => _openPeriod(
+        context,
+        month,
+        labelId: labelId,
+        labelIds: {
+          for (final id in favourite.labelIds) id,
+        },
+        flow: flow ??
+            (favourite.metric == OverviewMetricMode.labels
+                ? favourite.flow
+                : null),
+        periodMode: favourite.period,
+      ),
     );
   }
 
@@ -590,7 +602,13 @@ class _OverviewScreenState extends State<OverviewScreen> {
               ),
             );
           },
-          onMonthTap: (month) => _openPeriod(context, month),
+          onMonthTap: (month, {labelId, flow}) => _openPeriod(
+            context,
+            month,
+            labelId: labelId,
+            flow: flow ??
+                (_metric == OverviewMetricMode.labels ? _labelFlow : null),
+          ),
         ),
         const SizedBox(height: 14),
         if (_metric == OverviewMetricMode.flow) ...[
@@ -739,22 +757,28 @@ class _OverviewScreenState extends State<OverviewScreen> {
     BuildContext context,
     DateTime period, {
     String? labelId,
+    Set<String>? labelIds,
+    TxFlowFilter? flow,
+    OverviewPeriodMode? periodMode,
   }) {
-    final yearly = _period == OverviewPeriodMode.yearly;
+    final mode = periodMode ?? _period;
+    final yearly = mode == OverviewPeriodMode.yearly;
     final initial = yearly ? DateTime(period.year, 12) : period;
-    final labelIds = labelId != null
+    final resolvedLabelIds = labelId != null
         ? {labelId}
-        : {
-            // Open with the same labels currently shown on the chart.
-            for (final id in _includedLabelIds) id,
-          };
+        : (labelIds ??
+            {
+              // Open with the same labels currently shown on the chart.
+              for (final id in _includedLabelIds) id,
+            });
     Navigator.of(context).push(
       MaterialPageRoute<void>(
         builder: (_) => TransactionsScreen(
           initialMonth: initial,
-          initialLabelIds: labelIds,
+          initialLabelIds: resolvedLabelIds,
           initialLabelMatch: LabelMatchMode.or,
-          initialSearchInMonthOnly: !yearly && labelIds.isNotEmpty,
+          initialFlow: flow,
+          initialSearchInMonthOnly: !yearly && resolvedLabelIds.isNotEmpty,
           initialYear: yearly ? period.year : null,
         ),
       ),
@@ -1182,7 +1206,11 @@ class _ChartCard extends StatelessWidget {
   final int? includedLabelCount;
   final int availableLabelCount;
   final void Function(TxLabel label) onLabelTap;
-  final void Function(DateTime month) onMonthTap;
+  final void Function(
+    DateTime month, {
+    String? labelId,
+    TxFlowFilter? flow,
+  }) onMonthTap;
   final ValueChanged<OverviewPeriodMode>? onPeriodModeChanged;
   final VoidCallback? onEdit;
 
@@ -1277,7 +1305,7 @@ class _ChartCard extends StatelessWidget {
       runSpacing: 2,
       alignment: WrapAlignment.end,
       children: [
-        for (final row in labelSpend.take(compact ? 3 : 5))
+        for (final row in labelSpend.take(6))
           GestureDetector(
             onTap: () => onLabelTap(row.label),
             child: _LegendDot(
@@ -1286,7 +1314,7 @@ class _ChartCard extends StatelessWidget {
               compact: compact,
             ),
           ),
-        if (labelSpend.length > (compact ? 3 : 5))
+        if (labelSpend.length > 6)
           _LegendDot(
             color: colors.outline,
             label: 'Other',
@@ -1529,6 +1557,7 @@ class _ChartCard extends StatelessWidget {
                       monthly: monthly,
                       currency: currency,
                       period: period,
+                      onMonthTap: onMonthTap,
                     )
                   : _LabelMonthBars(
                       months: months,
@@ -1554,12 +1583,18 @@ class _FlowBars extends StatelessWidget {
     required this.monthly,
     required this.currency,
     required this.period,
+    required this.onMonthTap,
   });
 
   final List<DateTime> months;
   final Map<DateTime, _MonthBucket> monthly;
   final String currency;
   final OverviewPeriodMode period;
+  final void Function(
+    DateTime month, {
+    String? labelId,
+    TxFlowFilter? flow,
+  }) onMonthTap;
 
   @override
   Widget build(BuildContext context) {
@@ -1594,6 +1629,19 @@ class _FlowBars extends StatelessWidget {
         maxY: safeMax,
         groupsSpace: period == OverviewPeriodMode.yearly ? 16 : 10,
         barTouchData: BarTouchData(
+          touchCallback: (event, response) {
+            if (event is! FlTapUpEvent) return;
+            final spot = response?.spot;
+            if (spot == null) return;
+            final index = spot.touchedBarGroupIndex;
+            if (index < 0 || index >= months.length) return;
+            final rodIndex = spot.touchedRodDataIndex;
+            // Rods: 0 = expense, 1 = income.
+            final flow = rodIndex == 1
+                ? TxFlowFilter.income
+                : TxFlowFilter.expense;
+            onMonthTap(months[index], flow: flow);
+          },
           touchTooltipData: BarTouchTooltipData(
             getTooltipItem: (group, groupIndex, rod, rodIndex) {
               final month = months[group.x.toInt()];
@@ -1709,7 +1757,7 @@ class _LabelMonthBars extends StatelessWidget {
     required this.onMonthTap,
   });
 
-  static const _maxSeriesLabels = 5;
+  static const _maxSeriesLabels = 6;
 
   final List<DateTime> months;
   final List<_LabelSpend> labelSpend;
@@ -1718,7 +1766,11 @@ class _LabelMonthBars extends StatelessWidget {
   final OverviewPeriodMode period;
   final LabelChartBarStyle barStyle;
   final bool invertChart;
-  final void Function(DateTime month) onMonthTap;
+  final void Function(
+    DateTime month, {
+    String? labelId,
+    TxFlowFilter? flow,
+  }) onMonthTap;
 
   double _plot(double value) => invertChart ? -value : value;
 
@@ -1805,12 +1857,12 @@ class _LabelMonthBars extends StatelessWidget {
     final rodWidth = stacked
         ? (period == OverviewPeriodMode.yearly ? 18.0 : 14.0)
         : period == OverviewPeriodMode.yearly
-            ? (seriesCount <= 3 ? 12.0 : 8.0)
+            ? (seriesCount <= 3 ? 12.0 : seriesCount <= 6 ? 8.0 : 6.0)
             : (seriesCount <= 3
                 ? 7.0
-                : seriesCount <= 5
-                    ? 5.0
-                    : 4.0);
+                : seriesCount <= 6
+                    ? 4.5
+                    : 3.5);
 
     List<BarChartRodData> rodsFor(DateTime month) {
       final bucket =
@@ -1896,9 +1948,24 @@ class _LabelMonthBars extends StatelessWidget {
         barTouchData: BarTouchData(
           touchCallback: (event, response) {
             if (event is! FlTapUpEvent) return;
-            final index = response?.spot?.touchedBarGroupIndex;
-            if (index == null || index < 0 || index >= months.length) return;
-            onMonthTap(months[index]);
+            final spot = response?.spot;
+            if (spot == null) return;
+            final index = spot.touchedBarGroupIndex;
+            if (index < 0 || index >= months.length) return;
+            String? labelId;
+            if (stacked) {
+              final stackIdx = spot.touchedStackItemIndex;
+              if (stackIdx >= 0 && stackIdx < topLabels.length) {
+                labelId = topLabels[stackIdx].label.id;
+              }
+            } else {
+              final rodIdx = spot.touchedRodDataIndex;
+              if (rodIdx >= 0 && rodIdx < topLabels.length) {
+                labelId = topLabels[rodIdx].label.id;
+              }
+              // Last rod may be "Other" — open month with chart labels only.
+            }
+            onMonthTap(months[index], labelId: labelId);
           },
           touchTooltipData: BarTouchTooltipData(
             getTooltipItem: (group, groupIndex, rod, rodIndex) {