Port Lite chart/tab polish to Dashboard + LSP diagnostics cleanup

Dashboard/Analysis/SqlServerBaselineProvider.cs

@@ -463,7 +463,7 @@ private static double PoolVariance(List<BaselineBucket> buckets, double grandMea
         return totalSumSq / (totalSamples - 1);
     }
 
-    private class CachedBaseline
+    private sealed class CachedBaseline
     {
         public DateTime ComputedAt { get; init; }
         public DateTime RealTime { get; init; }

Dashboard/Controls/ConfigChangesContent.xaml

@@ -15,7 +15,7 @@
             <MenuItem Header="Export to CSV..." Click="ExportToCsv_Click"/>
         </ContextMenu>
     </UserControl.Resources>
-    <TabControl>
+    <TabControl ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Server Configuration Changes Sub-Tab -->
         <TabItem Header="Server Config Changes">
             <Grid>

Dashboard/Controls/CorrelatedTimelineLanesControl.xaml.cs

@@ -320,7 +320,7 @@ private void UpdateBlockingLane(List<(double Time, double Value)> blockingData,
             }
         }
 
-        BlockingChart.Plot.Axes.DateTimeTicksBottom();
+        BlockingChart.Plot.Axes.DateTimeTicksBottomDateChange();
         BlockingChart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
         TabHelpers.ReapplyAxisColors(BlockingChart);
 
@@ -394,7 +394,7 @@ private void UpdateLane(ScottPlot.WPF.WpfPlot chart, string title,
 
         _crosshairManager?.SetLaneData(chart, times, values);
 
-        chart.Plot.Axes.DateTimeTicksBottom();
+        chart.Plot.Axes.DateTimeTicksBottomDateChange();
         if (chart != FileIoChart)
             chart.Plot.Axes.Bottom.TickLabelStyle.IsVisible = false;
 

Dashboard/Controls/CurrentConfigContent.xaml

@@ -15,7 +15,7 @@
             <MenuItem Header="Export to CSV..." Click="ExportToCsv_Click"/>
         </ContextMenu>
     </UserControl.Resources>
-    <TabControl>
+    <TabControl ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Current Server Configuration Sub-Tab -->
         <TabItem Header="Server Configuration">
             <Grid>

Dashboard/Controls/FinOpsContent.xaml

@@ -44,7 +44,7 @@
                       SelectionChanged="ServerSelector_SelectionChanged"/>
         </StackPanel>
 
-        <TabControl Grid.Row="1" Background="Transparent" BorderThickness="0">
+        <TabControl Grid.Row="1" Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
 
         <!-- Recommendations Sub-Tab -->
         <TabItem Header="Recommendations">

Dashboard/Controls/MemoryContent.xaml

@@ -32,7 +32,7 @@
         </ResourceDictionary>
     </UserControl.Resources>
 
-    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0">
+    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Memory Overview Sub-Tab -->
         <TabItem Header="Memory Overview">
             <!-- Chart + Summary Panel (grid removed) -->

Dashboard/Controls/MemoryContent.xaml.cs

@@ -353,7 +353,7 @@ private void LoadMemoryStatsOverviewChart(List<MemoryStatsItem> memoryData, int
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            MemoryStatsOverviewChart.Plot.Axes.DateTimeTicksBottom();
+            MemoryStatsOverviewChart.Plot.Axes.DateTimeTicksBottomDateChange();
             MemoryStatsOverviewChart.Plot.Axes.SetLimitsX(xMin, xMax);
             MemoryStatsOverviewChart.Plot.YLabel("MB");
             // Fixed negative space for legend
@@ -605,7 +605,7 @@ private void LoadMemoryGrantSizingChart(List<PoolGrantPoint> aggregated, int hou
                 MemoryGrantSizingChart.Plot.Legend.FontSize = 12;
             }
 
-            MemoryGrantSizingChart.Plot.Axes.DateTimeTicksBottom();
+            MemoryGrantSizingChart.Plot.Axes.DateTimeTicksBottomDateChange();
             MemoryGrantSizingChart.Plot.Axes.SetLimitsX(xMin, xMax);
             MemoryGrantSizingChart.Plot.YLabel("MB");
             MemoryGrantSizingChart.Plot.Axes.AutoScaleY();
@@ -675,7 +675,7 @@ private void LoadMemoryGrantActivityChart(List<PoolGrantPoint> aggregated, int h
                 MemoryGrantActivityChart.Plot.Legend.FontSize = 12;
             }
 
-            MemoryGrantActivityChart.Plot.Axes.DateTimeTicksBottom();
+            MemoryGrantActivityChart.Plot.Axes.DateTimeTicksBottomDateChange();
             MemoryGrantActivityChart.Plot.Axes.SetLimitsX(xMin, xMax);
             MemoryGrantActivityChart.Plot.YLabel("Count");
             MemoryGrantActivityChart.Plot.Axes.AutoScaleY();
@@ -856,7 +856,7 @@ private async System.Threading.Tasks.Task UpdateMemoryClerksChartFromPickerAsync
                     MemoryClerksTopText.Text = "N/A";
                 }
 
-                MemoryClerksChart.Plot.Axes.DateTimeTicksBottom();
+                MemoryClerksChart.Plot.Axes.DateTimeTicksBottomDateChange();
                 MemoryClerksChart.Plot.Axes.SetLimitsX(xMin, xMax);
                 MemoryClerksChart.Plot.YLabel("MB");
                 MemoryClerksChart.Plot.Axes.AutoScaleY();
@@ -1001,7 +1001,7 @@ private void LoadPlanCacheChart(IEnumerable<PlanCacheStatsItem> data, int hoursB
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            PlanCacheChart.Plot.Axes.DateTimeTicksBottom();
+            PlanCacheChart.Plot.Axes.DateTimeTicksBottomDateChange();
             PlanCacheChart.Plot.Axes.SetLimitsX(xMin, xMax);
             PlanCacheChart.Plot.YLabel("MB");
             // Fixed negative space for legend
@@ -1120,7 +1120,7 @@ private void LoadMemoryPressureEventsChart(IEnumerable<MemoryPressureEventItem>
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            MemoryPressureEventsChart.Plot.Axes.DateTimeTicksBottom();
+            MemoryPressureEventsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             MemoryPressureEventsChart.Plot.Axes.SetLimitsX(xMin, xMax);
             MemoryPressureEventsChart.Plot.YLabel("Event Count");
             // Fixed negative space for legend

Dashboard/Controls/QueryPerformanceContent.xaml

@@ -46,7 +46,7 @@
         </ResourceDictionary>
     </UserControl.Resources>
 
-    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0">
+    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Performance Trends Sub-Tab -->
         <TabItem Header="Performance Trends">
             <Grid>

Dashboard/Controls/QueryPerformanceContent.xaml.cs

@@ -2437,7 +2437,7 @@ private void LoadDurationChart(WpfPlot chart, IEnumerable<DurationTrendItem> tre
                 _legendPanels[chart] = chart.Plot.ShowLegend(ScottPlot.Edge.Bottom);
                 chart.Plot.Legend.FontSize = 12;
 
-                chart.Plot.Axes.DateTimeTicksBottom();
+                chart.Plot.Axes.DateTimeTicksBottomDateChange();
                 chart.Plot.Axes.SetLimitsX(xMin, xMax);
                 chart.Plot.YLabel("Duration (ms/sec)");
                 TabHelpers.LockChartVerticalAxis(chart);
@@ -2492,7 +2492,7 @@ private void LoadExecChart(IEnumerable<ExecutionTrendItem> execTrends, int hours
             _legendPanels[QueryPerfTrendsExecChart] = QueryPerfTrendsExecChart.Plot.ShowLegend(ScottPlot.Edge.Bottom);
             QueryPerfTrendsExecChart.Plot.Legend.FontSize = 12;
 
-            QueryPerfTrendsExecChart.Plot.Axes.DateTimeTicksBottom();
+            QueryPerfTrendsExecChart.Plot.Axes.DateTimeTicksBottomDateChange();
             QueryPerfTrendsExecChart.Plot.Axes.SetLimitsX(xMin, xMax);
             QueryPerfTrendsExecChart.Plot.YLabel("Executions/sec");
             TabHelpers.LockChartVerticalAxis(QueryPerfTrendsExecChart);

Dashboard/Controls/ResourceMetricsContent.xaml

@@ -25,7 +25,7 @@
         </ContextMenu>
     </UserControl.Resources>
 
-    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0">
+    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Server Trends Sub-Tab — Correlated Timeline Lanes -->
         <TabItem Header="Server Trends">
             <DockPanel>
@@ -148,7 +148,7 @@
 
         <!-- File I/O Sub-Tab -->
         <TabItem Header="File I/O">
-            <TabControl Background="Transparent" BorderThickness="0">
+            <TabControl Background="Transparent" BorderThickness="0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
                 <!-- File I/O Latency sub-tab -->
                 <TabItem Header="File I/O Latency">
                     <Grid Margin="5">

Dashboard/Controls/ResourceMetricsContent.xaml.cs

@@ -404,7 +404,7 @@ private void LoadLatchStatsChart(IEnumerable<LatchStatsItem> data, int hoursBack
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            LatchStatsChart.Plot.Axes.DateTimeTicksBottom();
+            LatchStatsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             LatchStatsChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(LatchStatsChart);
             LatchStatsChart.Plot.YLabel("Wait Time (ms/sec)");
@@ -495,7 +495,7 @@ private void LoadSpinlockStatsChart(IEnumerable<SpinlockStatsItem> data, int hou
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            SpinlockStatsChart.Plot.Axes.DateTimeTicksBottom();
+            SpinlockStatsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             SpinlockStatsChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(SpinlockStatsChart);
             SpinlockStatsChart.Plot.YLabel("Collisions/sec");
@@ -603,7 +603,7 @@ private void LoadCombinedTempDbLatencyChart(List<FileIoLatencyTimeSeriesItem> da
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            TempDbLatencyChart.Plot.Axes.DateTimeTicksBottom();
+            TempDbLatencyChart.Plot.Axes.DateTimeTicksBottomDateChange();
             TempDbLatencyChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(TempDbLatencyChart);
             TempDbLatencyChart.Plot.YLabel("Latency (ms)");
@@ -708,7 +708,7 @@ private void LoadTempdbStatsChart(IEnumerable<TempdbStatsItem> data, int hoursBa
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            TempdbStatsChart.Plot.Axes.DateTimeTicksBottom();
+            TempdbStatsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             TempdbStatsChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TempdbStatsChart.Plot.Axes.AutoScaleY();
             TempdbStatsChart.Plot.YLabel("MB");
@@ -879,7 +879,7 @@ private void LoadSessionStatsChart(IEnumerable<SessionStatsItem> data, int hours
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            SessionStatsChart.Plot.Axes.DateTimeTicksBottom();
+            SessionStatsChart.Plot.Axes.DateTimeTicksBottomDateChange();
             SessionStatsChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(SessionStatsChart);
             SessionStatsChart.Plot.YLabel("Session Count");
@@ -1014,7 +1014,7 @@ private void LoadFileIoChart(ScottPlot.WPF.WpfPlot chart, List<FileIoLatencyTime
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            chart.Plot.Axes.DateTimeTicksBottom();
+            chart.Plot.Axes.DateTimeTicksBottomDateChange();
             chart.Plot.Axes.SetLimitsX(xMin, xMax);
             chart.Plot.YLabel(yLabel);
             TabHelpers.LockChartVerticalAxis(chart);
@@ -1485,7 +1485,7 @@ private void LoadPerfmonCountersChart(List<PerfmonStatsItem>? data, int hoursBac
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            PerfmonCountersChart.Plot.Axes.DateTimeTicksBottom();
+            PerfmonCountersChart.Plot.Axes.DateTimeTicksBottomDateChange();
             PerfmonCountersChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(PerfmonCountersChart);
             PerfmonCountersChart.Plot.YLabel("Value/sec");
@@ -1816,7 +1816,7 @@ private void LoadWaitStatsDetailChart(List<WaitStatsDataPoint>? data, int hoursB
                 noDataText.LabelAlignment = ScottPlot.Alignment.MiddleCenter;
             }
 
-            WaitStatsDetailChart.Plot.Axes.DateTimeTicksBottom();
+            WaitStatsDetailChart.Plot.Axes.DateTimeTicksBottomDateChange();
             WaitStatsDetailChart.Plot.Axes.SetLimitsX(xMin, xMax);
             TabHelpers.SetChartYLimitsWithLegendPadding(WaitStatsDetailChart);
             WaitStatsDetailChart.Plot.YLabel(useAvgPerWait ? "Avg Wait Time (ms/wait)" : "Wait Time (ms/sec)");

Dashboard/Controls/SystemEventsContent.xaml

@@ -31,7 +31,7 @@
         </ResourceDictionary>
     </UserControl.Resources>
 
-    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0">
+    <TabControl x:Name="SubTabControl" TabStripPlacement="Top" Margin="0,5,0,0" ItemContainerStyle="{DynamicResource SubTabItemStyle}">
         <!-- Overview Tab -->
         <TabItem Header="Corruption Events">
             <Grid Margin="10,5,10,10">