fix(ui): unfreeze the operation spinner and attribute rebind churn

Three causes behind the stuck indicator:
- OperationStatus.End did not retire the generation, so tick work posted
  while the dispatcher was blocked drained afterwards and set
  ShowIndicator back to true on a finished operation.
- The startup update check ran in Task.Run; OperationStatus writes its
  observable properties on the calling thread, so the final
  ShowIndicator=false never reached the binding.
- OperationIndicator overwrote its own DataContext from the Status
  property, which re-targeted the call-site binding. It now scopes the
  DataContext to an inner panel and collapses itself when Status is
  null; every call site switched from DataContext= to Status=.

Also gates the footer connection pill in the command body instead of
CanExecute (a disabled command greyed out the ONLINE chip), and extends
OperationTiming: pid per line, 4 MB rollover, fast successes dropped
(failures always kept), and DetailsIsland.BindAsync now carries the
selection trigger via TasksIslandViewModel.SelectFrom.

src/ClaudeDo.Ui/Views/Controls/OperationIndicator.axaml

@@ -3,8 +3,13 @@
              xmlns:svc="using:ClaudeDo.Ui.Services"
              xmlns:loc="using:ClaudeDo.Ui.Localization"
              x:Class="ClaudeDo.Ui.Views.Controls.OperationIndicator"
+             x:Name="Root"
              x:DataType="svc:OperationStatus">
+  <!-- DataContext is scoped to the inner panel, never to the UserControl itself: overriding the
+       control's own DataContext would re-target the `Status="{Binding ...}"` binding at every call
+       site (it resolves against this control's DataContext) and throw an InvalidCastException. -->
   <StackPanel Orientation="Horizontal" Spacing="{StaticResource SpaceSm}" VerticalAlignment="Center"
+              DataContext="{Binding #Root.Status}"
               IsVisible="{Binding ShowIndicator}">
     <Ellipse Classes="spinner" VerticalAlignment="Center"/>
     <TextBlock Classes="meta" VerticalAlignment="Center" Text="{Binding Label}"/>

src/ClaudeDo.Ui/Views/Controls/OperationIndicator.axaml.cs

@@ -15,12 +15,21 @@ public partial class OperationIndicator : UserControl
         set => SetValue(StatusProperty, value);
     }
 
-    public OperationIndicator() => InitializeComponent();
+    public OperationIndicator()
+    {
+        InitializeComponent();
+        IsVisible = false;
+    }
 
+    /// A null `Status` leaves the inner panel's DataContext null, so its `IsVisible="{Binding
+    /// ShowIndicator}"` can't resolve and falls back to the property default — *visible*. That
+    /// renders a label-less spinner plus the stalled hint forever. Collapse the whole control
+    /// instead. Deliberately a direct set, not a binding: no call site binds `IsVisible` on the
+    /// indicator, and a local value would win over one anyway.
     protected override void OnPropertyChanged(AvaloniaPropertyChangedEventArgs change)
     {
         base.OnPropertyChanged(change);
         if (change.Property == StatusProperty)
-            DataContext = change.GetNewValue<OperationStatus?>();
+            IsVisible = change.GetNewValue<OperationStatus?>() is not null;
     }
 }

src/ClaudeDo.Ui/Views/Islands/DetailsIslandView.axaml

@@ -160,7 +160,7 @@
                       Command="{Binding Prep.PlanDayCommand}"
                       IsEnabled="{Binding Prep.IsPlanDayEnabled}"
                       Content="{loc:Tr details.planDay}"/>
-              <ctl:OperationIndicator DataContext="{Binding Prep.PrepOperation}"/>
+              <ctl:OperationIndicator Status="{Binding Prep.PrepOperation}"/>
             </StackPanel>
           </Border>
           <Panel>

src/ClaudeDo.Ui/Views/Islands/TaskRowView.axaml.cs

@@ -31,7 +31,7 @@ public partial class TaskRowView : UserControl
 
         // OnTunnelPointerPressed (TasksIslandView) only selects on the left button, so
         // right-click needs its own explicit selection before the menu opens.
-        vm.SelectedTask = row;
+        vm.SelectFrom(row, "context-menu");
 
         var menu = new ContextMenu { DataContext = row };
 

src/ClaudeDo.Ui/Views/Islands/TasksIslandView.axaml

@@ -21,7 +21,7 @@
                      Foreground="{DynamicResource TextMuteBrush}"
                      Text="{Binding Subtitle}"
                      TextTrimming="CharacterEllipsis"/>
-          <ctl:OperationIndicator DataContext="{Binding PlanningOperation}"/>
+          <ctl:OperationIndicator Status="{Binding PlanningOperation}"/>
         </StackPanel>
 
         <StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="4"

src/ClaudeDo.Ui/Views/Islands/TasksIslandView.axaml.cs

@@ -131,7 +131,7 @@ public partial class TasksIslandView : UserControl
         if (!e.GetCurrentPoint(button).Properties.IsLeftButtonPressed) return;
 
         // Select now so the details pane updates whether the gesture becomes a click or a drag.
-        if (DataContext is TasksIslandViewModel vm) vm.SelectedTask = row;
+        if (DataContext is TasksIslandViewModel vm) vm.SelectFrom(row, "pointer-press");
 
         // If the click landed on a nested Button (e.g. the done-toggle checkbox or star),
         // don't start a drag — that would capture the pointer and swallow the inner Click.

src/ClaudeDo.Ui/Views/JumpToTaskHelper.cs

@@ -18,7 +18,7 @@ internal static class JumpToTaskHelper
         s.Lists.SelectedList = item;
 
         var existing = s.Tasks.Items.FirstOrDefault(r => r.Id == taskId);
-        if (existing is not null) { s.Tasks.SelectedTask = existing; return; }
+        if (existing is not null) { s.Tasks.SelectFrom(existing, "jump-to-task"); return; }
 
         var tcs = new TaskCompletionSource<bool>();
         void OnChanged(object? _, NotifyCollectionChangedEventArgs __)
@@ -32,7 +32,7 @@ internal static class JumpToTaskHelper
         {
             await Task.WhenAny(tcs.Task, Task.Delay(5000));
             var row = s.Tasks.Items.FirstOrDefault(r => r.Id == taskId);
-            if (row is not null) s.Tasks.SelectedTask = row;
+            if (row is not null) s.Tasks.SelectFrom(row, "jump-to-task");
         }
         finally
         {

src/ClaudeDo.Ui/Views/MainWindow.axaml

@@ -83,7 +83,7 @@
               <MenuItem Header="{loc:Tr shell.menu.about}" Command="{Binding OpenAboutCommand}"/>
             </MenuItem>
           </Menu>
-          <controls:OperationIndicator DataContext="{Binding UpdateCheck.Op}" Margin="8,0,0,0"/>
+          <controls:OperationIndicator Status="{Binding UpdateCheck.Op}" Margin="8,0,0,0"/>
         </StackPanel>
 
         <!-- Middle: draggable strip -->

src/ClaudeDo.Ui/Views/Modals/RepoImportModalView.axaml

@@ -39,7 +39,7 @@
                   Command="{Binding ForgetFoldersCommand}"
                   IsVisible="{Binding HasFolders}"/>
         </Grid>
-        <ctl:OperationIndicator DataContext="{Binding ScanOp}"/>
+        <ctl:OperationIndicator Status="{Binding ScanOp}"/>
       </StackPanel>
 
       <!-- Repo checklist -->

src/ClaudeDo.Ui/Views/Modals/SettingsModalView.axaml

@@ -281,7 +281,7 @@
                 <Button Classes="btn" Content="{loc:Tr settings.files.restoreDefaultAgents}"
                         Command="{Binding Files.RestoreDefaultAgentsCommand}"
                         HorizontalAlignment="Left"/>
-                <ctl:OperationIndicator DataContext="{Binding Files.RestoreOp}"/>
+                <ctl:OperationIndicator Status="{Binding Files.RestoreOp}"/>
               </StackPanel>
               <StackPanel Spacing="6">
                 <TextBlock Classes="section-label" Text="{loc:Tr settings.files.promptsSection}"/>
@@ -504,14 +504,14 @@
                   <Button Grid.Column="1" Classes="btn" Content="{loc:Tr settings.skills.installButton}"
                           Command="{Binding SessionSkills.InstallCommand}"/>
                 </Grid>
-                <ctl:OperationIndicator DataContext="{Binding SessionSkills.InstallOp}"/>
+                <ctl:OperationIndicator Status="{Binding SessionSkills.InstallOp}"/>
               </StackPanel>
 
               <Border BorderBrush="{DynamicResource LineBrush}" BorderThickness="0,1,0,0" Margin="0,2,0,0"/>
 
               <StackPanel Spacing="6">
                 <TextBlock Classes="section-label" Text="{loc:Tr settings.skills.installedSection}"/>
-                <ctl:OperationIndicator DataContext="{Binding SessionSkills.UpdateOp}"/>
+                <ctl:OperationIndicator Status="{Binding SessionSkills.UpdateOp}"/>
                 <ItemsControl ItemsSource="{Binding SessionSkills.Skills}">
                   <ItemsControl.ItemTemplate>
                     <DataTemplate x:DataType="services:SessionSkillDto">

src/ClaudeDo.Ui/Views/Modals/WeeklyReportModalView.axaml

@@ -26,7 +26,7 @@
                 IsVisible="{Binding EmptyStateVisible}"/>
         <Button Classes="btn" Content="{loc:Tr modals.weeklyReport.regenerate}" Command="{Binding GenerateCommand}"
                 IsVisible="{Binding HasReport}"/>
-        <ctl:OperationIndicator DataContext="{Binding GenerateOperation}"/>
+        <ctl:OperationIndicator Status="{Binding GenerateOperation}"/>
       </StackPanel>
 
       <TextBlock DockPanel.Dock="Top" Classes="meta" Margin="0,8,0,0"