fix(ui): stop clipping the last log line in scrollable output

Avalonia 12 leaves ScrollViewer.Padding out of the scroll Extent, so at
maximum offset the content still overhangs the viewport by the padding
height — the last lines were cut off and unreachable even after
ScrollToEnd(). Move the inset onto the content (Margin on the inner
ItemsControl/StackPanel) and leave the ScrollViewer padding-free.

Affects the work console Output/Git/Session tabs, the reusable session
terminal (task + prep log) and the log visualizer.

src/ClaudeDo.Ui/CLAUDE.md

@@ -111,6 +111,7 @@ snaps `CanResize="True"` windows, which is the opt-in), and it insets itself by
 
 - **`PathIcon` *fills* its geometry.** Line-art/stroke icons must be authored as filled geometry or rendered with a stroked `Path` (e.g. `Icon.PlanDay` via the `Path.plan-icon` style). A pure stroke path in a `PathIcon` is **invisible**.
 - **`NumericUpDown.Value` is `decimal?` and goes null while the box is empty** — i.e. every time the user clears a value to type a new one. Bound TwoWay to a non-nullable `int`/`decimal`, that null throws `InvalidCastException`. Either bind a `decimal?` property (as `AgentConfigEditorViewModel.MaxTurns` does) or add `Converter={StaticResource KeepLastNumber}`, which drops the null via `BindingOperations.DoNothing`.
+- **`ScrollViewer.Padding` is excluded from the Extent (Avalonia 12).** At max scroll the content still sticks out below the viewport by the padding height, so the last line(s) are clipped and unreachable — even after `ScrollToEnd()`. Put the inset on the *content* (`Margin` on the inner `ItemsControl`/`StackPanel`) instead. Verified headlessly: 12,8,12,4 on the viewer → last item 20px below the viewport; same inset as content margin → fully visible.
 - **Never bind bare punctuation gestures.** Window key bindings live on `MainWindow` (`Ctrl+K` search, `Ctrl+N` add-task). `OemQuestion` once held search focus and silently swallowed `#` app-wide on a German layout.
 - **`FocusClearing`'s Escape handler is scoped to `MainWindow`** (`AddClassHandler<MainWindow>`, not `<TopLevel>`) — it clears focus from a TextBox on Escape, mirroring click-outside. Modals are separate `Window` instances that bind their own Escape → close, so it never runs there. Mission Control's ConPTY tiles are in `MissionControlWindow`, also unaffected, so **Escape always reaches the PTY**.
 - **Review gate:** Approve & Merge stays disabled until the diff has been opened once, and re-locks per run → [review-merge](../../docs/explore-notes/review-merge.md).

src/ClaudeDo.Ui/Views/Islands/Detail/WorkConsole.axaml

@@ -269,11 +269,13 @@
                     Command="{Binding RejectReviewCommand}" />
           </Grid>
 
+          <!-- Inset lives on the content, NOT on the ScrollViewer: Avalonia 12 leaves
+               ScrollViewer.Padding out of the Extent, so at max scroll the last lines
+               sit below the viewport and stay unreachable. -->
           <ScrollViewer Name="LogScroll"
                         VerticalScrollBarVisibility="Visible"
-                        AllowAutoHide="False"
-                        Padding="12,8,12,4">
-            <ItemsControl ItemsSource="{Binding Log}">
+                        AllowAutoHide="False">
+            <ItemsControl ItemsSource="{Binding Log}" Margin="12,8,12,4">
               <ItemsControl.ItemTemplate>
                 <DataTemplate DataType="vm:LogLineViewModel">
                   <Grid ColumnDefinitions="60,*" Margin="0,1">
@@ -293,8 +295,8 @@
         </DockPanel>
 
         <!-- Git: the review + merge cockpit -->
-        <ScrollViewer IsVisible="{Binding IsGitTab}" Padding="14,10">
-          <StackPanel Spacing="14">
+        <ScrollViewer IsVisible="{Binding IsGitTab}">
+          <StackPanel Spacing="14" Margin="14,10">
 
             <!-- Merge controls — shown whenever there's a worktree / unit to merge.
                  Header reads REVIEW while a decision is pending, otherwise MERGE. -->
@@ -393,8 +395,8 @@
         </ScrollViewer>
 
         <!-- Session: subtask outcomes (review lives in Output, merge in Git) -->
-        <ScrollViewer IsVisible="{Binding IsSessionTab}" Padding="14,10">
-          <StackPanel Spacing="14">
+        <ScrollViewer IsVisible="{Binding IsSessionTab}">
+          <StackPanel Spacing="14" Margin="14,10">
 
             <!-- Attention band: a child failed, was cancelled, still needs its own
                  review, or reported roadblocks. The parent stays waiting until resolved. -->

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

@@ -51,11 +51,12 @@
       </Grid>
 
       <!-- ── Log output ── -->
+      <!-- Inset on the content, not on the ScrollViewer — Avalonia 12 excludes
+           ScrollViewer.Padding from the Extent, which clips the last log lines. -->
       <ScrollViewer Name="LogScroll"
                     VerticalScrollBarVisibility="Visible"
-                    AllowAutoHide="False"
-                    Padding="10,8,10,12">
-        <ItemsControl ItemsSource="{Binding #Root.Entries}">
+                    AllowAutoHide="False">
+        <ItemsControl ItemsSource="{Binding #Root.Entries}" Margin="10,8,10,12">
           <ItemsControl.ItemTemplate>
             <DataTemplate DataType="vm:LogLineViewModel">
               <Grid ColumnDefinitions="60,*" Margin="0,1">

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

@@ -42,8 +42,8 @@
 
       <!-- Last 30 min, newest-first -->
       <Border Classes="terminal" Margin="14,0,14,14">
-        <ScrollViewer VerticalScrollBarVisibility="Visible" AllowAutoHide="False" Padding="10,8">
-          <ItemsControl ItemsSource="{Binding Rows}">
+        <ScrollViewer VerticalScrollBarVisibility="Visible" AllowAutoHide="False">
+          <ItemsControl ItemsSource="{Binding Rows}" Margin="10,8">
             <ItemsControl.ItemTemplate>
               <DataTemplate DataType="vm:LogVisualizerRow">
                 <Grid ColumnDefinitions="64,*" Margin="0,1">