diff --git a/src/Offstream.App/Views/Pages/MetadataPage.xaml b/src/Offstream.App/Views/Pages/MetadataPage.xaml
index 47fc327..b8f8b43 100644
--- a/src/Offstream.App/Views/Pages/MetadataPage.xaml
+++ b/src/Offstream.App/Views/Pages/MetadataPage.xaml
@@ -1,873 +1,873 @@
-<UserControl x:Class="Offstream.App.Views.Pages.MetadataPage"
-             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
-             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
-             xmlns:res="clr-namespace:Offstream.App.Resources"
-             xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
-             xmlns:vm="clr-namespace:Offstream.App.ViewModels">
-
-    <UserControl.Resources>
-        <BooleanToVisibilityConverter x:Key="BooleanToVisibility" />
-
-        <!--
-            The "was …" line under a field, shown only where the proposal differs from the file.
-
-            A before-and-after on every field is three extra lines that say nothing three times
-            out of four, and it buries the one line that does.
-        -->
-        <Style x:Key="MetadataWasStyle" BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
-            <Setter Property="Margin" Value="0,3,0,0" />
-            <Setter Property="TextTrimming" Value="CharacterEllipsis" />
-            <Setter Property="TextWrapping" Value="NoWrap" />
-        </Style>
-
-        <!--  A label above its field, spaced from the field under it — the shape every other page uses.  -->
-        <Style x:Key="MetadataFieldStyle" TargetType="StackPanel">
-            <Setter Property="Margin" Value="0,0,0,10" />
-        </Style>
-
-        <!--  A value the match supplied and the user cannot type over, on its own line.  -->
-        <Style x:Key="MetadataValueStyle" TargetType="TextBlock">
-            <Setter Property="Margin" Value="0,0,0,2" />
-            <Setter Property="TextWrapping" Value="Wrap" />
-        </Style>
-
-        <!--
-            One scanned file, as it appears in the list.
-
-            An ItemsControl row template rather than a DataGrid: nothing else in this application
-            uses a DataGrid, WPF-UI does not theme one, and a grid dropped in here would carry its
-            own chrome, its own selection model and its own idea of a header into a shell built
-            out of cards.
-
-            The row shows *what will be written* — title, then artist and album, then the file it
-            came from — and nothing else. It used to open an editor underneath itself, and the
-            editor never fitted: measured, an opened row was 539 device-independent pixels inside
-            a viewport of 347, so picking a track hid the library it was picked from and pushed
-            the search results off the bottom edge. The editor is now a pane of its own to the
-            right, and picking a row moves nothing.
-
-            Every text column trims rather than wraps, and the list below disables horizontal
-            scrolling. That combination is load-bearing: a ScrollViewer that permits horizontal
-            scrolling measures its content at infinite width, so a star-sized column takes the
-            full unwrapped width of the longest file name in the folder and drags every other
-            column off the right-hand edge. One long name used to reshape the whole page.
-        -->
-        <DataTemplate x:Key="LibraryTrackTemplate" DataType="{x:Type vm:LibraryTrackViewModel}">
-            <!--
-                The right-hand padding is for the scroll bar. WPF-UI draws it as an overlay: it
-                is painted over the viewport rather than taking width from it, so the rows are
-                measured as though it were not there and it lands on top of the last column of
-                every row it covers. Nothing in the layout can discover that, so the room is
-                reserved.
-            -->
-            <Border Padding="8,10,20,10"
-                    BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
-                    BorderThickness="0,0,0,1"
-                    ToolTip="{Binding Path, Mode=OneTime}">
-                <Grid>
-                    <Grid.ColumnDefinitions>
-                        <ColumnDefinition Width="Auto" />
-                        <ColumnDefinition Width="Auto" />
-                        <ColumnDefinition Width="*" />
-                        <ColumnDefinition Width="Auto" />
-                    </Grid.ColumnDefinitions>
-
-                    <CheckBox Grid.Column="0"
-                              Margin="0,0,4,0"
-                              VerticalAlignment="Center"
-                              AutomationProperties.HelpText="{x:Static res:Strings.MetadataSaveHelp}"
-                              AutomationProperties.Name="{Binding FileName, Mode=OneTime}"
-                              IsChecked="{Binding IsSelected, Mode=TwoWay}" />
-
-                    <Border Grid.Column="1"
-                            Width="40"
-                            Height="40"
-                            Margin="0,0,12,0"
-                            VerticalAlignment="Center"
-                            Background="{DynamicResource ControlFillColorSecondaryBrush}"
-                            CornerRadius="4">
-                        <Image Source="{Binding SuggestedCoverArtSource, Mode=OneWay}" Stretch="UniformToFill" />
-                    </Border>
-
-                    <StackPanel Grid.Column="2"
-                                Margin="0,0,8,0"
-                                VerticalAlignment="Center">
-                        <TextBlock FontWeight="SemiBold"
-                                   Text="{Binding Title, Mode=OneWay}"
-                                   TextTrimming="CharacterEllipsis"
-                                   TextWrapping="NoWrap" />
-
-                        <TextBlock Foreground="{DynamicResource TextFillColorSecondaryBrush}"
-                                   Text="{Binding Summary, Mode=OneWay}"
-                                   TextTrimming="CharacterEllipsis"
-                                   TextWrapping="NoWrap" />
-
-                        <TextBlock Style="{StaticResource OffstreamHintStyle}"
-                                   Text="{Binding FileName, Mode=OneTime}"
-                                   TextTrimming="CharacterEllipsis"
-                                   TextWrapping="NoWrap" />
-
-                        <!--
-                            The reason a row failed, wrapped rather than trimmed. It is the one
-                            piece of text on the page the user can act on — a locked file, an
-                            expired sign-in, a throttle that has not cleared — and half of it is
-                            no use at all. It sits in the list rather than in the editor because
-                            a failure the user has to go looking for is one they will not find.
-                        -->
-                        <TextBlock Margin="0,4,0,0"
-                                   Foreground="{DynamicResource SystemFillColorCautionBrush}"
-                                   Text="{Binding FailureReason, Mode=OneWay}"
-                                   TextWrapping="Wrap"
-                                   Visibility="{Binding HasFailed, Converter={StaticResource BooleanToVisibility}}" />
-                    </StackPanel>
-
-                    <!--
-                        Which rows Save would touch, and where each one got to. Stacked rather
-                        than set side by side: the list column is now half the page, and two
-                        columns of status text left the title with nothing.
-                    -->
-                    <StackPanel Grid.Column="3" VerticalAlignment="Center">
-                        <TextBlock HorizontalAlignment="Right"
-                                   Foreground="{DynamicResource TextFillColorSecondaryBrush}"
-                                   Text="{Binding StatusText, Mode=OneWay}"
-                                   TextTrimming="CharacterEllipsis"
-                                   TextWrapping="NoWrap" />
-
-                        <Border Margin="0,4,0,0"
-                                Padding="7,2"
-                                HorizontalAlignment="Right"
-                                Background="{DynamicResource ControlFillColorSecondaryBrush}"
-                                BorderBrush="{StaticResource OffstreamAccentBrush}"
-                                BorderThickness="1"
-                                CornerRadius="10"
-                                Visibility="{Binding HasPendingChanges, Converter={StaticResource BooleanToVisibility}}">
-                            <TextBlock Style="{StaticResource CaptionTextBlockStyle}" Text="{x:Static res:Strings.MetadataWillChange}" />
-                        </Border>
-                    </StackPanel>
-                </Grid>
-            </Border>
-        </DataTemplate>
-
-        <!--
-            The editor for whichever row is picked.
-
-            Two versions of this lived inside the row and both failed the same way: the panel was
-            larger than the box it opened in. The third failure was measured rather than argued
-            about — 539 device-independent pixels of editor inside a 347-pixel viewport — which is
-            a deficit no amount of tightening closes, because even a perfect fit leaves the list
-            showing exactly one file.
-
-            So it is a pane instead. It is always the same height, always in the same place, and
-            changing the pick swaps its contents without moving anything else on the page. That
-            also gives the list's selected row a job, which is why the highlight removed from it a
-            change ago is back: it now marks the row this pane is editing rather than following
-            the arrow keys around meaning nothing.
-
-            One scroll region, not two. The fields and the search box fit without scrolling; the
-            results push past the bottom only once a search has returned some, and then the whole
-            pane scrolls rather than a box nested inside it.
-        -->
-        <DataTemplate x:Key="LibraryEditorTemplate" DataType="{x:Type vm:LibraryTrackViewModel}">
-            <Grid>
-                <Grid.RowDefinitions>
-                    <RowDefinition Height="Auto" />
-                    <RowDefinition Height="*" />
-                    <RowDefinition Height="Auto" />
-                </Grid.RowDefinitions>
-
-                <StackPanel Grid.Row="0" Margin="0,0,0,10">
-                    <TextBlock FontWeight="SemiBold"
-                               Text="{Binding Title, Mode=OneWay}"
-                               TextTrimming="CharacterEllipsis"
-                               TextWrapping="NoWrap" />
-
-                    <TextBlock Style="{StaticResource OffstreamHintStyle}"
-                               Text="{Binding FileName, Mode=OneTime}"
-                               TextTrimming="CharacterEllipsis"
-                               TextWrapping="NoWrap"
-                               ToolTip="{Binding Path, Mode=OneTime}" />
-
-                    <Border Margin="0,8,0,0"
-                            BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
-                            BorderThickness="0,1,0,0" />
-                </StackPanel>
-
-                <ScrollViewer Grid.Row="1"
-                              Padding="0,0,12,0"
-                              VerticalScrollBarVisibility="Auto">
-                    <!--
-                        Capped rather than filling the pane. These fields hold a song title, not a
-                        paragraph, and a box eight hundred pixels wide for the word "Renegade"
-                        puts the caret an inch from the label that names it.
-
-                        The cap is a star column with a MaxWidth beside an empty Auto one, not a
-                        MaxWidth on the panel itself. A panel aligned Left is arranged at its
-                        *desired* width, and a Grid's desired width is what its content asked for
-                        — so capping it that way collapsed every star column onto its own text and
-                        left four boxes each sized to the word inside it.
-                    -->
-                    <Grid>
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="*" MaxWidth="620" />
-                            <ColumnDefinition Width="Auto" />
-                        </Grid.ColumnDefinitions>
-
-                        <!--
-                            Two columns, not ten stacked boxes. Measured at the shell's minimum
-                            window the pane is 444 DIP wide and its scrolling region 347 DIP tall,
-                            while a field costs 65 DIP of height and reads perfectly well at half
-                            that width — the numeric boxes are 216 DIP and nobody has trouble with
-                            them. Stacked, the ten fields came to 650 DIP and put seven of them
-                            below the fold, where a scroll bar is the only evidence they exist.
-                            Paired, they come to 390 DIP: one row over at the smallest window
-                            Offstream allows, and all of it visible at any size anybody uses.
-
-                            Title and copyright span both columns because neither is a short value
-                            — one is what the row is named after, and the other is a sentence.
-                        -->
-                        <Grid Grid.Column="0">
-                            <Grid.ColumnDefinitions>
-                                <ColumnDefinition Width="*" />
-                                <ColumnDefinition Width="12" />
-                                <ColumnDefinition Width="*" />
-                            </Grid.ColumnDefinitions>
-
-                            <Grid.RowDefinitions>
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                                <RowDefinition Height="Auto" />
-                            </Grid.RowDefinitions>
-
-                            <StackPanel Grid.Row="0" Grid.ColumnSpan="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTitle}" />
-
-                                <TextBox x:Name="TitleBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTitle}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTitle}"
-                                         Text="{Binding Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasTitleChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentTitle, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TitleBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="1" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldArtist}" />
-
-                                <TextBox x:Name="ArtistBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldArtist}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldArtist}"
-                                         Text="{Binding Artist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasArtistChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentArtist, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=ArtistBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="1" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldAlbumArtist}" />
-
-                                <TextBox x:Name="AlbumArtistBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataListHint}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldAlbumArtist}"

-                                                                     ToolTip="{x:Static res:Strings.MetadataListHint}"
-                                         Text="{Binding AlbumArtist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasAlbumArtistChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentAlbumArtist, Mode=OneTime}" />
-                                </TextBlock>
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="2" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldAlbum}" />
-
-                                <TextBox x:Name="AlbumBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldAlbum}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldAlbum}"
-                                         Text="{Binding Album, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasAlbumChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentAlbum, Mode=OneTime}" />
-                                </TextBlock>
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="2" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldGenre}" />
-
-                                <TextBox x:Name="GenresBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataListHint}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldGenre}"

-                                                                     ToolTip="{x:Static res:Strings.MetadataListHint}"
-                                         Text="{Binding Genres, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasGenreChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentGenres, Mode=OneTime}" />
-                                </TextBlock>
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldYear}" />
-
-                                <TextBox x:Name="YearBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldYear}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldYear}"
-                                         Text="{Binding Year, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasYearChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentYear, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=YearBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="3" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldDisc}" />
-
-                                <TextBox x:Name="DiscBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldDisc}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldDisc}"
-                                         Text="{Binding Disc, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasDiscChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentDisc, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=DiscBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="4" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTrackNumber}" />
-
-                                <TextBox x:Name="TrackNumberBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTrackNumber}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTrackNumber}"
-                                         Text="{Binding TrackNumber, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasTrackNumberChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentTrackNumber, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TrackNumberBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="4" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTrackCount}" />
-
-                                <TextBox x:Name="TrackCountBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTrackCount}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTrackCount}"
-                                         Text="{Binding TrackCount, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasTrackCountChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentTrackCount, Mode=OneTime}" />
-                                </TextBlock>
-
-                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TrackCountBox, Path=(Validation.Errors)/ErrorContent}" />
-                            </StackPanel>
-
-                            <StackPanel Grid.Row="5" Grid.ColumnSpan="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldCopyright}" />
-
-                                <TextBox x:Name="CopyrightBox"
-                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldCopyright}"
-                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldCopyright}"
-                                         Text="{Binding Copyright, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
-
-                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                           TextTrimming="CharacterEllipsis"
-                                           TextWrapping="NoWrap"
-                                           Visibility="{Binding HasCopyrightChange, Converter={StaticResource BooleanToVisibility}}">
-                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
-                                    <Run Text="{Binding CurrentCopyright, Mode=OneTime}" />
-                                </TextBlock>
-                            </StackPanel>
-
-                            <!--
-                                Artwork is the one tag with no box, because a picture is not
-                                something to type. It is still written by Save, so a row can say
-                                "will change" with every field beside it matching the file — and a
-                                badge with no visible cause reads as a bug rather than as
-                                information. Before and after, side by side, is the only way a
-                                changed picture is visible at all.
-                            -->
-                            <StackPanel Grid.Row="6"
-                                        Grid.ColumnSpan="3"
-                                        Grid.Column="0"
-                                        Style="{StaticResource MetadataFieldStyle}"
-                                        Visibility="{Binding HasCoverArtChange, Converter={StaticResource BooleanToVisibility}}">
-                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldArtwork}" />
-
-                                <StackPanel Margin="0,8,0,0" Orientation="Horizontal">
-                                    <StackPanel Margin="0,0,14,0">
-                                        <Image Width="44"
-                                               Height="44"
-                                               Source="{Binding ExistingCoverArt, Mode=OneTime}"
-                                               Stretch="UniformToFill" />
-
-                                        <TextBlock Style="{StaticResource MetadataWasStyle}" Text="{x:Static res:Strings.MetadataCoverBefore}" />
-                                    </StackPanel>
-
-                                    <StackPanel>
-                                        <Image Width="44"
-                                               Height="44"
-                                               Source="{Binding SuggestedCoverArtSource, Mode=OneWay}"
-                                               Stretch="UniformToFill" />
-
-                                        <TextBlock Style="{StaticResource MetadataWasStyle}" Text="{x:Static res:Strings.MetadataCoverAfter}" />
-                                    </StackPanel>
-                                </StackPanel>
-                            </StackPanel>
-                        </Grid>
-                    </Grid>
-                </ScrollViewer>
-
-                <!--
-                    The answer to a wrong match, pinned to the bottom of the pane rather than left
-                    to follow the fields down.
-
-                    It needs its own search rather than another Re-fetch because the automatic
-                    lookup builds its query from the file and then rejects any result whose artist
-                    disagrees with it — so the one case it cannot help with is a file whose artist
-                    is wrong, and asking it again returns the same answer. This asks Spotify what
-                    the user typed and shows everything it says.
-
-                    Pinned because the results are the thing the user just asked for. With the
-                    whole pane scrolling as one, ten results appeared below the fold behind a
-                    scroll bar, and the only sign that the search had worked at all was that the
-                    bar got smaller. The fields scroll in the space above instead: they are what
-                    the user is willing to go looking for, having already read them.
-                -->
-                <StackPanel Grid.Row="2">
-                    <Border Margin="0,8,0,10"
-                            BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
-                            BorderThickness="0,1,0,0" />
-
-                    <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataWrongMatchHeading}" />
-
-                    <!--
-                        Both buttons sit on the line with the box because they are two ways of
-                        asking the same question, and neither is worth a row of its own.
-                    -->
-                    <Grid>
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="*" />
-                            <ColumnDefinition Width="Auto" />
-                            <ColumnDefinition Width="Auto" />
-                        </Grid.ColumnDefinitions>
-
-                        <ui:TextBox Grid.Column="0"
-                                    Margin="0,0,8,0"
-                                    VerticalAlignment="Center"
-                                    AutomationProperties.HelpText="{x:Static res:Strings.MetadataSearchHelp}"
-                                    AutomationProperties.Name="{x:Static res:Strings.MetadataSearchLabel}"
-                                    PlaceholderText="{x:Static res:Strings.MetadataSearchLabel}"
-                                    Text="{Binding MatchQuery, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
-                                    ToolTip="{x:Static res:Strings.MetadataSearchHelp}" />
-
-                        <ui:Button Grid.Column="1"
-                                   Margin="0,0,8,0"
-                                   VerticalAlignment="Center"
-                                   Command="{Binding DataContext.SearchMatchesCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
-                                   CommandParameter="{Binding}"
-                                   Content="{x:Static res:Strings.MetadataSearchAction}"
-                                   IsEnabled="{Binding IsNotSearching, Mode=OneWay}"
-                                   ToolTip="{x:Static res:Strings.MetadataSearchHelp}" />
-
-                        <ui:Button Grid.Column="2"
-                                   VerticalAlignment="Center"
-                                   AutomationProperties.HelpText="{x:Static res:Strings.MetadataRefetchHelp}"
-                                   Command="{Binding DataContext.RefetchCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
-                                   CommandParameter="{Binding}"
-                                   Content="{x:Static res:Strings.MetadataRefetch}"
-                                   ToolTip="{x:Static res:Strings.MetadataRefetchHelp}" />
-                    </Grid>
-
-                    <TextBlock Margin="0,6,0,0"
-                               AutomationProperties.LiveSetting="Polite"
-                               Style="{StaticResource MetadataWasStyle}"
-                               Text="{x:Static res:Strings.MetadataSearching}"
-                               Visibility="{Binding IsSearching, Converter={StaticResource BooleanToVisibility}}" />
-
-                    <TextBlock Margin="0,6,0,0"
-                               AutomationProperties.LiveSetting="Polite"
-                               Style="{StaticResource MetadataWasStyle}"
-                               Text="{Binding SearchMessage, Mode=OneWay}"
-                               TextWrapping="Wrap" />
-
-                    <!--
-                        Capped and scrollable. Ten results is a normal answer from Spotify and
-                        they cannot all be shown — but the cap is on the box, not on the search:
-                        the whole point of this list is that the user sees what Spotify actually
-                        returned rather than the one answer the matcher liked.
-                    -->
-                    <ScrollViewer MaxHeight="132"
-                                  Margin="0,8,0,0"
-                                  Padding="0,0,12,0"
-                                  VerticalScrollBarVisibility="Auto"
-                                  Visibility="{Binding HasCandidates, Converter={StaticResource BooleanToVisibility}}">
-                        <ItemsControl ItemsSource="{Binding Candidates, Mode=OneWay}">
-                            <ItemsControl.ItemTemplate>
-                                <DataTemplate DataType="{x:Type vm:LibraryMatchViewModel}">
-                                    <Border Margin="0,0,0,6"
-                                            Padding="10,7"
-                                            Background="{StaticResource OffstreamSurfaceBrush}"
-                                            CornerRadius="6">
-                                        <Grid>
-                                            <Grid.ColumnDefinitions>
-                                                <ColumnDefinition Width="*" />
-                                                <ColumnDefinition Width="Auto" />
-                                            </Grid.ColumnDefinitions>
-
-                                            <StackPanel Grid.Column="0"
-                                                        Margin="0,0,10,0"
-                                                        VerticalAlignment="Center">
-                                                <TextBlock Text="{Binding Title, Mode=OneTime}"
-                                                           TextTrimming="CharacterEllipsis"
-                                                           TextWrapping="NoWrap" />
-
-                                                <TextBlock Style="{StaticResource MetadataWasStyle}"
-                                                           Text="{Binding Summary, Mode=OneTime}"
-                                                           TextTrimming="CharacterEllipsis"
-                                                           TextWrapping="NoWrap" />
-                                            </StackPanel>
-
-                                            <ui:Button Grid.Column="1"
-                                                       VerticalAlignment="Center"
-                                                       AutomationProperties.HelpText="{x:Static res:Strings.MetadataUseMatchHelp}"
-                                                       Command="{Binding DataContext.UseMatchCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
-                                                       CommandParameter="{Binding}"
-                                                       Content="{x:Static res:Strings.MetadataUseMatch}"
-                                                       ToolTip="{x:Static res:Strings.MetadataUseMatchHelp}" />
-                                        </Grid>
-                                    </Border>
-                                </DataTemplate>
-                            </ItemsControl.ItemTemplate>
-                        </ItemsControl>
-                    </ScrollViewer>
-                </StackPanel>
-            </Grid>
-        </DataTemplate>
-    </UserControl.Resources>
-
-    <!--
-        Repairing tags on files that already exist.
-
-        The page is three steps in one direction and only the last one writes: scan reads, fetch
-        proposes, save commits. Keeping them as three buttons rather than one "fix my library"
-        action is deliberate — an automatic match is wrong often enough that the review step is
-        the feature, not friction in front of it.
-
-        Below the buttons it is a list beside an editor. That split is what makes the review step
-        usable: the library stays on screen while one of its files is being corrected, and the
-        pane holding the correction never changes size or position as the pick moves through it.
-    -->
-    <Border Padding="12" Style="{StaticResource OffstreamCardStyle}">
-        <Grid>
-            <Grid.RowDefinitions>
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="*" />
-            </Grid.RowDefinitions>
-
-            <!--
-                What the page is for is a tooltip on its heading rather than a paragraph under it,
-                the same trade the Advanced page makes for its settings: a line of prose costs
-                every row below it a share of a window that has none to give, and this one cost
-                the list forty pixels it needed more.
-            -->
-            <ContentControl Grid.Row="0"
-                            Content="{x:Static res:Strings.MetadataHeading}"
-                            Style="{StaticResource OffstreamGroupHeaderStyle}"
-                            ToolTip="{x:Static res:Strings.MetadataIntro}" />
-
-            <Grid Grid.Row="1" Margin="0,0,0,10">
-                <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="Auto" />
-                    <ColumnDefinition Width="*" />
-                    <ColumnDefinition Width="Auto" />
-                </Grid.ColumnDefinitions>
-
-                <TextBlock Grid.Column="0"
-                           Margin="0,0,8,0"
-                           VerticalAlignment="Center"
-                           Style="{StaticResource OffstreamFieldLabelStyle}"
-                           Text="{x:Static res:Strings.MetadataFolderLabel}" />
-
-                <TextBox Grid.Column="1"
-                         Margin="0,0,8,0"
-                         VerticalAlignment="Center"
-                         AutomationProperties.AutomationId="MetadataFolder"
-                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFolderHelp}"
-                         AutomationProperties.Name="{x:Static res:Strings.MetadataFolderLabel}"
-                         Text="{Binding Folder, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
-                         ToolTip="{x:Static res:Strings.MetadataFolderHelp}" />
-
-                <ui:Button Grid.Column="2"
-                           AutomationProperties.AutomationId="MetadataBrowse"
-                           Command="{Binding BrowseCommand}"
-                           Content="{x:Static res:Strings.MetadataBrowse}"
-                           IsEnabled="{Binding IsIdle, Mode=OneWay}" />
-            </Grid>
-
-            <Grid Grid.Row="2" Margin="0,0,0,10">
-                <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="Auto" />
-                    <ColumnDefinition Width="*" />
-                </Grid.ColumnDefinitions>
-
-                <StackPanel Grid.Column="0" Orientation="Horizontal">
-                    <ui:Button Margin="0,0,8,0"
-                               AutomationProperties.AutomationId="MetadataScan"
-                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataScanHelp}"
-                               Command="{Binding ScanCommand}"
-                               Content="{x:Static res:Strings.MetadataScan}"
-                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
-                               ToolTip="{x:Static res:Strings.MetadataScanHelp}" />
-
-                    <ui:Button Margin="0,0,8,0"
-                               AutomationProperties.AutomationId="MetadataAutoFetch"
-                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataAutoFetchHelp}"
-                               Command="{Binding AutoFetchCommand}"
-                               Content="{x:Static res:Strings.MetadataAutoFetch}"
-                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
-                               ToolTip="{x:Static res:Strings.MetadataAutoFetchHelp}" />
-
-                    <ui:Button Appearance="Primary"
-                               AutomationProperties.AutomationId="MetadataSaveSelected"
-                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataSaveHelp}"
-                               Command="{Binding SaveSelectedCommand}"
-                               Content="{x:Static res:Strings.MetadataSaveSelected}"
-                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
-                               ToolTip="{x:Static res:Strings.MetadataSaveHelp}" />
-                </StackPanel>
-
-                <TextBlock Grid.Column="1"
-                           Margin="12,0,0,0"
-                           VerticalAlignment="Center"
-                           AutomationProperties.LiveSetting="Polite"
-                           Style="{StaticResource OffstreamHintStyle}"
-                           Text="{Binding StatusMessage, Mode=OneWay}"
-                           TextTrimming="CharacterEllipsis" />
-            </Grid>
-
-            <Grid Grid.Row="3">
-                <Grid.ColumnDefinitions>
-                    <ColumnDefinition Width="*" MinWidth="300" />
-                    <ColumnDefinition Width="12" />
-                    <ColumnDefinition Width="1.1*" MinWidth="340" />
-                </Grid.ColumnDefinitions>
-
-                <Grid Grid.Column="0">
-                    <Grid.RowDefinitions>
-                        <RowDefinition Height="Auto" />
-                        <RowDefinition Height="*" />
-                    </Grid.RowDefinitions>
-
-                    <!--
-                        The filter narrows what is drawn and nothing else. It sits over the list
-                        rather than beside the buttons because it belongs to the list: the buttons
-                        act on the whole library whatever is typed here, and putting it in their
-                        row would suggest otherwise.
-                    -->
-                    <Grid Grid.Row="0"
-                          Margin="0,0,0,8"
-                          Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}">
-                        <Grid.ColumnDefinitions>
-                            <ColumnDefinition Width="*" />
-                            <ColumnDefinition Width="Auto" />
-                        </Grid.ColumnDefinitions>
-
-                        <ui:TextBox Grid.Column="0"
-                                    VerticalAlignment="Center"
-                                    AutomationProperties.AutomationId="MetadataFilter"
-                                    AutomationProperties.HelpText="{x:Static res:Strings.MetadataFilterHelp}"
-                                    AutomationProperties.Name="{x:Static res:Strings.MetadataFilterLabel}"
-                                    PlaceholderText="{x:Static res:Strings.MetadataFilterPlaceholder}"
-                                    Text="{Binding Filter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
-                                    ToolTip="{x:Static res:Strings.MetadataFilterHelp}" />
-
-                        <TextBlock Grid.Column="1"
-                                   Margin="10,0,0,0"
-                                   VerticalAlignment="Center"
-                                   AutomationProperties.LiveSetting="Polite"
-                                   Style="{StaticResource OffstreamHintStyle}"
-                                   Text="{Binding FilterSummary, Mode=OneWay}"
-                                   Visibility="{Binding IsFiltered, Converter={StaticResource BooleanToVisibility}}" />
-                    </Grid>
-
-                    <TextBlock Grid.Row="1"
-                               Margin="4,12,0,0"
-                               VerticalAlignment="Top"
-                               Text="{x:Static res:Strings.MetadataEmpty}"
-                               TextWrapping="Wrap">
-                        <TextBlock.Style>
-                            <Style BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
-                                <Setter Property="Visibility" Value="Visible" />
-                                <Style.Triggers>
-                                    <DataTrigger Binding="{Binding HasTracks, Mode=OneWay}" Value="True">
-                                        <Setter Property="Visibility" Value="Collapsed" />
-                                    </DataTrigger>
-                                </Style.Triggers>
-                            </Style>
-                        </TextBlock.Style>
-                    </TextBlock>
-
-                    <TextBlock Grid.Row="1"
-                               Margin="4,12,0,0"
-                               VerticalAlignment="Top"
-                               AutomationProperties.LiveSetting="Polite"
-                               Style="{StaticResource OffstreamHintStyle}"
-                               Text="{x:Static res:Strings.MetadataNoMatches}"
-                               TextWrapping="Wrap"
-                               Visibility="{Binding HasNoMatches, Converter={StaticResource BooleanToVisibility}}" />
-
-                    <!--
-                        Virtualised: a music folder is thousands of files, and each row carries a
-                        decoded thumbnail. Without recycling, scanning a real library builds every
-                        one of them up front and the page stops responding before it finishes
-                        drawing.
-
-                        Horizontal scrolling is disabled rather than automatic, which is what
-                        forces the rows to be measured at the width actually available. See the
-                        row template.
-
-                        Scrolling is by pixel, not by item. A row here is a three-line block, so
-                        the default — three *items* per wheel notch — moved the list most of a
-                        screen at a time and made it unusable with a mouse.
-                    -->
-                    <ListBox Grid.Row="1"
-                             AutomationProperties.AutomationId="MetadataTrackList"
-                             Background="Transparent"
-                             BorderThickness="0"
-                             ItemTemplate="{StaticResource LibraryTrackTemplate}"
-                             ItemsSource="{Binding VisibleTracks, Mode=OneWay}"
-                             ScrollViewer.HorizontalScrollBarVisibility="Disabled"
-                             SelectedItem="{Binding SelectedTrack, Mode=TwoWay}"
-                             Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}"
-                             VirtualizingPanel.IsVirtualizing="True"
-                             VirtualizingPanel.ScrollUnit="Pixel"
-                             VirtualizingPanel.VirtualizationMode="Recycling">
-                        <!--
-                            The selected row is marked, but quietly. The themed container paints a
-                            saturated fill and an accent bar down the side, which on a list of
-                            three-line rows reads as an alarm rather than a pointer — and it was
-                            worse than useless while nothing acted on the selection at all. Now
-                            the pane on the right is what the selection means, so the row needs to
-                            say which one it is showing: a tinted background and a narrow accent
-                            edge, and no change to the text.
-
-                            The template is replaced rather than the brushes overridden, because
-                            setting the brushes leaves the themed accent bar in place underneath.
-                        -->
-                        <ListBox.ItemContainerStyle>
-                            <Style TargetType="ListBoxItem">
-                                <Setter Property="HorizontalContentAlignment" Value="Stretch" />
-                                <Setter Property="Padding" Value="0" />
-                                <Setter Property="Background" Value="Transparent" />
-                                <Setter Property="BorderThickness" Value="0" />
-                                <Setter Property="Template">
-                                    <Setter.Value>
-                                        <ControlTemplate TargetType="ListBoxItem">
-                                            <Border x:Name="Pick"
-                                                    Background="Transparent"
-                                                    BorderBrush="Transparent"
-                                                    BorderThickness="3,0,0,0">
-                                                <ContentPresenter HorizontalAlignment="Stretch" />
-                                            </Border>
-
-                                            <ControlTemplate.Triggers>
-                                                <Trigger Property="IsSelected" Value="True">
-                                                    <Setter TargetName="Pick" Property="Background" Value="{DynamicResource ControlFillColorSecondaryBrush}" />
-                                                    <Setter TargetName="Pick" Property="BorderBrush" Value="{StaticResource OffstreamAccentBrush}" />
-                                                </Trigger>
-                                            </ControlTemplate.Triggers>
-                                        </ControlTemplate>
-                                    </Setter.Value>
-                                </Setter>
-                            </Style>
-                        </ListBox.ItemContainerStyle>
-                    </ListBox>
-                </Grid>
-
-                <Border Grid.Column="2"
-                        Padding="16,14"
-                        Background="{StaticResource OffstreamWellBrush}"
-                        BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
-                        BorderThickness="1"
-                        CornerRadius="8"
-                        Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}">
-                    <Grid>
-                        <TextBlock VerticalAlignment="Top"
-                                   Text="{x:Static res:Strings.MetadataNoSelection}"
-                                   TextWrapping="Wrap">
-                            <TextBlock.Style>
-                                <Style BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
-                                    <Setter Property="Visibility" Value="Visible" />
-                                    <Style.Triggers>
-                                        <DataTrigger Binding="{Binding HasSelection, Mode=OneWay}" Value="True">
-                                            <Setter Property="Visibility" Value="Collapsed" />
-                                        </DataTrigger>
-                                    </Style.Triggers>
-                                </Style>
-                            </TextBlock.Style>
-                        </TextBlock>
-
-                        <ContentControl HorizontalContentAlignment="Stretch"
-                                        VerticalContentAlignment="Stretch"
-                                        AutomationProperties.AutomationId="MetadataEditor"
-                                        AutomationProperties.Name="{x:Static res:Strings.MetadataEditorHeading}"
-                                        Content="{Binding SelectedTrack, Mode=OneWay}"
-                                        ContentTemplate="{StaticResource LibraryEditorTemplate}"
-                                        Visibility="{Binding HasSelection, Converter={StaticResource BooleanToVisibility}}" />
-                    </Grid>
-                </Border>
-            </Grid>
-        </Grid>
-    </Border>
-
-</UserControl>
+<UserControl x:Class="Offstream.App.Views.Pages.MetadataPage"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:res="clr-namespace:Offstream.App.Resources"
+             xmlns:ui="http://schemas.lepo.co/wpfui/2022/xaml"
+             xmlns:vm="clr-namespace:Offstream.App.ViewModels">
+
+    <UserControl.Resources>
+        <BooleanToVisibilityConverter x:Key="BooleanToVisibility" />
+
+        <!--
+            The "was …" line under a field, shown only where the proposal differs from the file.
+
+            A before-and-after on every field is three extra lines that say nothing three times
+            out of four, and it buries the one line that does.
+        -->
+        <Style x:Key="MetadataWasStyle" BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
+            <Setter Property="Margin" Value="0,3,0,0" />
+            <Setter Property="TextTrimming" Value="CharacterEllipsis" />
+            <Setter Property="TextWrapping" Value="NoWrap" />
+        </Style>
+
+        <!--  A label above its field, spaced from the field under it — the shape every other page uses.  -->
+        <Style x:Key="MetadataFieldStyle" TargetType="StackPanel">
+            <Setter Property="Margin" Value="0,0,0,10" />
+        </Style>
+
+        <!--  A value the match supplied and the user cannot type over, on its own line.  -->
+        <Style x:Key="MetadataValueStyle" TargetType="TextBlock">
+            <Setter Property="Margin" Value="0,0,0,2" />
+            <Setter Property="TextWrapping" Value="Wrap" />
+        </Style>
+
+        <!--
+            One scanned file, as it appears in the list.
+
+            An ItemsControl row template rather than a DataGrid: nothing else in this application
+            uses a DataGrid, WPF-UI does not theme one, and a grid dropped in here would carry its
+            own chrome, its own selection model and its own idea of a header into a shell built
+            out of cards.
+
+            The row shows *what will be written* — title, then artist and album, then the file it
+            came from — and nothing else. It used to open an editor underneath itself, and the
+            editor never fitted: measured, an opened row was 539 device-independent pixels inside
+            a viewport of 347, so picking a track hid the library it was picked from and pushed
+            the search results off the bottom edge. The editor is now a pane of its own to the
+            right, and picking a row moves nothing.
+
+            Every text column trims rather than wraps, and the list below disables horizontal
+            scrolling. That combination is load-bearing: a ScrollViewer that permits horizontal
+            scrolling measures its content at infinite width, so a star-sized column takes the
+            full unwrapped width of the longest file name in the folder and drags every other
+            column off the right-hand edge. One long name used to reshape the whole page.
+        -->
+        <DataTemplate x:Key="LibraryTrackTemplate" DataType="{x:Type vm:LibraryTrackViewModel}">
+            <!--
+                The right-hand padding is for the scroll bar. WPF-UI draws it as an overlay: it
+                is painted over the viewport rather than taking width from it, so the rows are
+                measured as though it were not there and it lands on top of the last column of
+                every row it covers. Nothing in the layout can discover that, so the room is
+                reserved.
+            -->
+            <Border Padding="8,10,20,10"
+                    BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
+                    BorderThickness="0,0,0,1"
+                    ToolTip="{Binding Path, Mode=OneTime}">
+                <Grid>
+                    <Grid.ColumnDefinitions>
+                        <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="Auto" />
+                        <ColumnDefinition Width="*" />
+                        <ColumnDefinition Width="Auto" />
+                    </Grid.ColumnDefinitions>
+
+                    <CheckBox Grid.Column="0"
+                              Margin="0,0,4,0"
+                              VerticalAlignment="Center"
+                              AutomationProperties.HelpText="{x:Static res:Strings.MetadataSaveHelp}"
+                              AutomationProperties.Name="{Binding FileName, Mode=OneTime}"
+                              IsChecked="{Binding IsSelected, Mode=TwoWay}" />
+
+                    <Border Grid.Column="1"
+                            Width="40"
+                            Height="40"
+                            Margin="0,0,12,0"
+                            VerticalAlignment="Center"
+                            Background="{DynamicResource ControlFillColorSecondaryBrush}"
+                            CornerRadius="4">
+                        <Image Source="{Binding SuggestedCoverArtSource, Mode=OneWay}" Stretch="UniformToFill" />
+                    </Border>
+
+                    <StackPanel Grid.Column="2"
+                                Margin="0,0,8,0"
+                                VerticalAlignment="Center">
+                        <TextBlock FontWeight="SemiBold"
+                                   Text="{Binding Title, Mode=OneWay}"
+                                   TextTrimming="CharacterEllipsis"
+                                   TextWrapping="NoWrap" />
+
+                        <TextBlock Foreground="{DynamicResource TextFillColorSecondaryBrush}"
+                                   Text="{Binding Summary, Mode=OneWay}"
+                                   TextTrimming="CharacterEllipsis"
+                                   TextWrapping="NoWrap" />
+
+                        <TextBlock Style="{StaticResource OffstreamHintStyle}"
+                                   Text="{Binding FileName, Mode=OneTime}"
+                                   TextTrimming="CharacterEllipsis"
+                                   TextWrapping="NoWrap" />
+
+                        <!--
+                            The reason a row failed, wrapped rather than trimmed. It is the one
+                            piece of text on the page the user can act on — a locked file, an
+                            expired sign-in, a throttle that has not cleared — and half of it is
+                            no use at all. It sits in the list rather than in the editor because
+                            a failure the user has to go looking for is one they will not find.
+                        -->
+                        <TextBlock Margin="0,4,0,0"
+                                   Foreground="{DynamicResource SystemFillColorCautionBrush}"
+                                   Text="{Binding FailureReason, Mode=OneWay}"
+                                   TextWrapping="Wrap"
+                                   Visibility="{Binding HasFailed, Converter={StaticResource BooleanToVisibility}}" />
+                    </StackPanel>
+
+                    <!--
+                        Which rows Save would touch, and where each one got to. Stacked rather
+                        than set side by side: the list column is now half the page, and two
+                        columns of status text left the title with nothing.
+                    -->
+                    <StackPanel Grid.Column="3" VerticalAlignment="Center">
+                        <TextBlock HorizontalAlignment="Right"
+                                   Foreground="{DynamicResource TextFillColorSecondaryBrush}"
+                                   Text="{Binding StatusText, Mode=OneWay}"
+                                   TextTrimming="CharacterEllipsis"
+                                   TextWrapping="NoWrap" />
+
+                        <Border Margin="0,4,0,0"
+                                Padding="7,2"
+                                HorizontalAlignment="Right"
+                                Background="{DynamicResource ControlFillColorSecondaryBrush}"
+                                BorderBrush="{StaticResource OffstreamAccentBrush}"
+                                BorderThickness="1"
+                                CornerRadius="10"
+                                Visibility="{Binding HasPendingChanges, Converter={StaticResource BooleanToVisibility}}">
+                            <TextBlock Style="{StaticResource CaptionTextBlockStyle}" Text="{x:Static res:Strings.MetadataWillChange}" />
+                        </Border>
+                    </StackPanel>
+                </Grid>
+            </Border>
+        </DataTemplate>
+
+        <!--
+            The editor for whichever row is picked.
+
+            Two versions of this lived inside the row and both failed the same way: the panel was
+            larger than the box it opened in. The third failure was measured rather than argued
+            about — 539 device-independent pixels of editor inside a 347-pixel viewport — which is
+            a deficit no amount of tightening closes, because even a perfect fit leaves the list
+            showing exactly one file.
+
+            So it is a pane instead. It is always the same height, always in the same place, and
+            changing the pick swaps its contents without moving anything else on the page. That
+            also gives the list's selected row a job, which is why the highlight removed from it a
+            change ago is back: it now marks the row this pane is editing rather than following
+            the arrow keys around meaning nothing.
+
+            One scroll region, not two. The fields and the search box fit without scrolling; the
+            results push past the bottom only once a search has returned some, and then the whole
+            pane scrolls rather than a box nested inside it.
+        -->
+        <DataTemplate x:Key="LibraryEditorTemplate" DataType="{x:Type vm:LibraryTrackViewModel}">
+            <Grid>
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="Auto" />
+                    <RowDefinition Height="*" />
+                    <RowDefinition Height="Auto" />
+                </Grid.RowDefinitions>
+
+                <StackPanel Grid.Row="0" Margin="0,0,0,10">
+                    <TextBlock FontWeight="SemiBold"
+                               Text="{Binding Title, Mode=OneWay}"
+                               TextTrimming="CharacterEllipsis"
+                               TextWrapping="NoWrap" />
+
+                    <TextBlock Style="{StaticResource OffstreamHintStyle}"
+                               Text="{Binding FileName, Mode=OneTime}"
+                               TextTrimming="CharacterEllipsis"
+                               TextWrapping="NoWrap"
+                               ToolTip="{Binding Path, Mode=OneTime}" />
+
+                    <Border Margin="0,8,0,0"
+                            BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
+                            BorderThickness="0,1,0,0" />
+                </StackPanel>
+
+                <ScrollViewer Grid.Row="1"
+                              Padding="0,0,12,0"
+                              VerticalScrollBarVisibility="Auto">
+                    <!--
+                        Capped rather than filling the pane. These fields hold a song title, not a
+                        paragraph, and a box eight hundred pixels wide for the word "Renegade"
+                        puts the caret an inch from the label that names it.
+
+                        The cap is a star column with a MaxWidth beside an empty Auto one, not a
+                        MaxWidth on the panel itself. A panel aligned Left is arranged at its
+                        *desired* width, and a Grid's desired width is what its content asked for
+                        — so capping it that way collapsed every star column onto its own text and
+                        left four boxes each sized to the word inside it.
+                    -->
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*" MaxWidth="620" />
+                            <ColumnDefinition Width="Auto" />
+                        </Grid.ColumnDefinitions>
+
+                        <!--
+                            Two columns, not ten stacked boxes. Measured at the shell's minimum
+                            window the pane is 444 DIP wide and its scrolling region 347 DIP tall,
+                            while a field costs 65 DIP of height and reads perfectly well at half
+                            that width — the numeric boxes are 216 DIP and nobody has trouble with
+                            them. Stacked, the ten fields came to 650 DIP and put seven of them
+                            below the fold, where a scroll bar is the only evidence they exist.
+                            Paired, they come to 390 DIP: one row over at the smallest window
+                            Offstream allows, and all of it visible at any size anybody uses.
+
+                            Title and copyright span both columns because neither is a short value
+                            — one is what the row is named after, and the other is a sentence.
+                        -->
+                        <Grid Grid.Column="0">
+                            <Grid.ColumnDefinitions>
+                                <ColumnDefinition Width="*" />
+                                <ColumnDefinition Width="12" />
+                                <ColumnDefinition Width="*" />
+                            </Grid.ColumnDefinitions>
+
+                            <Grid.RowDefinitions>
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                                <RowDefinition Height="Auto" />
+                            </Grid.RowDefinitions>
+
+                            <StackPanel Grid.Row="0" Grid.ColumnSpan="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTitle}" />
+
+                                <TextBox x:Name="TitleBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTitle}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTitle}"
+                                         Text="{Binding Title, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasTitleChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentTitle, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TitleBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="1" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldArtist}" />
+
+                                <TextBox x:Name="ArtistBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldArtist}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldArtist}"
+                                         Text="{Binding Artist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasArtistChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentArtist, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=ArtistBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="1" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldAlbumArtist}" />
+
+                                <TextBox x:Name="AlbumArtistBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataListHint}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldAlbumArtist}"
+                                                                     ToolTip="{x:Static res:Strings.MetadataListHint}"
+                                         Text="{Binding AlbumArtist, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasAlbumArtistChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentAlbumArtist, Mode=OneTime}" />
+                                </TextBlock>
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="2" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldAlbum}" />
+
+                                <TextBox x:Name="AlbumBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldAlbum}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldAlbum}"
+                                         Text="{Binding Album, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasAlbumChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentAlbum, Mode=OneTime}" />
+                                </TextBlock>
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="2" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldGenre}" />
+
+                                <TextBox x:Name="GenresBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataListHint}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldGenre}"
+                                                                     ToolTip="{x:Static res:Strings.MetadataListHint}"
+                                         Text="{Binding Genres, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasGenreChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentGenres, Mode=OneTime}" />
+                                </TextBlock>
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldYear}" />
+
+                                <TextBox x:Name="YearBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldYear}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldYear}"
+                                         Text="{Binding Year, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasYearChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentYear, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=YearBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="3" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldDisc}" />
+
+                                <TextBox x:Name="DiscBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldDisc}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldDisc}"
+                                         Text="{Binding Disc, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasDiscChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentDisc, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=DiscBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="4" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTrackNumber}" />
+
+                                <TextBox x:Name="TrackNumberBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTrackNumber}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTrackNumber}"
+                                         Text="{Binding TrackNumber, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasTrackNumberChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentTrackNumber, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TrackNumberBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="4" Grid.Column="2" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldTrackCount}" />
+
+                                <TextBox x:Name="TrackCountBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldTrackCount}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldTrackCount}"
+                                         Text="{Binding TrackCount, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged, ValidatesOnNotifyDataErrors=True}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasTrackCountChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentTrackCount, Mode=OneTime}" />
+                                </TextBlock>
+
+                                <TextBlock Style="{StaticResource OffstreamValidationMessageStyle}" Text="{Binding ElementName=TrackCountBox, Path=(Validation.Errors)/ErrorContent}" />
+                            </StackPanel>
+
+                            <StackPanel Grid.Row="5" Grid.ColumnSpan="3" Grid.Column="0" Style="{StaticResource MetadataFieldStyle}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldCopyright}" />
+
+                                <TextBox x:Name="CopyrightBox"
+                                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFieldCopyright}"
+                                         AutomationProperties.Name="{x:Static res:Strings.MetadataFieldCopyright}"
+                                         Text="{Binding Copyright, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" />
+
+                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                           TextTrimming="CharacterEllipsis"
+                                           TextWrapping="NoWrap"
+                                           Visibility="{Binding HasCopyrightChange, Converter={StaticResource BooleanToVisibility}}">
+                                    <Run Text="{x:Static res:Strings.MetadataWasLabel}" />
+                                    <Run Text="{Binding CurrentCopyright, Mode=OneTime}" />
+                                </TextBlock>
+                            </StackPanel>
+
+                            <!--
+                                Artwork is the one tag with no box, because a picture is not
+                                something to type. It is still written by Save, so a row can say
+                                "will change" with every field beside it matching the file — and a
+                                badge with no visible cause reads as a bug rather than as
+                                information. Before and after, side by side, is the only way a
+                                changed picture is visible at all.
+                            -->
+                            <StackPanel Grid.Row="6"
+                                        Grid.ColumnSpan="3"
+                                        Grid.Column="0"
+                                        Style="{StaticResource MetadataFieldStyle}"
+                                        Visibility="{Binding HasCoverArtChange, Converter={StaticResource BooleanToVisibility}}">
+                                <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataFieldArtwork}" />
+
+                                <StackPanel Margin="0,8,0,0" Orientation="Horizontal">
+                                    <StackPanel Margin="0,0,14,0">
+                                        <Image Width="44"
+                                               Height="44"
+                                               Source="{Binding ExistingCoverArt, Mode=OneTime}"
+                                               Stretch="UniformToFill" />
+
+                                        <TextBlock Style="{StaticResource MetadataWasStyle}" Text="{x:Static res:Strings.MetadataCoverBefore}" />
+                                    </StackPanel>
+
+                                    <StackPanel>
+                                        <Image Width="44"
+                                               Height="44"
+                                               Source="{Binding SuggestedCoverArtSource, Mode=OneWay}"
+                                               Stretch="UniformToFill" />
+
+                                        <TextBlock Style="{StaticResource MetadataWasStyle}" Text="{x:Static res:Strings.MetadataCoverAfter}" />
+                                    </StackPanel>
+                                </StackPanel>
+                            </StackPanel>
+                        </Grid>
+                    </Grid>
+                </ScrollViewer>
+
+                <!--
+                    The answer to a wrong match, pinned to the bottom of the pane rather than left
+                    to follow the fields down.
+
+                    It needs its own search rather than another Re-fetch because the automatic
+                    lookup builds its query from the file and then rejects any result whose artist
+                    disagrees with it — so the one case it cannot help with is a file whose artist
+                    is wrong, and asking it again returns the same answer. This asks Spotify what
+                    the user typed and shows everything it says.
+
+                    Pinned because the results are the thing the user just asked for. With the
+                    whole pane scrolling as one, ten results appeared below the fold behind a
+                    scroll bar, and the only sign that the search had worked at all was that the
+                    bar got smaller. The fields scroll in the space above instead: they are what
+                    the user is willing to go looking for, having already read them.
+                -->
+                <StackPanel Grid.Row="2">
+                    <Border Margin="0,8,0,10"
+                            BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
+                            BorderThickness="0,1,0,0" />
+
+                    <TextBlock Style="{StaticResource OffstreamFieldLabelStyle}" Text="{x:Static res:Strings.MetadataWrongMatchHeading}" />
+
+                    <!--
+                        Both buttons sit on the line with the box because they are two ways of
+                        asking the same question, and neither is worth a row of its own.
+                    -->
+                    <Grid>
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*" />
+                            <ColumnDefinition Width="Auto" />
+                            <ColumnDefinition Width="Auto" />
+                        </Grid.ColumnDefinitions>
+
+                        <ui:TextBox Grid.Column="0"
+                                    Margin="0,0,8,0"
+                                    VerticalAlignment="Center"
+                                    AutomationProperties.HelpText="{x:Static res:Strings.MetadataSearchHelp}"
+                                    AutomationProperties.Name="{x:Static res:Strings.MetadataSearchLabel}"
+                                    PlaceholderText="{x:Static res:Strings.MetadataSearchLabel}"
+                                    Text="{Binding MatchQuery, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                                    ToolTip="{x:Static res:Strings.MetadataSearchHelp}" />
+
+                        <ui:Button Grid.Column="1"
+                                   Margin="0,0,8,0"
+                                   VerticalAlignment="Center"
+                                   Command="{Binding DataContext.SearchMatchesCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                                   CommandParameter="{Binding}"
+                                   Content="{x:Static res:Strings.MetadataSearchAction}"
+                                   IsEnabled="{Binding IsNotSearching, Mode=OneWay}"
+                                   ToolTip="{x:Static res:Strings.MetadataSearchHelp}" />
+
+                        <ui:Button Grid.Column="2"
+                                   VerticalAlignment="Center"
+                                   AutomationProperties.HelpText="{x:Static res:Strings.MetadataRefetchHelp}"
+                                   Command="{Binding DataContext.RefetchCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                                   CommandParameter="{Binding}"
+                                   Content="{x:Static res:Strings.MetadataRefetch}"
+                                   ToolTip="{x:Static res:Strings.MetadataRefetchHelp}" />
+                    </Grid>
+
+                    <TextBlock Margin="0,6,0,0"
+                               AutomationProperties.LiveSetting="Polite"
+                               Style="{StaticResource MetadataWasStyle}"
+                               Text="{x:Static res:Strings.MetadataSearching}"
+                               Visibility="{Binding IsSearching, Converter={StaticResource BooleanToVisibility}}" />
+
+                    <TextBlock Margin="0,6,0,0"
+                               AutomationProperties.LiveSetting="Polite"
+                               Style="{StaticResource MetadataWasStyle}"
+                               Text="{Binding SearchMessage, Mode=OneWay}"
+                               TextWrapping="Wrap" />
+
+                    <!--
+                        Capped and scrollable. Ten results is a normal answer from Spotify and
+                        they cannot all be shown — but the cap is on the box, not on the search:
+                        the whole point of this list is that the user sees what Spotify actually
+                        returned rather than the one answer the matcher liked.
+                    -->
+                    <ScrollViewer MaxHeight="132"
+                                  Margin="0,8,0,0"
+                                  Padding="0,0,12,0"
+                                  VerticalScrollBarVisibility="Auto"
+                                  Visibility="{Binding HasCandidates, Converter={StaticResource BooleanToVisibility}}">
+                        <ItemsControl ItemsSource="{Binding Candidates, Mode=OneWay}">
+                            <ItemsControl.ItemTemplate>
+                                <DataTemplate DataType="{x:Type vm:LibraryMatchViewModel}">
+                                    <Border Margin="0,0,0,6"
+                                            Padding="10,7"
+                                            Background="{StaticResource OffstreamSurfaceBrush}"
+                                            CornerRadius="6">
+                                        <Grid>
+                                            <Grid.ColumnDefinitions>
+                                                <ColumnDefinition Width="*" />
+                                                <ColumnDefinition Width="Auto" />
+                                            </Grid.ColumnDefinitions>
+
+                                            <StackPanel Grid.Column="0"
+                                                        Margin="0,0,10,0"
+                                                        VerticalAlignment="Center">
+                                                <TextBlock Text="{Binding Title, Mode=OneTime}"
+                                                           TextTrimming="CharacterEllipsis"
+                                                           TextWrapping="NoWrap" />
+
+                                                <TextBlock Style="{StaticResource MetadataWasStyle}"
+                                                           Text="{Binding Summary, Mode=OneTime}"
+                                                           TextTrimming="CharacterEllipsis"
+                                                           TextWrapping="NoWrap" />
+                                            </StackPanel>
+
+                                            <ui:Button Grid.Column="1"
+                                                       VerticalAlignment="Center"
+                                                       AutomationProperties.HelpText="{x:Static res:Strings.MetadataUseMatchHelp}"
+                                                       Command="{Binding DataContext.UseMatchCommand, RelativeSource={RelativeSource AncestorType=UserControl}}"
+                                                       CommandParameter="{Binding}"
+                                                       Content="{x:Static res:Strings.MetadataUseMatch}"
+                                                       ToolTip="{x:Static res:Strings.MetadataUseMatchHelp}" />
+                                        </Grid>
+                                    </Border>
+                                </DataTemplate>
+                            </ItemsControl.ItemTemplate>
+                        </ItemsControl>
+                    </ScrollViewer>
+                </StackPanel>
+            </Grid>
+        </DataTemplate>
+    </UserControl.Resources>
+
+    <!--
+        Repairing tags on files that already exist.
+
+        The page is three steps in one direction and only the last one writes: scan reads, fetch
+        proposes, save commits. Keeping them as three buttons rather than one "fix my library"
+        action is deliberate — an automatic match is wrong often enough that the review step is
+        the feature, not friction in front of it.
+
+        Below the buttons it is a list beside an editor. That split is what makes the review step
+        usable: the library stays on screen while one of its files is being corrected, and the
+        pane holding the correction never changes size or position as the pick moves through it.
+    -->
+    <Border Padding="12" Style="{StaticResource OffstreamCardStyle}">
+        <Grid>
+            <Grid.RowDefinitions>
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="Auto" />
+                <RowDefinition Height="*" />
+            </Grid.RowDefinitions>
+
+            <!--
+                What the page is for is a tooltip on its heading rather than a paragraph under it,
+                the same trade the Advanced page makes for its settings: a line of prose costs
+                every row below it a share of a window that has none to give, and this one cost
+                the list forty pixels it needed more.
+            -->
+            <ContentControl Grid.Row="0"
+                            Content="{x:Static res:Strings.MetadataHeading}"
+                            Style="{StaticResource OffstreamGroupHeaderStyle}"
+                            ToolTip="{x:Static res:Strings.MetadataIntro}" />
+
+            <Grid Grid.Row="1" Margin="0,0,0,10">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="*" />
+                    <ColumnDefinition Width="Auto" />
+                </Grid.ColumnDefinitions>
+
+                <TextBlock Grid.Column="0"
+                           Margin="0,0,8,0"
+                           VerticalAlignment="Center"
+                           Style="{StaticResource OffstreamFieldLabelStyle}"
+                           Text="{x:Static res:Strings.MetadataFolderLabel}" />
+
+                <TextBox Grid.Column="1"
+                         Margin="0,0,8,0"
+                         VerticalAlignment="Center"
+                         AutomationProperties.AutomationId="MetadataFolder"
+                         AutomationProperties.HelpText="{x:Static res:Strings.MetadataFolderHelp}"
+                         AutomationProperties.Name="{x:Static res:Strings.MetadataFolderLabel}"
+                         Text="{Binding Folder, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                         ToolTip="{x:Static res:Strings.MetadataFolderHelp}" />
+
+                <ui:Button Grid.Column="2"
+                           AutomationProperties.AutomationId="MetadataBrowse"
+                           Command="{Binding BrowseCommand}"
+                           Content="{x:Static res:Strings.MetadataBrowse}"
+                           IsEnabled="{Binding IsIdle, Mode=OneWay}" />
+            </Grid>
+
+            <Grid Grid.Row="2" Margin="0,0,0,10">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="Auto" />
+                    <ColumnDefinition Width="*" />
+                </Grid.ColumnDefinitions>
+
+                <StackPanel Grid.Column="0" Orientation="Horizontal">
+                    <ui:Button Margin="0,0,8,0"
+                               AutomationProperties.AutomationId="MetadataScan"
+                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataScanHelp}"
+                               Command="{Binding ScanCommand}"
+                               Content="{x:Static res:Strings.MetadataScan}"
+                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
+                               ToolTip="{x:Static res:Strings.MetadataScanHelp}" />
+
+                    <ui:Button Margin="0,0,8,0"
+                               AutomationProperties.AutomationId="MetadataAutoFetch"
+                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataAutoFetchHelp}"
+                               Command="{Binding AutoFetchCommand}"
+                               Content="{x:Static res:Strings.MetadataAutoFetch}"
+                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
+                               ToolTip="{x:Static res:Strings.MetadataAutoFetchHelp}" />
+
+                    <ui:Button Appearance="Primary"
+                               AutomationProperties.AutomationId="MetadataSaveSelected"
+                               AutomationProperties.HelpText="{x:Static res:Strings.MetadataSaveHelp}"
+                               Command="{Binding SaveSelectedCommand}"
+                               Content="{x:Static res:Strings.MetadataSaveSelected}"
+                               IsEnabled="{Binding IsIdle, Mode=OneWay}"
+                               ToolTip="{x:Static res:Strings.MetadataSaveHelp}" />
+                </StackPanel>
+
+                <TextBlock Grid.Column="1"
+                           Margin="12,0,0,0"
+                           VerticalAlignment="Center"
+                           AutomationProperties.LiveSetting="Polite"
+                           Style="{StaticResource OffstreamHintStyle}"
+                           Text="{Binding StatusMessage, Mode=OneWay}"
+                           TextTrimming="CharacterEllipsis" />
+            </Grid>
+
+            <Grid Grid.Row="3">
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="*" MinWidth="300" />
+                    <ColumnDefinition Width="12" />
+                    <ColumnDefinition Width="1.1*" MinWidth="340" />
+                </Grid.ColumnDefinitions>
+
+                <Grid Grid.Column="0">
+                    <Grid.RowDefinitions>
+                        <RowDefinition Height="Auto" />
+                        <RowDefinition Height="*" />
+                    </Grid.RowDefinitions>
+
+                    <!--
+                        The filter narrows what is drawn and nothing else. It sits over the list
+                        rather than beside the buttons because it belongs to the list: the buttons
+                        act on the whole library whatever is typed here, and putting it in their
+                        row would suggest otherwise.
+                    -->
+                    <Grid Grid.Row="0"
+                          Margin="0,0,0,8"
+                          Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}">
+                        <Grid.ColumnDefinitions>
+                            <ColumnDefinition Width="*" />
+                            <ColumnDefinition Width="Auto" />
+                        </Grid.ColumnDefinitions>
+
+                        <ui:TextBox Grid.Column="0"
+                                    VerticalAlignment="Center"
+                                    AutomationProperties.AutomationId="MetadataFilter"
+                                    AutomationProperties.HelpText="{x:Static res:Strings.MetadataFilterHelp}"
+                                    AutomationProperties.Name="{x:Static res:Strings.MetadataFilterLabel}"
+                                    PlaceholderText="{x:Static res:Strings.MetadataFilterPlaceholder}"
+                                    Text="{Binding Filter, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"
+                                    ToolTip="{x:Static res:Strings.MetadataFilterHelp}" />
+
+                        <TextBlock Grid.Column="1"
+                                   Margin="10,0,0,0"
+                                   VerticalAlignment="Center"
+                                   AutomationProperties.LiveSetting="Polite"
+                                   Style="{StaticResource OffstreamHintStyle}"
+                                   Text="{Binding FilterSummary, Mode=OneWay}"
+                                   Visibility="{Binding IsFiltered, Converter={StaticResource BooleanToVisibility}}" />
+                    </Grid>
+
+                    <TextBlock Grid.Row="1"
+                               Margin="4,12,0,0"
+                               VerticalAlignment="Top"
+                               Text="{x:Static res:Strings.MetadataEmpty}"
+                               TextWrapping="Wrap">
+                        <TextBlock.Style>
+                            <Style BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
+                                <Setter Property="Visibility" Value="Visible" />
+                                <Style.Triggers>
+                                    <DataTrigger Binding="{Binding HasTracks, Mode=OneWay}" Value="True">
+                                        <Setter Property="Visibility" Value="Collapsed" />
+                                    </DataTrigger>
+                                </Style.Triggers>
+                            </Style>
+                        </TextBlock.Style>
+                    </TextBlock>
+
+                    <TextBlock Grid.Row="1"
+                               Margin="4,12,0,0"
+                               VerticalAlignment="Top"
+                               AutomationProperties.LiveSetting="Polite"
+                               Style="{StaticResource OffstreamHintStyle}"
+                               Text="{x:Static res:Strings.MetadataNoMatches}"
+                               TextWrapping="Wrap"
+                               Visibility="{Binding HasNoMatches, Converter={StaticResource BooleanToVisibility}}" />
+
+                    <!--
+                        Virtualised: a music folder is thousands of files, and each row carries a
+                        decoded thumbnail. Without recycling, scanning a real library builds every
+                        one of them up front and the page stops responding before it finishes
+                        drawing.
+
+                        Horizontal scrolling is disabled rather than automatic, which is what
+                        forces the rows to be measured at the width actually available. See the
+                        row template.
+
+                        Scrolling is by pixel, not by item. A row here is a three-line block, so
+                        the default — three *items* per wheel notch — moved the list most of a
+                        screen at a time and made it unusable with a mouse.
+                    -->
+                    <ListBox Grid.Row="1"
+                             AutomationProperties.AutomationId="MetadataTrackList"
+                             Background="Transparent"
+                             BorderThickness="0"
+                             ItemTemplate="{StaticResource LibraryTrackTemplate}"
+                             ItemsSource="{Binding VisibleTracks, Mode=OneWay}"
+                             ScrollViewer.HorizontalScrollBarVisibility="Disabled"
+                             SelectedItem="{Binding SelectedTrack, Mode=TwoWay}"
+                             Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}"
+                             VirtualizingPanel.IsVirtualizing="True"
+                             VirtualizingPanel.ScrollUnit="Pixel"
+                             VirtualizingPanel.VirtualizationMode="Recycling">
+                        <!--
+                            The selected row is marked, but quietly. The themed container paints a
+                            saturated fill and an accent bar down the side, which on a list of
+                            three-line rows reads as an alarm rather than a pointer — and it was
+                            worse than useless while nothing acted on the selection at all. Now
+                            the pane on the right is what the selection means, so the row needs to
+                            say which one it is showing: a tinted background and a narrow accent
+                            edge, and no change to the text.
+
+                            The template is replaced rather than the brushes overridden, because
+                            setting the brushes leaves the themed accent bar in place underneath.
+                        -->
+                        <ListBox.ItemContainerStyle>
+                            <Style TargetType="ListBoxItem">
+                                <Setter Property="HorizontalContentAlignment" Value="Stretch" />
+                                <Setter Property="Padding" Value="0" />
+                                <Setter Property="Background" Value="Transparent" />
+                                <Setter Property="BorderThickness" Value="0" />
+                                <Setter Property="Template">
+                                    <Setter.Value>
+                                        <ControlTemplate TargetType="ListBoxItem">
+                                            <Border x:Name="Pick"
+                                                    Background="Transparent"
+                                                    BorderBrush="Transparent"
+                                                    BorderThickness="3,0,0,0">
+                                                <ContentPresenter HorizontalAlignment="Stretch" />
+                                            </Border>
+
+                                            <ControlTemplate.Triggers>
+                                                <Trigger Property="IsSelected" Value="True">
+                                                    <Setter TargetName="Pick" Property="Background" Value="{DynamicResource ControlFillColorSecondaryBrush}" />
+                                                    <Setter TargetName="Pick" Property="BorderBrush" Value="{StaticResource OffstreamAccentBrush}" />
+                                                </Trigger>
+                                            </ControlTemplate.Triggers>
+                                        </ControlTemplate>
+                                    </Setter.Value>
+                                </Setter>
+                            </Style>
+                        </ListBox.ItemContainerStyle>
+                    </ListBox>
+                </Grid>
+
+                <Border Grid.Column="2"
+                        Padding="16,14"
+                        Background="{StaticResource OffstreamWellBrush}"
+                        BorderBrush="{StaticResource OffstreamRowSeparatorBrush}"
+                        BorderThickness="1"
+                        CornerRadius="8"
+                        Visibility="{Binding HasTracks, Converter={StaticResource BooleanToVisibility}}">
+                    <Grid>
+                        <TextBlock VerticalAlignment="Top"
+                                   Text="{x:Static res:Strings.MetadataNoSelection}"
+                                   TextWrapping="Wrap">
+                            <TextBlock.Style>
+                                <Style BasedOn="{StaticResource OffstreamHintStyle}" TargetType="TextBlock">
+                                    <Setter Property="Visibility" Value="Visible" />
+                                    <Style.Triggers>
+                                        <DataTrigger Binding="{Binding HasSelection, Mode=OneWay}" Value="True">
+                                            <Setter Property="Visibility" Value="Collapsed" />
+                                        </DataTrigger>
+                                    </Style.Triggers>
+                                </Style>
+                            </TextBlock.Style>
+                        </TextBlock>
+
+                        <ContentControl HorizontalContentAlignment="Stretch"
+                                        VerticalContentAlignment="Stretch"
+                                        AutomationProperties.AutomationId="MetadataEditor"
+                                        AutomationProperties.Name="{x:Static res:Strings.MetadataEditorHeading}"
+                                        Content="{Binding SelectedTrack, Mode=OneWay}"
+                                        ContentTemplate="{StaticResource LibraryEditorTemplate}"
+                                        Visibility="{Binding HasSelection, Converter={StaticResource BooleanToVisibility}}" />
+                    </Grid>
+                </Border>
+            </Grid>
+        </Grid>
+    </Border>
+
+</UserControl>