refactor(ui): Icon-Faerbung zentral im ICON-PAINTING-Block

Inline Foreground/Stroke an Icons entfernt — ein lokaler Wert schlaegt jeden
Style, dadurch erreichten Hover/Checked/Disabled das Icon nicht. Farbe wird
jetzt per Klasse gewaehlt (.danger, .star-btn.on, .active), alle Zustaende
liegen in einem geordneten Block in IslandStyles.axaml.

- Path.plan-icon -> Path.icon-stroke (gilt jetzt fuer Button und ToggleButton)
- Icon.Activity als gefuellte Kontur (PathIcon fuellt, Stroke-Polyline gab Blobs)
- BloodBrightBrush als Hover-Ton fuer destruktive Icons
- icon-btn:disabled bleibt transparent statt Fluent-Grau

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

@@ -33,10 +33,8 @@
                   IsVisible="{Binding Task.HasBranch, FallbackValue=False}">
         <!-- Icon.GitBranch is line-art: stroke-rendered, PathIcon would fill the lines away -->
         <Viewbox Width="10" Height="10">
-          <Path Data="{StaticResource Icon.GitBranch}"
-                Stroke="{DynamicResource TextDimBrush}"
-                StrokeThickness="2.4"
-                StrokeLineCap="Round" StrokeJoin="Round"/>
+          <Path Classes="icon-stroke" Data="{StaticResource Icon.GitBranch}"
+                StrokeThickness="2.4"/>
         </Viewbox>
         <TextBlock Classes="meta" Text="{Binding Task.Branch}"/>
       </StackPanel>
@@ -46,11 +44,11 @@
     <Button Grid.Column="1" Classes="icon-btn"
             Command="{Binding DeleteTaskCommand}"
             ToolTip.Tip="{loc:Tr details.deleteTaskTip}"
+            ToolTip.ShowOnDisabled="True"
             IsVisible="{Binding !IsRunning}"
             VerticalAlignment="Top"
             Margin="6,0,0,0">
-      <PathIcon Data="{StaticResource Icon.Trash}" Width="14" Height="14"
-                Foreground="{DynamicResource BloodBrush}"/>
+      <PathIcon Classes="danger" Data="{StaticResource Icon.Trash}" Width="14" Height="14"/>
     </Button>
 
     <!-- Column 1: skull button (running) -->
@@ -60,8 +58,7 @@
             IsVisible="{Binding IsRunning}"
             VerticalAlignment="Top"
             Margin="6,0,0,0">
-      <PathIcon Data="{StaticResource Icon.Skull}" Width="14" Height="14"
-                Foreground="{DynamicResource BloodBrush}"/>
+      <PathIcon Classes="danger" Data="{StaticResource Icon.Skull}" Width="14" Height="14"/>
     </Button>
 
     <!-- Column 2: gear button with agent settings flyout -->

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

@@ -71,9 +71,7 @@
         <Button Grid.Column="2" Classes="icon-btn" VerticalAlignment="Center"
                 Command="{Binding OpenSettingsCommand}"
                 ToolTip.Tip="{loc:Tr lists.settingsTip}">
-          <PathIcon Data="{StaticResource Icon.Settings}"
-                    Width="15" Height="15"
-                    Foreground="{DynamicResource TextMuteBrush}"/>
+          <PathIcon Data="{StaticResource Icon.Settings}" Width="15" Height="15"/>
         </Button>
       </Grid>
     </Border>
@@ -207,20 +205,16 @@
             <StackPanel Orientation="Horizontal" Spacing="6">
               <PathIcon Data="{StaticResource Icon.Plus}"
                         Width="13" Height="13"
-                        Foreground="{DynamicResource TextMuteBrush}"
                         VerticalAlignment="Center"/>
               <TextBlock Classes="body"
                          Text="{loc:Tr lists.newList}"
-                         Foreground="{DynamicResource TextMuteBrush}"
                          VerticalAlignment="Center"/>
             </StackPanel>
           </Button>
           <Button Grid.Column="1" Classes="icon-btn" Margin="6,0,0,0"
                   Command="{Binding OpenRepoImportCommand}"
                   ToolTip.Tip="{loc:Tr lists.addReposTip}">
-            <PathIcon Data="{StaticResource Icon.Folder}"
-                      Width="14" Height="14"
-                      Foreground="{DynamicResource TextMuteBrush}"/>
+            <PathIcon Data="{StaticResource Icon.Folder}" Width="14" Height="14"/>
           </Button>
         </Grid>
 

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

@@ -58,9 +58,9 @@
                 ToolTip.Tip="{loc:Tr tasks.toggleSubtasksTip}">
           <Panel>
             <PathIcon Width="12" Height="12" Data="{StaticResource Icon.ChevronDown}"
-                      Foreground="{DynamicResource TextDimBrush}" IsVisible="{Binding IsExpanded}"/>
+                      IsVisible="{Binding IsExpanded}"/>
             <PathIcon Width="12" Height="12" Data="{StaticResource Icon.ChevronRight}"
-                      Foreground="{DynamicResource TextDimBrush}" IsVisible="{Binding !IsExpanded}"/>
+                      IsVisible="{Binding !IsExpanded}"/>
           </Panel>
         </Button>
 
@@ -213,7 +213,7 @@
               </MultiBinding>
             </Button.IsVisible>
             <Viewbox Width="16" Height="16">
-              <Path Classes="plan-icon" Data="{StaticResource Icon.Refine}"/>
+              <Path Classes="icon-stroke" Data="{StaticResource Icon.Refine}"/>
             </Viewbox>
           </Button>
           <Ellipse Classes="spinner"

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

@@ -43,7 +43,7 @@
                   Command="{Binding MergeReviewsCommand}" ToolTip.Tip="{loc:Tr tasks.mergeReviewsTip}">
             <!-- Icon.GitBranch is line-art: stroke-rendered, PathIcon would fill the lines away -->
             <Viewbox Width="16" Height="16">
-              <Path Classes="plan-icon" Data="{StaticResource Icon.GitBranch}"/>
+              <Path Classes="icon-stroke" Data="{StaticResource Icon.GitBranch}"/>
             </Viewbox>
           </Button>
           <Button Classes="icon-btn" IsVisible="{Binding IsQuickClaudeVisible}"
@@ -57,7 +57,7 @@
           <Button Classes="icon-btn" IsVisible="{Binding IsMyDayList}"
                   Command="{Binding ShowPrepLogCommand}" ToolTip.Tip="{loc:Tr tasks.planMyDayTip}">
             <Viewbox Width="18" Height="18">
-              <Path Classes="plan-icon" Data="{StaticResource Icon.PlanDay}"/>
+              <Path Classes="icon-stroke" Data="{StaticResource Icon.PlanDay}"/>
             </Viewbox>
           </Button>
           <Button Classes="icon-btn" Command="{Binding OpenListSettingsCommand}" ToolTip.Tip="{loc:Tr tasks.listSettingsTip}">
@@ -144,8 +144,7 @@
                       Command="{Binding ActionCommand}"
                       ToolTip.Tip="{loc:Tr tasks.clearCompletedTip}"
                       VerticalAlignment="Center">
-                <PathIcon Data="{StaticResource Icon.Trash}" Width="13" Height="13"
-                          Foreground="{DynamicResource BloodBrush}"/>
+                <PathIcon Classes="danger" Data="{StaticResource Icon.Trash}" Width="13" Height="13"/>
               </Button>
             </Grid>
           </DataTemplate>

src/ClaudeDo.Ui/Views/MissionControl/MissionControlView.axaml

@@ -35,20 +35,17 @@
           <Button Classes="icon-btn"
                   Click="OnNewSessionClicked"
                   ToolTip.Tip="{loc:Tr missionControl.newSession}">
-            <PathIcon Data="{StaticResource Icon.Plus}" Width="15" Height="15"
-                      Foreground="{DynamicResource TextMuteBrush}"/>
+            <PathIcon Data="{StaticResource Icon.Plus}" Width="15" Height="15"/>
           </Button>
           <Button Classes="icon-btn"
                   Command="{Binding ToggleLayoutCommand}"
                   ToolTip.Tip="{Binding LayoutToggleLabel}">
-            <PathIcon Data="{StaticResource Icon.Grid}" Width="15" Height="15"
-                      Foreground="{DynamicResource TextMuteBrush}"/>
+            <PathIcon Data="{StaticResource Icon.Grid}" Width="15" Height="15"/>
           </Button>
           <Button Classes="icon-btn"
                   Command="{Binding OpenSettingsCommand}"
                   ToolTip.Tip="{loc:Tr missionControl.settings}">
-            <PathIcon Data="{StaticResource Icon.Settings}" Width="15" Height="15"
-                      Foreground="{DynamicResource TextMuteBrush}"/>
+            <PathIcon Data="{StaticResource Icon.Settings}" Width="15" Height="15"/>
           </Button>
         </StackPanel>
       </Grid>