feat(ui): Settings-Tab fuer die Ticketsystem-Anbindung

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

@@ -690,6 +690,45 @@
           </ScrollViewer>
         </TabItem>
 
+        <!-- Ticketsystem: Base-URL + PAT for the Bandel ticket integration. Empty base URL
+             disables the feature entirely, so this tab intentionally never forces a value. -->
+        <TabItem Header="{loc:Tr settings.sidebar.categoryTickets}">
+          <ScrollViewer>
+            <StackPanel Spacing="14" Margin="0,8,0,0">
+
+              <StackPanel Spacing="4">
+                <TextBlock Classes="field-label" Text="{loc:Tr settings.tickets.baseUrl}"/>
+                <TextBox Text="{Binding Tickets.ApiBaseUrl, Mode=TwoWay}"/>
+                <TextBlock Classes="meta" Text="{loc:Tr settings.tickets.baseUrlHint}"
+                           TextWrapping="Wrap" Opacity="0.6"/>
+              </StackPanel>
+
+              <Border BorderBrush="{DynamicResource LineBrush}" BorderThickness="0,1,0,0" Margin="0,2,0,0"/>
+
+              <StackPanel Spacing="4">
+                <TextBlock Classes="field-label" Text="{loc:Tr settings.tickets.token}"/>
+                <TextBox Text="{Binding Tickets.Token, Mode=TwoWay}"
+                         PasswordChar="•"
+                         PlaceholderText="{Binding Tickets.TokenPlaceholder}"/>
+              </StackPanel>
+
+              <StackPanel Orientation="Horizontal" Spacing="8">
+                <Button Classes="btn"
+                        Content="{loc:Tr settings.tickets.testConnection}"
+                        Command="{Binding Tickets.TestConnectionCommand}"
+                        IsEnabled="{Binding !Tickets.IsBusy}"/>
+                <Button Classes="btn danger"
+                        Content="{loc:Tr settings.tickets.clearToken}"
+                        Command="{Binding Tickets.ClearTokenCommand}"
+                        IsEnabled="{Binding !Tickets.IsBusy}"/>
+              </StackPanel>
+
+              <TextBlock Classes="meta" Text="{Binding Tickets.StatusMessage}"
+                         IsVisible="{Binding Tickets.StatusMessage, Converter={x:Static StringConverters.IsNotNullOrEmpty}}"/>
+            </StackPanel>
+          </ScrollViewer>
+        </TabItem>
+
         </TabControl>
       </Grid>
     </DockPanel>