feat: redesign dashboard with Fluent KPI tiles, connection strip, and devices column

- Replace LCD-style readings with a 3×2 KPI tile grid (Fluent card surfaces, 52pt values)
- Add persistent top connection strip with horizontal chips + pump name badge
- Add elapsed test timer (DispatcherTimer, mm:ss) to Test Summary card
- Restyle Test Summary and Active Alarms with Fluent brushes/iconography
- Add Devices column (CAN / K-Line / Bench tiles) between KPI grid and test/alarms
  - Enumerates attached PCAN USB channels via PCAN_ATTACHED_CHANNELS API
  - Enumerates FTDI K-Line adapters via existing FtdiInterface helpers
  - Click to connect/disconnect; confirmation dialog when session active or test running
  - Hover tint: blue = will connect, red = will disconnect; Bench row is read-only stub
- Extend ICanService with SelectedChannel + EnumerateAttachedChannels()
- Expose IKwpService.ConnectedPort for active session device tracking
- Add DeviceRow button style with MultiDataTrigger hover colour logic
- Add 30+ new localization keys (ES + EN) for KPI labels, devices, confirmations

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

HC_APTBS.csproj

@@ -40,7 +40,8 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="9.0.5" />
     <PackageReference Include="System.IO.Ports" Version="10.0.5" />
-    <PackageReference Include="ToggleSwitch" Version="1.2.0" />
+    <!-- WPF-UI: FluentWindow chrome + unified control theming -->
+    <PackageReference Include="WPF-UI" Version="3.0.5" />
   </ItemGroup>
 
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