mbproxy: replace status page with a live SignalR web dashboard

The single auto-refreshing zero-JS status page gave operators a 25-column
wall and no way to drill into one connection. This adds a Bootstrap fleet
dashboard (filterable/sortable KPI table) and a per-PLC detail page with a
real-time debug view of raw PLC-side BCD vs. decoded client-side values,
streamed live over a SignalR feed. The debug view is fed by an on-demand
per-tag value capture, armed only while a detail page is open. All assets
(Bootstrap, SignalR client, fonts) are embedded so the UI works unchanged
on firewalled networks; GET /status.json is untouched for scrapers.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

mbproxy/src/Mbproxy/Mbproxy.csproj

@@ -58,6 +58,16 @@
     <InternalsVisibleTo Include="Mbproxy.Tests" />
   </ItemGroup>
 
+  <ItemGroup>
+    <!-- Admin web-UI assets — Bootstrap, the SignalR JS client, vendored fonts, and the
+         dashboard's own HTML/CSS/JS. Embedded into the assembly so the single-file binary
+         serves the whole UI with no CDN dependency (firewalled networks). Resource names
+         are Mbproxy.Admin.wwwroot.<filename>; AdminEndpointHost streams them on
+         GET /assets/<filename>. The directory is intentionally flat to keep the
+         resource-name → request-path mapping trivial. -->
+    <EmbeddedResource Include="Admin\wwwroot\*.*" />
+  </ItemGroup>
+
   <!-- Link the platform-appropriate install template as the published appsettings.json so
        the binary ships with a fully-commented, usable example config (PLCs, BCD tags, all
        sections present) instead of an empty stub. The .NET configuration loader supports