Add admin Vite app to Aspire AppHost

Registers the Vue admin as an Aspire resource via AddViteApp, wired to
the API so Aspire injects service discovery env vars that the existing
Vite proxy config already reads.

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

src/MicCheck.AppHost/AppHost.cs

@@ -4,6 +4,11 @@ var postgres = builder.AddPostgres("postgres").WithDataVolume("miccheck-pgdata")
 
 var miccheckDb = postgres.AddDatabase("miccheck");
 
-builder.AddProject<Projects.MicCheck_Api>("api").WithReference(miccheckDb).WaitFor(miccheckDb);
+var api = builder.AddProject<Projects.MicCheck_Api>("api").WithReference(miccheckDb).WaitFor(miccheckDb);
+
+builder.AddViteApp("admin", "../admin", "serve")
+    .WithReference(api)
+    .WaitFor(api)
+    .WithExternalHttpEndpoints();
 
 builder.Build().Run();

src/MicCheck.AppHost/MicCheck.AppHost.csproj

@@ -2,6 +2,7 @@
 
   <ItemGroup>
     <ProjectReference Include="..\api\MicCheck.Api\MicCheck.Api.csproj" />
+    <ProjectReference Include="..\admin\Admin.esproj" />
   </ItemGroup>
 
   <ItemGroup>

src/MicCheck.AppHost/appsettings.Development.json

@@ -4,5 +4,13 @@
       "Default": "Information",
       "Microsoft.AspNetCore": "Warning"
     }
+  },
+  "Dashboard": {
+    "Frontend": {
+      "AuthMode": "Unsecured"
+    },
+    "Otlp": {
+      "AuthMode": "Unsecured"
+    }
   }
 }