diff --git a/src/Marathon.Hosts.WpfBlazor/App.xaml.cs b/src/Marathon.Hosts.WpfBlazor/App.xaml.cs
index ea8e92e..336f257 100644
--- a/src/Marathon.Hosts.WpfBlazor/App.xaml.cs
+++ b/src/Marathon.Hosts.WpfBlazor/App.xaml.cs
@@ -83,6 +83,17 @@ public partial class App : System.Windows.Application
         builder.Services.AddSingleton<MainWindow>();
 
         Host = builder.Build();
+
+        // Apply EF migrations + WAL pragma BEFORE Host.Start() so the BackgroundServices
+        // (LiveOddsPoller, AnomalyDetectionPoller, etc.) don't race the DB schema creation.
+        // Resolved in a scope because MarathonDbContextInitializer is Scoped (DbContext lifetime).
+        using (var initScope = Host.Services.CreateScope())
+        {
+            var initializer = initScope.ServiceProvider
+                .GetRequiredService<Marathon.Infrastructure.Persistence.MarathonDbContextInitializer>();
+            initializer.InitializeAsync().GetAwaiter().GetResult();
+        }
+
         Host.Start();
 
         // Apply default culture from configuration before any UI renders.
diff --git a/src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs b/src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs
index 53cfa6d..19cafbc 100644
--- a/src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs
+++ b/src/Marathon.Infrastructure/Migrations/20260505000000_InitialCreate.cs
@@ -1,3 +1,5 @@
+using Marathon.Infrastructure.Persistence;
+using Microsoft.EntityFrameworkCore.Infrastructure;
 using Microsoft.EntityFrameworkCore.Migrations;
 
 #nullable disable
@@ -5,6 +7,8 @@ using Microsoft.EntityFrameworkCore.Migrations;
 namespace Marathon.Infrastructure.Migrations;
 
 /// <inheritdoc />
+[DbContext(typeof(MarathonDbContext))]
+[Migration("20260505000000_InitialCreate")]
 public partial class InitialCreate : Migration
 {
     /// <inheritdoc />
diff --git a/src/Marathon.UI/wwwroot/index.html b/src/Marathon.UI/wwwroot/index.html
index e24adff..fd229df 100644
--- a/src/Marathon.UI/wwwroot/index.html
+++ b/src/Marathon.UI/wwwroot/index.html
@@ -38,6 +38,9 @@
         <a class="dismiss" style="float: right; cursor: pointer; padding: 0 8px;">×</a>
     </div>
 
+    <!-- Plotly.js for OddsTimeline charts (Phase 6). Pinned major version 2.x. -->
+    <script src="https://cdn.plot.ly/plotly-2.35.2.min.js" charset="utf-8"></script>
+
     <script src="_framework/blazor.webview.js" autostart="false"></script>
     <script src="_content/MudBlazor/MudBlazor.min.js"></script>
 </body>