Blazor port — Phase 5: MAUI BlazorWebView host (reuse web UI in mobile/desktop)

[StepKie]

Phase 5 of the Blazor port. Depends on #7. Begin only after the web version is live and stable.

Goal

Stand up a MAUI app that hosts the same Razor components from FantasyFootball.Shared via BlazorWebView. Goal: one UI codebase, two hosts. Run alongside the existing MAUI XAML app until proven, then retire the XAML app.

Approach

Following the .NET 10 maui-blazor-web template structure:

• New project src/FantasyFootball.UI.Hybrid/ — MAUI app, thin MainPage.xaml hosting <BlazorWebView> rooted at Shared.Routes.
• DI: registers MAUI-flavored implementations of any Shared platform-abstraction interfaces (e.g., file picker, secure storage).
• SQLite Repository continues to be the MAUI-side persistence (Blazor Shared components use whichever IRepository is registered).

Tasks

• Create src/FantasyFootball.UI.Hybrid/FantasyFootball.UI.Hybrid.csproj from dotnet new maui-blazor template
• Reference FantasyFootball.Shared and FantasyFootball core
• Strip generated example pages (Counter.razor, Weather.razor) — we use Shared's routes
• MauiProgram.cs: register MAUI-side service implementations, including SQLite Repository for IRepository
• Verify all targets build (net10.0-android, net10.0-windows10.0.19041.0, ideally net10.0-ios)
• Smoke test on Windows: app launches, navigation works, simulation runs, data persists via SQLite
• Smoke test on Android emulator
• Decision point: retire src/FantasyFootball.UI/ (XAML) — separate follow-up issue

Out of scope

Removing the existing XAML FantasyFootball.UI project (deferred to a follow-up once Hybrid is proven on all targets).

Acceptance

• Hybrid app launches on Windows and Android.
• All pages from the web build render identically inside BlazorWebView.
• Persistence uses SQLite (not LocalStorage) — data shared with the existing XAML app if both run on the same device.

[StepKie]

Paused (2026-05-24). Focus shifts to extending the Blazor web app — current Elo data, venues, players data model, more leagues including club competitions — rather than reusing the UI in MAUI for now. The MAUI shell still builds (Teams + Settings only, post-#49 gut). Will revisit once the web extension surface stabilizes.