TodoApp.Uno: MT7156 duplicate BundleResource icon/splash assets ignored on ios-maccatalyst

[adrianhall]

Summary

The ios-maccatalyst head emits several MT7156 warnings about duplicate bundle resources during build:

warning MT7156: The BundleResource item 'obj/Debug/net10.0-ios/iossimulator-arm64/unoresizetizer/r/Assets/Icons/icon_foreground.png' was ignored, because there's another item with the same LogicalName ('Assets/Icons/icon_foreground.png')
warning MT7156: The BundleResource item '.../unoresizetizer/r/Assets/Icons/icon_foreground.scale-100.png' was ignored, because there's another item with the same LogicalName ('Assets/Icons/icon_foreground.png')
warning MT7156: The BundleResource item '.../unoresizetizer/r/Assets/Images/back.png' was ignored, because there's another item with the same LogicalName ('Assets/Images/back.png')
warning MT7156: The BundleResource item '.../unoresizetizer/r/Assets/Images/back.scale-100.png' was ignored, because there's another item with the same LogicalName ('Assets/Images/back.png')
warning MT7156: The BundleResource item '.../unoresizetizer/r/splash_screen.png' was ignored, because there's another item with the same LogicalName ('splash_screen.png')
warning MT7156: The BundleResource item '.../unoresizetizer/r/splash_screen.scale-100.png' was ignored, because there's another item with the same LogicalName ('splash_screen.png')

CI run: https://github.com/CommunityToolkit/Datasync/actions/runs/29093946725 (todoapp-uno / ios-maccatalyst job)

Root cause (tentative - needs investigation)

The project supplies SVG source assets (Assets/Icons/icon_foreground.svg, Assets/Splash/splash_screen.svg) that Uno's unoresizetizer MSBuild tooling rasterizes into multiple PNG variants (base + scale-100, etc.) under obj/.../unoresizetizer/r/.... On the ios/maccatalyst heads specifically, the generated scale-100 variant appears to collapse to the same LogicalName as the unscaled base variant (or an already-bundled back.png/splash_screen.png from elsewhere in the resource pipeline), so one copy silently wins and the other is dropped. The build still succeeds and produces a working icon/splash - this is a warning about redundant bundling, not a missing asset - but it's worth confirming nothing visually regresses (e.g. wrong icon scale bundled) since we can't visually verify the iOS/macCatalyst app locally (no Xcode/simulator available in this environment).

back.png doesn't correspond to any file directly under samples/todoapp/TodoApp.Uno/TodoApp.Uno/Assets/ - it may be a default asset pulled in via Uno.Toolkit/Uno.Extensions.Navigation (the project uses both via UnoFeatures) for a default back-navigation icon.

Suggested fix

1. Investigate whether this is expected, benign unoresizetizer behavior for any Uno Single Project app with SVG-sourced icons/splash screens on ios/maccatalyst (in which case it may not be actionable in this repo at all, similar to Investigate resolving NU1903 for Tmds.DBus in Uno desktop sample #506/Major-version bump: Uno Platform 5 -> 6 (TodoApp.Uno sample) #524's now-resolved Uno.Wasm.Bootstrap-style ecosystem quirks), or a genuine duplicate-inclusion bug in how this project's Assets folder/UnoIcon/UnoSplashScreen items are wired up.
2. If it's the latter, identify and remove the duplicate resource inclusion.
3. If it's expected/benign, consider whether it's worth reporting upstream to Uno Platform, or just documenting/suppressing here.