UI: drop the Assembly.LoadFrom scan in UiManager #249

Current State

UiManager.cs:320-357 resolves component types with Type.GetType, then scans loaded assemblies, then Assembly.LoadFroms every *.dll in AppContext.BaseDirectory. Android packs assemblies into an assembly store, so the scan finds nothing; it also blocks trimming and AOT.

Tasks

• Resolve types from loaded assemblies and the type registry/manifest
• Remove the LoadFrom scan
• Add a test

Acceptance Criteria

• UI examples still resolve their component types
• No Assembly.LoadFrom in runtime code

Related

• Android plan task A13 · seniority Jr · mergeable now (.NET 10)
• Platform roadmap: Platform roadmap research: Steam Deck, Android, iOS, Web #100