Covers the pure-logic surface of commit 1:
VitalsVMTests
* HealthPercent reads from CombatState.GetHealthPercent
* safe-default 1.0 when GUID unknown / not yet set / never updated
* SetLocalPlayerGuid reroutes lookup to the new guid (no stale cache)
* StaminaPercent / ManaPercent are null for D.2a scope
* ctor throws ArgumentNullException on null CombatState
PanelContextTests
* record-struct fields round-trip
* value-based equality
NullCommandBusTests
* Publish accepts any record type without throwing
* Instance is a true singleton
csproj template mirrors AcDream.Core.Tests (xUnit 2.9.3, Test.Sdk 17.14.1,
runner 3.1.4, coverlet 6.0.4, implicit Using Xunit). References only
AcDream.UI.Abstractions — no runtime / GL dependency, tests run fast.
