Two new self-test steps for the hybrid FontManager:
- FontManagerCtorSmokeStep proves all five handles land on the manager
after Phase-1 resolve (ItalicFont nullable per Config.ItalicEnabled)
and that no atlas-load exception is sitting on any of them
- FontPushSmokeStep proves IFontHandle.Push() returns without throwing
for the two main delegate handles right after plugin load
Both steps run on the framework thread via the xlperf self-test path
and are registered alongside the existing theme-switch step in
SelfTestRegistry.
JonKazama-Hellion
4059b363a3