loadIcons runs in TextureStitchEvent.Post and could cache icons before
other mods finished theirs in the same event (Chisel CTMLib -v4 submaps),
leaving microblocks with missing or previous-stitch textures.
loadIcons now marks icons stale; the first icont() read after a stitch
rebuilds them once. Icons set through icont_$eq are kept. Addon materials
reading icont() get the fix without API changes.
Fixes GTNH issue 27183 without relying on handler priority (upstream #63).
Keep the existing Java recipe fix for PR #61. Port PR #62 so client additions reuse multipart tiles without converting stale blocks, preserving server-side conversion. Add a regression for stale client torches and subsequent additions.
Validation: full build, formatting, checkstyleTest and Scala-free API examples passed; 588 unit tests and 300 Forge functional tests passed without skips. The new Forge regression failed before the fix by retaining an extra converted torch.
Algent