0.3.0

Added

• DisplayList.truncated: true when a recursion guard dropped a subtree
  (layout- or emission-stage) on stack exhaustion — partial output is now
  distinguishable from a complete render. Excluded from the serialized
  wire format (RaTeX parity). FormulaCache never persists truncated
  results (they are thread-dependent), so a later render on a larger
  stack recomputes fully.
• Emoji rendering fixes in the CoreGraphics backend: translucent colors
  now apply to color-bitmap emoji exactly once, and non-BMP emoji resolve
  the color emoji font (previously fell back to monochrome LastResort).

Changed (KaTeX-correctness; may affect callers of lenient inputs)

• Unterminated \verb and x\limits^2 now throw ParseError
  (previously accepted silently, matching a RaTeX bug).
• \gdef/\xdef/\global\def defined inside a group now survive group
  exit; zero-arg delimited \def macros validate and consume their
  parameter text; \def\a#{…} keeps braces balanced (TeXbook §203).
• \operatorname/\operatorname* limit-control semantics now match
  KaTeX exactly; \vcenter physically centers ink on the math axis;
  multi-char \cancel no longer overlaps the following atom.
• \middle nested deeper than 8 \left…\right stretch scopes renders
  at natural size (visible, unstretched) instead of exponential work or
  invisible placeholders; \middle inside \hbox stretches correctly.
• Layout recursion on Darwin is bounded by the stack-headroom probe alone
  (no artificial 1024-depth ceiling); deep-but-legitimate trees (long
  combining-accent chains) render fully on large stacks.

Fixed

• SVG output is well-formed XML for the emoji font stack, escapes
  provider-supplied path/href strings (including quotes fused with
  combining marks), and cache hit/miss statistics count each request
  exactly once under concurrency.

Performance

• PNG chunk CRC-32 via libz hardware instructions (~80× the table loop);
  glyph translucency and SVG escaping hot paths trimmed; \middle
  containment scan short-circuits; per-node layout dispatch no longer
  copies options on Darwin.