New Features
- Step-1-failure whole-figure fallback: on single-step failure, degrade to one-shot whole-figure generation while keeping the self-repair budget.
Bug Fixes
- Fixed placeholder false-positives, nested expressions, and illegal-XML self-heal issues across several typical questions.
- Raised plotting
max_tokens from 4096 to 8192, reducing truncation on complex figures.
- Fixed three occasional 500s (LaTeX delimiter mistaken for a placeholder,
<input> inline command call, single-letter placeholder bypassing rules).