feat: add superderive child and open phase-2 routing

Attach the stepwise derivation toolkit as a submodule and default SUPERPAPER_PHASE to 2 so rewrite-figure can use superderive. Notes still keep align for short expansions without cancel or subst.
2026-08-17 10:06:39 +08:00
parent 3a322aa8dc
commit e6918ffa35
24 changed files with 659 additions and 12 deletions
@@ -0,0 +1,2 @@
+\section{总结与延伸}
+四步以内、没有消项或代入要画出来时，仍然用 \texttt{align}。