App icon and a lavender Stretching palette

A lotus inside a dry-brush ensō, with a small plate in the gap and a small
barbell as the lifting hint. Drawn by tools/icon/make_icon.py and wired up
with flutter_launcher_icons; the launch screen uses the icon's lavender.
Stretching Mode moves from sage/teal to the icon's lavender and violet.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

GLOSSARY.md

@@ -11,7 +11,7 @@ app: design, Exercise Library, Plans and History. The last-used Mode is remember
 _Avoid_: Tab, section, category
 
 **Stretching Mode**:
-The calm Mode: light design, sage/teal, rounded shapes, slow transitions.
+The calm Mode: light design, lavender and violet, rounded shapes, slow transitions.
 
 **Workout Mode**:
 The energetic Mode: dark design, orange/red on near-black, bold type, snappy transitions.