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>

docs/adr/0002-library-ui-and-player.md

@@ -13,7 +13,7 @@ Status: Accepted (2026-10-28)
    Stretching = hold, both-sides flag, rounds. Workout Steps can be grouped into Supersets.
 5. **Library browsing**: search + muscle/equipment/level filters, reused as the Plan exercise picker.
 6. **Structure & design**: Mode switch at top; per-mode tabs Plans · Library · History.
-   Stretching = calm/light (sage/teal, rounded, slow). Workout = dark/energetic (orange/red, bold, snappy).
+   Stretching = calm/light (lavender/violet since ADR 0007, first sage/teal; rounded, slow). Workout = dark/energetic (orange/red, bold, snappy).
    Last-used mode is remembered.
 7. **Player cues**: Visual cues (countdown ring, accent pulse, next cards, auto-advance, screen kept on)
    plus a gentle, non-annoying sound. No vibration.