Redesign the UI after the fitness reference and replace the logo

Light sage-to-cream ambient backdrop, frosted glass controls and painted
SceneArt landscapes in place of photography. Home becomes a dashboard with a
two-tone greeting, a frosted summary ring, category portraits, an up-next rail
of image-led cards and a floating glass tab bar. The routine library gets an
image header and painted cards; the player gets a scene stage, steps on an
arc, a dotted clock and a night pill with a lime spark. Goals become painted
cards in their own colour.

New logo: a lime sun resting on a ground line under two arcs. The splash
raises the sun and lights the arcs; launcher icons and native splash are
regenerated to match.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01KhQh614DMeYoQEH9SoMRUw

frontend/CLAUDE.md

@@ -109,10 +109,12 @@ status field. That's what makes honest history and excuse analysis possible.
 
 ## 6. Design language
 
-See `design.md`. In short: black chrome → white sheet with a 28 radius →
-oversized **Light** display title → tiny grey all-caps labels above values.
+See `design.md`. In short: sage-to-cream ambient backdrop, frosted glass
+controls, painted `SceneArt` instead of photos, image-led cards, two-tone
+greetings, night pills with a lime spark.
 
-- Every screen is built from `Sheet` (`designs/Shell.dart`).
+- Screens are built from `Sheet` (`designs/Shell.dart`); Home, Routines and
+  the routine player compose `AmbientBackground` + glass directly.
 - Display titles are `TextType.Light`. Bold is for labels and metrics only.
 - Never raw `Text`/`TextStyle` — use `text()` from `designs/text/Text.dart`.
 - Never inline hex — use `utils/Colors.dart`.