Light mode: use the brand pink (#E0589A) as the accent

Per design choice, light --text-accent matches the dark-mode brand pink
instead of a darkened magenta — vivid and consistent across schemes.
Note: ~3.3:1 on white, so it's ideal for the large display wordmark; small
labels/links trade some contrast for brand fidelity.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: btravers

packages/theme/src/tokens.css

@@ -147,7 +147,7 @@
   --faint: #978996;
 
   --accent:      #E0589A;   /* fill unchanged (dark ink on top) */
-  --text-accent: #C42A6C;   /* punchier vivid beetroot, ~5.1:1 on white (was #A52260) */
+  --text-accent: #E0589A;   /* brand pink in light too (brand choice) — vivid; ~3.3:1, great for the display wordmark, low-contrast on small labels */
   --text-green:  #15683A;   /* ~5.2:1 on white — affirmative text */
 
   --accent-wash:   rgba(224, 88, 154, 0.12);