fix(ui): static inline code contrast fix + chip styling

Opcion A pura: fondo de inline code y color corregidos directamente
en los 42 themes JSON (darken 5 light / lighten 5 dark, contraste
WCAG en light). Sin metodos nuevos en cssGenerator ni generadores.
Se mantiene solo el padding/radius del chip en index.css y
composerHighlight.ts.

packages/ui/src/lib/theme/themes/nightowl-light.json

@@ -133,8 +133,8 @@
       "heading4": "#403F53",
       "link": "#2AA298",
       "linkHover": "#4876D6",
-      "inlineCode": "#2AA298",
-      "inlineCodeBackground": "#F0F0F0",
+      "inlineCode": "#00746A",
+      "inlineCodeBackground": "#EEEEEE",
       "blockquote": "#7A8181",
       "blockquoteBorder": "#D9D9D9",
       "listMarker": "#4876D699"