Tooling · Catalogs: the audit reads active and code; avatar and container sizes

The audit now holds fg_subtle on active, a selected row's fill, and
each syntax color over the editor's surface, a code block and the
current line. What it found is fixed at the source: fg_subtle is
#696764 light and #94928f dark, syntax.comment follows it, and the
light number, constant and attribute darken to #a3591b, #aa5529 and
#9f5d12. The token viewer adds avatar and container sizes, draws a
container at its share of the widest so it stays in its row, and
names what it shows: the shared colors and scales. Tests pin every
variant, the hue each chart row reads and the code rows.

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

tasks/ch31-43.md

@@ -366,7 +366,7 @@
 
 ## T43c Tooling · Catalogs
 
-- [x] DesignTokenViewer → `tooling::DesignTokenViewer`: every token of the theme in the mode shown, named as code reads it, with its value
+- [x] DesignTokenViewer → `tooling::DesignTokenViewer`: the theme's shared colors and scales in the mode shown, named as code reads them, with their values
 - [x] IconBrowser → `forms::IconPicker`: the library's icons, searchable
-- [x] A11yChecker — contrast audit → `tooling::A11yChecker`: each text color over its surfaces at 4.5:1, the focus ring and chart hues beside the page at 3:1, failures first
+- [x] A11yChecker — contrast audit → `tooling::A11yChecker`: each text color over its surfaces and each code color over the editor's at 4.5:1, the focus ring and chart hues beside the page at 3:1, failures first
 - [x] ScreenshotTest Harness — self-capture; scripted input since T01 → `examples/gallery --capture`: every page light and dark, then its scripted states