Eliminate all remaining text-kodo-content-dim from user-facing source files.
This legacy token (hardcoded Gray-400) is now fully replaced by the
theme-aware text-muted-foreground token across UI primitives, settings,
social features, playlists, modals, inventory, and admin views.
Only story files (.stories.tsx) retain the old token for reference.
Total migration: ~345 instances across 87 files (this + previous commit).
Co-authored-by: Cursor <cursoragent@cursor.com>
