The top-bar theme switch was bound twice — core/theme.js attached a click
handler to #theme-toggle-desktop while runtime/main.js delegated click on
.toggle-theme, and both ship in main.min.js, so one press toggled twice and
the button looked dead.
Also realign the control with the reference:
- Drop the far modifier from fa-toggle-theme so the sun/moon glyphs resolve
against the Solid face at the reference weight instead of Regular.
- Restore .toggle-radius .fa/.icon to the reference form (left/right 0 +
auto margin only). The extra position/top/transform/size/flex block and
the > i selector were overriding the shared abs-* centering rule.
- Replace the per-ID bindings with one delegated listener so the floating
rail, which carries no id, keeps working.
- Remove dead theme.js queries for selectors no markup or stylesheet ships
(#theme-toggle, #dropdown-theme-toggle, .theme-icon-moon/.theme-icon-sun,
[data-action='toggle-theme'], .is-dark).
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>