Persist the theme selector choice across page loads

Save an explicit light/dark choice to localStorage and clear it when
switching back to system. An inline head script applies the saved
colour scheme before first paint to avoid a flash of the system theme.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Jonny Barnes 2026-10-24 20:20:21 +01:00
commit c3cf597950
Signed by: jonny
SSH key fingerprint: SHA256:CTuSlns5U7qlD9jqHvtnVmfYV3Zwl2Z7WnJ4/dqOaL8

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