feat: add light mode support

[EmperorOrokuSaki]

Summary

• Adds theme.colorScheme: "system" to vocs config
• Blog now respects the user's OS light/dark preference
• Users can also toggle manually via the Vocs theme switcher

Test plan

• Verify light mode renders correctly with OS set to light theme
• Verify dark mode still works with OS set to dark theme
• Verify manual toggle works in the UI

🤖 Generated with Claude Code

[github-actions]

PR Preview Action v1.8.1
Preview removed because the pull request was closed.
2026-03-20 02:50 UTC

[g4titanx]

vocs has the theme switcher feature @EmperorOrokuSaki which automatically activates as soon as you have a content to add on the left nav bar on the blog posts themselves, you can check the vocs config, that's why i added a sidebar feat.

has a weird of way defining where the theme toggle is placed, for example, it only comes up on the blog posts it self, on the left nav panel, at the bottom and it wouldn't show anywhere else unless we make our own custom theme switcher

eventually i'd highly recommend we use some other sdk or we create our blog from scratch tbh

[EmperorOrokuSaki]

vocs has the theme switcher feature @EmperorOrokuSaki which automatically activates as soon as you have a content to add on the left nav bar on the blog posts themselves, you can check the vocs config, that's why i added a sidebar feat.

has a weird of way defining where the theme toggle is placed, for example, it only comes up on the blog posts it self, on the left nav panel, at the bottom and it wouldn't show anywhere else unless we make our own custom theme switcher

eventually i'd highly recommend we use some other sdk or we create our blog from scratch tbh

Booooo