This PR fixes a bug where a user might choose `classic-dark` as a theme
in `studio` but then `docs` and `marketing` apps will look weird.
To test:
- Change the localStorage value of `theme` to `classic-dark`
- Open `www` and `docs` apps, they should look ok
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
* **New Features**
* Added a new "classic-dark" theme option for enhanced visual
customization.
* **Improvements**
* Unified and simplified theme handling across apps for more consistent
behavior.
* Improved system-theme detection and smoother transitions when
switching themes.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
This PR moves several components which rely on `next` out of the `ui`
package to the `ui-patterns` package.
`ui-patterns` package is intented to be imported with specific imports
so it's ok if there are components reliant on `next` in there.
The `SonnerToaster` component has removed its dependency by requiring a
prop for `theme`.
wip
<!-- This is an auto-generated comment: release notes by coderabbit.ai
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## Summary by CodeRabbit
# Release Notes
* **New Features**
* Added a new Learn application offering foundational Supabase courses
with interactive documentation
* Courses include Architecture, Authentication, Data Fundamentals,
Security, Storage, Realtime, and Edge Functions
* Chapter tracking and progress indicators for course completions
* Responsive sidebar navigation with search/command menu
* Theme switching support (light, dark, classic dark modes)
* Mobile-friendly course interface
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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Co-authored-by: Alan Daniel <stylesshjs@gmail.com>
Co-authored-by: Claude Sonnet 4.5 <noreply@anthropic.com>
