ENH: test enable_RTL in qe_theme

[mmcky]

This PR enables the new enable_RTL to quantecon_book_theme

QuantEcon/quantecon-book-theme#292

• test ENH: Add RTL (Right-to-Left) script support to quantecon-book-theme quantecon-book-theme#292 locally
• Some of the test lectures already contain rtl div so we should remove this
• update to released quantecon-book-theme=0.9.0

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[mmcky]

@Zahra-khanzadeh would you mind to take a look at

https://689a768cc619e080ad706f47--majestic-griffin-10b166.netlify.app/about_py

and let me know if this is how rtl script should be formatted

Also the titles in the lectures are currently appearing in the toc as they are all level 1 headers #. In a document there should be 1 level 1 header # and the rest should be level 2 or 3 etc. (## and ###) for markdown syntax.

https://689a768cc619e080ad706f47--majestic-griffin-10b166.netlify.app/intro.html

[mmcky]

Issues:

• theme update appears to turn the title bar left-to-right.

• sidebar is on the LEFT

[mmcky]

@Zahra-khanzadeh thanks for your feedback.

Here is the latest deployment of the new lecture

https://689be36f80d4199f07262392--majestic-griffin-10b166.netlify.app/python_by_example

Please let me know which elements of the RTL isn't right and we can adjust the theme to cater to them.

For example, should the section number 3.1 be on the LHS or the RHS of the subtitle?

I can be free to Zoom later this week if you want to run through edits / changes. Cheers.

[Zahra-khanzadeh]

Thanks a lot, @mmcky ! 🙌
I was genuinely excited when I saw the result, everything looks absolutely perfect to me, and nothing needs to be changed on your side.

About the earlier points (title bar LTR / sidebar on the left), I don’t consider these issues. This is exactly how most international websites handle RTL mode — for example, the UN website does the same when switching to Persian — so it’s both professional and correct.

The only edits needed are on my side: in a few places I typed some technical terms LTR instead of RTL, and I’ll fix those soon. These are content-related, not theme-related.

Everything looks fantastic, thanks again! 🎉

[Copilot]

Pull Request Overview

This PR enables the new enable_RTL feature in the quantecon-book-theme by updating the theme to version 0.9.0 and configuring RTL support in the Sphinx configuration.

• Update quantecon-book-theme from 0.8.2 to 0.9.0
• Enable RTL (Right-to-Left) text support by adding enable_rtl: True to the Sphinx configuration
• Upgrade Python version from 3.12 to 3.13 and Anaconda to 2025.06

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
lectures/_config.yml	Adds enable_rtl: True configuration to enable RTL text support
environment.yml	Updates quantecon-book-theme to 0.9.0 and upgrades Python/Anaconda versions
.github/workflows/ci.yml	Updates CI workflow to use Python 3.13

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[mmcky]

@Zahra-khanzadeh thanks for your patience with this feature. We now have a released version of the quantecon-book-theme that includes support for RTL. This PR enables it for this project.