Add RTL toggle button for preview pane

[EssamSoft]

Adds an RTL button (text-only, no icon) to both the desktop toolbar and mobile menu that toggles right-to-left direction on the markdown preview. State is persisted to localStorage and restored on page load.

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Project	Deployment	Actions	Updated (UTC)
markdown-viwer	Ready	Preview, Comment	Apr 7, 2026 4:26am

[ThisIs-Developer]

Thank you for the idea and implementation, but there is a question about why we need the RTL button. Already in #61 , it mentions that the space needs to be clear for more working space. I don't think it's a good idea to add it right now, but I have a plan to implement it. I want to make a panel with all tools like H1, H2, H3, inline, bold, table, code, quote, etc., and there I will add this RTL button. Is that ok?

[EssamSoft]

Thank you for the idea and implementation, but there is a question about why we need the RTL button. Already in #61 , it mentions that the space needs to be clear for more working space. I don't think it's a good idea to add it right now, but I have a plan to implement it. I want to make a panel with all tools like H1, H2, H3, inline, bold, table, code, quote, etc., and there I will add this RTL button. Is that ok?

Thanks for your response. I think adding a toolbar might make the UX a bit more complicated. The simplified RTL button is very useful for me as an Arabic speaker. Some documents contain both Arabic and English, which causes reading issues due to the conflicting text directions between the two languages. For my use case, the ideal solution is the ‘magic’ RTL button to switch direction on demand while reading.