Native RTL support for Persian, Arabic, and Hebrew (UI + chat)

[amiraliak99]

Summary

T3 Code currently only supports LTR layout. I’d like to request native RTL support for languages such as Persian, Arabic, and Hebrew.

Problem

When typing or reading RTL text in the chat/composer, the layout is incorrect. Punctuation, alignment, and mixed LTR/RTL content (like code) become hard to read. The sidebar and settings also remain LTR.

Proposed solution

• Add an Appearance setting: Text direction: Auto / LTR / RTL.
• For Auto, detect the language of each message or use dir="auto".
• Apply dir="rtl" to message containers, composer, and relevant UI parts.
• Keep code blocks, diffs, and terminal output LTR (dir="ltr").
• Use CSS logical properties (margin-inline-start, padding-inline-end, etc.) instead of physical left/right.
• Optionally add a Persian/Arabic-friendly font.

Scope

• Chat messages
• Composer/input
• Sidebar and settings (optional, but nice)
• Code blocks and terminal must remain LTR

Alternatives

• The community tool t3code-rtl patches the app, but it breaks on every update and doesn’t support AppImage.
• Manual CSS injection or forking works but is not user-friendly.

Use case

Many developers use Persian, Arabic, or Hebrew. Native RTL support would make T3 Code usable for them without hacks or unofficial patches.

[juliusmarminge]

Duplicate of #6716 — same native RTL / bidi request (logical CSS, dir=auto, Arabic/Hebrew/Persian UI + chat). Please continue there.

Related lineage: #1767 → #1771 (closed in favor of the logical-utilities approach that became #6716). Narrower open work: chat message direction in #10779; annotation RTL in #4644.