Command + Left/Right Arrow Does Not Move Cursor to Start/End of Line in Text Box on Mac

[FoxMcWeezer]

Issue: Command + Left/Right Arrow Does Not Move Cursor to Start/End of Line in Text Box on Mac

Description:

When using the text box in the application, the Command + Left Arrow or Command + Right Arrow keyboard shortcuts on macOS do not behave as expected. Normally, in native macOS applications (e.g., Notes, Safari, TextEdit), pressing Command + Left Arrow moves the cursor to the beginning of the line, and pressing Command + Right Arrow moves the cursor to the end of the line.

However, in this specific text box:

• Command + Left Arrow and Command + Right Arrow do not move the cursor at all. The cursor stays in its current position.

Steps to Reproduce:

1. Open the text box in the application.
2. Type any text.
3. Press Command + Left Arrow (on a Mac keyboard).
   • Expected: Cursor should move to the start of the current line.
   • Actual: Cursor does not move.
4. Press Command + Right Arrow (on a Mac keyboard).
   • Expected: Cursor should move to the end of the current line.
   • Actual: Cursor does not move.

Expected Behavior:

• Command + Left Arrow should move the cursor to the beginning of the line.
• Command + Right Arrow should move the cursor to the end of the line.

Actual Behavior:

• Command + Left Arrow and Command + Right Arrow have no effect in the text box, and the cursor remains in its current position.

Environment:

• Operating System: macOS
• Reproducible: Yes/

Additional Notes:

• This issue affects macOS users specifically, as Command + Left/Right Arrow is the standard keyboard shortcut for cursor movement to the start/end of the line across most applications in macOS.
• It would be ideal if this behavior matched the native macOS experience.

[jdorfman]

Thanks @FoxMcWeezer sending this to the product team!

[sqs]

Thanks for reporting and sorry for this issue. We will need to upstream a fix to the Lexical editor, which we use for the text editor field. As a partial workaround, Opt+Left/Right Arrow does work to navigate by word/token. And Cmd+Left/Right Arrow does work if the cursor is adjacent to text (but not when it's adjacent to an @-mention chip).

Note to our team: You can repro this at https://playground.lexical.dev/. Insert a poll (which is a DecoratorNode), and then try keyboard navigation with Cmd+Left/Right Arrow.

Internal tracking issue: https://linear.app/sourcegraph/issue/CODY-3686/cmdleftright-arrow-keys-dont-work-in-chat-lexical-editor-when-cursor