⬆️ Update dependency textual to v8.2.7

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
textual	8.2.6 → 8.2.7

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Release Notes

Textualize/textual (textual)

v8.2.7

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Added

• Added support for Kitty key protocol "Report all keys as escape codes" which enabled alt+backspace on Warp #​6544
• Added support for detecting separate modifier keys for terminals that support the Kitty key protocol #​6544
• Added TEXTUAL_DISABLE_KITTY_KEY env var to disable Kitty key protocol support (debug aid). #​6544

Changed

• Undo/redo/copy/cut/paste in TextArea will now work with cmd+ on supported terminals #​6543
• In TextArea, ctrl+u will now delete a newline if the cursor is at the start #​6543
• in TextArea alt+delete is now bound to delete word right #​6543
• Text opacity applied to an ansi theme will now set the dim attribute if the opacity is < 50% #​6546

Fixed

• Fixed text opacity with ANSI themes creating RGB colors. #​6546

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