Update dependency textual to v3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
textual	==2.1.2 -> ==3.0.0

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Release Notes

Textualize/textual (textual)

v3.0.0

Compare Source

Changed

• Breaking change: App.query and friends will now always query the default (first) screen, not necessarily the active screen.
• Content now has a default argument of an empty string, so Content() is equivalent to Content("")
• Assigned names to Textual-specific threads: textual-input, textual-output. These should become visible in monitoring tools (ps, top, htop) as of Python 3.14. https://github.com/Textualize/textual/pull/5654
• Tabs now accept Content or content markup https://github.com/Textualize/textual/pull/5657
• Buttons will now use Textual markup rather than console markup
• tree-sitter languages are now loaded lazily, improving cold-start time https://github.com/Textualize/textual/pull/563

Fixed

• Static and Label now accept Content objects, satisfying type checkers https://github.com/Textualize/textual/pull/5618
• Fixed click selection not being disabled when allow_select was set to false https://github.com/Textualize/textual/issues/5627
• Fixed crash on clicking line API border https://github.com/Textualize/textual/pull/5641
• Fixed Select.selection now correctly returns None if Select.BLANK is selected instead of an AssertionError
• Fixed additional spaces after text-wrapping https://github.com/Textualize/textual/pull/5657
• Added missing scroll_end parameter to the Log.write_line method https://github.com/Textualize/textual/pull/5672
• Restored support for blink https://github.com/Textualize/textual/pull/5675
• Fixed scrolling breaking on DataTable with overflow: hidden https://github.com/Textualize/textual/pull/5681

Added

• Added Widget.preflight_checks to perform some debug checks after a widget is instantiated, to catch common errors. https://github.com/Textualize/textual/pull/5588
• Added text-padding style https://github.com/Textualize/textual/pull/5657
• Added Content.first_line property https://github.com/Textualize/textual/pull/5657
• Added Content.from_text constructor https://github.com/Textualize/textual/pull/5657
• Added Content.empty constructor https://github.com/Textualize/textual/pull/5657
• Added Content.pad method https://github.com/Textualize/textual/pull/5657
• Added Style.has_transparent_foreground property https://github.com/Textualize/textual/pull/5657

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