[makhnatkin]

Require a dependency set compatible with UIkit 8

• Required UIkit 8, components 5, and React/React DOM 18 or 19 in the editor, header, LaTeX, Page Constructor extensions, and the viewer.
• Added explicit drag-and-drop, virtualization, and sizing dependencies for legacy components and the code language selector.
• Declared Page Constructor 9, its Diplodoc extension 0.14, and Diplodoc transform 4.78.12 in the dependency catalog. Lockfile still resolves 7.25, 0.13.3, and 4.75.1 until the new releases are published.

Preserve existing menus and selection behavior

• Moved menus, dropdowns, suggestion lists, and their types to the UIkit legacy entry point across the editor and demo; updated their CSS prefixes.
• Migrated toolbar, code language, and deprecated tooltip selector option types.
• Enabled explicit virtualization for code language lists with at least 50 options.

Replace APIs removed in UIkit 8

• Updated application providers in Storybook, Playwright, and form tests.
• Migrated popup anchors and close callbacks; outside-click handling is kept in deprecated tooltip controls.
• Replaced removed spacing, gap, centering, and numeric sizing props.
• Replaced the dark-theme iframe background with the contrast color token.

Keep forms and prompt submission working

• Replaced legacy tabs in file and image forms with TabList and Tab.
• Moved image-settings and GPT prompt inputs from onKeyPress to onKeyDown; Enter is ignored during IME composition, including keyCode 229.
• Added useGpt tests for Enter during and after composition.

Page Constructor

• Migrated editing controls to the new layout, popup, and button event APIs; double-click isolation is preserved.
• Updated light/dark visual baselines for settings, Mermaid, and Page Constructor.

Documentation

• Added docs/uikit-8-migration.md with dependency, provider, select, and CSS migration guidance and the prerequisites for publishing compatible releases.

🤖 Generated with Claude Code

[gravity-ui]

[gravity-ui]