[refactor] use contexts with no intermediate hooks, and move logic to providers

[severo]

see #449

[Copilot]

Pull request overview

Refactors internal state access to rely on direct useContext(...) reads (removing intermediate “useX” hooks) and moves some defaulting logic into providers/contexts to reduce rerenders and simplify memoization, aligning with issue #449.

Changes:

• Replace custom context hooks (useViewportWidth, useHeaderHeight, useData, etc.) with direct useContext(Context) usage across providers/components/tests.
• Introduce a default header/table-corner height via defaultTableCornerHeight and initialize TableCornerSizeProvider with that default.
• Update provider tests to consume the raw contexts rather than removed hooks.

Reviewed changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
test/providers/ViewportSizeProvider.test.tsx	Updates test to use raw viewport contexts via useContext.
test/providers/TableCornerSizeProvider.test.tsx	Updates test expectations for default header height and uses raw contexts.
test/providers/DataProvider.test.tsx	Replaces custom hooks with raw contexts for provider verification.
src/providers/TableCornerSizeProvider.tsx	Initializes table-corner height to a default and continues providing width/height/setter contexts.
src/providers/SelectionProvider.tsx	Switches from useData/useNumRows hooks to direct context reads.
src/providers/ScrollProvider.tsx	Uses ViewportHeightContext / TableCornerHeightContext / NumRowsContext directly.
src/providers/OrderByProvider.tsx	Uses ExclusiveSortContext directly.
src/providers/ColumnWidthsProvider.tsx	Uses ViewportWidthContext / TableCornerWidthContext / NumColumnsContext directly.
src/providers/ColumnParametersProvider.tsx	Uses ColumnDescriptorsContext directly.
src/providers/CellNavigationProvider.tsx	Uses NumRowsContext directly.
src/hooks/useFetchCells.ts	Uses DataContext / NumRowsContext directly for fetch computations.
src/contexts/ViewportSizeContext.ts	Removes wrapper hooks, leaving only contexts.
src/contexts/TableCornerSizeContext.ts	Adds defaultTableCornerHeight, makes height context non-optional, removes wrapper hooks.
src/contexts/DataContext.ts	Removes wrapper hooks (including useData), sets a non-throwing default DataContext value.
src/components/TableCorner/TableCorner.tsx	Reads SetTableCornerSizeContext directly.
src/components/HighTable/Wrapper.tsx	Reads NumRowsContext / TableCornerHeightContext directly.
src/components/HighTable/Slice.tsx	Reads DataContext / DataVersionContext / NumRowsContext directly.
src/components/HighTable/Scroller.tsx	Reads SetViewportSizeContext directly.

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[Copilot]

Pull request overview

Copilot reviewed 20 out of 20 changed files in this pull request and generated 2 comments.

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