Stack 3/4 · previous: #50687 · next: #50689
## Problem
`DataTableInfinite` could only open one row at a time. Multi-select
meant clicking a separate checkbox column, with no support for ranges or
modifier keys.
## Solution
This PR only adds shared primitives. Behavior stays the same until a
consumer passes `onSelectRow` (wired up in the next PR).
- `selectTableRow` (`rowSelection.utils.ts`): a pure reducer for plain,
Cmd/Ctrl-toggle, Shift-range, and additive-range selection over the
current display order, with a fixed anchor.
- `useTableRowSelection`: holds the selection state and resets it when
its `scope` (project/filters) changes.
- `DataTableProvider` gets an optional `onSelectRow`. When it's set,
`DataTableInfinite` rows use it and reflect `row.getIsSelected()`. Rows
also get `aria-selected`, Space activates them like Enter, and
shift-click no longer selects text.
## Review instructions
1. Read `rowSelection.utils.test.ts`: it covers the selection rules.
2. Open Unified Logs. Row clicks should behave the same as on master.
## Checklist
- [ ] I have read
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Added richer data-table row selection, including multi-select, range
selection, toggling, and keyboard support.
- Added visual and accessibility feedback for selected rows, including
pointer cursor and `aria-selected`.
- Preserved selections across paging and live updates while resetting
them when filters or projects change.
- Added support for external row-selection callbacks.
- **Tests**
- Added comprehensive coverage for selection behavior and state
persistence.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
