migrate-v8-to-v9

# Preact v8-to-v9 migration checklist Before starting, run `intent load @tanstack/table-core#migrate-v8-to-v9`. Audit its entire shared checklist and read the detailed core mappings for APIs present in the application. This checklist adds the Preact-specific changes. Framework prerequisite: Preact 10 or newer (`preact >=10`). ## Adapter audit - [ ] Replace React-adapter imports and `useReactTable` with native `@tanstack/preact-table` and `useTable`. - [ ] Remove compat aliases that existed only for Table. Preserve aliases still required by other libraries, including a React Virtual integration. - [ ] Keep model inputs stable and configure explicit features/row-model slots; complete the shared core checklist. - [ ] Use selected `table.state`, `table.Subscribe`, or Preact Store subscriptions; snapshots alone do not rerender consumers. - [ ] Pair controlled slices with callbacks, or supply stable atoms from `@tanstack/preact-store`; remove global `onStateChange`. - [ ] Use native Preact FlexRender components. Adopt `tableOptions` or `createTableHook` only for repeated app conventions. ## Load the affected details When the audit finds old Preact construction, state, rendering, or app-hook code, read [adapter migration details](references/adapter-migration.md) before editing it. For a replacement render scaffold, read [getting started](../getting-started/SKILL.md). For controlled or stale state after migration, read [table state](../table-state/SKILL.md). Shared pinning, sizing, sorting, selection, prototype-method, type, and registry changes stay in the core migration references. Renaming `useReactTable` alone does not complete the migration. ## Verify the migration - [ ] Type-check against the installed v9 adapter and exercise every enabled client/manual feature flow. - [ ] Verify external state writes, reactive data replacement, and the framework rendering paths changed above. - [ ] Complete the core checklist, including layout and selection behavior when those features are used. - [ ] Replace temporary `stockFeatures` when the target is explicit feature tree-shaking. ## API discovery Inspect `node_modules/@tanstack/preact-table/dist/index.d.ts` and the exported adapter declarations. Use `node_modules/@tanstack/table-core/dist/index.d.ts` for shared APIs.