[daniil-filippov-dev]

🤖 AI TLDR

Add an opt-in GridStack renderer with nested containers and run the same supported flat DashKit contract against legacy and GridStack.

🤖 AI-generated

Depends on #328. Merge preparation first, then update this branch from main if needed and retarget this PR to main before merging.

The root entry keeps the legacy renderer. The new @gravity-ui/dashkit/gridstack entry provides native layout, nested document validation/serialization, controlled restoration and layout projection, sharing plugin registration, lifecycle and ref methods with legacy.

Normal npm test runs the ten common flat scenarios introduced by #328 against both actual renderers with identical assertions: nine mounted widget scenarios and one flat statics scenario per engine. Pure helpers run once; engine-specific suites remain separate. Storybook-backed TypeScript Playwright specs replace the standalone CJS harness. Chromium native contracts run in CI; Firefox and WebKit projects are also available.

Nested visual autoheight respects finite containers without changing saved height. Explicit item-update isolation preserves legacy defaults. Authoritative controlled revisions cancel stale gestures; widgets in unrendered groups keep canonical membership and refs during later saves. Nested nowrap constraints stay in local grid units and include container footprints. Nested grids measure their own content width and retain a full-height empty drop surface under fixed root styling, keeping mounted geometry consistent with snapshot projection. Valid positive fractional saved sizes survive reflow, unrelated additions and ordinary nowrap moves; explicit resize minimums remain enforced. Custom drag handles bind after portal content appears and support updates, HTML/SVG button content and view/edit changes while preserving custom resize controls and widget identity.

Validation of final 6c00f26 on Node 22 and React 19: 240 Jest tests in 18 suites; all ten common callback bodies match preparation. Native browser checks passed 25 cases across Chromium/Firefox/WebKit, with two existing Chromium-CDP touch skips on Firefox/WebKit. Types, lint, styles/format, library and Storybook builds passed. The packed ESM/CJS/type artifact matches all 166 committed JS sourcemap sources and ships no tests or local evidence. DataLens passed 83 focused regressions plus both UI type programs against this exact local package on Node 24; temporary dependency changes were restored.

Fresh independent Codex sessions applied codebase-design, ponytail-review and review-pull-request. All confirmed findings were fixed and independently rechecked on final 6c00f26; no actionable findings remain. The last review includes independent parallel Standards and Spec passes on its review baseline, followed by revalidation of all affected candidates and final changes. All applicable final-head GitHub CI checks are green.

Existing lint/Storybook warnings remain; full lint reports 76 pre-existing warnings and no new sites. React 18 CI is release-only; other React peer versions were not separately revalidated here. Actual DataLens latency and PDF/export acceptance remain pending, and consumers require a released dependency version.

[gravity-ui-bot]

Preview is ready.