fix(core): separate blocks with newlines in getSelectedText - #3210

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/upload-artifact@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

packages/react/src/hooks/usePrefersColorScheme.ts:34:7: Calling setState synchronously within an effect can trigger cascading renders

packages/xl-ai/src/components/AIMenu/AIMenu.tsx:86:7: Calling setState synchronously within an effect can trigger cascading renders

tests/src/end-to-end/sidemenu/sideMenuHover.test.tsx:73:3: This value cannot be modified

tests/src/end-to-end/sidemenu/sideMenuHover.test.tsx:1062:7: Cannot reassign variables declared outside of the component/hook

tests/src/end-to-end/toggleblocks/toggleblocks.test.tsx:46:3: Cannot reassign variables declared outside of the component/hook

tests/src/end-to-end/sidemenu/overlappingEditors.test.tsx:31:3: This value cannot be modified

tests/src/end-to-end/slashmenu/suggestionMenuScroll.test.tsx:16:3: Cannot reassign variables declared outside of the component/hook

tests/src/end-to-end/slashmenu/suggestionMenuPlacement.test.tsx:26:3: Cannot reassign variables declared outside of the component/hook

tests/src/unit/react/reactFrame.test.tsx:76:8: Cannot access refs during render

tests/src/unit/react/reactFrame.test.tsx:76:8: Cannot access refs during render

{ "workflowData": { "owner": "TypeCellOS", "repo": "BlockNote", "sha": "4ba1ec19893040c20fd43a8b2a22155a47b29598", "ref": "3210", "headBranch": null }, "key": "jHQ8dSVF8X", "runId": 40516856836, "webhookDebug": { "action": "requested", "head_branch": "fix/710-selected-text-block-separator", "head_repository_full_name": "adarshsm/BlockNote", "full_name": "TypeCellOS/BlockNote", "isPullRequest": true, "prNumber": 3210, "prNumberType": "number", "isNewPullRequest": true, "isOldPullRequest": false, "prKey": "adarshsm/BlockNote:fix/710-selected-text-block-separator", "oldPrDataHash": "zj3QFTRRJb", "lookupKey": "adarshsm/BlockNote:fix/710-selected-text-block-separator", "data": { "owner": "TypeCellOS", "repo": "BlockNote", "sha": "4ba1ec19893040c20fd43a8b2a22155a47b29598", "ref": "3210", "headBranch": null } }, "currentCursor": { "sha": "b91981c5d1aa9c78718bf54aedbe5a5647444c56", "timestamp": 39003446446 }, "pkgPrNewVersion": "0.0.92" }