Feature/cursor pagination task instances UI

[pierrejeambrun]

Replace offset-based pagination with cursor-based pagination for the TaskInstances listing page, leveraging the new cursor API endpoint. Pagination now shows only previous/next buttons without page numbers or total count, which eliminates the expensive COUNT(*) query for large datasets.

Add generic cursor pagination support to DataTable via an optional cursorPagination prop so other tables can adopt it.

Building on top of #64845 to plug the UI on this new cursor based pagination. Default table view is much faster.

Responses are much faster. Currenrly it would take ~60 on main to load.

After

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[pierrejeambrun]

Merge backend first.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds cursor-based pagination for TaskInstances to avoid expensive COUNT(*) queries and speeds up the default listing UI, while keeping offset pagination for existing endpoints/actions.

Changes:

• Introduces cursor pagination helpers + API support (cursor, next_cursor, previous_cursor) and response model discrimination via pagination.
• Updates TaskInstances UI to use cursor pagination and extends DataTable with an optional cursorPagination control.
• Regenerates OpenAPI client types/services and updates unit tests for the new pagination mode.

Reviewed changes

Copilot reviewed 30 out of 30 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
airflow-ctl/src/airflowctl/api/datamodels/generated.py	Adds separate cursor/offset task instance collection response models in generated client datamodels.
airflow-core/tests/unit/api_fastapi/core_api/routes/public/test_task_instances.py	Adds cursor pagination tests and updates existing assertions to include pagination: "offset".
airflow-core/tests/unit/api_fastapi/common/test_parameters.py	Reformats imports to multi-line for readability.
airflow-core/tests/unit/api_fastapi/common/test_cursors.py	Adds unit tests for cursor encode/decode and keyset filter behavior.
airflow-core/src/airflow/ui/src/queries/useClearTaskInstances.ts	Updates types to use the offset response model for clear operations.
airflow-core/src/airflow/ui/src/queries/useClearDagRunDryRun.ts	Updates dry-run clear typing to offset response model.
airflow-core/src/airflow/ui/src/queries/useBulkMarkAsDryRun.ts	Updates response typing and EMPTY constant to offset model.
airflow-core/src/airflow/ui/src/queries/useBulkClearDryRun.ts	Updates response typing and EMPTY constant to offset model.
airflow-core/src/airflow/ui/src/pages/TaskInstances/TaskInstances.tsx	Switches listing to cursor pagination and wires next/previous into DataTable.
airflow-core/src/airflow/ui/src/pages/Task/Overview/Overview.tsx	Makes failed-task count robust to unioned cursor/offset responses.
airflow-core/src/airflow/ui/src/pages/Dag/Overview/Overview.tsx	Makes failed-task count robust to unioned cursor/offset responses.
airflow-core/src/airflow/ui/src/pages/Dag/Overview/FailedLogs.tsx	Broadens prop type to accept unioned task instance listing response.
airflow-core/src/airflow/ui/src/components/DataTable/index.ts	Re-exports cursor pagination prop type.
airflow-core/src/airflow/ui/src/components/DataTable/DataTable.tsx	Adds cursorPagination support with prev/next icon buttons and hides total row count in cursor mode.
airflow-core/src/airflow/ui/src/components/ActionAccordion/ActionAccordion.tsx	Updates affected tasks typing to offset response model.
airflow-core/src/airflow/ui/openapi-gen/requests/types.gen.ts	Introduces cursor/offset response types and unions GetTaskInstancesResponse.
airflow-core/src/airflow/ui/openapi-gen/requests/services.gen.ts	Adds cursor query param and updates docs/return types for updated task instance endpoints.
airflow-core/src/airflow/ui/openapi-gen/requests/schemas.gen.ts	Adds OpenAPI schemas for cursor/offset collection responses.
airflow-core/src/airflow/ui/openapi-gen/queries/suspense.ts	Updates generated query hook typing/docs for task instance endpoints with cursor support.
airflow-core/src/airflow/ui/openapi-gen/queries/queries.ts	Updates generated query hook typing/docs for task instance endpoints with cursor support.
airflow-core/src/airflow/ui/openapi-gen/queries/prefetch.ts	Updates generated prefetch helpers for task instance endpoints with cursor support.
airflow-core/src/airflow/ui/openapi-gen/queries/ensureQueryData.ts	Updates generated ensureQueryData helpers for task instance endpoints with cursor support.
airflow-core/src/airflow/ui/openapi-gen/queries/common.ts	Includes cursor in task instance query keys for cache separation.
airflow-core/src/airflow/api_fastapi/core_api/routes/public/task_instances.py	Implements cursor pagination path and returns discriminated cursor/offset response models.
airflow-core/src/airflow/api_fastapi/core_api/routes/public/dag_run.py	Updates clear DAG run response to offset pagination model.
airflow-core/src/airflow/api_fastapi/core_api/openapi/v2-rest-api-generated.yaml	Adds cursor query param + oneOf cursor/offset response schema with discriminator mapping.
airflow-core/src/airflow/api_fastapi/core_api/datamodels/task_instances.py	Splits cursor/offset responses and defines discriminated union response type.
airflow-core/src/airflow/api_fastapi/core_api/datamodels/common.py	Adds base models for offset/cursor paginated responses.
airflow-core/src/airflow/api_fastapi/common/parameters.py	Adds cached resolution to SortParam and exposes resolved columns for cursor encoding/filtering.
airflow-core/src/airflow/api_fastapi/common/cursors.py	Adds cursor token encoding/decoding and keyset WHERE clause builder.