[shivaam]

Summary

Adds an exact-match Dag ID filter to the Assets page, allowing users to find Assets related to a specific Dag using the existing filter-pill UI and Assets API.

Related to #53052.

Changes

• Adds Dag ID to the existing Assets filter menu.
• Passes the selected ID to the existing Assets API.
• Stores the selection in the URL for sharing and reload persistence.
• Keeps existing filter-pill values synchronized with browser Back/Forward navigation.
• Ignores empty Dag IDs and preserves existing pagination-reset behavior.

Scope

This addresses the Dag relationship-filtering part of #53052, not the entire issue.

The existing API includes Assets that schedule the selected Dag, are produced by its tasks, or are consumed by its tasks. This filter combines those relationships; it does not provide separate Consuming Dag or Producing Task selectors.

Demo

download.mp4

Demonstrates Dag ID filtering, reload persistence, browser Back/Forward synchronization, and resetting filters.

Testing

• Focused FilterBar and AssetsList tests: 21 passed.
• Prettier, focused ESLint, TypeScript, and pre-commit hooks passed.
• Verified in the local Airflow UI: filtering, empty/nonexistent IDs, reload, Back/Forward, clearing/reset, pagination reset, combinations with existing name/group filters, and returning from Asset details.

The full manual-stage hook run was not completed.

AI disclosure

• Generative AI tooling was used to co-author this PR.

Generated-by: OpenAI Codex (GPT-5.6), following the Airflow contribution guidelines.

[bbovenzi]

Let's just fix the merge conflicts