default hide subflows toggled to true on dashboard & run pages

[DSCmatter]

This PR changes the default state of the "Hide subflows" filter from false to true on both the Dashboard and the Runs list pages. This reduces visual noise by default for users with complex workflows containing many nested subflows, while still allowing them to manually toggle the switch when they want to inspect them.

Checklist

• This pull request references any related issue by including "closes "

  • Closes keeping hide subflow On as default #22454

• If this is a complex change, a maintainer has confirmed the proposed approach on the linked issue.

  • This is a minor usability enhancement changing default values.

• If this pull request adds or changes functionality, it includes tests or explains why tests are not needed.

  • Added a new unit test in dashboard.test.tsx verifying that the toggle is checked by default on dashboard load. Updated existing Playwright E2E tests (dashboard.spec.ts and runs-flow-runs.spec.ts) to match the new defaults.

• If this pull request changes user-facing behavior, it updates documentation or explains why documentation is not needed.

  • This updates UI filter defaults; no documentation changes are required.

• If this pull request removes docs files, it includes redirect settings in mint.json.

  • No documentation files were deleted.

• If this pull request adds functions or classes, it includes helpful docstrings.

  • No new functions or classes were added.

[DSCmatter]

Hi, It's marked as a draft only because I've hit the open PR limit. Could a maintainer please mark it as "Ready for review" when convenient? Thanks

[desertaxle]

Thanks for the PR @DSCmatter! I'd prefer to solve the linked issue by saving the user's choice of whether to hide or show subflows in the browser so that it persists across sessions rather than changing the default for all users.