Safari DAG Backfills

### Apache Airflow version

3.0.2

### If "Other Airflow 2 version" selected, which one?

_No response_

### What happened?

(reporting on behalf of someone else)
Airflow 3 is unable to do backfills in Safari

The dates were auto-selected however the
"2 runs will be backfilled" type of message never appeared and the button did not enable itself to submit the backfill

### What you think should happen instead?

_No response_

### How to reproduce

- Astro CLI
- Safari
- Airflow 3
- Do a DAG Backfill

### Operating System

Astro

### Versions of Apache Airflow Providers

_No response_

### Deployment

Astronomer

### Deployment details

_No response_

### Anything else?

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

Reproduce a DAG backfill in Airflow 3.0.2 using Safari and the reported Astro deployment details. Check why the selected dates do not show the run-count message or enable the submit button; done means the backfill can be submitted successfully in Safari.

Written by the indexing model from the issue text.