Difficulty selecting the lowest value in the range widget

### Expected Behaviour

It should be easy to click on whichever value you want.

### Observed Behaviour

You have to be very accurate when clicking at the low end of the slider or it doesn't change.

### Reproduction Steps

Form (XML or XLSX file): https://github.com/getodk/web-forms/blob/c5764e8ed7780a4959f6f70b885eca4946b2834f/packages/common/src/fixtures/controls/range-controls.xml

### Screenshots or Videos

https://github.com/user-attachments/assets/714abbc1-ef48-4317-9fd8-4afef6cb40d8

### Environment

- Browser version: Firefox, Chrome
- OS:
- Web Forms version:

### Additional Context

The workaround is to drag the slider handle all the way to the start which works reliably.

- Noticed in this issue: https://github.com/getodk/web-forms/issues/777#issuecomment-4374870790
- Also in this PR review: https://github.com/getodk/web-forms/pull/800#discussion_r3190070316
- And related to this PrimeVue issue: https://github.com/primefaces/primevue/issues/7609#issuecomment-4374838034

Start with packages/common/src/fixtures/controls/range-controls.xml and reproduce the issue in Firefox or Chrome, comparing clicks near the slider's low end with dragging the handle to the start. Trace the range widget used by that fixture and verify that clicking the lowest value changes it reliably without requiring a drag.

Written by the indexing model from the issue text.