Cannot partially select text with mouse drag inside value fields

[Vishal27alpha]

I found inconsistent mouse selection behavior inside structured value fields.

In normal text paragraphs, I can drag the mouse to select part of the text. But inside a value field, mouse drag selects the whole paragraph/block instead of only the dragged text.

Steps to reproduce:

1.Place the cursor inside text contained in a value field.
2.Confirm the context with Focus > Describe, which shows value.
3.Try to drag-select only part of the text with the mouse.
4.Compare this with ordinary paragraph text, where partial selection works normally.

Expected behavior:
Mouse drag should allow partial text selection inside value fields, just like in normal paragraphs.

Actual behavior:
Dragging the mouse selects the entire paragraph/block instead of only the intended text range.