Editor freezes and RenderTexture errors are thrown when large Blur value is entered in UI Builder Filter

Steps to reproduce:

1. Create a new project using Universal 3D template
2. Go to Assets > Create > UI Toolkit > UI Document (UXML)
3. Open the created UI Document in UI Builder 
4. Add a Visual Element to the UI Builder Hierarchy
5. In the Inspector, expand the Filter foldout
6. Click "+" and choose "Blur"
7. In the Value field enter "10000"
8. Observe the Editor

Actual results: The whole Editor starts freezing after 4th digit is entered and "RenderTexture.Create failed: requested size ..." and "Failed to set the active render target, ensure that it is a valid render target."  errors and warnings are thrown

Expected results: Value field should enforce sensible min/max limits to prevent freeze and instability

Reproducible with versions: 6000.3.8f1, 6000.4.0b8, 6000.5.0a6

Can’t test with versions: 6000.0.66f1 (no filters option)

Tested on (OS): Ubuntu 24.04, Windows 11, macOS 26.2

Notes:

• On Linux, not only the Editor froze, but the whole machine froze showing artifacts all over the monitor (not only on Unity; see attached video)