[v19]: TreeSelect missing Styles for IconField and InputIcon

[0x426]

Describe the bug

Styles are missing for the TreeSelect component if applied with the filtering option.

For whatever reason, the inner components of the TreeSelect (InputText and SearchIcon) seem to have been removed if I compare the v18.0.0 and v19.0.0-rc.1 (search in the changed files for "treeselect"):

• 18.0.0...19.0.0-rc.1

Environment

Stackblitz

Reproducer

https://stackblitz.com/edit/github-sa75g5ld?file=src%2Fapp%2Fapp.component.html

Angular version

19.0.4

PrimeNG version

19.0.0-rc.1

Build / Runtime

Angular CLI App

Language

TypeScript

Node version (for AoT issues node --version)

v22.9.0

Browser(s)

No response

Steps to reproduce the behavior

1. Open the TreeSelect
2. Styles are broken (Icon not in input, etc.)

Expected behavior

Elements are properly styled.

[rd-david-steglich]

The bug is also in the final release v19 and on the demo page.

[mertsincan]

Fixed for 18.0.2 and 19.0.1