Visual glitch: Focus outline border clipping in suggestion/completion widget

Does this issue occur when all extensions are disabled?: Yes/No

- VS Code Version: 1.134.0
- OS Version: MacOS Tahoe 26.2

**Steps to Reproduce:**

1. Open any code file in editor.
2. Trigger autocomplete / suggestion list (e.g., auto-complete widget popover).
3. Observe the blue outline border around the selected completion item

**Description:**
The focus/selection outline (blue border) on the code completion/suggestion widget does not render correctly around the rounded corners. Specifically, the top-right corner of the blue border appears clipped or disconnected from the container's outer border.

**Screenshots:**

Overview:

Zoomed-in Detail:

**Expected Result:**
The blue focus border should cleanly follow the rounded container corners uniformly without clipping or gaps.

**Actual Result:**
The blue outline is cut off / misaligned at the rounded corner (top-right), creating a visually broken border effect.