Sidebar textbox does not respect editor.roundedSelection setting

[eritbh]

Type: Bug

1. Start VS Code with extensions disabled in an existing Git folder (e.g. code --disable-extensions src/some/folder)
2. Disable the editor.roundedSelection setting
3. Open the source control panel in the sidebar and start typing a commit message
4. Select some of the typed text

Expected behavior: Selection region does not have rounded corners, because the setting is disabled.

Actual behavior: Selection corners are rounded despite setting.

VS Code version: Code 1.109.5 (0725862, 2026-02-19T19:43:32.382Z)
OS version: Linux x64 6.19.2-200.nobara.fc43.x86_64
Modes:

System Info

Item	Value
CPUs	AMD Ryzen 5 5600X 6-Core Processor (12 x 4641)
GPU Status	2d_canvas: enabled GPU0: VENDOR= 0x10de [Google Inc. (NVIDIA Corporation)], DEVICE=0x21c4 [ANGLE (NVIDIA Corporation, NVIDIA GeForce GTX 1660 SUPER/PCIe/SSE2, OpenGL ES 3.2 NVIDIA 580.126.09)], DRIVER_VENDOR=NVIDIA, DRIVER_VERSION=580.126.09 ACTIVE Machine model name: Machine model version: direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_graphite: disabled_off trees_in_viz: disabled_off video_decode: enabled video_encode: disabled_software vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off webnn: disabled_off
Load (avg)	1, 1, 1
Memory (System)	31.26GB (23.04GB free)
Process Argv	--disable-extensions src/github.com/eritbh/eritbh-theme --crash-reporter-id 8ebde768-34ee-4edf-bb9b-b5aafbbb7c48
Screen Reader	no
VM	0%
DESKTOP_SESSION	plasma
XDG_CURRENT_DESKTOP	KDE
XDG_SESSION_DESKTOP	KDE
XDG_SESSION_TYPE	wayland

Extensions disabled