Sandbox output panel disappears when resize handle is dragged fully down and have to refresh the page to get it back #2211
Description
Describe the Bug
When using the resizable splitter in the Pyrefly Sandbox, dragging the resize handle all the way down causes the output panel ("Type Checking Errors" / "Runtime Output" tabs) to completely disappear. Once hidden, there's no way to bring it back without refreshing the page.
Steps to reproduce:
- Go to https://pyrefly.org/sandbox/
- Locate the resize handle (the horizontal bar between the code editor and the output panel)
- Drag the resize handle all the way down to the bottom of the screen
- The output panel disappears completely and cannot be recovered
CleanShot.2026-01-23.at.22.36.56.mp4
Expected behavior:
The resize handle should stop at a minimum height that keeps the output panel visible and draggable.
CleanShot.2026-01-23.at.23.53.07.mp4
Root cause:
The sandbox container had no fixed height constraint (flex: 1 only), allowing it to grow infinitely as the user dragged down. The clamping logic couldn't enforce minimum heights because the container kept expanding.
Sandbox Link
No response
(Only applicable for extension issues) IDE Information
No response