Fix Terminal Focus Issues on Windows

Problem

Users reported that when switching between editor tabs, the integrated terminal would lose focus unexpectedly, requiring them to click on it again to continue typing. This affected productivity, especially for developers who frequently switch between code and terminal.

Solution

Investigated the focus management logic in the terminal component and discovered a race condition in the event handler. Implemented a debounced focus restoration mechanism that correctly handles rapid tab switches.

Changes Made

• Modified src/vs/workbench/contrib/terminal/browser/terminalView.ts
• Added focus state tracking
• Implemented debounced focus restoration
• Added unit tests for the new behavior

Impact

• Improved developer experience for Windows users
• Reduced unnecessary clicks and interruptions
• More stable terminal behavior during rapid context switches

Pull Request

#145821 - Merged on January 20, 2026