Fix Ctrl-C behavior on Windows: clear input then exit, disable mouse tracking#7

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Copilot wants to merge 7 commits intodevfrom

copilot/fix-terminal-garbage-on-close

Commits on Jan 24, 2026

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Add SIGINT/SIGTERM handlers to ensure terminal cleanup on Windows

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tnglemongrass
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Fix SIGINT handler to clear input before exit on Windows

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Address code review feedback - simplify nested property access

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Co-authored-by: tnglemongrass <113173292+tnglemongrass@users.noreply.github.com>
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Add minimal SIGINT handler to ensure terminal cleanup

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tnglemongrass
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Prevent SIGINT from killing process, let keyboard handlers work

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tnglemongrass
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