* fix: reliably kill shell process tree on Windows timeout
Fixes#8809
* fix: remove redundant import and wrap taskkill in try/except
- Remove 'import subprocess as _sp' (subprocess already imported at top)
- Use subprocess.run directly with DEVNULL for stdout/stderr
- Wrap taskkill in try/except to avoid masking original TimeoutExpired
- If taskkill fails, cleanup failures don't prevent proc.wait() or re-raise
https://buymeacoffee.com/muhamedfazalps
* style: apply ruff formatting to local.py
* test: fix shell component tests to match Popen-based implementation
The tests were monkeypatching subprocess.run but the implementation
now uses subprocess.Popen + communicate() for timeout handling.
Updated tests to mock Popen instead.
Fixes CI Unit Tests failure
* fix: harden windows shell timeout cleanup
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Co-authored-by: Soulter <905617992@qq.com>
