Shell Command Error Handling Improvements

What: Shell command parsing now uses error-safe wrapper functions that gracefully handle malformed commands instead of throwing exceptions.

Details:

• New vC() function at line 348215 wraps parse operations with try-catch
• New q8() function at line 348265 provides unified quoting with fallback strategies
• New NX9() function at line 348229 handles quote operations with error checking
• Commands with syntax errors now fail gracefully rather than crashing
• Improved handling of complex shell redirections and pipes
• Evidence: vC(), NX9(), and q8() functions at lines 348215, 348229, and 348265