Use same grep logic as trace eraser for history cleaning

Simplified to match the exact logic from erase-toolkit-traces.sh:
- Use grep -Ev with pattern matching
- Clean file, clear history, reload, unset HISTFILE
- Then run trace eraser subprocess for logs/files/directory

The key fix is running this in the current shell instead of subprocess.

launcher.sh

@@ -1511,7 +1511,7 @@ main() {
                     # This ensures the parent shell's history is cleaned
                     GREP_PATTERN="git\.mull\.lol|linux-server-management-toolkit|server-toolkit|launcher\.sh|erase-toolkit-traces"
 
-                    # Clean the history file
+                    # Clean the history file (same logic as trace eraser)
                     if [ -f ~/.bash_history ]; then
                         cp ~/.bash_history ~/.bash_history.bak.$$
                         grep -Ev "$GREP_PATTERN" ~/.bash_history.bak.$$ > ~/.bash_history 2>/dev/null || true