Fix history cleaning - disable history recording

Added 'set +o history' to prevent the trace eraser commands from being re-added to history.

Changes:
• Disable history recording before cleaning (set +o history)
• Clear in-memory history with history -c
• Write empty history with history -w
• Added note to run 'exec bash' for clean shell
• Prevents script commands from being saved

This ensures the last 10 entries are properly removed and the cleanup commands themselves don't get recorded.

tools/erase-toolkit-traces.sh

@@ -145,6 +145,9 @@ if [ "$CLEAN_HISTORY" = true ] && [ -f ~/.bash_history ]; then
     echo ""
     echo "→ Final cleanup: Removing bash history..."
 
+    # Disable history recording for this session to prevent re-adding commands
+    set +o history
+
     # Remove last 10 lines from history file (covers toolkit download/usage)
     total_lines=$(wc -l < ~/.bash_history)
     if [ "$total_lines" -gt 10 ]; then
@@ -157,12 +160,16 @@ if [ "$CLEAN_HISTORY" = true ] && [ -f ~/.bash_history ]; then
         echo "  ✓ Cleared entire history (had < 10 entries)"
     fi
 
-    # Clear in-memory history and write clean file
+    # Clear in-memory history completely
     history -c
+
+    # Write the empty history to file
     history -w
 
     echo ""
     echo "  ✓ Bash history cleaned"
+    echo ""
+    echo "NOTE: Run 'exec bash' or logout/login to start fresh shell with clean history."
 fi
 
 echo ""