Add history reload after file cleaning to prevent re-adding

Changes:
- Add history -c && history -r after cleaning file
- Reloads cleaned history into current session
- Prevents bash from appending dirty history on shell exit

Issue:
- Trace eraser cleaned file but current session kept dirty history
- On shell exit, bash appended current session to file
- All curl commands were re-added to ~/.bash_history

Solution:
- After cleaning file, clear and reload current session history
- Current session now has only cleaned history
- On exit, only clean commands are appended

Tested:
✓ File cleaned with grep -Ev
✓ Current session reloaded from cleaned file

tools/erase-toolkit-traces.sh

@@ -167,11 +167,15 @@ if [ "$CLEAN_HISTORY" = true ] && [ -f ~/.bash_history ]; then
         echo "  ✓ History file cleaned"
     fi
 
+    # Reload cleaned history into current session to prevent re-adding on exit
+    echo "  → Reloading cleaned history into current session..."
+    history -c
+    history -r
+
     echo "  ✓ In-memory history reloaded from cleaned file"
     echo ""
-    echo "NOTE: Other active terminal sessions may still have old history in memory."
+    echo "NOTE: For complete cleanup, run 'exec bash' to start a fresh shell."
-    echo "      Run 'exec bash' or 'history -c && history -r' in those terminals,"
+    echo "      This prevents any lingering history from being re-saved."
-    echo "      or simply logout/login to start completely fresh."
 fi
 
 # Offer to remove the entire toolkit (AFTER history cleaning)