Changes Made-

Added logic to handle non-negative pickup values and support "faux pickups" like 1/3.
Ensured notationPickup is called after setting the pickup value.

Validated the pickup value before passing it to MeterActions.setPickup to prevent errors.

Added input validation for pickup values in flow, ensuring only valid values are processed.

… better error handling

1. made the updatePluginObj code shorter and combined categories making it easier to maintain in the long term, also ensured that the structure exists

2. minor improvements in mixedNumber function