contributes to coder/internal#753

Summary

Fixes issue where multi-select parameters don't update their selected values when dynamic defaults change.

Changes

• Changed MultiSelectCombobox in DynamicParameter to use value prop instead of defaultOptions
• This ensures the component properly reacts to parameter value changes when other parameters trigger dynamic updates

Problem

When using dynamic parameters with multi-select form types, changing one parameter (like git_repo) that affects the defaults of another multi-select parameter (like ides) would not update the selected values in the UI. The form state would update correctly, but the UI would show stale selected options.

Root Cause

The MultiSelectCombobox component was using defaultOptions prop which only sets initial state. When the parent component updates the selected options due to dynamic parameter changes, the component wasn't reacting to these changes.

Solution

Using the value prop instead of defaultOptions makes the component controlled and reactive to parent state changes. The MultiSelectCombobox already has logic to handle value updates:

const [previousValue, setPreviousValue] = useState<Option[]>(value || []);
if (value && value !== previousValue) {
    setPreviousValue(value);
    setSelected(value);
}

Testing

This change maintains the same API and behavior for static parameters while fixing the dynamic update issue. The component will now properly update selected values when the parent provides new values.

Fixes coder/internal#753