Allow access to selected value in `submit` callback of `mp.input.select`

Expected behavior of the wanted feature

When items was changed in code(by swapping entry order etc), checking the selected value can be safer as it ignores the positions.
It can also reduce extra variable declaration if the selected value is needed in the submit action.

mp.input.select({
    items: ['foo', 'bar'],
    submit: function(id, value) {
        // switch on id can be error-prone when `items` is changed
        switch (id) {
            case 1:
            case 2:
        }
        // switch on value ignores the positional problem
        switch (value) {
            case 'foo':
            case 'bar':
        }
    }
})

Alternative behavior of the wanted feature

No response

Log File

No response

Sample Files

No response

Start by locating the mp.input.select entry point and tracing how arguments are assembled for its submit callback. Update the callback contract to expose the selected value independently of item position, then verify the example’s value-based handling and existing selection behavior.