Added functionality to display the current signature index in the
signature counter UI in `EnvelopeViewer.razor`, including a new
state variable `_currentSignatureIndex` to track the currently
viewed signature. Updated the logic to fetch and set this value
from the `SignatureNavState` object provided by the JavaScript
runtime.
Modified `pdf-viewer.js` to calculate the current signature index
based on the last viewed signature ID (`_lastViewedSignatureId`)
and return it as part of the `SignatureNavState`. This replaces
the previously hardcoded `signed` value.
These changes improve the user experience by providing a clear
indication of the currently viewed signature in the navigation UI.
TekH
656fc97e74