# Attendance Delegation Approval Feature

We've successfully added the approval flow with a signature pad for the attendance delegation module.

## Changes Made

### 1. New Dependency
We've added `react-native-signature-canvas` to the frontend `ess_ebi` project. This library allows users to draw a signature natively or via a webview context, returning a clean Base64 image encoded string that's easily transported via API.

### 2. Backend API Endpoint
We added a new API route in `ess_api/ess_api/app/routes/delegation-routes.js` and a corresponding service function in `delegation-attendance-services.js`.
- **Endpoint**: `POST /api/delegations/attendance/approve`
- **Behavior**: It executes an `UPDATE` query on the `trx_multi_attendance` table to:
  - Set `status = 3`
  - Store the base64 signature string in the `sign_image_delegate` column.
  - Set `time_stamp_delegate = NOW()`.

### 3. Frontend Approval Flow
In `ListAttendanceDelegation.js`, the "Approve" button now triggers the new `Modal` that contains the `SignatureScreen`. 
- Users are required to draw their signature.
- If they attempt to save an empty signature, they receive a warning prompt to "Please provide a signature first."
- Upon successful signing, the `handleSignature` function is called, which connects to the new API endpoint, passing the ID, NIK, and Base64 string.
- Upon a successful response, the interface alerts the user and refreshes the history list.

## Validation Results
- Code formatting and styles conform to existing application standards (using predefined HOKBEN UI colors like `COLORS.yellowhokben` and `COLORS.black`).
- State variables correctly capture and track the selected delegation item for approval.
- Data structures align properly with existing `trx_multi_attendance` database architecture schema.

## Next Steps
You can now test this feature directly from the HOKBEN ESS mobile app by clicking "Approve" on any pending attendance delegation item. The popup should appear allowing you to draw and save the signature!