# M-Pesa Match Payer Button Fix

## Problem
The "Match Payer" button in the M-Pesa callbacks page (https://branchbusinessadvance.co.ke/payments/callbacks/) was not functional - clicking it did nothing.

## Root Cause
The application was using Bootstrap 5 CSS but had NO Bootstrap JavaScript loaded. The modal buttons were using Bootstrap 4 syntax (`data-toggle`, `data-target`, `data-dismiss`) which doesn't work in Bootstrap 5.

## What Was Fixed

### 1. Added Bootstrap JavaScript to base.html
Added the Bootstrap 5 bundle (includes Popper.js) before the closing `</body>` tag:
```html
<!-- Bootstrap Bundle with Popper -->
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
```

### 2. Updated Modal Syntax in callbacks.html
Changed all Bootstrap 4 modal attributes to Bootstrap 5 syntax:

**Bootstrap 4 (OLD):**
- `data-toggle="modal"` 
- `data-target="#modalId"`
- `data-dismiss="modal"`
- `<button class="close">` with `<span>&times;</span>`

**Bootstrap 5 (NEW):**
- `data-bs-toggle="modal"`
- `data-bs-target="#modalId"`
- `data-bs-dismiss="modal"`
- `<button class="btn-close">`

### Changes Made:
1. Match Payer button - Updated to use `data-bs-toggle` and `data-bs-target`
2. View Details button - Updated to use `data-bs-toggle` and `data-bs-target`
3. All modal close buttons - Changed from `class="close"` to `class="btn-close"`
4. All dismiss buttons - Changed `data-dismiss` to `data-bs-dismiss`

## Files Modified
1. `templates/base.html` - Added Bootstrap JS
2. `templates/payments/callbacks.html` - Updated all modal syntax

## Testing
After deploying these changes:
1. Go to https://branchbusinessadvance.co.ke/payments/callbacks/
2. Find a transaction without a matched borrower
3. Click the "Match Payer" button
4. The modal should now open properly
5. Select a borrower and click "Match & Process Payment"
6. The payment should be matched and processed

## Why This Happened
The Bootstrap CSS was upgraded to version 5.3.0, but:
- The JavaScript was never added
- The template syntax was never updated from Bootstrap 4 to Bootstrap 5

Bootstrap 5 has breaking changes from Bootstrap 4, including:
- All data attributes now use `data-bs-*` prefix instead of `data-*`
- Close buttons use `btn-close` class instead of `close` class
- Requires Bootstrap JS to be loaded for modals to work

## Additional Notes
This fix also applies to all other modals in the application. If you find other non-functional modals, check if they're using the old Bootstrap 4 syntax and update them to Bootstrap 5.