fix(archive): show 0 remaining for completed installment plans instead of stale balance

remaining_balance is set at plan creation and never updated. For completed
plans, display "0.00 (مكتمل)" in green instead of the misleading original balance.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Modules/Members/Views/archive_show.php

@@ -243,7 +243,7 @@ krsort($groupedSubs);
             <table style="width:100%;font-size:13px;">
                 <tr><td style="color:#6B7280;width:35%;">إجمالي المبلغ</td><td style="font-weight:600;"><?= money($plan['total_amount'] ?? '0') ?></td></tr>
                 <tr><td style="color:#6B7280;">المقدم</td><td><?= money($plan['down_payment'] ?? '0') ?></td></tr>
-                <tr><td style="color:#6B7280;">المتبقي</td><td style="color:#DC2626;font-weight:600;"><?= money($plan['remaining_balance'] ?? '0') ?></td></tr>
+                <tr><td style="color:#6B7280;">المتبقي</td><td style="color:<?= ($plan['status'] ?? '') === 'completed' ? '#059669' : '#DC2626' ?>;font-weight:600;"><?= ($plan['status'] ?? '') === 'completed' ? '0.00 ج.م (مكتمل)' : money($plan['remaining_balance'] ?? '0') ?></td></tr>
                 <tr><td style="color:#6B7280;">عدد الأشهر</td><td><?= (int) ($plan['number_of_months'] ?? 0) ?></td></tr>
                 <tr><td style="color:#6B7280;">القسط الشهري</td><td><?= money($plan['monthly_payment'] ?? '0') ?></td></tr>
                 <tr><td style="color:#6B7280;">تاريخ البدء</td><td><?= e($plan['start_date'] ?? '—') ?></td></tr>