fix(transfers): lock qualification on separation form to the one chosen at fee calculation

The qualification (مؤهل) chosen during separation fee calculation is now
locked in the form fill step — it cannot be changed. This ensures the new
member gets the correct qualification_id, and all dependent fee calculations
(children, spouses) use the full price of that qualification.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Modules/Transfers/Controllers/TransferController.php

@@ -532,10 +532,20 @@ class TransferController extends Controller
         $child = $transfer['child_id'] ? $db->selectOne("SELECT * FROM children WHERE id = ?", [(int) $transfer['child_id']]) : null;
         $sourceMember = $db->selectOne("SELECT * FROM members WHERE id = ?", [(int) $transfer['source_member_id']]);
 
+        // Resolve the locked qualification from the transfer request
+        $lockedQualification = null;
+        if (!empty($transfer['qualification_code'])) {
+            $lockedQualification = $db->selectOne(
+                "SELECT id, code, name_ar FROM qualifications WHERE code = ? AND is_active = 1",
+                [$transfer['qualification_code']]
+            );
+        }
+
         return $this->view('Transfers.Views.form_fill', [
             'transfer'            => $transfer,
             'child'               => $child,
             'sourceMember'        => $sourceMember,
+            'lockedQualification' => $lockedQualification,
             'qualifications'      => $db->select("SELECT id, name_ar FROM qualifications WHERE is_active = 1 ORDER BY sort_order"),
         ]);
     }
@@ -551,6 +561,17 @@ class TransferController extends Controller
         $data = $request->all();
         unset($data['_csrf_token']);
 
+        // Force qualification from transfer request (locked at fee calculation time)
+        if (!empty($transfer['qualification_code'])) {
+            $lockedQual = $db->selectOne(
+                "SELECT id FROM qualifications WHERE code = ? AND is_active = 1",
+                [$transfer['qualification_code']]
+            );
+            if ($lockedQual) {
+                $data['qualification_id'] = (string) $lockedQual['id'];
+            }
+        }
+
         $nid = trim((string) ($data['national_id'] ?? ''));
         if ($nid !== '' && strlen($nid) === 14) {
             $parsed = NationalIdParser::parse($nid);

app/Modules/Transfers/Views/form_fill.php

@@ -66,12 +66,18 @@
             </div>
             <div class="form-group">
                 <label class="form-label">المؤهل <span style="color:#DC2626;">*</span></label>
+                <?php if (!empty($lockedQualification)): ?>
+                <input type="text" value="<?= e($lockedQualification['name_ar']) ?>" class="form-input" readonly style="background:#ECFDF5;font-weight:700;color:#059669;border-color:#059669;">
+                <input type="hidden" name="qualification_id" value="<?= (int) $lockedQualification['id'] ?>">
+                <small style="color:#059669;margin-top:4px;display:block;">تم تحديد المؤهل عند حساب رسوم الفصل — لا يمكن تغييره</small>
+                <?php else: ?>
                 <select name="qualification_id" class="form-select" required>
                     <option value="">-- اختر المؤهل --</option>
                     <?php foreach ($qualifications as $q): ?>
                     <option value="<?= (int) $q['id'] ?>"><?= e($q['name_ar']) ?></option>
                     <?php endforeach; ?>
                 </select>
+                <?php endif; ?>
             </div>
         </div>
     </div>