feat(seasonal): require manual seasonal membership number on creation

Seasonal memberships now require a manually entered temporary
membership number (رقم العضوية الموسمية) instead of using the
shared auto-increment sequence. The number is validated for
uniqueness and assigned to the member record immediately, so
the payment guard won't override it with an auto-generated one.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Modules/Seasonal/Controllers/SeasonalController.php

@@ -87,6 +87,23 @@ class SeasonalController extends Controller
         $data = $request->all();
         unset($data['_csrf_token']);
 
+        $seasonalNumber = trim((string) ($data['seasonal_number'] ?? ''));
+        if ($seasonalNumber === '') {
+            return $this->redirect("/members/{$memberId}/seasonal/create")->withError('رقم العضوية الموسمية مطلوب');
+        }
+
+        // Check uniqueness of seasonal number
+        $existingNumber = $db->selectOne("SELECT id FROM members WHERE membership_number = ? AND id != ?", [$seasonalNumber, (int) $memberId]);
+        if ($existingNumber) {
+            return $this->redirect("/members/{$memberId}/seasonal/create")->withError('رقم العضوية الموسمية مستخدم بالفعل');
+        }
+
+        // Assign the seasonal number to the member immediately
+        $db->update('members', [
+            'membership_number' => $seasonalNumber,
+            'updated_at'        => date('Y-m-d H:i:s'),
+        ], 'id = ?', [(int) $memberId]);
+
         $nationalityType = in_array($data['nationality_type'] ?? '', ['egyptian', 'foreign'], true)
             ? $data['nationality_type'] : 'egyptian';
         $durationMonths = (int) ($data['duration_months'] ?? 6);

app/Modules/Seasonal/Views/create.php

@@ -12,6 +12,11 @@
     <div class="card" style="padding:20px;margin-bottom:20px;">
         <h3 style="margin:0 0 15px;color:#0D7377;">1. نوع العضوية والمدة</h3>
         <div style="display:grid;grid-template-columns:1fr 1fr 1fr 1fr;gap:15px;">
+            <div class="form-group">
+                <label class="form-label">رقم العضوية الموسمية <span style="color:#DC2626;">*</span></label>
+                <input type="text" name="seasonal_number" class="form-input" required placeholder="أدخل رقم العضوية الموسمية" style="direction:ltr;text-align:left;">
+                <small style="color:#6B7280;font-size:11px;margin-top:3px;display:block;">رقم مؤقت خاص بالعضويات الموسمية</small>
+            </div>
             <div class="form-group">
                 <label class="form-label">نوع الجنسية <span style="color:#DC2626;">*</span></label>
                 <select name="nationality_type" id="nationalityType" class="form-select" required onchange="updatePricing()">