feat(pricing): Sheraton 2026 offers + above_medium qualification + fix show.php crash

- Add board offer "عروض عضويات شيراتون 2026" with 4 tiers (cash 10%, 24mo 0%, 40mo 15%, 60mo 15%)
- Add "فوق المتوسط" qualification at 187,500 EGP
- Fix crash in show.php: board_offers uses title_ar not name_ar
- Rewrite discounts tutorial with full regulatory discount coverage
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/Modules/Members/Views/show.php

@@ -485,7 +485,7 @@ $_memberInitials = mb_substr($member->full_name_ar, 0, 2);
                 <div style="font-size:12px;color:#374151;">
                     <strong>العروض المتاحة:</strong>
                     <?php foreach ($boardOffers as $bo): ?>
-                    <span style="background:#EDE9FE;padding:2px 8px;border-radius:4px;margin:0 2px;"><?= e($bo['name_ar']) ?></span>
+                    <span style="background:#EDE9FE;padding:2px 8px;border-radius:4px;margin:0 2px;"><?= e($bo['title_ar']) ?></span>
                     <?php endforeach; ?>
                 </div>
                 <?php else: ?>

database/seeds/Phase_100_002_seed_sheraton_offers_2026.php

+<?php
+declare(strict_types=1);
+
+use App\Core\Database;
+
+return function (Database $db): void {
+    $ts = date('Y-m-d H:i:s');
+
+    // ─── 1. Add "above_medium" qualification if missing ───
+    $aboveMedium = $db->selectOne("SELECT id FROM qualifications WHERE code = 'above_medium'");
+    if (!$aboveMedium) {
+        $db->insert('qualifications', [
+            'code'       => 'above_medium',
+            'name_ar'    => 'مؤهل فوق المتوسط',
+            'name_en'    => 'Above Medium Qualification',
+            'sort_order' => 2,
+            'is_active'  => 1,
+        ]);
+        // Push medium and none down
+        $db->query("UPDATE qualifications SET sort_order = 3 WHERE code = 'medium'", []);
+        $db->query("UPDATE qualifications SET sort_order = 4 WHERE code = 'none'", []);
+    }
+
+    // ─── 2. Add pricing config for above_medium (187,500) ───
+    $aboveMediumId = (int) ($db->selectOne("SELECT id FROM qualifications WHERE code = 'above_medium'")['id'] ?? 0);
+    if ($aboveMediumId > 0) {
+        $branches = $db->select("SELECT id, branch_code FROM branches WHERE is_active = 1");
+        foreach ($branches as $branch) {
+            $existing = $db->selectOne(
+                "SELECT id FROM pricing_configs WHERE branch_id = ? AND qualification_id = ? AND effective_from = '2024-07-01' AND membership_type = 'working'",
+                [(int) $branch['id'], $aboveMediumId]
+            );
+            if (!$existing) {
+                $db->insert('pricing_configs', [
+                    'branch_id'        => (int) $branch['id'],
+                    'qualification_id' => $aboveMediumId,
+                    'membership_type'  => 'working',
+                    'price'            => '187500.00',
+                    'currency'         => 'EGP',
+                    'effective_from'   => '2024-07-01',
+                    'effective_to'     => null,
+                    'is_active'        => 1,
+                    'created_at'       => $ts,
+                    'updated_at'       => $ts,
+                ]);
+            }
+        }
+    }
+
+    // ─── 3. Create Board Offer: "عروض عضويات شيراتون 2026" ───
+    $existingOffer = $db->selectOne(
+        "SELECT id FROM board_offers WHERE title_ar = 'عروض عضويات شيراتون 2026'"
+    );
+
+    if ($existingOffer) {
+        return;
+    }
+
+    $offerId = $db->insert('board_offers', [
+        'title_ar'              => 'عروض عضويات شيراتون 2026',
+        'title_en'              => 'Sheraton Membership Offers 2026',
+        'description'           => 'عروض الدفع للعضويات — كاش بخصم 10% أو تقسيط على 24/40/60 شهر',
+        'cash_discount_type'    => 'percentage',
+        'cash_discount_value'   => '10.00',
+        'inst_down_payment_pct' => '50.00',
+        'inst_months'           => 24,
+        'inst_interest_rate'    => '0.00',
+        'inst_grace_type'       => null,
+        'inst_grace_months'     => 0,
+        'inst_post_grace_rate'  => null,
+        'branch_id'             => null,
+        'applies_to'            => 'membership_fee',
+        'effective_from'        => '2026-01-01',
+        'effective_to'          => '2026-12-31',
+        'is_active'             => 1,
+        'board_decision_number' => null,
+        'board_decision_date'   => null,
+        'notes'                 => 'من ملف اسعار عضويات شيراتون — 4 مستويات دفع',
+        'created_by'            => null,
+        'updated_by'            => null,
+        'created_at'            => $ts,
+        'updated_at'            => $ts,
+    ]);
+
+    // ─── 4. Create 4 Tiers ───
+    $tiers = [
+        [
+            'tier_order'        => 1,
+            'tier_name_ar'      => 'كاش كامل — خصم 10%',
+            'payment_type'      => 'cash',
+            'cash_discount_pct' => '10.00',
+            'down_payment_pct'  => null,
+            'months'            => null,
+            'interest_rate'     => null,
+        ],
+        [
+            'tier_order'        => 2,
+            'tier_name_ar'      => 'تقسيط 24 شهر — بدون فوائد',
+            'payment_type'      => 'installment',
+            'cash_discount_pct' => null,
+            'down_payment_pct'  => '50.00',
+            'months'            => 24,
+            'interest_rate'     => '0.00',
+        ],
+        [
+            'tier_order'        => 3,
+            'tier_name_ar'      => 'تقسيط 40 شهر — فائدة 15%',
+            'payment_type'      => 'installment',
+            'cash_discount_pct' => null,
+            'down_payment_pct'  => '33.33',
+            'months'            => 40,
+            'interest_rate'     => '15.00',
+        ],
+        [
+            'tier_order'        => 4,
+            'tier_name_ar'      => 'تقسيط 60 شهر — فائدة 15%',
+            'payment_type'      => 'installment',
+            'cash_discount_pct' => null,
+            'down_payment_pct'  => '13.33',
+            'months'            => 60,
+            'interest_rate'     => '15.00',
+        ],
+    ];
+
+    foreach ($tiers as $tier) {
+        $db->insert('board_offer_tiers', array_merge($tier, [
+            'board_offer_id' => $offerId,
+            'is_active'      => 1,
+            'created_at'     => $ts,
+            'updated_at'     => $ts,
+        ]));
+    }
+};