diff --git a/assets/css/custom.css b/assets/css/custom.css
index a503557..bb6f174 100644
--- a/assets/css/custom.css
+++ b/assets/css/custom.css
@@ -235,6 +235,10 @@ body {
     border-bottom: 2px solid var(--border);
 }
 
+.op-50 {
+    opacity: 0.5;
+}
+
 /* RTL Adjustments */
 [dir="rtl"] .ms-auto {
     margin-right: auto !important;
diff --git a/assets/js/main.js b/assets/js/main.js
index d809544..15b0542 100644
--- a/assets/js/main.js
+++ b/assets/js/main.js
@@ -20,7 +20,30 @@ function setLanguage(lang) {
     
     // Update UI text
     document.querySelectorAll('[data-en]').forEach(el => {
-        el.textContent = el.getAttribute(`data-${lang}`);
+        const text = el.getAttribute(`data-${lang}`);
+        if (text) {
+            // If it's a simple element with only text, update it
+            // If it has children, we should only update the text node parts
+            // But for simplicity in this app, we'll check if it has any children
+            if (el.children.length === 0) {
+                el.textContent = text;
+            } else {
+                // If it has children (like icons), we try to find a text node to update
+                // or just update the first text node child
+                let found = false;
+                for (let node of el.childNodes) {
+                    if (node.nodeType === 3) { // Text node
+                        node.textContent = text;
+                        found = true;
+                        break;
+                    }
+                }
+                if (!found) {
+                    // Fallback: append text if no text node exists
+                    el.appendChild(document.createTextNode(text));
+                }
+            }
+        }
     });
 
     // Update buttons/inputs
diff --git a/db/migrations/20260217_sales_returns.sql b/db/migrations/20260217_sales_returns.sql
new file mode 100644
index 0000000..c8a8564
--- /dev/null
+++ b/db/migrations/20260217_sales_returns.sql
@@ -0,0 +1,23 @@
+-- Migration: Add Sales Returns tables
+CREATE TABLE IF NOT EXISTS sales_returns (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    invoice_id INT NOT NULL,
+    customer_id INT NULL,
+    return_date DATE NOT NULL,
+    total_amount DECIMAL(15, 3) NOT NULL DEFAULT 0,
+    notes TEXT,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    FOREIGN KEY (invoice_id) REFERENCES invoices(id) ON DELETE CASCADE,
+    FOREIGN KEY (customer_id) REFERENCES customers(id) ON DELETE SET NULL
+);
+
+CREATE TABLE IF NOT EXISTS sales_return_items (
+    id INT AUTO_INCREMENT PRIMARY KEY,
+    return_id INT NOT NULL,
+    item_id INT NOT NULL,
+    quantity DECIMAL(15, 2) NOT NULL,
+    unit_price DECIMAL(15, 3) NOT NULL,
+    total_price DECIMAL(15, 3) NOT NULL,
+    FOREIGN KEY (return_id) REFERENCES sales_returns(id) ON DELETE CASCADE,
+    FOREIGN KEY (item_id) REFERENCES stock_items(id) ON DELETE CASCADE
+);
diff --git a/index.php b/index.php
index 1195feb..7e49dab 100644
--- a/index.php
+++ b/index.php
@@ -104,6 +104,17 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET' && isset($_GET['action'])) {
         echo json_encode(['success' => true, 'points' => (float)$points]);
         exit;
     }
+    if ($_GET['action'] === 'get_invoice_items') {
+        header('Content-Type: application/json');
+        $invoice_id = (int)$_GET['invoice_id'];
+        $stmt = db()->prepare("SELECT ii.*, i.name_en, i.name_ar, i.sku 
+                                FROM invoice_items ii 
+                                JOIN stock_items i ON ii.item_id = i.id 
+                                WHERE ii.invoice_id = ?");
+        $stmt->execute([$invoice_id]);
+        echo json_encode($stmt->fetchAll());
+        exit;
+    }
 }
 
 if ($_SERVER['REQUEST_METHOD'] === 'POST') {
@@ -1046,6 +1057,72 @@ if ($_SERVER['REQUEST_METHOD'] === 'POST') {
             }
         }
     }
+
+    if (isset($_POST['add_sales_return'])) {
+        $invoice_id = (int)$_POST['invoice_id'];
+        $return_date = $_POST['return_date'] ?: date('Y-m-d');
+        $notes = $_POST['notes'] ?? '';
+        $item_ids = $_POST['item_ids'] ?? [];
+        $quantities = $_POST['quantities'] ?? [];
+        $prices = $_POST['prices'] ?? [];
+
+        if ($invoice_id && !empty($item_ids)) {
+            $db = db();
+            $db->beginTransaction();
+            try {
+                // Get customer ID from invoice
+                $stmt = $db->prepare("SELECT customer_id FROM invoices WHERE id = ?");
+                $stmt->execute([$invoice_id]);
+                $customer_id = $stmt->fetchColumn();
+
+                $total_return_amount = 0;
+                $items_data = [];
+                foreach ($item_ids as $index => $item_id) {
+                    $qty = (float)$quantities[$index];
+                    $price = (float)$prices[$index];
+                    if ($qty <= 0) continue;
+
+                    $line_total = $qty * $price;
+                    $total_return_amount += $line_total;
+
+                    $items_data[] = [
+                        'id' => $item_id,
+                        'qty' => $qty,
+                        'price' => $price,
+                        'total' => $line_total
+                    ];
+                }
+
+                if (empty($items_data)) throw new Exception("No items to return");
+
+                // Create Sales Return record
+                $stmt = $db->prepare("INSERT INTO sales_returns (invoice_id, customer_id, return_date, total_amount, notes) VALUES (?, ?, ?, ?, ?)");
+                $stmt->execute([$invoice_id, $customer_id, $return_date, $total_return_amount, $notes]);
+                $return_id = $db->lastInsertId();
+
+                foreach ($items_data as $item) {
+                    $stmt = $db->prepare("INSERT INTO sales_return_items (return_id, item_id, quantity, unit_price, total_price) VALUES (?, ?, ?, ?, ?)");
+                    $stmt->execute([$return_id, $item['id'], $item['qty'], $item['price'], $item['total']]);
+
+                    // Restore stock
+                    $stmt = $db->prepare("UPDATE stock_items SET stock_quantity = stock_quantity + ? WHERE id = ?");
+                    $stmt->execute([$item['qty'], $item['id']]);
+                }
+
+                // If it was a credit sale, we might want to reduce the customer balance.
+                if ($customer_id) {
+                    $stmt = $db->prepare("UPDATE customers SET balance = balance + ? WHERE id = ?");
+                    $stmt->execute([$total_return_amount, $customer_id]);
+                }
+
+                $db->commit();
+                $message = "Sales Return #$return_id processed successfully!";
+            } catch (Exception $e) {
+                if (isset($db)) $db->rollBack();
+                $message = "Error: " . $e->getMessage();
+            }
+        }
+    }
 }
 
 
@@ -1252,6 +1329,27 @@ switch ($page) {
         $data['customers_list'] = db()->query("SELECT id, name FROM customers WHERE type = '" . ($type === 'sale' ? 'customer' : 'supplier') . "' ORDER BY name ASC")->fetchAll();
         break;
 
+    case 'sales_returns':
+        $where = ["1=1"];
+        $params = [];
+        if (!empty($_GET['search'])) {
+            $where[] = "(sr.id LIKE ? OR c.name LIKE ? OR sr.invoice_id LIKE ?)";
+            $params[] = "%{$_GET['search']}%";
+            $params[] = "%{$_GET['search']}%";
+            $params[] = "%{$_GET['search']}%";
+        }
+        $whereSql = implode(" AND ", $where);
+        $stmt = db()->prepare("SELECT sr.*, c.name as customer_name, i.total_with_vat as invoice_total 
+                               FROM sales_returns sr 
+                               LEFT JOIN customers c ON sr.customer_id = c.id 
+                               LEFT JOIN invoices i ON sr.invoice_id = i.id
+                               WHERE $whereSql 
+                               ORDER BY sr.id DESC");
+        $stmt->execute($params);
+        $data['returns'] = $stmt->fetchAll();
+        $data['sales_invoices'] = db()->query("SELECT id, invoice_date, total_with_vat FROM invoices WHERE type = 'sale' ORDER BY id DESC")->fetchAll();
+        break;
+
     case 'customer_statement':
     case 'supplier_statement':
         $type = ($page === 'customer_statement') ? 'customer' : 'supplier';
@@ -1335,6 +1433,25 @@ switch ($page) {
         $stmt->execute([$start_date, $end_date]);
         $data['total_expenses'] = $stmt->fetchColumn() ?: 0;
         break;
+    case 'expiry_report':
+        $where = ["expiry_date IS NOT NULL"];
+        $params = [];
+        $filter = $_GET['filter'] ?? 'all';
+        if ($filter === 'expired') {
+            $where[] = "expiry_date <= CURDATE()";
+        } elseif ($filter === 'near_expiry') {
+            $where[] = "expiry_date > CURDATE() AND expiry_date <= DATE_ADD(CURDATE(), INTERVAL 30 DAY)";
+        }
+        
+        $whereSql = implode(" AND ", $where);
+        $stmt = db()->prepare("SELECT i.*, c.name_en as cat_en, c.name_ar as cat_ar 
+                               FROM stock_items i 
+                               LEFT JOIN stock_categories c ON i.category_id = c.id 
+                               WHERE $whereSql 
+                               ORDER BY i.expiry_date ASC");
+        $stmt->execute($params);
+        $data['expiry_items'] = $stmt->fetchAll();
+        break;
     default:
         $data['customers'] = db()->query("SELECT * FROM customers WHERE type = 'customer' ORDER BY id DESC LIMIT 5")->fetchAll();
         // Dashboard stats
@@ -1345,9 +1462,15 @@ switch ($page) {
             'total_received' => db()->query("SELECT SUM(amount) FROM payments p JOIN invoices i ON p.invoice_id = i.id WHERE i.type = 'sale'")->fetchColumn() ?: 0,
             'total_purchases' => db()->query("SELECT SUM(total_with_vat) FROM invoices WHERE type = 'purchase'")->fetchColumn() ?: 0,
             'total_paid' => db()->query("SELECT SUM(amount) FROM payments p JOIN invoices i ON p.invoice_id = i.id WHERE i.type = 'purchase'")->fetchColumn() ?: 0,
+            'expired_items' => db()->query("SELECT COUNT(*) FROM stock_items WHERE expiry_date IS NOT NULL AND expiry_date <= CURDATE()")->fetchColumn(),
+            'near_expiry_items' => db()->query("SELECT COUNT(*) FROM stock_items WHERE expiry_date IS NOT NULL AND expiry_date > CURDATE() AND expiry_date <= DATE_ADD(CURDATE(), INTERVAL 30 DAY)")->fetchColumn(),
         ];
         $data['stats']['total_receivable'] = $data['stats']['total_sales'] - $data['stats']['total_received'];
         $data['stats']['total_payable'] = $data['stats']['total_purchases'] - $data['stats']['total_paid'];
+
+        // Sales Chart Data
+        $data['monthly_sales'] = db()->query("SELECT DATE_FORMAT(invoice_date, '%M %Y') as label, SUM(total_with_vat) as total FROM invoices WHERE type = 'sale' GROUP BY DATE_FORMAT(invoice_date, '%Y-%m') ORDER BY invoice_date ASC LIMIT 12")->fetchAll(PDO::FETCH_ASSOC);
+        $data['yearly_sales'] = db()->query("SELECT YEAR(invoice_date) as label, SUM(total_with_vat) as total FROM invoices WHERE type = 'sale' GROUP BY label ORDER BY label ASC LIMIT 5")->fetchAll(PDO::FETCH_ASSOC);
         break;
 }
 
@@ -1368,9 +1491,11 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
     <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css">
     <link href="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/css/select2.min.css" rel="stylesheet" />
     <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/select2@4.1.0-rc.0/dist/js/select2.min.js"></script>
     <script src="https://cdn.jsdelivr.net/npm/sweetalert2@11"></script>
     <script src="https://cdn.jsdelivr.net/npm/jsbarcode@3.11.5/dist/JsBarcode.all.min.js"></script>
+    <script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
     <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700&display=swap" rel="stylesheet">
     <link rel="stylesheet" href="assets/css/custom.css?v=<?php echo time(); ?>">
     <style>
@@ -1402,6 +1527,9 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
             <a href="index.php?page=sales" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'sales' ? 'active' : '' ?>">
                 <i class="bi bi-cart"></i> <span data-en="Sales Tax Invoices" data-ar="فواتير المبيعات الضريبية">Sales Tax Invoices</span>
             </a>
+            <a href="index.php?page=sales_returns" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'sales_returns' ? 'active' : '' ?>">
+                <i class="bi bi-arrow-return-left"></i> <span data-en="Sales Returns" data-ar="مرتجع المبيعات">Sales Returns</span>
+            </a>
             <a href="index.php?page=purchases" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'purchases' ? 'active' : '' ?>">
                 <i class="bi bi-bag"></i> <span data-en="Purchase Tax Invoices" data-ar="فواتير المشتريات الضريبية">Purchase Tax Invoices</span>
             </a>
@@ -1470,6 +1598,9 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
             <a href="index.php?page=supplier_statement" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'supplier_statement' ? 'active' : '' ?>">
                 <i class="bi bi-file-earmark-medical"></i> <span data-en="Supplier Statement" data-ar="كشف حساب مورد">Supplier Statement</span>
             </a>
+            <a href="index.php?page=expiry_report" class="nav-link <?= isset($_GET['page']) && $_GET['page'] === 'expiry_report' ? 'active' : '' ?>">
+                <i class="bi bi-calendar-x"></i> <span data-en="Expiry Report" data-ar="تقرير الانتهاء">Expiry Report</span>
+            </a>
         </div>
 
         <!-- Configuration Section -->
@@ -1507,8 +1638,10 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                 'payment_methods' => ['en' => 'Payment Methods', 'ar' => 'طرق الدفع'],
                 'sales' => ['en' => 'Sales Tax Invoices', 'ar' => 'فواتير المبيعات الضريبية'],
                 'purchases' => ['en' => 'Purchase Tax Invoices', 'ar' => 'فواتير المشتريات الضريبية'],
+                'sales_returns' => ['en' => 'Sales Returns', 'ar' => 'مرتجع المبيعات'],
                 'customer_statement' => ['en' => 'Customer Statement', 'ar' => 'كشف حساب عميل'],
                 'supplier_statement' => ['en' => 'Supplier Statement', 'ar' => 'كشف حساب مورد'],
+                'expiry_report' => ['en' => 'Expiry Report', 'ar' => 'تقرير انتهاء الصلاحية'],
                 'settings' => ['en' => 'Company Profile', 'ar' => 'ملف الشركة'],
             ];
             $currTitle = $titles[$page] ?? $titles['dashboard'];
@@ -1557,59 +1690,150 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
     <?php endif; ?>
 
     <?php if ($page === 'dashboard'): ?>
+    
+    <?php if ($data['stats']['expired_items'] > 0 || $data['stats']['near_expiry_items'] > 0): ?>
+    <div class="row mb-4">
+        <div class="col-12">
+            <div class="alert alert-warning border-0 shadow-sm d-flex align-items-center mb-0">
+                <i class="bi bi-exclamation-triangle-fill h4 mb-0 me-3 text-warning"></i>
+                <div class="flex-grow-1">
+                    <span data-en="Inventory Alert:" data-ar="تنبيه المخزون:"><strong>Inventory Alert:</strong></span>
+                    <?php if ($data['stats']['expired_items'] > 0): ?>
+                        <span data-en="<?= $data['stats']['expired_items'] ?> items have expired." data-ar="هنالك <?= $data['stats']['expired_items'] ?> صنف منتهي الصلاحية."><?= $data['stats']['expired_items'] ?> items have expired.</span>
+                    <?php endif; ?>
+                    <?php if ($data['stats']['near_expiry_items'] > 0): ?>
+                        <span data-en="<?= $data['stats']['near_expiry_items'] ?> items are expiring soon (within 30 days)." data-ar="هنالك <?= $data['stats']['near_expiry_items'] ?> صنف ستنتهي صلاحيتها قريباً (خلال 30 يوم)."><?= $data['stats']['near_expiry_items'] ?> items are expiring soon (within 30 days).</span>
+                    <?php endif; ?>
+                </div>
+                <a href="index.php?page=expiry_report" class="btn btn-warning btn-sm" data-en="View Report" data-ar="عرض التقرير">View Report</a>
+            </div>
+        </div>
+    </div>
+    <?php endif; ?>
+
     <div class="row g-4 mb-4">
-        <div class="col">
+        <div class="col-md-3">
             <div class="card p-3 border-start border-primary border-4 h-100">
-                <div class="text-muted small" data-en="Total Sales" data-ar="إجمالي المبيعات">Total Sales</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_sales'] ?? 0), 3) ?></div>
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Sales" data-ar="إجمالي المبيعات">Total Sales</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_sales'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-cart h2 text-primary op-50"></i>
+                    </div>
+                </div>
             </div>
         </div>
-        <div class="col">
+        <div class="col-md-3">
             <div class="card p-3 border-start border-warning border-4 h-100">
-                <div class="text-muted small" data-en="Total Received" data-ar="إجمالي المبالغ المحصلة">Total Received</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_received'] ?? 0), 3) ?></div>
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Received" data-ar="إجمالي المبالغ المحصلة">Total Received</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_received'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-cash-stack h2 text-warning op-50"></i>
+                    </div>
+                </div>
             </div>
         </div>
-        <div class="col">
+        <div class="col-md-3">
             <div class="card p-3 border-start border-danger border-4 h-100">
-                <div class="text-muted small" data-en="Total Receivable" data-ar="إجمالي المبالغ المتبقية">Total Receivable</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_receivable'] ?? 0), 3) ?></div>
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Customer Due" data-ar="مستحقات العملاء">Customer Due</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_receivable'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-person-exclamation h2 text-danger op-50"></i>
+                    </div>
+                </div>
             </div>
         </div>
-    </div>
-
-    <div class="row g-4 mb-4">
-        <div class="col">
+        <div class="col-md-3">
             <div class="card p-3 border-start border-dark border-4 h-100 bg-light">
-                <div class="text-muted small" data-en="Total Purchases" data-ar="إجمالي المشتريات">Total Purchases</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_purchases'] ?? 0), 3) ?></div>
-            </div>
-        </div>
-        <div class="col">
-            <div class="card p-3 border-start border-info border-4 h-100 bg-light">
-                <div class="text-muted small" data-en="Total Paid to Suppliers" data-ar="إجمالي المدفوع للموردين">Total Paid to Suppliers</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_paid'] ?? 0), 3) ?></div>
-            </div>
-        </div>
-        <div class="col">
-            <div class="card p-3 border-start border-secondary border-4 h-100 bg-light">
-                <div class="text-muted small" data-en="Total Payable" data-ar="إجمالي الذمم الدائنة">Total Payable</div>
-                <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_payable'] ?? 0), 3) ?></div>
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Purchases" data-ar="إجمالي المشتريات">Total Purchases</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_purchases'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-bag h2 text-dark op-50"></i>
+                    </div>
+                </div>
             </div>
         </div>
     </div>
 
     <div class="row g-4 mb-4">
-        <div class="col">
-            <div class="card p-3 border-start border-success border-4 h-100">
-                <div class="text-muted small" data-en="Total Customers" data-ar="إجمالي العملاء">Total Customers</div>
-                <div class="h4 m-0"><?= (int)($data['stats']['total_customers'] ?? 0) ?></div>
+        <div class="col-md-3">
+            <div class="card p-3 border-start border-info border-4 h-100 bg-light">
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Paid" data-ar="إجمالي المدفوع">Total Paid</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_paid'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-wallet2 h2 text-info op-50"></i>
+                    </div>
+                </div>
             </div>
         </div>
-        <div class="col">
+        <div class="col-md-3">
+            <div class="card p-3 border-start border-secondary border-4 h-100 bg-light">
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Supplier Due" data-ar="مستحقات الموردين">Supplier Due</div>
+                        <div class="h4 m-0">OMR <?= number_format((float)($data['stats']['total_payable'] ?? 0), 3) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-truck h2 text-secondary op-50"></i>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <div class="col-md-3">
+            <div class="card p-3 border-start border-success border-4 h-100">
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Customers" data-ar="إجمالي العملاء">Total Customers</div>
+                        <div class="h4 m-0"><?= (int)($data['stats']['total_customers'] ?? 0) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-people h2 text-success op-50"></i>
+                    </div>
+                </div>
+            </div>
+        </div>
+        <div class="col-md-3">
             <div class="card p-3 border-start border-info border-4 h-100">
-                <div class="text-muted small" data-en="Total Items" data-ar="إجمالي الأصناف">Total Items</div>
-                <div class="h4 m-0"><?= (int)($data['stats']['total_items'] ?? 0) ?></div>
+                <div class="d-flex align-items-center">
+                    <div class="flex-grow-1">
+                        <div class="text-muted small" data-en="Total Items" data-ar="إجمالي الأصناف">Total Items</div>
+                        <div class="h4 m-0"><?= (int)($data['stats']['total_items'] ?? 0) ?></div>
+                    </div>
+                    <div class="ms-3">
+                        <i class="bi bi-box-seam h2 text-info op-50"></i>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <div class="row g-4 mb-4">
+        <div class="col-12">
+            <div class="card p-4">
+                <div class="d-flex justify-content-between align-items-center mb-4">
+                    <h5 class="m-0" data-en="Sales Performance" data-ar="أداء المبيعات">Sales Performance</h5>
+                    <div class="btn-group btn-group-sm">
+                        <button type="button" class="btn btn-outline-primary active" id="btnMonthly" data-en="Monthly" data-ar="شهري">Monthly</button>
+                        <button type="button" class="btn btn-outline-primary" id="btnYearly" data-en="Yearly" data-ar="سنوي">Yearly</button>
+                    </div>
+                </div>
+                <div style="height: 300px;">
+                    <canvas id="salesChart"></canvas>
+                </div>
             </div>
         </div>
     </div>
@@ -1977,7 +2201,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                                                     <div class="bg-light rounded d-flex align-items-center justify-content-center mx-auto" style="width: 150px; height: 150px;">
                                                         <i class="bi bi-image text-muted" style="font-size: 3rem;"></i>
                                                     </div>
-                                                <?php endif; ?>
+    <?php endif; ?>
                                             </div>
                                             <table class="table table-sm">
                                                 <tr><th class="text-muted">SKU</th><td><?= htmlspecialchars($item['sku']) ?></td></tr>
@@ -2089,6 +2313,64 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
         </div>
     </div>
 
+    <?php elseif ($page === 'expiry_report'): ?>
+    <div class="card p-4">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h5 class="m-0" data-en="Expiry Report" data-ar="تقرير انتهاء الصلاحية">Expiry Report</h5>
+            <div class="d-flex gap-2">
+                <a href="index.php?page=expiry_report&filter=all" class="btn btn-sm <?= !isset($_GET['filter']) || $_GET['filter'] === 'all' ? 'btn-primary' : 'btn-outline-primary' ?>" data-en="All" data-ar="الكل">All</a>
+                <a href="index.php?page=expiry_report&filter=expired" class="btn btn-sm <?= isset($_GET['filter']) && $_GET['filter'] === 'expired' ? 'btn-danger' : 'btn-outline-danger' ?>" data-en="Expired" data-ar="منتهي">Expired</a>
+                <a href="index.php?page=expiry_report&filter=near_expiry" class="btn btn-sm <?= isset($_GET['filter']) && $_GET['filter'] === 'near_expiry' ? 'btn-warning' : 'btn-outline-warning' ?>" data-en="Near Expiry" data-ar="قريب الانتهاء">Near Expiry</a>
+            </div>
+        </div>
+        <div class="table-responsive">
+            <table class="table table-hover align-middle">
+                <thead>
+                    <tr>
+                        <th data-en="SKU" data-ar="الباركود">SKU</th>
+                        <th data-en="Item Name" data-ar="اسم الصنف">Item Name</th>
+                        <th data-en="Category" data-ar="الفئة">Category</th>
+                        <th data-en="Stock Level" data-ar="المخزون">Stock Level</th>
+                        <th data-en="Expiry Date" data-ar="تاريخ الانتهاء">Expiry Date</th>
+                        <th data-en="Status" data-ar="الحالة">Status</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <?php if (empty($data['expiry_items'])): ?>
+                    <tr>
+                        <td colspan="6" class="text-center text-muted p-4" data-en="No items found." data-ar="لا توجد أصناف.">No items found.</td>
+                    </tr>
+                    <?php endif; ?>
+                    <?php foreach ($data['expiry_items'] as $item): ?>
+                    <?php 
+                        $is_expired = strtotime($item['expiry_date']) <= strtotime(date('Y-m-d'));
+                        $is_near = !$is_expired && strtotime($item['expiry_date']) <= strtotime(date('Y-m-d', strtotime('+30 days')));
+                    ?>
+                    <tr class="<?= $is_expired ? 'table-danger' : ($is_near ? 'table-warning' : '') ?>">
+                        <td><?= htmlspecialchars($item['sku']) ?></td>
+                        <td>
+                            <div class="fw-bold"><?= htmlspecialchars($item['name_en']) ?></div>
+                            <div class="small text-muted"><?= htmlspecialchars($item['name_ar']) ?></div>
+                        </td>
+                        <td><?= htmlspecialchars($item['cat_en'] ?? '---') ?></td>
+                        <td><?= number_format((float)$item['stock_quantity'], 3) ?></td>
+                        <td><?= htmlspecialchars($item['expiry_date']) ?></td>
+                        <td>
+                            <?php if ($is_expired): ?>
+                                <span class="badge bg-danger" data-en="Expired" data-ar="منتهي">Expired</span>
+                            <?php elseif ($is_near): ?>
+                                <span class="badge bg-warning text-dark" data-en="Near Expiry" data-ar="قريب الانتهاء">Near Expiry</span>
+                            <?php else: ?>
+                                <span class="badge bg-success" data-en="Good" data-ar="صالح">Good</span>
+                            <?php endif; ?>
+                        </td>
+                    </tr>
+                    <?php endforeach; ?>
+                </tbody>
+            </table>
+        </div>
+    </div>
+
     <?php elseif ($page === 'pos'): ?>
     <?php
     $products = db()->query("SELECT * FROM stock_items WHERE stock_quantity > 0 ORDER BY name_en ASC")->fetchAll(PDO::FETCH_ASSOC);
@@ -3073,7 +3355,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                 <input type="hidden" name="page" value="<?= $page ?>">
                 <div class="col-md-4">
                     <label class="form-label small fw-bold" data-en="Select <?= $page === 'customer_statement' ? 'Customer' : 'Supplier' ?>" data-ar="اختر <?= $page === 'customer_statement' ? 'العميل' : 'المورد' ?>">Select <?= $page === 'customer_statement' ? 'Customer' : 'Supplier' ?></label>
-                    <select name="entity_id" class="form-select" required>
+                    <select name="entity_id" class="form-select select2" required>
                         <option value="">---</option>
                         <?php foreach ($data['entities'] as $e): ?>
                         <option value="<?= $e['id'] ?>" <?= (($_GET['entity_id'] ?? '') == $e['id']) ? 'selected' : '' ?>><?= htmlspecialchars($e['name']) ?></option>
@@ -3398,7 +3680,7 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
                                             <div class="modal-body">
                                                 <div class="mb-3">
                                                     <label class="form-label">Category</label>
-                                                    <select name="category_id" class="form-select" required>
+                            <select name="category_id" class="form-select select2" required>
                                                         <?php foreach ($data['expense_categories'] as $c): ?>
                                                         <option value="<?= $c['id'] ?>" <?= $c['id'] == $exp['category_id'] ? 'selected' : '' ?>><?= htmlspecialchars($c['name_en']) ?></option>
                                                         <?php endforeach; ?>
@@ -3551,6 +3833,123 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
         </div>
     </div>
 
+    <?php elseif ($page === 'sales_returns'): ?>
+    <div class="card p-4">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h5 class="m-0" data-en="Sales Returns" data-ar="مرتجع المبيعات">Sales Returns</h5>
+            <button type="button" class="btn btn-primary" data-bs-toggle="modal" data-bs-target="#addSalesReturnModal" id="createSalesReturnBtn">
+                <i class="bi bi-plus-lg"></i> <span data-en="Create New Return" data-ar="إنشاء مرتجع جديد">Create New Return</span>
+            </button>
+        </div>
+
+        <div class="bg-light p-3 rounded mb-4">
+            <form method="GET" class="row g-3">
+                <input type="hidden" name="page" value="sales_returns">
+                <div class="col-md-9">
+                    <input type="text" name="search" class="form-control form-control-sm" value="<?= htmlspecialchars($_GET['search'] ?? '') ?>" placeholder="Search by Return ID, Customer or Invoice ID...">
+                </div>
+                <div class="col-md-3">
+                    <button type="submit" class="btn btn-primary btn-sm w-100">Filter</button>
+                </div>
+            </form>
+        </div>
+
+        <div class="table-responsive">
+            <table class="table table-hover align-middle">
+                <thead>
+                    <tr>
+                        <th data-en="Return #" data-ar="رقم المرتجع">Return #</th>
+                        <th data-en="Date" data-ar="التاريخ">Date</th>
+                        <th data-en="Invoice #" data-ar="رقم الفاتورة">Invoice #</th>
+                        <th data-en="Customer" data-ar="العميل">Customer</th>
+                        <th data-en="Total Amount" data-ar="إجمالي المرتجع" class="text-end">Total Amount</th>
+                        <th data-en="Actions" data-ar="الإجراءات" class="text-end">Actions</th>
+                    </tr>
+                </thead>
+                <tbody>
+                    <?php foreach ($data['returns'] as $ret): ?>
+                    <tr>
+                        <td>RET-<?= str_pad((string)$ret['id'], 5, '0', STR_PAD_LEFT) ?></td>
+                        <td><?= $ret['return_date'] ?></td>
+                        <td>INV-<?= str_pad((string)$ret['invoice_id'], 5, '0', STR_PAD_LEFT) ?></td>
+                        <td><?= htmlspecialchars($ret['customer_name'] ?? 'Walk-in') ?></td>
+                        <td class="text-end fw-bold text-danger">OMR <?= number_format((float)$ret['total_amount'], 3) ?></td>
+                        <td class="text-end">
+                            <div class="btn-group btn-group-sm">
+                                <button class="btn btn-outline-info view-return-btn" data-id="<?= $ret['id'] ?>"><i class="bi bi-eye"></i></button>
+                            </div>
+                        </td>
+                    </tr>
+                    <?php endforeach; ?>
+                    <?php if (empty($data['returns'])): ?>
+                    <tr><td colspan="6" class="text-center py-4 text-muted">No returns found</td></tr>
+                    <?php endif; ?>
+                </tbody>
+            </table>
+        </div>
+    </div>
+
+    <?php elseif ($page === 'settings'): ?>
+    <div class="card p-4">
+        <h5 class="mb-4" data-en="Company Profile" data-ar="ملف الشركة">Company Profile</h5>
+        <form method="POST" enctype="multipart/form-data">
+            <div class="row g-3">
+                <div class="col-md-6">
+                    <label class="form-label" data-en="Company Name" data-ar="اسم الشركة">Company Name</label>
+                    <input type="text" name="settings[company_name]" class="form-control" value="<?= htmlspecialchars($data['settings']['company_name'] ?? '') ?>">
+                </div>
+                <div class="col-md-6">
+                    <label class="form-label" data-en="Phone" data-ar="الهاتف">Phone</label>
+                    <input type="text" name="settings[company_phone]" class="form-control" value="<?= htmlspecialchars($data['settings']['company_phone'] ?? '') ?>">
+                </div>
+                <div class="col-md-6">
+                    <label class="form-label" data-en="Email" data-ar="البريد الإلكتروني">Email</label>
+                    <input type="email" name="settings[company_email]" class="form-control" value="<?= htmlspecialchars($data['settings']['company_email'] ?? '') ?>">
+                </div>
+                <div class="col-md-6">
+                    <label class="form-label" data-en="VAT Number" data-ar="الرقم الضريبي">VAT Number</label>
+                    <input type="text" name="settings[vat_number]" class="form-control" value="<?= htmlspecialchars($data['settings']['vat_number'] ?? '') ?>">
+                </div>
+                <div class="col-md-12">
+                    <label class="form-label" data-en="Address" data-ar="العنوان">Address</label>
+                    <textarea name="settings[company_address]" class="form-control" rows="3"><?= htmlspecialchars($data['settings']['company_address'] ?? '') ?></textarea>
+                </div>
+                <div class="col-md-4">
+                    <label class="form-label" data-en="Company Logo" data-ar="شعار الشركة">Company Logo</label>
+                    <input type="file" name="company_logo" class="form-control" accept="image/*">
+                    <?php if (!empty($data['settings']['company_logo'])): ?>
+                    <div class="mt-2">
+                        <img src="<?= htmlspecialchars($data['settings']['company_logo']) ?>?v=<?= time() ?>" alt="Logo" class="img-thumbnail" style="max-height: 80px;">
+                    </div>
+                    <?php endif; ?>
+                </div>
+                <div class="col-md-4">
+                    <label class="form-label" data-en="Favicon" data-ar="أيقونة الموقع">Favicon</label>
+                    <input type="file" name="favicon" class="form-control" accept="image/*">
+                    <?php if (!empty($data['settings']['favicon'])): ?>
+                    <div class="mt-2">
+                        <img src="<?= htmlspecialchars($data['settings']['favicon']) ?>?v=<?= time() ?>" alt="Favicon" class="img-thumbnail" style="max-height: 32px;">
+                    </div>
+                    <?php endif; ?>
+                </div>
+                <div class="col-md-4">
+                    <label class="form-label" data-en="Manager Signature" data-ar="توقيع المدير">Manager Signature</label>
+                    <input type="file" name="manager_signature" class="form-control" accept="image/*">
+                    <?php if (!empty($data['settings']['manager_signature'])): ?>
+                    <div class="mt-2">
+                        <img src="<?= htmlspecialchars($data['settings']['manager_signature']) ?>?v=<?= time() ?>" alt="Signature" class="img-thumbnail" style="max-height: 80px;">
+                    </div>
+                    <?php endif; ?>
+                </div>
+                <div class="col-md-12 mt-4">
+                    <button type="submit" name="update_settings" class="btn btn-primary">
+                        <i class="bi bi-save"></i> <span data-en="Save Changes" data-ar="حفظ التغييرات">Save Changes</span>
+                    </button>
+                </div>
+            </div>
+        </form>
+    </div>
+
     <?php endif; ?>
 </div>
 
@@ -3912,7 +4311,17 @@ $projectDescription = $_SERVER['PROJECT_DESCRIPTION'] ?? 'Accounting System';
 
 <script>
 document.addEventListener('DOMContentLoaded', function() {
-    const hasExpiryToggle = document.getElementById('hasExpiryToggle');
+    console.log("DOM Content Loaded - Accounting System");
+    try {
+        // Initialize Select2 for all searchable dropdowns
+        $('.select2').each(function() {
+            $(this).select2({
+                width: '100%',
+                dropdownParent: $(this).closest('.modal').length ? $(this).closest('.modal') : $(document.body)
+            });
+        });
+
+        const hasExpiryToggle = document.getElementById('hasExpiryToggle');
     const expiryDateContainer = document.getElementById('expiryDateContainer');
     const suggestSkuBtn = document.getElementById('suggestSkuBtn');
     const skuInput = document.getElementById('skuInput');
@@ -3972,10 +4381,14 @@ document.addEventListener('DOMContentLoaded', function() {
         $rid = (int)$_SESSION['show_receipt_id'];
         unset($_SESSION['trigger_receipt_modal']);
     ?>
-    showReceipt(<?= $rid ?>);
+    if (typeof showReceipt === 'function') {
+        showReceipt(<?= $rid ?>);
+    } else {
+        setTimeout(() => { if (typeof showReceipt === 'function') showReceipt(<?= $rid ?>); }, 500);
+    }
     <?php endif; ?>
 
-    window.showReceipt = function(paymentId) {
+    function showReceipt(paymentId) {
         fetch(`index.php?action=get_payment_details&payment_id=${paymentId}`)
             .then(res => res.json())
             .then(data => {
@@ -4493,9 +4906,174 @@ document.addEventListener('DOMContentLoaded', function() {
             }
         }
     });
+
+    // Sales Return Logic
+    const returnInvoiceSelect = document.getElementById('return_invoice_select');
+    
+    if (returnInvoiceSelect) {
+        const calculateReturnTotal = function() {
+            let total = 0;
+            document.querySelectorAll('#return_items_tbody tr').forEach(row => {
+                const qtyInput = row.querySelector('.return-qty-input');
+                if (!qtyInput) return;
+                const qty = parseFloat(qtyInput.value) || 0;
+                const price = parseFloat(qtyInput.dataset.price) || 0;
+                const lineTotal = qty * price;
+                const lineTotalDisplay = row.querySelector('.line-total');
+                if (lineTotalDisplay) {
+                    lineTotalDisplay.innerText = lineTotal.toFixed(3);
+                }
+                total += lineTotal;
+            });
+            const totalDisplay = document.getElementById('return_total_display');
+            if (totalDisplay) {
+                totalDisplay.innerText = 'OMR ' + total.toFixed(3);
+            }
+            const submitBtn = document.getElementById('submit_return_btn');
+            if (submitBtn) {
+                submitBtn.disabled = total <= 0;
+            }
+        };
+
+        returnInvoiceSelect.addEventListener('change', async function() {
+            const invoiceId = this.value;
+            const container = document.getElementById('return_items_container');
+            const tbody = document.getElementById('return_items_tbody');
+            const submitBtn = document.getElementById('submit_return_btn');
+            
+            if (!invoiceId) {
+                if (container) container.style.display = 'none';
+                if (submitBtn) submitBtn.disabled = true;
+                return;
+            }
+
+            if (tbody) {
+                tbody.innerHTML = '<tr><td colspan="5" class="text-center"><div class="spinner-border spinner-border-sm text-primary"></div> Loading items...</td></tr>';
+            }
+            if (container) container.style.display = 'block';
+
+            try {
+                const resp = await fetch(`index.php?action=get_invoice_items&invoice_id=${invoiceId}`);
+                const items = await resp.json();
+                
+                if (tbody) {
+                    tbody.innerHTML = '';
+                    if (items.length === 0) {
+                        tbody.innerHTML = '<tr><td colspan="5" class="text-center text-muted">No items found for this invoice.</td></tr>';
+                    } else {
+                        let html = '';
+                        items.forEach(item => {
+                            html += `
+                                <tr>
+                                    <td>${item.name_en}<br><small class="text-muted">${item.sku}</small></td>
+                                    <td>${parseFloat(item.quantity).toFixed(2)}</td>
+                                    <td>
+                                        <input type="number" name="quantities[]" class="form-control form-control-sm return-qty-input" 
+                                            step="0.01" min="0" max="${item.quantity}" value="0" 
+                                            data-price="${item.unit_price}">
+                                        <input type="hidden" name="item_ids[]" value="${item.item_id}">
+                                        <input type="hidden" name="prices[]" value="${item.unit_price}">
+                                    </td>
+                                    <td class="text-end">${parseFloat(item.unit_price).toFixed(3)}</td>
+                                    <td class="text-end line-total">0.000</td>
+                                </tr>
+                            `;
+                        });
+                        tbody.innerHTML = html;
+                    }
+                }
+                
+                if (submitBtn) submitBtn.disabled = true;
+
+                // Add event listeners for qty changes
+                tbody.querySelectorAll('.return-qty-input').forEach(input => {
+                    input.addEventListener('input', calculateReturnTotal);
+                });
+
+            } catch (e) {
+                console.error(e);
+                Swal.fire('Error', 'Failed to fetch invoice items', 'error');
+            }
+        });
+    }
+
+    // View Return Logic
+    document.querySelectorAll('.view-return-btn').forEach(btn => {
+        btn.addEventListener('click', function() {
+            Swal.fire('Info', 'View Return Details functionality is coming soon!', 'info');
+        });
+    });
+
+    } catch (e) { console.error("JS Error in DOMContentLoaded:", e); }
 });
 </script>
-    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
+    <?php if ($page === 'sales_returns'): ?>
+    <!-- Add Sales Return Modal -->
+    <div class="modal fade" id="addSalesReturnModal" tabindex="-1">
+        <div class="modal-dialog modal-lg">
+            <div class="modal-content text-start border-0 shadow">
+                <div class="modal-header">
+                    <h5 class="modal-title">Process Sales Return</h5>
+                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
+                </div>
+                <form method="POST">
+                    <div class="modal-body">
+                        <div class="row g-3 mb-4 text-start">
+                            <div class="col-md-6">
+                                <label class="form-label" data-en="Select Invoice" data-ar="اختر الفاتورة">Select Invoice</label>
+                                <select name="invoice_id" id="return_invoice_select" class="form-select select2" required>
+                                    <option value="">Choose Invoice...</option>
+                                    <?php if (!empty($data['sales_invoices'])): ?>
+                                        <?php foreach ($data['sales_invoices'] as $inv): ?>
+                                        <option value="<?= $inv['id'] ?>">INV-<?= str_pad((string)$inv['id'], 5, '0', STR_PAD_LEFT) ?> (<?= $inv['invoice_date'] ?>) - OMR <?= number_format($inv['total_with_vat'], 3) ?></option>
+                                        <?php endforeach; ?>
+                                    <?php endif; ?>
+                                </select>
+                            </div>
+                            <div class="col-md-6">
+                                <label class="form-label">Return Date</label>
+                                <input type="date" name="return_date" class="form-control" value="<?= date('Y-m-d') ?>" required>
+                            </div>
+                        </div>
+
+                        <div id="return_items_container" style="display:none;" class="text-start">
+                            <h6>Items for Return</h6>
+                            <div class="table-responsive">
+                                <table class="table table-sm table-bordered">
+                                    <thead class="bg-light">
+                                        <tr>
+                                            <th>Item</th>
+                                            <th>Sold Qty</th>
+                                            <th>Return Qty</th>
+                                            <th>Price</th>
+                                            <th>Total</th>
+                                        </tr>
+                                    </thead>
+                                    <tbody id="return_items_tbody"></tbody>
+                                    <tfoot>
+                                        <tr>
+                                            <th colspan="4" class="text-end">Total Return Amount:</th>
+                                            <th class="text-end" id="return_total_display">OMR 0.000</th>
+                                        </tr>
+                                    </tfoot>
+                                </table>
+                            </div>
+                            <div class="mb-3">
+                                <label class="form-label">Notes / Reason for Return</label>
+                                <textarea name="notes" class="form-control" rows="2"></textarea>
+                            </div>
+                        </div>
+                    </div>
+                    <div class="modal-footer">
+                        <button type="button" class="btn btn-light" data-bs-dismiss="modal">Cancel</button>
+                        <button type="submit" name="add_sales_return" class="btn btn-danger" id="submit_return_btn" disabled>Process Return</button>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </div>
+    <?php endif; ?>
+
     <script src="assets/js/main.js?v=<?php echo time(); ?>"></script>
 
     <!-- View Invoice Modal -->
@@ -4513,7 +5091,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         <div class="row g-3 mb-4">
                             <div class="col-md-4">
                                 <label class="form-label fw-bold" data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></label>
-                                <select name="customer_id" class="form-select" required>
+                                <select name="customer_id" class="form-select select2" required>
                                     <option value="">---</option>
                                     <?php foreach ($data['customers_list'] as $c): ?>
                                     <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
@@ -4613,7 +5191,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         <div class="row g-3 mb-4">
                             <div class="col-md-4">
                                 <label class="form-label fw-bold" data-en="<?= $page === 'sales' ? 'Customer' : 'Supplier' ?>" data-ar="<?= $page === 'sales' ? 'العميل' : 'المورد' ?>"><?= $page === 'sales' ? 'Customer' : 'Supplier' ?></label>
-                                <select name="customer_id" id="edit_customer_id" class="form-select" required>
+                                <select name="customer_id" id="edit_customer_id" class="form-select select2" required>
                                     <option value="">---</option>
                                     <?php foreach ($data['customers_list'] as $c): ?>
                                     <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
@@ -4712,7 +5290,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         <div class="row g-3 mb-4">
                             <div class="col-md-4">
                                 <label class="form-label fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
-                                <select name="customer_id" class="form-select" required>
+                                <select name="customer_id" class="form-select select2" required>
                                     <option value="">---</option>
                                     <?php foreach ($data['customers_list'] as $c): ?>
                                     <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
@@ -4792,7 +5370,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         <div class="row g-3 mb-4">
                             <div class="col-md-3">
                                 <label class="form-label fw-bold" data-en="Customer" data-ar="العميل">Customer</label>
-                                <select name="customer_id" id="edit_quot_customer_id" class="form-select" required>
+                                <select name="customer_id" id="edit_quot_customer_id" class="form-select select2" required>
                                     <option value="">---</option>
                                     <?php foreach ($data['customers_list'] as $c): ?>
                                     <option value="<?= $c['id'] ?>"><?= htmlspecialchars($c['name']) ?></option>
@@ -5112,7 +5690,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         </div>
                         <div class="mb-3">
                             <label class="form-label fw-bold" data-en="Payment Method" data-ar="طريقة الدفع">Payment Method</label>
-                            <select name="payment_method" class="form-select" required>
+                            <select name="payment_method" class="form-select select2" required>
                                 <option value="Cash">Cash</option>
                                 <option value="Card">Card</option>
                                 <option value="Bank Transfer">Bank Transfer</option>
@@ -5218,7 +5796,7 @@ document.addEventListener('DOMContentLoaded', function() {
                         </div>
                         <div id="creditCustomerSection" class="mt-2 pt-2 border-top" style="display:none;">
                             <label class="form-label smaller fw-bold mb-1">Select Credit Customer</label>
-                            <select id="paymentCreditCustomer" class="form-select form-select-sm" onchange="cart.syncCustomer(this.value)">
+                            <select id="paymentCreditCustomer" class="form-select form-select-sm select2" onchange="cart.syncCustomer(this.value)">
                                 <option value="">--- Select Customer ---</option>
                                 <?php foreach ($customers as $c): ?>
                                 <option value="<?= $c['id'] ?>" data-search="<?= htmlspecialchars(strtolower($c['name'] . ' ' . ($c['phone'] ?? ''))) ?>"><?= htmlspecialchars($c['name']) ?> (<?= htmlspecialchars($c['phone'] ?? '') ?>)</option>
@@ -5901,6 +6479,59 @@ document.addEventListener('DOMContentLoaded', function() {
         document.body.classList.remove('printing-receipt');
         location.reload();
     }
+
+    <?php if ($page === 'dashboard'): ?>
+    const monthlyData = <?= json_encode($data['monthly_sales']) ?>;
+    const yearlyData = <?= json_encode($data['yearly_sales']) ?>;
+    
+    const ctx = document.getElementById('salesChart').getContext('2d');
+    let salesChart = new Chart(ctx, {
+        type: 'line',
+        data: {
+            labels: monthlyData.map(d => d.label),
+            datasets: [{
+                label: 'Sales (OMR)',
+                data: monthlyData.map(d => d.total),
+                borderColor: '#0d6efd',
+                backgroundColor: 'rgba(13, 110, 253, 0.1)',
+                fill: true,
+                tension: 0.4
+            }]
+        },
+        options: {
+            responsive: true,
+            maintainAspectRatio: false,
+            plugins: {
+                legend: { display: false }
+            },
+            scales: {
+                y: {
+                    beginAtZero: true,
+                    ticks: {
+                        callback: function(value) { return 'OMR ' + value.toFixed(3); }
+                    }
+                }
+            }
+        }
+    });
+
+    document.getElementById('btnMonthly').addEventListener('click', function() {
+        this.classList.add('active');
+        document.getElementById('btnYearly').classList.remove('active');
+        salesChart.data.labels = monthlyData.map(d => d.label);
+        salesChart.data.datasets[0].data = monthlyData.map(d => d.total);
+        salesChart.update();
+    });
+
+    document.getElementById('btnYearly').addEventListener('click', function() {
+        this.classList.add('active');
+        document.getElementById('btnMonthly').classList.remove('active');
+        salesChart.data.labels = yearlyData.map(d => d.label);
+        salesChart.data.datasets[0].data = yearlyData.map(d => d.total);
+        salesChart.update();
+    });
+    <?php endif; ?>
+
     </script>
 </body>
 </html>