feat: enhance admin control panel with KPI charts, inline inventory editing, lead CRM and settings

includes/db.php

@@ -55,11 +55,35 @@ class TireStore {
         $entry['id'] = 'CNS-' . (count($data['consultations'] ?? []) + 101);
         $entry['created_at'] = date('Y-m-d H:i');
         $entry['status'] = 'جدید';
+        $entry['admin_note'] = '';
         $data['consultations'][] = $entry;
         self::saveData($data);
         return $entry;
     }
 
+    public static function updateConsultationStatus($id, $status, $note = '') {
+        $data = self::getData();
+        foreach ($data['consultations'] as &$c) {
+            if ($c['id'] === $id) {
+                $c['status'] = $status;
+                if ($note !== '') {
+                    $c['admin_note'] = $note;
+                }
+                self::saveData($data);
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static function deleteConsultation($id) {
+        $data = self::getData();
+        $data['consultations'] = array_values(array_filter($data['consultations'], function($c) use ($id) {
+            return $c['id'] !== $id;
+        }));
+        return self::saveData($data);
+    }
+
     public static function addTire($tire) {
         $data = self::getData();
         $data['tires'][] = $tire;
@@ -86,4 +110,20 @@ class TireStore {
         }));
         return self::saveData($data);
     }
+
+    public static function getSettings() {
+        $data = self::getData();
+        return $data['settings'] ?? [
+            "site_phone" => "021-88889900",
+            "emergency_phone" => "09123456789",
+            "announcement" => "تضمین اصالت کالا و گارانتی معتبر شرکتی تا ۶۰ ماه | تاریخ تولید روز (2026)",
+            "central_address" => "تهران، خیابان آزادی، تقاطع یادگار امام، مجتمع تایر قاسمی"
+        ];
+    }
+
+    public static function updateSettings($settings) {
+        $data = self::getData();
+        $data['settings'] = array_merge($data['settings'] ?? [], $settings);
+        return self::saveData($data);
+    }
 }