Added: vehicle creation

app/models/Vehicle.php

@@ -0,0 +1,49 @@
+<?php
+
+class Vehicle {
+    private $db;
+
+    public function __construct() {
+        $this->db = Database::getInstance()->getConnection();
+    }
+
+    public function create($data) {
+        try{
+            $stmt = $this->db->prepare("
+                INSERT INTO vehicles (user_id, name, registration_plate, fuel_type, note, created_at)
+                VALUES (?, ?, ?, ?, ?, NOW())
+            ");
+
+            $stmt->bind_param(
+                "issss",
+                $data['user_id'],
+                $data['name'],
+                $data['registration_plate'],
+                $data['fuel_type'],
+                $data['note'],
+            );
+
+            if ($stmt->execute()) {
+                return true;
+            } else {
+                return "Error: " . $stmt->error;
+            }
+        } catch(mysqli_sql_exception $e) {
+            return $e->getMessage();
+        }
+    }
+
+    public function getVehiclesByUser($userId) {
+        $stmt = $this->db->prepare("SELECT id, name, registration_plate, fuel_type, note, created_at FROM vehicles WHERE user_id = ?");
+        $stmt->bind_param("i", $userId);
+        $stmt->execute();
+        $result = $stmt->get_result();
+
+        $vehicles = [];
+        while ($row = $result->fetch_assoc()) {
+            $vehicles[] = $row;
+        }
+        
+        return $vehicles;
+    }
+}