Araç Ekleme (Düzenleme) Fix

src/server.js

@@ -1149,7 +1149,7 @@ app.put('/api/vehicles', (req, res) => {
 			current_fuel: parseInt(current_fuel) || 0,
 			yazlik_mukannen: parseInt(yazlik_mukannen) || 0,
 			kislik_mukannen: parseInt(kislik_mukannen) || 0,
-			status: status.trim(),
+			status: (status || 'Aktif').trim(),
 			driver_id: driver_id ? parseInt(driver_id) : null,
 			driver_name: driver_name ? driver_name.trim() : null
 		};
@@ -1160,6 +1160,12 @@ app.put('/api/vehicles', (req, res) => {
 		});
 
 	} catch (error) {
+		console.error('❌ PUT /api/vehicles error:', error);
+		console.error('Error details:', {
+			message: error.message,
+			stack: error.stack,
+			body: req.body
+		});
 		res.status(500).json({ message: 'Sunucu hatası.' });
 	}
 });