fix(mikrotikApplyService, ServerModal): update default port for MikroTik connections to 80 and ensure proper number conversion for port input

frontend/src/components/server/ServerModal.jsx

@@ -588,9 +588,9 @@ function ServerModal({ show, mode = 'add', server, onSave, onClose, error: exter
                       <input
                         type="number"
                         className="form-control form-control-sm"
-                        value={localServer.mikrotikPort || '8728'}
+                        value={localServer.mikrotikPort || '80'}
                         onChange={(e) => handleFieldChange('mikrotikPort', e.target.value)}
-                        placeholder="8728"
+                        placeholder="80"
                       />
                     </div>
                     <div className="col-md-3">
@@ -627,7 +627,7 @@ function ServerModal({ show, mode = 'add', server, onSave, onClose, error: exter
                           const payload = hasPassword
                             ? {
                                 host: localServer.mikrotikHost || localServer.ip,
-                                port: localServer.mikrotikPort || 8728,
+                                port: localServer.mikrotikPort || 80,
                                 user: localServer.mikrotikUser || 'admin',
                                 password: localServer.mikrotikPassword,
                               }