fix(defaultViewport): clamp invalid zoom values

examples/vite-app/cypress/e2e/figma.cy.ts

@@ -5,7 +5,6 @@ describe('Figma Flow UI', () => {
 
   it('renders a flow with three nodes', () => {
     cy.get('.react-flow__renderer');
-    cy.get('.react-flow-basic-example'); // check if className prop works
     cy.get('.react-flow__node').should('have.length', 4);
     cy.get('.react-flow__edge').should('have.length', 2);
     cy.get('.react-flow__node').children('.react-flow__handle');

examples/vite-app/src/examples/Figma/index.tsx

@@ -1,4 +1,4 @@
-import ReactFlow, { Background, BackgroundVariant, Node, Edge, SelectionMode } from 'reactflow';
+import ReactFlow, { Background, BackgroundVariant, Node, Edge, SelectionMode, Viewport } from 'reactflow';
 
 const MULTI_SELECT_KEY = ['Meta', 'Shift'];