Add Discover page E2E tests with real API fixture data

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cypress/e2e/discoverMap.cy.js

@@ -0,0 +1,46 @@
+import { loginWithFixtures } from '../support/intercept';
+
+describe('Discover Map Page', () => {
+  beforeEach(() => {
+    loginWithFixtures();
+    // Suppress Cytoscape rendering errors in headless mode
+    cy.on('uncaught:exception', () => false);
+    cy.visit('/discover/log/297310264/map');
+    cy.wait('@getDiscover');
+  });
+
+  it('page loads and cytoscape container exists', () => {
+    cy.get('#cy').should('exist');
+  });
+
+  it('displays left sidebar buttons', () => {
+    // Visualization Setting, Filter, Traces buttons
+    cy.get('.material-symbols-outlined').contains('track_changes').should('exist');
+    cy.get('.material-symbols-outlined').contains('tornado').should('exist');
+    cy.get('.material-symbols-outlined').contains('rebase').should('exist');
+  });
+
+  it('displays right sidebar Summary button', () => {
+    cy.get('#sidebar_state').should('exist');
+    cy.get('#iconState').should('exist');
+  });
+
+  it('clicking Visualization Setting button toggles sidebar', () => {
+    // Click the track_changes icon (Visualization Setting)
+    cy.contains('span.material-symbols-outlined', 'track_changes').parent('li').click();
+    // SidebarView should open
+    cy.contains('Visualization Setting').should('be.visible');
+  });
+
+  it('clicking Summary button toggles sidebar', () => {
+    cy.get('#iconState').click();
+    // SidebarState should open with insights/stats
+    cy.contains('Summary').should('be.visible');
+  });
+
+  it('clicking Traces button toggles sidebar', () => {
+    cy.contains('span.material-symbols-outlined', 'rebase').parent('li').click();
+    // SidebarTraces should open
+    cy.contains('Traces').should('be.visible');
+  });
+});