test(e2e): stabilize activity feed + Clerk helper timeouts

frontend/cypress.config.ts

@@ -14,6 +14,13 @@ export default defineConfig({
     baseUrl: "http://localhost:3000",
     specPattern: "cypress/e2e/**/*.cy.{js,jsx,ts,tsx}",
     supportFile: "cypress/support/e2e.ts",
+    // Clerk helpers perform async work inside `cy.then()`. CI can be slow enough
+    // that Cypress' 4s default command timeout flakes.
+    defaultCommandTimeout: 20_000,
+    retries: {
+      runMode: 2,
+      openMode: 0,
+    },
     setupNodeEvents(on, config) {
       return clerkSetup({ config });
     },