feat(folio-web): web sample app + CDP spec tests (#36)

* fix(runner): allow nil connection for web platform

* fix(testrun): skip SDK handshake for web platform

* feat(folio-web): add React/Vite web sample app

* feat(folio-web): add sanderling spec

* fix(chrome): use InsertText for multi-char text input

* feat(hierarchy): add Screen field populated from sanderling-screen attr

* fix(chrome): auto-detect viewport from CSS vars, fix InputText accumulation, expose route as screen

* fix(runner): fall back to hierarchy root screen when snapshot screen is empty

* fix(folio-web): broaden loggedIn extractor to all authenticated pages

examples/folio-web/src/auth.ts

@@ -0,0 +1,9 @@
+export const DEMO_EMAIL = '[email protected]'
+export const DEMO_PASSWORD = 'ledger123'
+
+export function checkCredentials(email: string, password: string): boolean {
+  return (
+    email.trim().toLowerCase() === DEMO_EMAIL &&
+    password === DEMO_PASSWORD
+  )
+}