Playwright critical-flow suite supplied in tests/Integration/browser.cjs.
Attempted Chromium launch using /usr/bin/chromium.
FAILED BEFORE NAVIGATION: process_singleton_posix.cc socket() failed: Operation not permitted (UNIX socket creation denied by execution sandbox).
Browser execution, JavaScript UI behavior, screenshots, responsive layout and pixel matching are UNVERIFIED. HTTP tests are reported separately and do not replace browser tests.
