feat(ui-test): Playwright ui tests helpers + per-test scenarios stage 1#2196

cjlg-soloio wants to merge 10 commits into

kagent-dev:mainkagent-dev/kagent:mainfrom

cjlg-soloio:feat(ui)--Playwright-tests-foundation-stage-2cjlg-soloio/kagent:feat(ui)--Playwright-tests-foundation-stage-2Copy head branch name to clipboard