- Rewrote screenshot-feature-flags.ts: removed stale 'unstable' tier
references (relay-members, identity-archive), updated close button
selector to settings-back-to-app
- Deleted all old screenshots + feature-flags-tour/ artifacts
- Regenerated 13 fresh screenshots matching current UI
- Added Experiments nav group to SettingsView (was defined but missing
from settingsNavGroups)
- Registered test in playwright.config.ts smoke project
Signed-off-by: Taylor Ho <taylorkmho@gmail.com>