Clean welcome banner + self-view activity feed
Welcome banner — redesigned as minimal frosted glass with a thin gold left accent bar. No sparkle emoji, just clean text with backdrop blur. Looks premium in both dark and light themes.
Activity feed self-view — users who hide from the activity feed can now still see their own entries. The privacy filter only excludes other users' hidden entries, not your own. So if you toggle "Hide from activity feed", you disappear from everyone else's view but your own activity tab still shows your history.