Polish + activity feed + plugin image
Welcome banner — redesigned with gradient background, sparkle icon, gold bottom accent, proper spacing. Looks premium in both dark and light themes.
Rarity borders boosted — common, uncommon, rare, epic card borders changed to 2px solid with stronger opacity + box-shadow. All 4 tiers now clearly visible. Legendary and mythic untouched (already looked good).
Activity feed privacy — now filters ALL entries unconditionally. Previously, selecting a specific user in the dropdown bypassed the privacy check, showing hidden users' old activity. The filter now applies regardless of query parameters.
Plugin catalogue image — the puzzle piece default is replaced with the blue achievement badge from the README. Shows in Dashboard → Plugins and the plugin catalogue.