xfrm count under avatar

Features ✅ Displays XFRM resource count in postbit ✅ Clickable link to /resources/authors/USERNAME.ID/ ✅ Automatically hidden when count is 0 ✅ Phrase-based label (fully customizable & translatable) ✅ Upgrade safe (template mod + class extension) ✅ Lightweight and performance-friendly ✅ No core...