feat: achievement name in toast, parse earned achievements, loot item tooltips

- Parse SMSG_ALL_ACHIEVEMENT_DATA on login to populate earnedAchievements_ set
- Pass achievement name through callback so toast shows name instead of ID
- Add renderItemTooltip(ItemQueryResponseData) overload for loot/non-inventory contexts
- Loot window now shows full item tooltip on hover (stats, sell price, bind type, etc.)

include/ui/inventory_screen.hpp

@@ -96,6 +96,7 @@ private:
     std::unordered_map<uint32_t, VkDescriptorSet> iconCache_;
 public:
     VkDescriptorSet getItemIcon(uint32_t displayInfoId);
+    void renderItemTooltip(const game::ItemQueryResponseData& info);
 private:
 
     // Character model preview