Account Legacy v0.4.5.1 — UI Layout Polish

This is an ADDON-ONLY update on top of the working v0.4.5 server/module.

Install:
1. Replace World of Warcraft\Interface\AddOns\AccountLegacy with the AccountLegacy folder from this package.
2. /reload or restart WoW.

No worldserver rebuild.
No SQL update.
No config change.

Main changes:
- ~15% smaller scrollable page content without changing the outer window size.
- Outland Netherforged bar is now the 60→70 journey only.
- Outland gains Next Netherforged / Next Crusade milestone cards.
- Azeroth Current Benefits restyled closer to the Outland card presentation.
- Outland Mastery drill-down/filter interactions preserve scroll position instead of jumping to the top.
