Fix: Inventory Asset Detection

[GODrums]

Steam moved stored asset data into two separate child inventories (separation of trade protected and normal items). This causes the extension to completely fail any item detection in the item grid:

This PR addresses this by adapting the way asset data is retrieved from the stored g_ActiveInventory.

---

Note

Update inventory asset lookup to use app-wide child inventories with trade-protected detection, and align types/constants.

• Inventory item resolution:
  • Determine contextId via new isTradeProtected flag on ItemHolderMetadata (checks provisional_item).
  • Fetch assets from g_ActiveInventory.m_rgChildInventories[contextId].m_rgAssets[assetId].description instead of top-level.
• Types:
  • Introduce CAppwideInventory with m_rgChildInventories and m_rgContextIds; add m_parentInventory to CInventory.
  • Change global g_ActiveInventory type to CAppwideInventory.
• Constants:
  • Add ContextId.PROTECTED = 16.

^{Written by Cursor Bugbot for commit 6d6c7a2. Configure here.}

[Step7750]

Thanks @GODrums !