CobbleMarket - Market ID card background
========================================

Put your ID card background image HERE (plain file name, no path), then put that
file name into config/cobblemarket.json -> "idCardBackground".

- PNG only. Max 1MB, max 2048x2048 pixels per image.
- The card is drawn at a fixed size on screen. The image is scaled so that its
  bottom "width x 9/16" part fills the card exactly; anything above that is an
  overflow decoration drawn above the card (e.g. a Pokemon sitting on the card's
  top edge). The built-in image deliberately leaves that area blank, so server
  packs can put their own mascot / title there.
- Leave "idCardBackground" blank to use the mod's built-in background.
- Images are read on demand (no restart needed); replacing one takes effect the
  next time a player opens the ID card (overwriting the same file in place works too).

市场 ID 卡背景图目录
====================
把 ID 卡的背景图放在这里（**只写文件名，不带路径**），
然后把文件名填进 `config/cobblemarket.json` 的 `idCardBackground`。

- 只认 PNG，单张不超过 1MB、像素不超过 2048×2048。
- 卡片在屏幕上按固定尺寸绘制。图按「**从底边往上、宽 × 9/16 那块 = 卡片本体**」缩放：
  那块正好填满卡片，上面多出来的部分是**溢出装饰**，会画在卡片上方
  （比如一只趴在卡片顶边的精灵）。模组内置的那张**刻意把这块留空**，
  留给服主放自己的吉祥物 / 标题。
- `idCardBackground` **留空 = 用模组内置的背景图**。
- 读图是按需的（改图不用重启），换图对下一次打开 ID 卡生效（就地覆盖同名文件也算）。