feat: add card skins support

apps/web/components/faces/line.tsx

@@ -0,0 +1,17 @@
+import type { CardFaceProps } from "./types";
+
+/** 卡面：斜线纹理 + 右上角光晕 */
+export function LineFace(_: CardFaceProps) {
+  return (
+    <>
+      <div
+        className="absolute inset-0 opacity-[0.07]"
+        style={{
+          backgroundImage:
+            "repeating-linear-gradient(135deg, #fff 0px, #fff 1px, transparent 1px, transparent 12px)",
+        }}
+      />
+      <div className="absolute -right-10 -top-10 size-48 rounded-full bg-white/15 blur-2xl" />
+    </>
+  );
+}