Add public profiles and cosmetic shop

shared/profile-cosmetics.ts

@@ -0,0 +1,41 @@
+import { z } from "zod";
+import { profileCosmeticIds } from "./profile-cosmetic-ids";
+
+export const profileCosmeticIdSchema = z.enum(profileCosmeticIds);
+export type { ProfileCosmeticId } from "./profile-cosmetic-ids";
+
+export const profileCosmeticActionSchema = z.discriminatedUnion("action", [
+  z
+    .object({
+      action: z.literal("purchase"),
+      cosmeticId: profileCosmeticIdSchema,
+    })
+    .strict(),
+  z
+    .object({
+      action: z.literal("equip"),
+      cosmeticId: profileCosmeticIdSchema.nullable(),
+    })
+    .strict(),
+]);
+
+export const cosmeticShopStateSchema = z
+  .object({
+    balance: z.number().int().nonnegative(),
+    owned: z.array(profileCosmeticIdSchema),
+    equipped: profileCosmeticIdSchema.nullable(),
+    catalog: z.array(
+      z
+        .object({
+          id: profileCosmeticIdSchema,
+          name: z.string().min(1).max(48),
+          description: z.string().min(1).max(160),
+          price: z.number().int().positive(),
+          rarity: z.enum(["common", "rare", "epic", "legendary"]),
+        })
+        .strict(),
+    ),
+  })
+  .strict();
+
+export type CosmeticShopState = z.infer<typeof cosmeticShopStateSchema>;