feat: initial elysium idle game prototype

Sets up the full monorepo with pnpm workspaces. Includes shared types
package, Hono API with Discord OAuth/JWT auth, Prisma v6 + MongoDB
Atlas, and React + Vite frontend with game loop, five tabs, and
Discord-linked save/load.

apps/api/src/routes/profile.ts

@@ -0,0 +1,31 @@
+import type { GameState } from "@elysium/types";
+import { Hono } from "hono";
+import { prisma } from "../db/client.js";
+
+export const profileRouter = new Hono();
+
+profileRouter.get("/:discordId", async (context) => {
+  const { discordId } = context.req.param();
+
+  const [player, gameStateRecord] = await Promise.all([
+    prisma.player.findUnique({ where: { discordId } }),
+    prisma.gameState.findUnique({ where: { discordId } }),
+  ]);
+
+  if (!player) {
+    return context.json({ error: "Player not found" }, 404);
+  }
+
+  const state = gameStateRecord?.state as unknown as GameState | undefined;
+  const prestigeCount = state?.prestige.count ?? 0;
+
+  return context.json({
+    characterName: player.characterName,
+    username: player.username,
+    avatar: player.avatar ?? null,
+    prestigeCount,
+    totalGoldEarned: player.totalGoldEarned,
+    totalClicks: player.totalClicks,
+    createdAt: player.createdAt,
+  });
+});