feat: add public player profile page

apps/web/src/App.tsx

@@ -2,6 +2,12 @@ import { useState } from "react";
 import { GameProvider } from "./context/GameContext.js";
 import { GameLayout } from "./components/game/GameLayout.js";
 import { LoginPage } from "./components/game/LoginPage.js";
+import { ProfilePage } from "./components/game/ProfilePage.js";
+
+const getProfileDiscordId = (): string | null => {
+  const match = /^\/profile\/(\d+)$/.exec(window.location.pathname);
+  return match?.[1] ?? null;
+};
 
 const handleAuthCallback = (): boolean => {
   if (window.location.pathname !== "/auth/callback") {
@@ -27,6 +33,11 @@ const isAuthenticated = (): boolean => {
 export const App = (): React.JSX.Element => {
   const [loggedIn, setLoggedIn] = useState(isAuthenticated);
 
+  const profileDiscordId = getProfileDiscordId();
+  if (profileDiscordId) {
+    return <ProfilePage discordId={profileDiscordId} />;
+  }
+
   if (!loggedIn) {
     return <LoginPage onLogin={() => { setLoggedIn(true); }} />;
   }