refactor(frontend): replace React Router BFF with Wouter SPA

Remove React Router 7 SSR/BFF architecture (server-side loaders,
actions, sessions, remix-auth) and replace with a client-side SPA
using Wouter for routing and cookie-based JWT auth.

- Replace reactRouter() Vite plugin with @vitejs/plugin-react
- Add index.html + app/main.tsx as SPA entry points
- Add Wouter routing with auth guards (ProtectedRoute/PublicOnlyRoute)
- Add client-side auth (app/auth.ts) and useAuth hook
- Migrate all route files to app/pages/ with client-side data fetching
- Update NavigateLink and GolfPlayAppGaming to use Wouter Link
- Remove .server/, routes/, root.tsx, react-router.config.ts
- Clean up tsconfig.json (remove .react-router references)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

4 files changed, 45 insertions, 5 deletions

diff --git a/frontend/app/components/GolfPlayApps/GolfPlayAppGaming.tsx b/frontend/app/components/GolfPlayApps/GolfPlayAppGaming.tsx
index 9eab91e..025e676 100644
--- a/frontend/app/components/GolfPlayApps/GolfPlayAppGaming.tsx
+++ b/frontend/app/components/GolfPlayApps/GolfPlayAppGaming.tsx
@@ -1,6 +1,6 @@
 import { useAtomValue } from "jotai";
 import React, { useRef, useState } from "react";
-import { Link } from "react-router";
+import { Link } from "wouter";
 import {
 	calcCodeSize,
 	gamingLeftTimeSecondsAtom,
diff --git a/frontend/app/components/NavigateLink.tsx b/frontend/app/components/NavigateLink.tsx
index c4ee7aa..16c7858 100644
--- a/frontend/app/components/NavigateLink.tsx
+++ b/frontend/app/components/NavigateLink.tsx
@@ -1,10 +1,18 @@
-import { Link, LinkProps } from "react-router";
+import { Link } from "wouter";
 
-export default function NavigateLink(props: LinkProps) {
+export default function NavigateLink({
+	to,
+	children,
+}: {
+	to: string;
+	children: React.ReactNode;
+}) {
 	return (
 		<Link
-			{...props}
+			to={to}
 			className="text-lg text-white bg-sky-600 px-4 py-2 border-2 border-sky-50 rounded-sm transition duration-300 hover:bg-sky-500 focus:ring-3 focus:ring-sky-400 focus:outline-hidden"
-		/>
+		>
+			{children}
+		</Link>
 	);
 }
diff --git a/frontend/app/components/ProtectedRoute.tsx b/frontend/app/components/ProtectedRoute.tsx
new file mode 100644
index 0000000..3aeaebc
--- /dev/null
+++ b/frontend/app/components/ProtectedRoute.tsx
@@ -0,0 +1,16 @@
+import { Redirect } from "wouter";
+import { useAuth } from "../hooks/useAuth";
+
+export default function ProtectedRoute({
+	children,
+}: {
+	children: React.ReactNode;
+}) {
+	const { isLoggedIn } = useAuth();
+
+	if (!isLoggedIn) {
+		return <Redirect to="/login" />;
+	}
+
+	return <>{children}</>;
+}
diff --git a/frontend/app/components/PublicOnlyRoute.tsx b/frontend/app/components/PublicOnlyRoute.tsx
new file mode 100644
index 0000000..2527918
--- /dev/null
+++ b/frontend/app/components/PublicOnlyRoute.tsx
@@ -0,0 +1,16 @@
+import { Redirect } from "wouter";
+import { useAuth } from "../hooks/useAuth";
+
+export default function PublicOnlyRoute({
+	children,
+}: {
+	children: React.ReactNode;
+}) {
+	const { isLoggedIn } = useAuth();
+
+	if (isLoggedIn) {
+		return <Redirect to="/dashboard" />;
+	}
+
+	return <>{children}</>;
+}