chore: rename middleware.ts → proxy.ts for Next.js 16

Next.js 16 renamed Middleware to Proxy. Same functionality,
just rename the file and the exported function.

Co-authored-by: dashboard <dashboard@miriad.systems>

Author: Miriad

middleware.ts proxy.tsmiddleware.ts renamed to proxy.ts

@@ -1,7 +1,7 @@
 import { createServerClient } from "@supabase/ssr";
 import { NextResponse, type NextRequest } from "next/server";
 
-export async function middleware(request: NextRequest) {
+export async function proxy(request: NextRequest) {
 	let supabaseResponse = NextResponse.next({ request });
 
 	const supabaseUrl = process.env.NEXT_PUBLIC_SUPABASE_URL;