Update on auto setup

scripts/precheck.mjs

@@ -1,9 +1,16 @@
+// ── Port Precheck ──────────────────────────────────────────────────
+// Kills any existing processes on ports 3001, 3006, 3007, 3008.
+// These are the AI server, Next.js frontend, Signaling server, and
+// Python scraper respectively.
+// Runs before anything else starts to avoid EADDRINUSE errors.
+
 import { execSync } from "node:child_process"
 import { platform } from "node:os"
 
 const PORTS = [3001, 3006, 3007, 3008]
 
 if (platform() === "win32") {
+  // Windows: use netstat + findstr to find listening PIDs, then taskkill
   for (const port of PORTS) {
     try {
       const out = execSync(`netstat -ano | findstr "LISTENING" | findstr ":${port} "`, { encoding: "utf8", timeout: 5000 })
@@ -18,6 +25,7 @@ if (platform() === "win32") {
     } catch {}
   }
 } else {
+  // Linux/Mac: use lsof -ti to find PIDs, then kill -9
   for (const port of PORTS) {
     try {
       const pid = execSync(`lsof -ti:${port} 2>/dev/null`, { encoding: "utf8", timeout: 5000 }).trim()