Harden local setup and development startup

package.json

@@ -5,14 +5,19 @@
   "type": "module",
   "description": "Visual scheduling and business management app for owners and employees",
   "scripts": {
+    "setup": "node scripts/setup.mjs",
+    "dev:background": "node scripts/launch-dev.mjs",
+    "predev": "node scripts/preflight.mjs --ports=3000,5173",
     "dev": "concurrently -k -n SERVER,WEB -c blue,magenta \"npm:dev:server\" \"npm:dev:web\"",
-    "dev:server": "tsx watch server/index.ts",
+    "dev:server": "node scripts/run-tsx.mjs watch server/index.ts",
     "dev:web": "vite",
+    "prebuild": "node scripts/preflight.mjs",
     "build": "tsc -b && vite build",
-    "start": "cross-env NODE_ENV=production tsx server/index.ts",
+    "prestart": "node scripts/preflight.mjs --ports=3000",
+    "start": "cross-env NODE_ENV=production node scripts/run-tsx.mjs server/index.ts",
     "typecheck": "tsc -b --noEmit",
     "lint": "eslint . --ext ts,tsx",
-    "seed": "tsx server/scripts/seed.ts",
+    "seed": "node scripts/run-tsx.mjs server/scripts/seed.ts",
     "test:e2e": "node e2e-test.mjs",
     "test:admin": "node admin-test.mjs",
     "audit:visual": "node visual-audit.mjs"