Detailed wiki content repair: Setup

Setup.md

@@ -0,0 +1,23 @@
+# Setup
+
+## Proven Setup Signals
+
+| Signal | Detail |
+|---|---|
+| package.json | name=sacred-villas; scripts=dev, dev:client, dev:api, build, lint, preview; deps=@stripe/react-stripe-js, @stripe/stripe-js, cors, dotenv, express, framer-motion, react, react-dom, react-router-dom, stripe |
+| README files | README.md |
+
+## Setup Path
+
+- Install Node dependencies with the package manager used by the repo, then run the relevant script from package.json.
+
+## Environment Rules
+
+- Keep local secrets out of Git.
+- Put generated build output outside source control.
+- Prefer a clean checkout when validating setup instructions.
+- Record the exact command that works in the readiness issue before closing it.
+
+## Current Gaps
+
+- No setup gaps were inferred from inspected evidence.