Add versioning to footer

src/components/global/Footer.tsx

@@ -1,5 +1,27 @@
+import pkg from "../../../package.json";
+
+const appVersion =
+  process.env.NEXT_PUBLIC_APP_VERSION ??
+  pkg.version;
+const gitSha =
+  process.env.NEXT_PUBLIC_GIT_SHA ??
+  process.env.VERCEL_GIT_COMMIT_SHA ??
+  process.env.GIT_COMMIT_SHA ??
+  "";
+const deployEnv =
+  process.env.NEXT_PUBLIC_DEPLOY_ENV ??
+  process.env.NODE_ENV ??
+  "unknown";
+const versionLabel = gitSha
+  ? `v${appVersion}+${gitSha.slice(0, 7)}`
+  : `v${appVersion}`;
+const envLabel = deployEnv === "production" ? "prod" : deployEnv;
+
 export default function Footer() {
   return (
-    <div>© 2026 by gaertan.art | All rights reserved</div>
+    <div className="flex items-center justify-between text-xs text-muted-foreground">
+      <span>© 2026 by gaertan.art | All rights reserved</span>
+      <span>{versionLabel} · {envLabel}</span>
+    </div>
   );
-}
+}