fix: serve data for canonical documentation URLs

Copy prerendered route data to the trailing-slash paths requested by React Router so search results can navigate without decoding the HTML fallback.

Author: fhammerschmidt

apps/docs/react-router.config.mjs

@@ -19,6 +19,17 @@ export default {
     },
   },
   buildEnd: async () => {
+    // Cloudflare serves prerendered pages at trailing-slash URLs. React Router
+    // requests /page/_.data for those URLs, while prerendering emits /page.data.
+    for (const dataFile of fs.globSync("**/*.data", {
+      cwd: "./build/client",
+    })) {
+      const routeDir = `./build/client/${dataFile.slice(0, -".data".length)}`;
+      if (fs.existsSync(`${routeDir}/index.html`)) {
+        fs.copyFileSync(`./build/client/${dataFile}`, `${routeDir}/_.data`);
+      }
+    }
+
     fs.rmSync("./out", { recursive: true, force: true });
     fs.cpSync("./build/client", "./out", { recursive: true });
   },