fix web config

web/src/build.ts

@@ -100,6 +100,22 @@ function buildSite(site: SiteConfig, pages: ReturnType<typeof loadPages>): void
   writeFileSync(metadataPath, clientMetadata(site))
   console.log(`  -> .well-known/client-metadata.json`)
 
+  // Generate apple-app-site-association for Universal Links (if appId is set)
+  if (site.appId) {
+    const aasa = {
+      applinks: {
+        apps: [],
+        details: [{
+          appID: site.appId,
+          paths: ['/oauth/callback', '/oauth/callback/']
+        }]
+      }
+    }
+    const aasaPath = join(siteDir, '.well-known/apple-app-site-association')
+    writeFileSync(aasaPath, JSON.stringify(aasa, null, 2))
+    console.log(`  -> .well-known/apple-app-site-association`)
+  }
+
   // Copy assets
   copyAssets(site)
 }