Fix build lags

dist/functions/bunext-init.js

@@ -62,11 +62,21 @@ export default async function bunextInit(params) {
     }
     else if (is_dev) {
         log.build(`Building Modules ...`);
-        await allPagesESBuildContextBundler({
-            post_build_fn: async () => {
-                await serverPostBuildFn();
+        // Do NOT block on the full-site build: `Bun.serve` (or the start
+        // server) opens its port immediately and requests await
+        // BUNEXT_INITIAL_BUILD_PROMISE, so the site becomes reachable while
+        // the one-time compile still runs in the background.
+        const initial_build_promise = allPagesESBuildContextBundler({
+            post_build_fn: async (params) => {
+                await serverPostBuildFn(params);
             },
         });
+        global.BUNEXT_INITIAL_BUILD_PROMISE = initial_build_promise;
+        // Errors are logged (deduped) by the build pipeline itself; swallow
+        // the rejection here so it isn't an unhandled rejection.
+        initial_build_promise.catch(() => { });
+        // Start watching immediately so edits made during the initial build
+        // are not missed (rebuilds coalesce with the in-flight build).
         watcherEsbuildCTX();
     }
     else {