Fix build lags

dist/functions/bunext-init.d.ts

@@ -3,7 +3,6 @@ import type { FileSystemRouter, Server } from "bun";
 import { type DirNames } from "../utils/grab-dir-names";
 import type { BuildContext } from "esbuild";
 import grabConstants from "../utils/grab-constants";
-import { type FSWatcher } from "fs";
 /**
  * # Declare Global Variables
  */
@@ -24,7 +23,7 @@ declare global {
         [k: string]: BundlerCTXMap;
     };
     var BUNEXT_BUNDLER_REBUILDS: 0;
-    var BUNEXT_PAGES_SRC_WATCHER: FSWatcher | undefined;
+    var BUNEXT_PAGES_SRC_WATCHER: any;
     var BUNEXT_CURRENT_VERSION: string | undefined;
     var BUNEXT_PAGE_FILES: PageFiles[];
     var BUNEXT_ROOT_FILE_UPDATED: boolean;
@@ -47,6 +46,13 @@ declare global {
     var BUNEXT_BUILD_FAILED: boolean;
     var BUNEXT_CONSTANTS: ReturnType<typeof grabConstants>;
     var BUNEXT_MAIN_CTX_BUILD_STARTS: number;
+    /**
+     * Resolves when the one-time dev startup build (hydration + SSR for all
+     * pages) has completed. The dev server starts listening before this
+     * resolves; page requests await it so they never render against
+     * half-built modules.
+     */
+    var BUNEXT_INITIAL_BUILD_PROMISE: Promise<void> | undefined;
 }
 type Params = {
     build_only?: boolean;