1.4.0: not_found, server-only response options, compression

- Server functions can return not_found: true to render the 404 page
  with status 404.
- Page components and window.__PAGE_PROPS__ (and HMR updates) only get
  props, query, url and error. response_options, redirect, cache settings
  and res_transform stay on the server, so cookies and private headers no
  longer end up in the HTML. BunextPageProps is narrowed to match
  (breaking for code that read server-only fields from component props).
- response_options headers go through a Headers object, so repeated
  headers such as several Set-Cookie survive.
- Redirects: status_code wins over permanent; response_options headers
  and res_transform apply to redirects too.
- Gzip for compressible text responses; compress: false to turn it off.
- Files the router matches but never bundles (.server.ts, __root,
  excluded paths and directories) return 404 instead of looping through
  dev rebuild retries.
- Missing public files return 404 rather than 403, so dotted page paths
  like /users/john.doe fall through to pages again.
- importFresh detects rewrites within the filesystem's mtime granularity.
- README: self-hosted React (not esm.sh), snake_case option names, static
  file serving, cache headers, the new options.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

dist/functions/server/server-post-build-fn.js

@@ -1,3 +1,4 @@
+import grabClientPageProps from "../../utils/grab-client-page-props";
 import _ from "lodash";
 import grabPageComponent from "./web-pages/grab-page-component";
 /**
@@ -102,7 +103,7 @@ export default async function serverPostBuildFn(params) {
             delete final_artifact.target_map;
         }
         // Always replace so prior error props cannot linger
-        final_artifact.page_props = serverRes || {};
+        final_artifact.page_props = grabClientPageProps(serverRes);
         try {
             let final_data = {};
             if (global.BUNEXT_ROOT_FILE_UPDATED) {