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/bundler/plugins/chunk-react.js

@@ -2,7 +2,7 @@
 import * as esbuild from "esbuild";
 import path from "path";
 import grabDirNames from "../../../utils/grab-dir-names";
-const { BUNEXT_VENDOR_DIR } = grabDirNames();
+import grabBunextPublicUrlPath from "../../../utils/grab-bunext-public-url-path";
 const REACT_MODULES = new Set([
     "react",
     "react-dom",
@@ -10,7 +10,6 @@ const REACT_MODULES = new Set([
     "react/jsx-runtime",
     "react/jsx-dev-runtime",
 ]);
-const VENDOR_BASE = "/.bunext/public/vendor";
 const REACT_ENTRIES = {
     react: `
     import React from "react";
@@ -52,9 +51,10 @@ const REACT_ENTRIES = {
 // Map bare specifier -> browser path
 function vendorPath(specifier) {
     const filename = specifier.replace(/\//g, "_") + ".js";
-    return `${VENDOR_BASE}/${filename}`;
+    return `${grabBunextPublicUrlPath()}/vendor/${filename}`;
 }
 function vendorOutfile(specifier) {
+    const { BUNEXT_VENDOR_DIR } = grabDirNames();
     const filename = specifier.replace(/\//g, "_") + ".js";
     return path.join(BUNEXT_VENDOR_DIR, filename);
 }