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/utils/import-fresh.js

@@ -2,8 +2,9 @@ import { existsSync, statSync } from "fs";
 import path from "path";
 import isDevelopment from "./is-development";
 /**
- * File path -> mtime of the version currently held in Bun's module
- * registry (dev only).
+ * File path -> version (mtime, size, inode) of the module currently held
+ * in Bun's module registry (dev only). mtime alone misses rewrites within
+ * the filesystem's timestamp granularity (several ms on ext4).
  */
 const loaded_versions = new Map();
 /**
@@ -20,18 +21,19 @@ export default async function importFresh(file_path) {
     if (!isDevelopment()) {
         return import(file_path);
     }
-    let mtime;
+    let version;
     try {
-        mtime = statSync(file_path).mtimeMs;
+        const stat = statSync(file_path);
+        version = `${stat.mtimeMs}:${stat.size}:${stat.ino}`;
     }
     catch { }
     if (loaded_versions.has(file_path) &&
-        loaded_versions.get(file_path) !== mtime) {
+        loaded_versions.get(file_path) !== version) {
         evictModule(file_path);
     }
     try {
         const mod = await import(file_path);
-        loaded_versions.set(file_path, mtime);
+        loaded_versions.set(file_path, version);
         return mod;
     }
     catch (error) {