copy(reader): Library page gets a title and a subtitle

marketing-site/pages/read/index.jsx

@@ -11,7 +11,7 @@ export default function ReadLibrary() {
         <title>Library · AIBook.fun reading demo</title>
         <meta
           name="description"
-          content="Preview library for AIBook.fun. The Real Estate chapter is open. The other verticals are still being written."
+          content="Library for the 2026 AIBook.fun field guide. Six verticals. One preview chapter open."
         />
         <meta name="viewport" content="width=device-width, initial-scale=1" />
       </Head>
@@ -21,11 +21,9 @@ export default function ReadLibrary() {
         <section className="section contents reader-library">
           <div className="wrap reader-wide">
             <span className="spec demo-chip">Reading demo · not the live book</span>
-            <h1 className="library-title">The 2026 library</h1>
+            <h1 className="library-title">Library</h1>
             <p className="library-lede">
-              Real Estate is the preview chapter. Two workflows, sample data only,
-              no live client file. The other verticals on this list are still being
-              written.
+              Six verticals for the 2026 edition.
             </p>
             <div className="toc">
               {LIBRARY.map((item) =>