Revalidating cache on app assets; site title survives SPA navigation

pkg files keep stable names across releases, so an uncontrolled
browser cache could pair last release's wasm with the new server's
server-fn wire format - every page then renders its error branch
(redoal.com's 'Nothing here' after v0.2.0). Cache-Control: no-cache
on /pkg and /yes.js makes clients revalidate (a 304 per load) instead
of guessing. The content-declared site title also moves out of the
question Suspense: remounting with each navigation lost the
leptos_meta race to the compile-time fallback, flipping redoal.com's
tab to 'uhhm' on the first client-side nav.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app.rs

@@ -89,6 +89,18 @@ fn QuestionPage() -> impl IntoView {
     let site = Resource::new(|| (), |_| get_site());
 
     view! {
+        // The content-declared site title lives OUTSIDE the question
+        // Suspense: tied to the per-page resource it unmounted on every
+        // SPA navigation and lost the leptos_meta race to App's
+        // compile-time SITE_NAME fallback (redoal.com flashing to
+        // "uhhm" on nav - and staying there). Out here it mounts once
+        // and covers every branch, NotFound included.
+        {move || {
+            site.get()
+                .and_then(|r| r.ok())
+                .and_then(|s| s.title)
+                .map(|t| view! { <Title text=t/> })
+        }}
         <Suspense fallback=|| {
             view! {
                 <main class="loading">
@@ -109,13 +121,6 @@ fn QuestionPage() -> impl IntoView {
                         Ok(Some(page)) => {
                             let current = user_res.and_then(|r| r.ok()).flatten();
                             view! {
-                                // A second <Title> outranks App's
-                                // SITE_NAME fallback only when content
-                                // actually declares one.
-                                {site_cfg
-                                    .title
-                                    .clone()
-                                    .map(|t| view! { <Title text=t/> })}
                                 <QuestionView
                                     question=page.question
                                     chain_gate=page.chain_gate