♻️ Convierte initialize() y Application en async

`async_trait` se re-exporta desde `pagetop` y se añade al preludio; ya
no es necesario declararlo como dependencia en las extensiones.
`initialize()` es ahora verdaderamente `async` (con `.await`), y
`Application::new()` y `prepare()` pasan también a ser funciones
`async`.

tests/component_poweredby.rs

@@ -4,13 +4,13 @@ use pagetop::prelude::*;
 ///
 /// Los tests de este módulo renderizan componentes directamente con `Context::default()`, por lo
 /// que sólo necesitan el subsistema de localización y las extensiones registradas, no un router.
-fn setup() {
-    let _ = Application::new();
+async fn setup() {
+    Application::new().await;
 }
 
 #[pagetop::test]
 async fn poweredby_default_shows_only_pagetop_recognition() {
-    setup();
+    setup().await;
 
     let mut p = PoweredBy::default();
     let html = p.render(&mut Context::default());
@@ -24,7 +24,7 @@ async fn poweredby_default_shows_only_pagetop_recognition() {
 
 #[pagetop::test]
 async fn poweredby_new_includes_current_year_and_app_name() {
-    setup();
+    setup().await;
 
     let mut p = PoweredBy::new();
     let html = p.render(&mut Context::default());
@@ -48,7 +48,7 @@ async fn poweredby_new_includes_current_year_and_app_name() {
 
 #[pagetop::test]
 async fn poweredby_with_copyright_overrides_text() {
-    setup();
+    setup().await;
 
     let custom = "2001 © FooBar Inc.";
     let mut p = PoweredBy::default().with_copyright(Some(custom));
@@ -60,7 +60,7 @@ async fn poweredby_with_copyright_overrides_text() {
 
 #[pagetop::test]
 async fn poweredby_with_copyright_none_hides_text() {
-    setup();
+    setup().await;
 
     let mut p = PoweredBy::new().with_copyright(None::<String>);
     let html = p.render(&mut Context::default());
@@ -72,7 +72,7 @@ async fn poweredby_with_copyright_none_hides_text() {
 
 #[pagetop::test]
 async fn poweredby_link_points_to_crates_io() {
-    setup();
+    setup().await;
 
     let mut p = PoweredBy::default();
     let html = p.render(&mut Context::default());
@@ -85,7 +85,7 @@ async fn poweredby_link_points_to_crates_io() {
 
 #[pagetop::test]
 async fn poweredby_getter_reflects_internal_state() {
-    setup();
+    setup().await;
 
     // Por defecto no hay copyright.
     let p0 = PoweredBy::default();

tests/locale.rs

@@ -1,8 +1,12 @@
 use pagetop::prelude::*;
 
+async fn setup() {
+    Application::new().await;
+}
+
 #[pagetop::test]
 async fn literal_text() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::n("© 2025 PageTop");
     assert_eq!(l10n.get(), Some("© 2025 PageTop".to_string()));
@@ -10,7 +14,7 @@ async fn literal_text() {
 
 #[pagetop::test]
 async fn translation_without_args() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::l("test_hello_world");
     let translation = l10n.lookup(&Locale::resolve("es-ES"));
@@ -19,7 +23,7 @@ async fn translation_without_args() {
 
 #[pagetop::test]
 async fn translation_with_args() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::l("test_hello_user").with_arg("userName", "Manuel");
     let translation = l10n.lookup(&Locale::resolve("es-ES"));
@@ -28,7 +32,7 @@ async fn translation_with_args() {
 
 #[pagetop::test]
 async fn translation_with_plural_and_select() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::l("test_shared_photos").with_args(vec![
         ("userName", "Roberto"),
@@ -41,7 +45,7 @@ async fn translation_with_plural_and_select() {
 
 #[pagetop::test]
 async fn check_fallback_language() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::l("test_hello_world");
     let translation = l10n.lookup(&Locale::resolve("xx-YY")); // Retrocede a "en-US".
@@ -50,7 +54,7 @@ async fn check_fallback_language() {
 
 #[pagetop::test]
 async fn check_unknown_key() {
-    let _app = web::test::init_router(Application::new().test());
+    setup().await;
 
     let l10n = L10n::l("non-existent-key");
     let translation = l10n.lookup(&Locale::resolve("en-US"));

tests/service.rs

@@ -2,7 +2,7 @@ use pagetop::prelude::*;
 
 #[pagetop::test]
 async fn homepage_returns_404() {
-    let app = web::test::init_router(Application::new().test());
+    let app = web::test::init_router(Application::new().await.test());
 
     let req = web::test::TestRequest::get().uri("/").to_request();
     let resp = web::test::send_request(&app, req).await;

tests/util.rs

@@ -3,6 +3,10 @@ use pagetop::prelude::*;
 use std::{borrow::Cow, fs, io};
 use tempfile::TempDir;
 
+async fn setup() {
+    Application::new().await;
+}
+
 // **< Testing normalize_ascii() >******************************************************************
 
 fn assert_err(input: &str, expected: util::NormalizeAsciiError) {
@@ -265,7 +269,7 @@ mod unix {
 
     #[pagetop::test]
     async fn ok_absolute_dir() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         // /tmp/<rand>/sub
         let td = TempDir::new()?;
@@ -279,7 +283,7 @@ mod unix {
 
     #[pagetop::test]
     async fn ok_relative_dir_with_manifest() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         let td = TempDir::new()?;
         let sub = td.path().join("sub");
@@ -293,7 +297,7 @@ mod unix {
 
     #[pagetop::test]
     async fn error_not_a_directory() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         let td = TempDir::new()?;
         let file = td.path().join("foo.txt");
@@ -311,7 +315,7 @@ mod windows {
 
     #[pagetop::test]
     async fn ok_absolute_dir() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         // C:\Users\...\Temp\...
         let td = TempDir::new()?;
@@ -325,7 +329,7 @@ mod windows {
 
     #[pagetop::test]
     async fn ok_relative_dir_with_manifest() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         let td = TempDir::new()?;
         let sub = td.path().join("sub");
@@ -339,7 +343,7 @@ mod windows {
 
     #[pagetop::test]
     async fn error_not_a_directory() -> io::Result<()> {
-        let _app = web::test::init_router(Application::new().test());
+        setup().await;
 
         let td = TempDir::new()?;
         let file = td.path().join("foo.txt");