🎨 Convierte el ciclo de renderizado en async

`prepare()` de `Component`, `render()` de `Region` y `Template`, y la
implementación de `ComponentRender` pasan a ser funciones async. Se
actualizan todos los componentes base, helpers, tests y ejemplos.

src/base/component/form/check.rs

@@ -121,6 +121,7 @@ pub struct Field {
     inline: bool,
 }
 
+#[async_trait]
 impl Component for Field {
     fn new() -> Self {
         Self::default()
@@ -145,7 +146,7 @@ impl Component for Field {
         self.alter_prop(PropsOp::prepend_classes("form-field form-field-checkboxes"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         // En `setup()` se garantiza que `name` e `id` están definidos antes del renderizado.
         let name = self.name().get().unwrap();
         let container_id = self.id().unwrap();

src/base/component/form/checkbox.rs

@@ -61,6 +61,7 @@ pub struct Checkbox {
     reverse: bool,
 }
 
+#[async_trait]
 impl Component for Checkbox {
     fn new() -> Self {
         Self::default()
@@ -95,7 +96,7 @@ impl Component for Checkbox {
         self.alter_prop(PropsOp::prepend_classes(classes));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         // En `setup()` se garantiza que `name` e `id` están definidos antes del renderizado.
         let name = self.name().get().unwrap();
         let container_id = self.id().unwrap();

src/base/component/form/component.rs

@@ -57,6 +57,7 @@ pub struct Form {
     children: Children,
 }
 
+#[async_trait]
 impl Component for Form {
     fn new() -> Self {
         Self::default()
@@ -70,7 +71,7 @@ impl Component for Form {
         self.alter_prop(PropsOp::prepend_classes("form"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         let method = match self.method() {
             form::Method::Post => Some("post"),
             form::Method::Get => None,
@@ -82,7 +83,7 @@ impl Component for Form {
                 method=[method]
                 accept-charset=[self.charset().get()]
             {
-                (self.children().render(cx))
+                (self.children().render(cx).await)
             }
         })
     }

src/base/component/form/fieldset.rs

@@ -36,6 +36,7 @@ pub struct Fieldset {
     children: Children,
 }
 
+#[async_trait]
 impl Component for Fieldset {
     fn new() -> Self {
         Self::default()
@@ -45,8 +46,8 @@ impl Component for Fieldset {
         self.props.get_id()
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
-        let children = self.children().render(cx);
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+        let children = self.children().render(cx).await;
 
         if children.is_empty() {
             return Ok(html! {});

src/base/component/form/hidden.rs

@@ -35,12 +35,13 @@ pub struct Hidden {
     value: AttrValue,
 }
 
+#[async_trait]
 impl Component for Hidden {
     fn new() -> Self {
         Self::default()
     }
 
-    fn prepare(&self, _cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, _cx: &mut Context) -> Result<Markup, ComponentError> {
         Ok(html! {
             input
                 type="hidden"

src/base/component/form/input.rs

@@ -157,6 +157,7 @@ pub struct Field {
     inputmode: Attr<Mode>,
 }
 
+#[async_trait]
 impl Component for Field {
     fn new() -> Self {
         Self::default()
@@ -181,7 +182,7 @@ impl Component for Field {
         )));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         let container_id = self.id();
         let input_id = container_id.as_deref().map(|id| util::join!(id, "-input"));
         let input_class = if *self.plaintext() {

src/base/component/form/radio.rs

@@ -112,6 +112,7 @@ pub struct Field {
     inline: bool,
 }
 
+#[async_trait]
 impl Component for Field {
     fn new() -> Self {
         Self::default()
@@ -136,7 +137,7 @@ impl Component for Field {
         self.alter_prop(PropsOp::prepend_classes("form-field form-field-radios"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         // En `setup()` se garantiza que `name` e `id` están definidos antes del renderizado.
         let name = self.name().get().unwrap();
         let container_id = self.id().unwrap();

src/base/component/form/range.rs

@@ -53,6 +53,7 @@ pub struct Range {
     disabled: bool,
 }
 
+#[async_trait]
 impl Component for Range {
     fn new() -> Self {
         Self::default()
@@ -74,7 +75,7 @@ impl Component for Range {
         self.alter_prop(PropsOp::prepend_classes("form-field form-field-range"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         let container_id = self.id();
         let range_id = container_id.as_deref().map(|id| util::join!(id, "-range"));
         Ok(html! {

src/base/component/form/select.rs

@@ -212,6 +212,7 @@ pub struct Field {
     disabled: bool,
 }
 
+#[async_trait]
 impl Component for Field {
     fn new() -> Self {
         Self::default()
@@ -233,7 +234,7 @@ impl Component for Field {
         self.alter_prop(PropsOp::prepend_classes("form-field form-field-select"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         let container_id = self.id();
         let select_id = container_id.as_deref().map(|id| util::join!(id, "-select"));
 

src/base/component/form/textarea.rs

@@ -63,6 +63,7 @@ pub struct Textarea {
     disabled: bool,
 }
 
+#[async_trait]
 impl Component for Textarea {
     fn new() -> Self {
         Self::default()
@@ -84,7 +85,7 @@ impl Component for Textarea {
         self.alter_prop(PropsOp::prepend_classes("form-field form-field-textarea"));
     }
 
-    fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
+    async fn prepare(&self, cx: &mut Context) -> Result<Markup, ComponentError> {
         let container_id = self.id();
         let textarea_id = container_id
             .as_deref()