refactor(v0): use generated render helpers

Switch v0 page and payload composition to generated render_html helpers, removing the local render_template bridge while keeping the explicit full-page SafeHtml shell boundary.

req: component/003

req: view/001

req: html_safety/002

examples/v0/src/main.rs

@@ -186,10 +186,11 @@ fn all_examples() -> String {
 
 fn shell(body: String) -> String {
     // Explicit full-page shell composition boundary for already-rendered hemplate fragments.
-    // req: html_safety/002 req: view/001
-    render_template(&AppShell {
+    // req: html_safety/002 req: view/001 req: component/003
+    ui::render_html(&AppShell {
         body: SafeHtml::trusted(body),
     })
+    .into_string()
 }
 
 fn todos_view(todos: &[Todo]) -> TodoItems {
@@ -206,24 +207,17 @@ fn todos_view(todos: &[Todo]) -> TodoItems {
 }
 
 fn render_page_swap(title: &'static str, message: &'static str) -> String {
-    // req: html_safety/002 req: view/001
-    ui::page_swap::lower_html(render_template(&PageSwap {
+    // req: html_safety/002 req: view/001 req: component/003
+    ui::page_swap::render_html(&PageSwap {
         content: render_docs_content(message),
         title,
-    }))
+    })
+    .into_string()
 }
 
 fn render_docs_content(message: &'static str) -> SafeHtml {
-    // req: html_safety/002 req: view/001
-    slhx::render_html(&DocsContent { message })
-}
-
-fn render_template(template: &impl Hemplate) -> String {
-    let mut html = String::new();
-    template
-        .render_into(&mut html)
-        .expect("v0 hemplate view renders");
-    html
+    // req: html_safety/002 req: view/001 req: component/003
+    ui::render_html(&DocsContent { message })
 }
 
 #[cfg(test)]
@@ -297,7 +291,7 @@ mod tests {
     fn todos_payload_is_rendered_by_a_hemplate_view() {
         let todos = vec![Todo { id: 7, title: "<b>Ship v0</b>".to_owned() }];
 
-        let html = slhx::render_html(&todos_view(&todos));
+        let html = ui::render_html(&todos_view(&todos));
         let document = Html::parse_fragment(html.as_str());
         let rows = document.select(&selector("li[data-key]")).collect::<Vec<_>>();
         assert_eq!(rows.len(), 1);
@@ -309,7 +303,7 @@ mod tests {
     // req: html_safety/002 req: view/001 req: test/005
     #[test]
     fn empty_todos_payload_is_rendered_by_a_hemplate_view() {
-        let html = slhx::render_html(&todos_view(&[]));
+        let html = ui::render_html(&todos_view(&[]));
         let document = Html::parse_fragment(html.as_str());
         let rows = document.select(&selector("li")).collect::<Vec<_>>();
         assert_eq!(rows.len(), 1);