fix(examples): keep test updates lower-aware

Move canonical example test helpers and docs off direct slot render shortcuts so even test-only slot updates use generated lower-aware HTML paths.

req: component/003

req: runtime/001

req: examples/003

examples/kanban/src/lib.rs

@@ -27,7 +27,7 @@ mod tests {
     #[test]
     fn kanban_board_updates_generated_slot() {
         fn render_board() -> impl IntoEffect {
-            board::slots::board.html(slhx::render(&empty_board()))
+            board::slots::board.html(super::ui::render(&empty_board()))
         }
 
         let effect = inspect(render_board());

examples/techdemo/src/lib.rs

@@ -30,7 +30,7 @@ mod tests {
     fn techdemo_uses_generated_slots_for_multi_target_updates() {
         fn update() -> impl IntoEffect {
             (
-                slots::hero_metrics.html(slhx::render(&FastMetric { label: "fast" })),
+                slots::hero_metrics.html(super::ui::render(&FastMetric { label: "fast" })),
                 slots::notice.text("typed"),
             )
         }

examples/v0/src/lib.rs

@@ -121,7 +121,7 @@ mod tests {
     fn page_swap_updates_content_and_history() {
         fn load_docs() -> impl IntoEffect {
             (
-                page_swap::slots::content.html(slhx::render(&DocsContent {
+                page_swap::slots::content.html(page_swap::render(&DocsContent {
                     message: "This page was swapped.",
                 })),
                 page_swap::slots::title.text("Docs"),