fix(build): dispatch slot targets to matching component render/put

req: runtime/005

req: examples/001

req: htmx_equivalents/001

hemx-test/Cargo.toml

@@ -5,3 +5,6 @@ edition.workspace = true
 
 [dependencies]
 hemx-core = { path = "../hemx-core" }
+
+[dev-dependencies]
+hemx-build = { path = "../hemx-build" }

hemx-test/tests/examples_contract.rs

@@ -278,6 +278,51 @@ fn browser_e2e_does_not_shortcut_product_interactions() {
     );
 }
 
+#[test]
+fn html_examples_slot_targets_dispatch_to_component_put() {
+    // req: runtime/005 req: examples/001 req: htmx_equivalents/001
+    // Regression: slots named after a component (e.g. contact_card, editable_row)
+    // must lower injected partials using that component's handle table, not the
+    // containing page's handle table.
+    let root = Path::new(env!("CARGO_MANIFEST_DIR")).parent().unwrap();
+    let template_dir = root.join("examples/html_examples/templates");
+    let out_dir = std::env::temp_dir().join(format!(
+        "hemx-test-html-examples-slot-targets-{}",
+        std::process::id()
+    ));
+
+    let _ = std::fs::remove_dir_all(&out_dir);
+    std::fs::create_dir_all(&out_dir).unwrap();
+
+    let result = std::panic::catch_unwind(|| {
+        hemx_build::app()
+            .template_dir(&template_dir)
+            .out_dir(&out_dir)
+            .run()
+            .expect("hemx-build should generate html_examples artifacts");
+
+        let generated =
+            std::fs::read_to_string(out_dir.join("hemx.generated.rs")).unwrap_or_default();
+
+        for component in ["contact_card", "editable_row"] {
+            let component_path = format!("super::super::{component}");
+            let impl_header = format!("impl<T> SlotTarget<T, {component_path}::Component>");
+            let put_call = format!("{component_path}::put(self.slot, view)");
+            assert!(
+                generated.contains(&impl_header),
+                "gallery::targets should have a component-specific SlotTarget impl for `{component}`; missing `{impl_header}`"
+            );
+            assert!(
+                generated.contains(&put_call),
+                "gallery::targets::{component} put/replace should dispatch to `{component_path}::put`; missing `{put_call}`"
+            );
+        }
+    });
+
+    let _ = std::fs::remove_dir_all(&out_dir);
+    result.unwrap();
+}
+
 fn scan_examples(dir: &Path, visit: &mut impl FnMut(&Path, &str)) {
     for entry in std::fs::read_dir(dir).unwrap() {
         let entry = entry.unwrap();