Rename component parameters that are strict-mode reserved words

Found while testing crates/engine/src/component_codegen.rs:~226 (RESERVED list used by ident at :346)

Co-Authored-By: Claude Haiku 5.5 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

crates/engine/src/component_codegen.rs

@@ -225,7 +225,9 @@ pub fn type_name(name: &str) -> String {
 /// Words no generated parameter may be called (keywords of TypeScript, Swift and Kotlin, and
 /// names the generated code uses).
 const RESERVED: &[&str] = &[
+    "arguments",
     "as",
+    "await",
     "body",
     "break",
     "case",
@@ -239,6 +241,7 @@ const RESERVED: &[&str] = &[
     "do",
     "else",
     "enum",
+    "eval",
     "export",
     "extends",
     "extension",
@@ -249,6 +252,7 @@ const RESERVED: &[&str] = &[
     "function",
     "guard",
     "if",
+    "implements",
     "import",
     "in",
     "init",
@@ -264,6 +268,7 @@ const RESERVED: &[&str] = &[
     "operator",
     "package",
     "private",
+    "protected",
     "protocol",
     "public",
     "ref",

crates/engine/src/component_codegen_tests.rs

@@ -43,6 +43,18 @@ fn button_set(s: &mut Session) -> (NodeId, NodeId, NodeId) {
     (set, variants[0], variants[1])
 }
 
+#[test]
+fn strict_mode_reserved_words_are_not_parameter_names() {
+    let mut s = Session::new();
+    let (c, title, _) = card(&mut s);
+    ex(&mut s, "component.addProperty", json!({"id": c, "name": "Protected", "type": "text", "layer": title}));
+    let react = code(&mut s, c, "react");
+    assert!(react.contains("protectedValue"), "React renames the property:\n{react}");
+    for bad in ["  protected?", "  protected =", "{protected}"] {
+        assert!(!react.contains(bad), "reserved word used as a binding ({bad:?}):\n{react}");
+    }
+}
+
 #[test]
 fn components_take_their_properties_as_parameters() {
     let mut s = Session::new();