fix(csr): prevent native output recursion

packages/csr/src/reactive-runtime.ts

@@ -2512,6 +2512,11 @@ export const REACTIVE_RUNTIME = String.raw`
 
         var stmt = attr.value;
         var listener = function (event) {
+          // An unbound output falls back to a same-named CustomEvent for
+          // external consumers. Do not feed that synthetic event back into
+          // the component's own declarative DOM handler (for example,
+          // @click="output.click()"), which would recurse indefinitely.
+          if (event && event.__wrnexusComponentOutput) return;
           var locals =
             decodeLoopLocals(node);
 
@@ -4167,6 +4172,7 @@ export const REACTIVE_RUNTIME = String.raw`
       bubbles: true,
       detail: detail || {},
     });
+    event.__wrnexusComponentOutput = true;
     root.dispatchEvent(event);
     // Compatibility for applications using the former prefixed contract.
     root.dispatchEvent(new EventConstructor("wrnexus:" + String(name), {

packages/csr/test/reactive.test.ts

@@ -781,6 +781,26 @@ test("development runtime allows an output with no parent binding", () => {
   expect(warnings).toHaveLength(0);
 });
 
+test("an unbound native-named output does not re-enter its DOM handler", () => {
+  const win = mount(
+    `<div data-scope="" data-wrn-events="click">` +
+      `<button data-on-click="output.click()">go</button>` +
+      `</div>`,
+  );
+  const root = win.document.querySelector("[data-wrn-events]") as unknown as HTMLElement;
+  let outputs = 0;
+  root.addEventListener("click", (event) => {
+    if ((event as Event & { __wrnexusComponentOutput?: boolean }).__wrnexusComponentOutput) {
+      outputs += 1;
+    }
+  });
+
+  expect(() =>
+    (win.document.querySelector("button") as unknown as HTMLElement).click(),
+  ).not.toThrow();
+  expect(outputs).toBe(1);
+});
+
 test("development runtime warns when a component binding names a missing function", () => {
   const win = new Window() as unknown as Window & Record<string, unknown>;
   win.document.body.innerHTML =