Assert the crest-tap navigation the strategy wires

The strategy already computes quest_log_path and board_path and the cards
already navigate by them, so no card source needed fixing — what was
missing was proof: nothing asserted where a crest tap or the quest log's
idle return actually lands. The render harnesses now report the navigation
target of a present-plate tap, that an away plate is not tappable and does
not navigate, and that the idle return goes back to the strategy-computed
board path, so the navigation contract is asserted against the bundle HACS
ships instead of read out of the sources.

frontend/tests/render-quest-log.mjs

@@ -0,0 +1,59 @@
+/**
+ * Render the built quest-log card under jsdom and report its location.
+ *
+ * Usage: node render-quest-log.mjs < spec.json
+ *
+ * The spec JSON carries {bundle, url, config, hass, idle_ms?}; the card is
+ * mounted at the given URL (it resolves its child from the pathname's last
+ * segment), and after the optional idle wait stdout receives one JSON object
+ * {location, headline, html} — the window pathname and the rendered title.
+ * The Python panel tests drive this harness so the assertions run against
+ * the exact bundle HACS ships.
+ */
+import { readFileSync } from "node:fs";
+import { pathToFileURL } from "node:url";
+import { JSDOM } from "jsdom";
+
+const spec = JSON.parse(readFileSync(0, "utf8"));
+
+const dom = new JSDOM("<!doctype html><html><body></body></html>", {
+  url: spec.url ?? "http://homeassistant.local/nestquest/ada",
+  pretendToBeVisual: true,
+});
+
+// Expose the jsdom globals the Lit bundle expects. Node's own intrinsics
+// (Object, Array, ...) are kept — only what globalThis lacks is copied.
+for (const key of Object.getOwnPropertyNames(dom.window)) {
+  if (!(key in globalThis)) {
+    try {
+      globalThis[key] = dom.window[key];
+    } catch {
+      // jsdom getters may throw on access; the card does not need them.
+    }
+  }
+}
+globalThis.window = dom.window;
+// The card navigates by dispatching new Event("location-changed") on this
+// window; jsdom's EventTarget rejects Node's own global Event class, so the
+// jsdom Event must shadow it for the return navigation to be delivered.
+globalThis.Event = dom.window.Event;
+
+await import(pathToFileURL(spec.bundle).href);
+
+const element = document.createElement("nestquest-quest-log-card");
+element.setConfig(spec.config);
+element.hass = spec.hass;
+document.body.appendChild(element);
+await element.updateComplete;
+
+if (spec.idle_ms !== undefined) {
+  await new Promise((resolve) => setTimeout(resolve, spec.idle_ms));
+}
+
+const payload = JSON.stringify({
+  location: window.location.pathname,
+  headline: element.shadowRoot.querySelector(".title")?.textContent?.trim() ?? "",
+  html: element.shadowRoot.innerHTML,
+});
+await new Promise((resolve) => process.stdout.write(payload, () => resolve()));
+process.exit(0);