diff --git a/frontend/tests/render-party-board.mjs b/frontend/tests/render-party-board.mjs
index 6158027..4b0309f 100644
--- a/frontend/tests/render-party-board.mjs
+++ b/frontend/tests/render-party-board.mjs
@@ -3,10 +3,13 @@
  *
  * Usage: node render-party-board.mjs < spec.json
  *
- * The spec JSON carries {bundle, tag, config, hass}; stdout receives one JSON
- * object {plates, html} where plates is the ordered plate list the shadow DOM
- * renders (name + present/away/unknown kind). The Python panel tests drive
- * this harness so the assertions run against the exact bundle HACS ships.
+ * The spec JSON carries {bundle, tag, config, hass, url?, click_plate?};
+ * stdout receives one JSON object {plates, tappable, location, html} where
+ * plates is the ordered plate list the shadow DOM renders (name +
+ * present/away/unknown kind), tappable the plate names rendered as tappable
+ * <button> plates, and location the window pathname after the optional plate
+ * tap. 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";
@@ -15,7 +18,7 @@ import { JSDOM } from "jsdom";
 const spec = JSON.parse(readFileSync(0, "utf8"));
 
 const dom = new JSDOM("<!doctype html><html><body></body></html>", {
-  url: "http://homeassistant.local/nestquest/board",
+  url: spec.url ?? "http://homeassistant.local/nestquest/board",
   pretendToBeVisual: true,
 });
 
@@ -31,6 +34,10 @@ for (const key of Object.getOwnPropertyNames(dom.window)) {
   }
 }
 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 dispatched event to be delivered.
+globalThis.Event = dom.window.Event;
 
 await import(pathToFileURL(spec.bundle).href);
 
@@ -40,9 +47,10 @@ element.hass = spec.hass;
 document.body.appendChild(element);
 await element.updateComplete;
 
-const plates = [
+const plateNodes = [
   ...element.shadowRoot.querySelectorAll(".plates .plate"),
-].map((plate) => ({
+];
+const plates = plateNodes.map((plate) => ({
   name: plate.querySelector(".name")?.textContent?.trim() ?? "",
   kind: plate.classList.contains("unknown")
     ? "unknown"
@@ -50,7 +58,23 @@ const plates = [
       ? "away"
       : "present",
 }));
+const tappable = plateNodes
+  .filter((plate) => plate.tagName === "BUTTON")
+  .map((plate) => plate.querySelector(".name")?.textContent?.trim() ?? "");
 
-const payload = JSON.stringify({ plates, html: element.shadowRoot.innerHTML });
+if (spec.click_plate !== undefined) {
+  const plate = plateNodes.find(
+    (candidate) =>
+      candidate.querySelector(".name")?.textContent?.trim() === spec.click_plate
+  );
+  plate?.click();
+}
+
+const payload = JSON.stringify({
+  plates,
+  tappable,
+  location: window.location.pathname,
+  html: element.shadowRoot.innerHTML,
+});
 await new Promise((resolve) => process.stdout.write(payload, () => resolve()));
 process.exit(0);
diff --git a/frontend/tests/render-quest-log.mjs b/frontend/tests/render-quest-log.mjs
new file mode 100644
index 0000000..bd039c6
--- /dev/null
+++ b/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);
\ No newline at end of file
diff --git a/tests/test_panel_cards.py b/tests/test_panel_cards.py
index 3bc47bd..95f2ba0 100644
--- a/tests/test_panel_cards.py
+++ b/tests/test_panel_cards.py
@@ -6,10 +6,12 @@ spirit as test_frontend.py. They cover the states decided in
 design/PANEL-EMPTY-STATES.md and PANEL-SPEC.md, and guard the kid-facing
 bundles against ever gaining a parent-only service call.
 
-The party board additionally has render tests: they drive
-frontend/tests/render-party-board.mjs, which imports the built bundle into a
-jsdom window and reports the ordered plates the shadow DOM renders, so the
-zero-config discovery contract is asserted against the bundle HACS ships.
+The cards additionally have render tests: they drive the jsdom harnesses in
+frontend/tests — render-party-board.mjs imports the built bundle into a
+jsdom window and reports the ordered plates the shadow DOM renders plus
+where a crest tap navigates, and render-quest-log.mjs reports where the
+quest log's idle return navigates — so the zero-config discovery and
+navigation contracts are asserted against the bundle HACS ships.
 """
 from __future__ import annotations
 
@@ -24,6 +26,7 @@ PARTY_BOARD = FRONTEND_CARDS_DIR / "party-board.ts"
 QUEST_LOG = FRONTEND_CARDS_DIR / "quest-log.ts"
 BUNDLE_PATH = REPO_ROOT / "custom_components" / "nestquest" / "www" / "nestquest-cards.js"
 RENDER_HARNESS = FRONTEND_DIR / "tests" / "render-party-board.mjs"
+QUEST_LOG_HARNESS = FRONTEND_DIR / "tests" / "render-quest-log.mjs"
 STRATEGY_HARNESS = FRONTEND_DIR / "tests" / "render-strategy.mjs"
 STRATEGY_SOURCE = FRONTEND_DIR / "src" / "strategy.ts"
 
@@ -234,13 +237,20 @@ def _three_child_states() -> dict:
     }
 
 
-def _render_party_board(config: dict, states: dict) -> dict:
+def _render_party_board(
+    config: dict,
+    states: dict,
+    url: str | None = None,
+    click_plate: str | None = None,
+) -> dict:
     """Render the built bundle's party board and return its plates.
 
     Drives frontend/tests/render-party-board.mjs: the harness imports
     the committed bundle (the artifact HACS ships) into a jsdom window,
-    mounts the card with the given config and hass snapshot, and prints
-    the ordered plates its shadow DOM renders.
+    mounts the card with the given config and hass snapshot, optionally
+    taps the named plate, and prints the ordered plates its shadow DOM
+    renders, which of them are tappable buttons, and the pathname after
+    the optional tap.
     """
     assert BUNDLE_PATH.is_file(), "bundle missing: run cd frontend && npm run build"
     assert RENDER_HARNESS.is_file()
@@ -250,6 +260,10 @@ def _render_party_board(config: dict, states: dict) -> dict:
         "config": config,
         "hass": {"config": {"time_zone": "UTC"}, "states": states},
     }
+    if url is not None:
+        spec["url"] = url
+    if click_plate is not None:
+        spec["click_plate"] = click_plate
     completed = subprocess.run(
         ["node", str(RENDER_HARNESS)],
         input=json.dumps(spec),
@@ -446,3 +460,99 @@ def test_strategy_config_overrides_still_apply() -> None:
     assert result["views"][0]["cards"][0]["quest_log_path"] == root
     for view in result["views"][1:]:
         assert view["cards"][0]["board_path"] == root
+
+
+# --- Navigation tests (strategy-computed paths under jsdom) -------------------
+
+
+def _render_quest_log(
+    config: dict,
+    states: dict,
+    url: str,
+    idle_ms: int | None = None,
+) -> dict:
+    """Render the built bundle's quest log and report its location.
+
+    Drives frontend/tests/render-quest-log.mjs: the harness imports the
+    committed bundle (the artifact HACS ships) into a jsdom window at
+    ``url`` — the card resolves its child from the pathname's last
+    segment — waits the optional idle window, and prints the pathname
+    and the rendered title.
+    """
+    assert BUNDLE_PATH.is_file(), "bundle missing: run cd frontend && npm run build"
+    assert QUEST_LOG_HARNESS.is_file()
+    spec = {
+        "bundle": str(BUNDLE_PATH),
+        "url": url,
+        "config": config,
+        "hass": {"config": {"time_zone": "UTC"}, "states": states},
+    }
+    if idle_ms is not None:
+        spec["idle_ms"] = idle_ms
+    completed = subprocess.run(
+        ["node", str(QUEST_LOG_HARNESS)],
+        input=json.dumps(spec),
+        capture_output=True,
+        text=True,
+        timeout=120,
+    )
+    assert completed.returncode == 0, (
+        f"quest-log harness failed: {completed.stderr}"
+    )
+    return json.loads(completed.stdout)
+
+
+def test_present_crest_tap_navigates_to_the_child_quest_log() -> None:
+    """Tapping a present crest pushes <dashboard root>/<slug>: the exact
+    URL the strategy computed for that child's quest log view (the log
+    then resolves its child from the path's last segment)."""
+    generated = _generate_dashboard(
+        {}, _three_child_states(), url="http://homeassistant.local/nestquest"
+    )
+    board_config = generated["views"][0]["cards"][0]
+    result = _render_party_board(
+        board_config,
+        _three_child_states(),
+        url="http://homeassistant.local/nestquest",
+        click_plate="Ada",
+    )
+    # Only the present adventurers' plates are tappable buttons.
+    assert result["tappable"] == ["Ada", "Cory"]
+    assert result["location"] == "/nestquest/ada"
+
+
+def test_away_plate_does_not_navigate() -> None:
+    """Bo is away today: his plate is not a button, and tapping it leaves
+    the URL at the dashboard root — away adventurers cannot open a log."""
+    generated = _generate_dashboard(
+        {}, _three_child_states(), url="http://homeassistant.local/nestquest"
+    )
+    board_config = generated["views"][0]["cards"][0]
+    result = _render_party_board(
+        board_config,
+        _three_child_states(),
+        url="http://homeassistant.local/nestquest",
+        click_plate="Bo",
+    )
+    assert "Bo" not in result["tappable"]
+    assert result["location"] == "/nestquest"
+
+
+def test_quest_log_idle_return_navigates_to_the_board() -> None:
+    """After the idle window the quest log returns to the board using the
+    strategy-computed board_path (the dashboard root) — and it resolved
+    Ada from the URL's last segment first.  ``idle_return_seconds`` is
+    set by hand because the card's 40-second default is too slow for a
+    test; the strategy never generates that knob."""
+    generated = _generate_dashboard(
+        {}, _three_child_states(), url="http://homeassistant.local/nestquest"
+    )
+    log_config = {**generated["views"][1]["cards"][0], "idle_return_seconds": 1}
+    result = _render_quest_log(
+        log_config,
+        _three_child_states(),
+        url="http://homeassistant.local/nestquest/ada",
+        idle_ms=2000,
+    )
+    assert result["headline"] == "Ada's Quest Log"
+    assert result["location"] == "/nestquest"