panel: add a return control to the Quest Log header

A child who opened their Quest Log could only get back to the Party
board by waiting out the 40 s idle return. The header now carries a
72px "The Party" button (left chevron, left of the crest) that calls
the existing _returnToBoard() path the idle return uses. The idle
return, crest-tap navigation and 1c auto-return are unchanged.

Documented in PANEL-SPEC §3; jsdom test taps it and asserts navigation
to the strategy-computed board_path; bundle rebuilt.

Task: 987d2d0f-a5d1-4bb5-a1f3-80fd6adbf5e9

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

frontend/src/cards/quest-log.ts

@@ -374,6 +374,37 @@ const logStyles = css`
     gap: 28px;
   }
 
+  button.return {
+    flex: none;
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    gap: 10px;
+    height: var(--nq-p-button-height);
+    padding: 0 28px 0 20px;
+    border: 2px solid rgba(92, 62, 26, 0.5);
+    border-radius: 10px;
+    background: rgba(92, 62, 26, 0.1);
+    color: var(--nq-p-ink);
+    font-family: var(--nq-p-font-heading);
+    font-size: 26px;
+    font-weight: 700;
+    line-height: 1;
+    white-space: nowrap;
+    cursor: pointer;
+    -webkit-tap-highlight-color: transparent;
+    transition: transform var(--nq-dur-micro) var(--nq-ease-out);
+  }
+
+  button.return:active {
+    transform: scale(0.98);
+  }
+
+  button.return svg {
+    width: 34px;
+    height: 34px;
+  }
+
   .crest {
     position: relative;
     flex: none;
@@ -1199,6 +1230,18 @@ const ICON_X = html`<svg
   <path d="m6 6 12 12"></path>
 </svg>`;
 
+const ICON_CHEVRON_LEFT = html`<svg
+  viewBox="0 0 24 24"
+  fill="none"
+  stroke="currentColor"
+  stroke-width="2"
+  stroke-linecap="round"
+  stroke-linejoin="round"
+  aria-hidden="true"
+>
+  <path d="m15 18-6-6 6-6"></path>
+</svg>`;
+
 const ICON_STAR = html`<svg
   viewBox="0 0 24 24"
   fill="none"
@@ -1944,6 +1987,18 @@ export class NestQuestQuestLogCard extends LitElement {
     const initial = (name?.charAt(0) || "?").toUpperCase();
     return html`
       <header class="header">
+        ${this._boardPath()
+          ? html`
+              <button
+                class="return"
+                type="button"
+                @click=${() => this._returnToBoard()}
+              >
+                ${ICON_CHEVRON_LEFT}
+                <span>The Party</span>
+              </button>
+            `
+          : nothing}
         <span class="crest${away ? " away" : ""}" aria-hidden="true">
           <span class="crest-face">
             <span class="initial">${initial}</span>

frontend/tests/render-quest-log.mjs

@@ -14,6 +14,8 @@
  * tap_complete: <instance id> the harness taps that card's Complete button,
  * records whether the confirm dialog opened, taps the dialog's Complete, and
  * reports every hass.callService call as tap: {dialog_opened, service_calls}.
+ * With tap_return: true the harness taps the header's return control and
+ * reports it as returned: {rendered, label} before the final snapshot.
  * The Python panel tests drive this harness so the
  * assertions run against the exact bundle HACS ships.
  */
@@ -75,6 +77,17 @@ if (spec.tap_complete !== undefined) {
   tap = { dialog_opened: confirm !== null, service_calls: serviceCalls };
 }
 
+let returned = null;
+if (spec.tap_return) {
+  const control = element.shadowRoot.querySelector(".header button.return");
+  returned = {
+    rendered: control !== null,
+    label: control?.textContent?.trim() ?? "",
+  };
+  control?.click();
+  await element.updateComplete;
+}
+
 const snapshot = () => ({
   location: window.location.pathname,
   headline: element.shadowRoot.querySelector(".title")?.textContent?.trim() ?? "",
@@ -110,6 +123,6 @@ if (spec.idle_ms !== undefined) {
   await new Promise((resolve) => setTimeout(resolve, spec.idle_ms));
 }
 
-const payload = JSON.stringify({ ...snapshot(), probe, tap });
+const payload = JSON.stringify({ ...snapshot(), probe, tap, returned });
 await new Promise((resolve) => process.stdout.write(payload, () => resolve()));
 process.exit(0);