From 3e7011e2c8bfc023bc4e3d7dd72dc0107d08a846 Mon Sep 17 00:00:00 2001
From: Paul Bottein <paul.bottein@gmail.com>
Date: Fri, 30 Jan 2026 11:48:47 +0100
Subject: [PATCH] Fix demo because of new default panel (#29279)

---
 demo/src/ha-demo.ts           |  6 ++++++
 demo/src/stubs/frontend.ts    | 21 +++++++++++++++++++++
 demo/src/stubs/template.ts    | 12 +++++++++++-
 src/fake_data/demo_panels.ts  |  8 ++++++++
 src/fake_data/provide_hass.ts |  6 ++++--
 5 files changed, 50 insertions(+), 3 deletions(-)

diff --git a/demo/src/ha-demo.ts b/demo/src/ha-demo.ts
index 3406e0270d..1d2a735279 100644
--- a/demo/src/ha-demo.ts
+++ b/demo/src/ha-demo.ts
@@ -9,11 +9,14 @@ import { selectedDemoConfig } from "./configs/demo-configs";
 import { mockAreaRegistry } from "./stubs/area_registry";
 import { mockAuth } from "./stubs/auth";
 import { mockConfigEntries } from "./stubs/config_entries";
+import { mockDeviceRegistry } from "./stubs/device_registry";
 import { mockEnergy } from "./stubs/energy";
 import { energyEntities } from "./stubs/entities";
 import { mockEntityRegistry } from "./stubs/entity_registry";
 import { mockEvents } from "./stubs/events";
+import { mockFloorRegistry } from "./stubs/floor_registry";
 import { mockFrontend } from "./stubs/frontend";
+import { mockLabelRegistry } from "./stubs/label_registry";
 import { mockIcons } from "./stubs/icons";
 import { mockHistory } from "./stubs/history";
 import { mockLovelace } from "./stubs/lovelace";
@@ -60,6 +63,9 @@ export class HaDemo extends HomeAssistantAppEl {
     mockPersistentNotification(hass);
     mockConfigEntries(hass);
     mockAreaRegistry(hass);
+    mockDeviceRegistry(hass);
+    mockFloorRegistry(hass);
+    mockLabelRegistry(hass);
     mockEntityRegistry(hass, [
       {
         config_entry_id: "co2signal",
diff --git a/demo/src/stubs/frontend.ts b/demo/src/stubs/frontend.ts
index 70a4d5a0d2..c4717bbbbe 100644
--- a/demo/src/stubs/frontend.ts
+++ b/demo/src/stubs/frontend.ts
@@ -27,4 +27,25 @@ export const mockFrontend = (hass: MockHomeAssistant) => {
     // eslint-disable-next-line @typescript-eslint/no-empty-function
     return () => {};
   });
+  hass.mockWS(
+    "frontend/subscribe_system_data",
+    (_msg, currentHass, onChange) => {
+      onChange?.({
+        value: currentHass.systemData,
+      });
+      // eslint-disable-next-line @typescript-eslint/no-empty-function
+      return () => {};
+    }
+  );
+  hass.mockWS("labs/subscribe", (_msg, _currentHass, onChange) => {
+    onChange?.({
+      preview_feature: _msg.preview_feature,
+      domain: _msg.domain,
+      enabled: false,
+      is_built_in: true,
+    });
+    // eslint-disable-next-line @typescript-eslint/no-empty-function
+    return () => {};
+  });
+  hass.mockWS("repairs/list_issues", () => ({ issues: [] }));
 };
diff --git a/demo/src/stubs/template.ts b/demo/src/stubs/template.ts
index ca77017c1a..82608cae4e 100644
--- a/demo/src/stubs/template.ts
+++ b/demo/src/stubs/template.ts
@@ -7,8 +7,18 @@ export const mockTemplate = (hass: MockHomeAssistant) => {
     })
   );
   hass.mockWS("render_template", (msg, _hass, onChange) => {
+    let result = msg.template;
+    // Simple variable substitution for demo purposes
+    if (msg.variables) {
+      for (const [key, value] of Object.entries(msg.variables)) {
+        result = result.replace(
+          new RegExp(`\\{\\{\\s*${key}\\s*\\}\\}`, "g"),
+          String(value)
+        );
+      }
+    }
     onChange!({
-      result: msg.template,
+      result,
       listeners: { all: false, domains: [], entities: [], time: false },
     });
     // eslint-disable-next-line @typescript-eslint/no-empty-function
diff --git a/src/fake_data/demo_panels.ts b/src/fake_data/demo_panels.ts
index cf99cb94f1..a48754f4d0 100644
--- a/src/fake_data/demo_panels.ts
+++ b/src/fake_data/demo_panels.ts
@@ -8,6 +8,14 @@ export const demoPanels: Panels = {
     config: { mode: "storage" },
     url_path: "lovelace",
   },
+  home: {
+    component_name: "home",
+    icon: "mdi:home",
+    title: "home",
+    default_visible: false,
+    config: null,
+    url_path: "home",
+  },
   "dev-state": {
     component_name: "dev-state",
     icon: null,
diff --git a/src/fake_data/provide_hass.ts b/src/fake_data/provide_hass.ts
index 5f7c5f1628..53c117b6c2 100644
--- a/src/fake_data/provide_hass.ts
+++ b/src/fake_data/provide_hass.ts
@@ -7,7 +7,6 @@ import { fireEvent } from "../common/dom/fire_event";
 import { computeFormatFunctions } from "../common/translations/entity-state";
 import { computeLocalize } from "../common/translations/localize";
 import type { EntityRegistryDisplayEntry } from "../data/entity/entity_registry";
-import { DEFAULT_PANEL } from "../data/panel";
 import {
   DateFormat,
   FirstWeekday,
@@ -268,7 +267,9 @@ export const provideHass = (
       name: "Demo User",
     },
     panelUrl: "lovelace",
-    defaultPanel: DEFAULT_PANEL,
+    systemData: {
+      default_panel: "lovelace",
+    },
     language: localLanguage,
     selectedLanguage: localLanguage,
     locale: {
@@ -367,6 +368,7 @@ export const provideHass = (
     areas: {},
     devices: {},
     entities: {},
+    floors: {},
     formatEntityState: (stateObj, state) =>
       (state !== null ? state : stateObj.state) ?? "",
     formatEntityAttributeName: (_stateObj, attribute) => attribute,