Dashboard Studio 1.7.0: scroll and swipe cards, more themes, per-device dashboards

- Container cards: horizontal scroll (snap, arrows, keeps position) and
  swipe (dots, optional autoplay that survives redraws and respects
  reduced motion), with add/edit/reorder of the cards inside
- Nine new themes, contrast-checked, including High contrast; bright
  accents get dark text
- Choose which dashboard opens per device (optionally in kiosk mode)
  and per Home Assistant user, via /api/whoami and the ingress user
  headers

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

dashboard_studio/server/mock_ha.py

@@ -74,7 +74,8 @@ class MockHA:
                 entity("script.good_morning", "off", friendly_name="Good Morning"),
                 entity("weather.home", "partlycloudy", friendly_name="Home", temperature=13, humidity=71, wind_speed=14),
                 entity("camera.front_yard", "idle", friendly_name="Front Yard"),
-                entity("person.alex", "home", friendly_name="Alex"),
+                entity("person.alex", "home", friendly_name="Alex", user_id="mock-user-alex"),
+                entity("person.sam", "not_home", friendly_name="Sam", user_id="mock-user-sam"),
                 entity("input_boolean.guest_mode", "off", friendly_name="Guest Mode"),
                 entity("calendar.family", "off", friendly_name="Family"),
                 entity("calendar.work", "on", friendly_name="Work"),