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/config.yaml

@@ -1,5 +1,5 @@
 name: Dashboard Studio
-version: "1.6.1"
+version: "1.7.0"
 slug: dashboard_studio
 description: Drag-and-drop dashboard builder with a free-form grid, live entity widgets and themes.
 url: https://git.melvanveen.nl/veenm/ha-dashboard-studio