Add Klima dashboard as YAML-mode with desktop layout and new devices

- Register dashboards/klima.yaml in configuration.yaml under lovelace.dashboards
- Remove outer vertical-stack so masonry layout creates multiple columns on desktop
- Replace weather entities card with built-in weather-forecast card (daily)
- Add bedroom AC (climate.klimaanlage) to bedroom section
- Add office AC (climate.echos_mobile_klimaanlage_mit_wifi) row to office section
- Add office fan (fan.luftzirkulator) to office section

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

configuration.yaml

@@ -6,6 +6,16 @@ default_config:
 frontend:
   themes: !include_dir_merge_named themes
 
+lovelace:
+  dashboards:
+    lovelace-klima:
+      mode: yaml
+      filename: dashboards/klima.yaml
+      title: Klima
+      icon: mdi:thermometer
+      show_in_sidebar: true
+      require_admin: false
+
 automation: !include automations.yaml
 script: !include scripts.yaml
 scene: !include scenes.yaml