Dashboard Studio 1.10.0: phone dashboards, room card, changelog

- Phone dashboards: a 4-column layout designed at phone width, with
  conversion both ways; on phones the top bar is hidden and comes back
  with a touch-and-hold on an empty spot
- Room card built from Home Assistant areas (area, device and entity
  registries): climate, lights on with an all-lights toggle, thermostat,
  open doors and windows, motion, media, and device buttons
- CHANGELOG.md for Home Assistant's Changelog tab, served at
  /api/changelog and shown under About > What's new

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

dashboard_studio/DOCS.md

@@ -69,6 +69,16 @@ When the light card points at a light group, it also lists every light in the gr
 
 The card grows with its size. On a small card it's a compact row with the status, battery and buttons. On a bigger card, the robot sits in the middle with a battery ring around it, a pulse while it cleans and a bolt while it charges. Below it are tiles for battery, cleaned area, cleaning time and any extra sensors you add (such as filter or brush life), the suction power levels, and labelled buttons to start or pause, send it back to the dock and locate it. Optionally add a map: pick the camera or image entity that your vacuum integration provides (for example Roborock or Valetudo), and it refreshes every few seconds. If the battery level is a separate sensor in your integration, pick it under **Battery sensor**.
 
+### Room
+
+Pick one of your Home Assistant rooms (areas) and the card gathers everything in it:
+
+- the room's temperature and humidity (the sensors set on the area in Home Assistant, or any temperature and humidity sensor in the room; you can also choose them yourself)
+- chips for what's going on: how many lights are on (tap to switch them all off, or all on), the thermostat, open doors and windows, motion, and music that's playing
+- buttons for the lamps, switches, fans, covers and locks in the room
+
+Light groups are left out so each lamp counts once. Add extra entities, or skip the room and list the entities yourself. The card glows warm while lights are on, and can have a background photo. Rooms are read from Home Assistant's area, device and entity registries.
+
 ### Media players
 
 One card can control several players. With more than one, a row of buttons at the top switches between them, and a small animated equalizer marks the ones that are playing. The card starts on whatever is playing. It shows the album art, title and artist, with previous, play/pause and next buttons and a volume slider. A player that is off gets a **Turn on** button instead. You can hide players that are off from the switcher.
@@ -109,6 +119,12 @@ Any widget can be shown only under certain conditions. Select it in edit mode, t
 
 In edit mode, hidden widgets stay visible but faded, with a **Hidden now** label, so you can still edit them. On the dashboard they disappear, and rows that only held hidden widgets close up so no gaps are left. Changes happen live as the entities change.
 
+## Phone dashboards
+
+Turn on **Designed for phones** under **Grid** in the dashboard settings. The dashboard switches to a 4-column layout that you design at phone width, so what you see while editing is what the phone shows. Existing widgets are converted: small tiles become half width, larger cards full width, and nothing overlaps. Turning it off converts back to 12 columns.
+
+On a phone, such a dashboard fills the whole screen, without the top bar with the dashboard picker and **Edit**. To bring the bar back, touch and hold an empty spot for a moment; it hides again after 10 seconds. On a computer, a phone dashboard shows as a phone-width column. Dashboards that aren't designed for phones keep reflowing into two columns on phones, with the top bar.
+
 ## Tabs and side menu
 
 A dashboard can have several tabs, each with its own widgets, for example *Overview*, *Household* and *Cameras*. To set them up, deselect all widgets in edit mode and use the **Tabs** section of the dashboard settings:
@@ -153,7 +169,7 @@ A device's choice comes before a person's. Without either, the last dashboard us
 
 ## Version and updates
 
-The version you're running is shown at the bottom of the dashboard settings, under **About** (deselect all widgets in edit mode). After Home Assistant installs an update, screens that are open reload themselves within a few minutes, which is handy for wall tablets. While you're editing, you get a message instead, so nothing you're working on is interrupted.
+The version you're running is shown at the bottom of the dashboard settings, under **About** (deselect all widgets in edit mode). **What's new** there shows the changelog, which is also on the app's **Changelog** tab in Home Assistant. After an update, a short message points you to it. After Home Assistant installs an update, screens that are open reload themselves within a few minutes, which is handy for wall tablets. While you're editing, you get a message instead, so nothing you're working on is interrupted.
 
 ## Data