play/pause

README.md

@@ -9,6 +9,9 @@ Everything it does fits on one screen:
 - **Volume** up/down for the Home 400 and the Living Room pair. A tap lands
   on the next multiple of `VOLUME_STEP` — from 23 it goes to 25, not 28 —
   so the levels stay round. Hold to keep moving.
+- **Play or pause** either room. A room that is grouped shares the AVR's
+  transport, so pausing it pauses the group — HEOS's doing, not the panel's:
+  a group has one thing playing, by definition
 - **Group** either room with the AVR — the AVR is always the host, so its
   sound takes over whatever joins it. A room that joins moves *into* the
   Home Cinema card, so one glance says what is playing together
@@ -257,6 +260,7 @@ Used by the interface:
 | `GET /api/targets` | every player and group HEOS can see |
 | `POST /api/volume` | `{"target": "home400", "steps": 1}` — taps, snapped to `VOLUME_STEP`. Also takes `delta` (raw points) or `level` (absolute) |
 | `POST /api/mute` | `{"target": "home400"}` |
+| `POST /api/playback` | `{"target": "home400", "state": "pause"}`, or no `state` to toggle |
 | `POST /api/group` | `{"target": "home400", "joined": true}` |
 | `POST /api/group/none` | every room back on its own |
 | `GET /api/avr/inputs` | your renamed sources |