Prepare v2.0.0 release

docs/websocket.md

@@ -2,7 +2,7 @@
 
 ## Overview
 
-Player service websocket base URL: `ws://localhost:3001`
+Player service websocket base URL: `ws://localhost:8081`
 
 This document uses OpenAPI-style sections, but stays in plain markdown.
 
@@ -28,29 +28,7 @@ Access: internal-only. The web backend subscribes with signed request headers; b
 
 ### Messages from player to server
 
-The player sends two message types:
-
-- `hello`
-- `state`
-
-#### `hello`
-
-Example payload:
-
-```json
-{
-  "type": "hello",
-  "clientId": "client-id",
-  "clientName": "friendly label",
-  "deviceId": "device-id",
-  "userAgent": "browser ua",
-  "page": "http://.../screen/demo",
-  "viewport": { "width": 1920, "height": 1080 },
-  "paused": false,
-  "blackout": false,
-  "currentSlide": null
-}
-```
+The player sends a state snapshot message.
 
 #### `state`
 
@@ -67,16 +45,13 @@ Example payload:
   "viewport": { "width": 1920, "height": 1080 },
   "paused": false,
   "blackout": false,
-  "currentSlide": {
-    "id": 12,
-    "title": "Main Slide",
-    "kind": "image",
-    "playlistSignature": "..."
-  }
+  "currentSlide": null
 }
 ```
 
-The server recognizes `clientId`, `clientName`, `deviceId`, `userAgent`, `page`, `viewport`, `paused`, `blackout`, and `currentSlide` from player messages. When `currentSlide` is present, the player includes the active slide id, title, kind, and playlist signature.
+When `currentSlide` is present, the player includes the active slide id, title, kind, and playlist signature.
+
+The server recognizes `clientId`, `clientName`, `deviceId`, `userAgent`, `page`, `viewport`, `paused`, `blackout`, and `currentSlide` from state messages.
 
 ### Messages from server to player
 
@@ -92,15 +67,13 @@ The server sends command messages with:
 
 Supported commands:
 
+- `blackout`
+- `next`
+- `pause`
+- `previous`
 - `refresh`
 - `reload`
 - `redirect`
-- `pause`
-- `blackout`
-- `previous`
-- `next`
-- `left`
-- `right`
 - `setclientname`
 
 #### `refresh`
@@ -130,10 +103,10 @@ Use `false` to restore and `true` to blackout.
 #### `redirect`
 Requests the player page to navigate to a new location. The destination is supplied as `url` by the caller that forwarded the command.
 
-#### `previous` / `left`
+#### `previous`
 Moves to the previous slide.
 
-#### `next` / `right`
+#### `next`
 Moves to the next slide.
 
 #### `setclientname`