Docs: add discord presence config notes (#10855)

docs/channels/discord.md

@@ -386,6 +386,59 @@ See [Slash commands](/tools/slash-commands) for command catalog and behavior.
 
   </Accordion>
 
+  <Accordion title="Presence configuration">
+    Presence updates are applied only when you set a status or activity field.
+
+    Status only example:
+
+```json5
+{
+  channels: {
+    discord: {
+      status: "idle",
+    },
+  },
+}
+```
+
+    Activity example (custom status is the default activity type):
+
+```json5
+{
+  channels: {
+    discord: {
+      activity: "Focus time",
+      activityType: 4,
+    },
+  },
+}
+```
+
+    Streaming example:
+
+```json5
+{
+  channels: {
+    discord: {
+      activity: "Live coding",
+      activityType: 1,
+      activityUrl: "https://twitch.tv/openclaw",
+    },
+  },
+}
+```
+
+    Activity type map:
+
+    - 0: Playing
+    - 1: Streaming (requires `activityUrl`)
+    - 2: Listening
+    - 3: Watching
+    - 4: Custom (uses the activity text as the status state; emoji is optional)
+    - 5: Competing
+
+  </Accordion>
+
   <Accordion title="Exec approvals in Discord">
     Discord supports button-based exec approvals in DMs.
 
@@ -515,6 +568,7 @@ High-signal Discord fields:
 - delivery: `textChunkLimit`, `chunkMode`, `maxLinesPerMessage`
 - media/retry: `mediaMaxMb`, `retry`
 - actions: `actions.*`
+- presence: `activity`, `status`, `activityType`, `activityUrl`
 - features: `pluralkit`, `execApprovals`, `intents`, `agentComponents`, `heartbeat`, `responsePrefix`
 
 ## Safety and operations