docs(feishu): clarify oc_ group allowlist vs ou_ command allowFrom for /reset (#26835)

* docs(feishu): clarify oc_* group allowlist vs ou_* command allowFrom

* docs(feishu): avoid direct edits to generated zh-CN docs

---------

Co-authored-by: Tak Hoffman <781889+Takhoffman@users.noreply.github.com>

docs/channels/feishu.md

@@ -317,14 +317,36 @@ After approval, you can chat normally.
 }
 ```
 
-### Allow specific users in groups only
+### Allow specific groups only
 
 ```json5
 {
   channels: {
     feishu: {
       groupPolicy: "allowlist",
-      groupAllowFrom: ["ou_xxx", "ou_yyy"],
+      // Feishu group IDs (chat_id) look like: oc_xxx
+      groupAllowFrom: ["oc_xxx", "oc_yyy"],
+    },
+  },
+}
+```
+
+### Allow specific users to run control commands in a group (e.g. /reset, /new)
+
+In addition to allowing the group itself, control commands are gated by the **sender** open_id.
+
+```json5
+{
+  channels: {
+    feishu: {
+      groupPolicy: "allowlist",
+      groupAllowFrom: ["oc_xxx"],
+      groups: {
+        oc_xxx: {
+          // Feishu user IDs (open_id) look like: ou_xxx
+          allowFrom: ["ou_user1", "ou_user2"],
+        },
+      },
     },
   },
 }