[apps] Expose more fields from apps listing endpoints. (#11706)

- [x] Expose app_metadata, branding, and labels in AppInfo.

codex-rs/app-server/README.md

@@ -772,7 +772,7 @@ To enable or disable a skill by path:
 
 ## Apps
 
-Use `app/list` to fetch available apps (connectors). Each entry includes metadata like the app `id`, display `name`, `installUrl`, whether it is currently accessible, and whether it is enabled in config.
+Use `app/list` to fetch available apps (connectors). Each entry includes metadata like the app `id`, display `name`, `installUrl`, `branding`, `appMetadata`, `labels`, whether it is currently accessible, and whether it is enabled in config.
 
 ```json
 { "method": "app/list", "id": 50, "params": {
@@ -790,6 +790,9 @@ Use `app/list` to fetch available apps (connectors). Each entry includes metadat
             "logoUrl": "https://example.com/demo-app.png",
             "logoUrlDark": null,
             "distributionChannel": null,
+            "branding": null,
+            "appMetadata": null,
+            "labels": null,
             "installUrl": "https://chatgpt.com/apps/demo-app/demo-app",
             "isAccessible": true,
             "isEnabled": true
@@ -817,6 +820,9 @@ The server also emits `app/list/updated` notifications whenever either source (a
         "logoUrl": "https://example.com/demo-app.png",
         "logoUrlDark": null,
         "distributionChannel": null,
+        "branding": null,
+        "appMetadata": null,
+        "labels": null,
         "installUrl": "https://chatgpt.com/apps/demo-app/demo-app",
         "isAccessible": true,
         "isEnabled": true