feat: update webui extensions, models, and agent config

packages/coding-agent/docs/rpc.md

@@ -426,7 +426,15 @@ Response:
 Execute a shell command and add output to conversation context.
 
 ```json
-{"type": "bash", "command": "ls -la"}
+{"type": "bash", "command": "ls -la", "excludeFromContext": false}
+```
+
+Optional `excludeFromContext` (default `false`): when `true`, the command output is shown in the UI but excluded from the LLM context on the next prompt (equivalent to `!!cmd` in the TUI).
+
+During execution, `bash_update` events stream partial stdout:
+
+```json
+{"type": "bash_update", "command": "ls -la", "partialOutput": "total 48\n"}
 ```
 
 Response: