pub(crate) async fn handle_ui_browser_open(
__arg0: State<AppState>,
caller: Option<Extension<Caller>>,
__arg2: Json<UiBrowserOpenRequest>,
) -> impl IntoResponseExpand description
POST /api/v1/ui/browser/open — backs OpenBrowser. Opens a browser pane
next to the caller’s own pane and records the caller as its owner, so the
Browser*/UI* tools accept it as pane
(docs/specs/SPEC_AGENT_DRIVEN_BROWSER_PANES_2026_10_07.md §3).