[eric] browser: tag agent-spawned + pasted browser cards with their home dashboard (were untagged, bled onto all dashboards)

backend/apps/agents/browser/browser_agent.py

@@ -2008,6 +2008,7 @@ async def p_create_browser_card(dashboard_id: str, url: str, parent_session_id:
         width=1280,
         height=800,
         spawned_by=parent_session_id,
+        dashboard_id=dashboard_id,
     )
     dashboard.layout.browser_cards[browser_id] = card
     dashboard.updated_at = datetime.now()

frontend/src/shared/state/dashboardLayoutSlice.ts

@@ -734,6 +734,8 @@ const dashboardLayoutSlice = createSlice({
         width: w,
         height: h,
         zOrder: card.zOrder || state.nextZOrder++,
+        // An agent-spawned card must carry its home dashboard or it renders on EVERY dashboard; trust the backend's tag, fall back to the current dashboard so an old/untagged payload can't bleed.
+        dashboard_id: card.dashboard_id ?? getLastDashboardId() ?? undefined,
       };
     },
 
@@ -1027,6 +1029,8 @@ const dashboardLayoutSlice = createSlice({
         width: width || DEFAULT_BROWSER_CARD_W,
         height: height || DEFAULT_BROWSER_CARD_H,
         zOrder: state.nextZOrder++,
+        // Pasted onto the dashboard the user is looking at, else it bleeds onto every dashboard.
+        dashboard_id: getLastDashboardId() ?? undefined,
       };
     },