[eric] apps: edit selected App in place, no duplicate on launch

frontend/src/app/pages/AgentChat/AgentChat.tsx

@@ -407,6 +407,9 @@ const AgentChat: React.FC<AgentChatProps> = ({ sessionId: sessionIdProp, onClose
       // session lands dashboard_id=null, drops out of the reconcile filter, and its card vanishes
       // the instant you send (looked like "the chat quit when I clicked an option").
       if (session?.dashboard_id) config.dashboard_id = session.dashboard_id;
+      // Editing an existing app: bind the launch to it so the backend edits in
+      // place instead of seeding a duplicate empty app (App Builder mode only).
+      if (msg.selectedAppIds?.length) config.selected_app_output_ids = msg.selectedAppIds;
       dispatch(
         launchAndSendFirstMessage({ draftId: id, config, prompt: msg.prompt, mode, model, images: msg.images, contextPaths: msg.contextPaths, forcedTools: msg.forcedTools, attachedSkills: msg.attachedSkills, selectedBrowserIds: msg.selectedBrowserIds, selectedAppIds: msg.selectedAppIds, selectedSettingIds: msg.selectedSettingIds })
       ).then((action) => {

frontend/src/app/pages/Dashboard/DashboardToolbar.tsx

@@ -49,6 +49,7 @@ interface Props {
     forcedTools?: string[],
     attachedSkills?: Array<{ id: string; name: string; content: string }>,
     selectedBrowserIds?: string[],
+    selectedAppIds?: string[],
   ) => void;
   onAddView: (outputId: string) => void;
   onHistoryResume: (sessionId: string) => void;
@@ -213,8 +214,9 @@ const DashboardToolbar = React.forwardRef<HTMLDivElement, Props>(
         forcedTools?: string[],
         attachedSkills?: Array<{ id: string; name: string; content: string }>,
         selectedBrowserIds?: string[],
+        selectedAppIds?: string[],
       ) => {
-        onSend(message, mode, model, images, contextPaths, forcedTools, attachedSkills, selectedBrowserIds);
+        onSend(message, mode, model, images, contextPaths, forcedTools, attachedSkills, selectedBrowserIds, selectedAppIds);
       },
       [onSend, mode, model],
     );

frontend/src/app/pages/Dashboard/hooks/lifecycle/useAgentSpawn.ts

@@ -127,6 +127,7 @@ export function useAgentSpawn({
       forcedTools?: string[],
       attachedSkills?: Array<{ id: string; name: string; content: string }>,
       selectedBrowserIds?: string[],
+      selectedAppIds?: string[],
     ) => {
       setToolbarOpen(false);
       report('dashboard', 'agent_created', { mode, model, has_images: !!images?.length, has_context: !!contextPaths?.length, has_browser: !!selectedBrowserIds?.length });
@@ -148,6 +149,9 @@ export function useAgentSpawn({
       }
 
       const config: AgentConfig = { name: 'New chat', model, mode, dashboard_id: dashboardId };
+      // Editing an existing app: bind the launch to it so the backend edits in
+      // place instead of seeding a duplicate empty app (App Builder mode only).
+      if (selectedAppIds?.length) config.selected_app_output_ids = selectedAppIds;
 
       dispatch(
         launchAndSendFirstMessage({
@@ -161,6 +165,7 @@ export function useAgentSpawn({
           forcedTools,
           attachedSkills,
           selectedBrowserIds,
+          selectedAppIds,
           expand: expandNewChats,
         }),
       ).then((action) => {

frontend/src/shared/state/agentsSlice.ts

@@ -125,6 +125,7 @@ export interface AgentConfig {
   max_turns?: number;
   target_directory?: string;
   dashboard_id?: string;
+  selected_app_output_ids?: string[];
 }
 
 export interface HistorySession {