refactor(interact): separate runtime actions from ui projection

tauri/src/runtime/coordination/lineup-runtime.test.ts

@@ -105,6 +105,10 @@ describe("LineUpRuntime", () => {
     ]));
     const chat = runtime.openApp("chat");
     expect(chat.app_scope).toBe("chat");
+    expect(chat.runtime.dispatch).toBe(chat.dispatch);
+    expect(chat.runtime.interactions).toBe(chat.interactions);
+    expect(chat.runtime.tasks).toBe(chat.tasks);
+    expect(chat.ui.snapshot).toBe(chat.snapshot);
     expect(chat.snapshot()).toMatchObject({ app_scope: "chat", active: false });
 
     await runtime.login(login);

tauri/src/runtime/coordination/lineup-runtime.ts

@@ -253,40 +253,43 @@ export class LineUpRuntime {
     const app = this.apps.get(appScope);
     if (!app?.enabled) throw new Error(`The ${appScope} Core App is unavailable.`);
     if (appScope !== "chat") throw new Error(`The ${appScope} Core App SDK is not registered.`);
-    return {
-      app_scope: "chat",
+    const ui = {
       snapshot: () => this.chatView(),
-      subscribe: listener => {
+      subscribe: (listener: (view: ChatViewModel) => void) => {
         this.chatStateListeners.add(listener);
         listener(this.chatView());
         return () => this.chatStateListeners.delete(listener);
       },
-      subscribeEvents: listener => this.onEvent(event => {
-        // Agent content has a separate, scope-checked SDK channel. Keeping it
-        // out of the generic event stream prevents a Chat renderer from
-        // accidentally consuming an unprojected delivery path.
+      subscribeEvents: (listener: (event: Exclude<RuntimeAppEvent, { type: "agent-message" }>) => void) => this.onEvent(event => {
         if (event.type !== "agent-message") listener(event);
       }),
-      subscribeAgentMessages: listener => {
+      subscribeAgentMessages: (listener: (message: AgentChatMessage) => void) => {
         this.chatMessageListeners.add(listener);
         return () => this.chatMessageListeners.delete(listener);
       },
-      listAgentMessages: afterMessageID => this.listChatMessages(afterMessageID),
-      acknowledgeAgentMessage: messageID => this.acknowledgeChatMessage(messageID),
-      dispatch: action => this.dispatchChatAction(action),
-      interactions: {
-        submit: (callID, result) => this.submitToolCall(callID, result),
-        cancel: (callID, reason) => this.cancelToolCall(callID, reason),
-        expire: callID => this.expireToolCall(callID),
-        read: callID => this.toolCalls().find(record => record.call_id === callID),
-        loadDraft: callID => this.getToolDraft(callID),
-        saveDraft: (callID, values) => this.saveToolDraft(callID, values),
-        clearDraft: callID => this.clearToolDraft(callID),
-      },
-      tasks: {
-        requestCancel: operationID => this.requestTaskCancel(operationID),
-        read: operationID => this.tasks().find(task => task.operation_id === operationID),
-      },
+      listAgentMessages: (afterMessageID?: string) => this.listChatMessages(afterMessageID),
+      acknowledgeAgentMessage: (messageID: string) => this.acknowledgeChatMessage(messageID),
+    };
+    const interactions = {
+      submit: (callID: string, result: JsonObject) => this.submitToolCall(callID, result),
+      cancel: (callID: string, reason: string) => this.cancelToolCall(callID, reason),
+      expire: (callID: string) => this.expireToolCall(callID),
+      read: (callID: string) => this.toolCalls().find(record => record.call_id === callID),
+      loadDraft: (callID: string) => this.getToolDraft(callID),
+      saveDraft: (callID: string, values: JsonObject) => this.saveToolDraft(callID, values),
+      clearDraft: (callID: string) => this.clearToolDraft(callID),
+    };
+    const tasks = {
+      requestCancel: (operationID: string) => this.requestTaskCancel(operationID),
+      read: (operationID: string) => this.tasks().find(task => task.operation_id === operationID),
+    };
+    const runtime = { dispatch: (action: ChatAction) => this.dispatchChatAction(action), interactions, tasks };
+    return {
+      app_scope: "chat",
+      runtime,
+      ui,
+      ...ui,
+      ...runtime,
     };
   }