feat(host,desktop): push a followed transcript's pages to the panels that draw it

apps/desktop/src/main/ipc/register-desktop-ipc.ts

@@ -7,7 +7,11 @@ import { MAC_TERMINAL_PORT_CHANNEL } from "@luke/features/mac-terminal-wire";
 import { TERMINAL_PORT_CHANNEL } from "@luke/features/terminal-acts";
 import { highlightSnippet } from "@luke/host";
 import { createActPortHandler, type PlatformActProcedures } from "@luke/host/act-port";
-import { createHostActRouter, type PlatformActRows } from "@luke/host/act-router";
+import {
+  createHostActRouter,
+  type PlatformActRows,
+  transcriptFollowActRows,
+} from "@luke/host/act-router";
 import { ACT_KIND } from "@luke/host/acts";
 import type { AppStateSnapshot } from "@luke/host/app-state";
 import { channels } from "@luke/host/bridge";
@@ -117,6 +121,14 @@ export function registerDesktopIpc(services: DesktopServices): void {
       experimentOn: () =>
         experimentOn(state.snapshot().settings?.experiments ?? NO_EXPERIMENTS, EXPERIMENT.BROWSER),
     }),
+    ...transcriptFollowActRows<WebContents>({
+      host: operator.host,
+      deliver: (sender, changed) => {
+        if (!sender.isDestroyed()) sender.send(channels.onTranscript, changed);
+      },
+      whenGone: whenPageGone,
+      run,
+    }),
     [ACT_KIND.UPDATE_CHECK]: () => updates.check(),
     [ACT_KIND.UPDATE_INSTALL]: () => updates.install(),
     [ACT_KIND.UPDATE_OPEN_RELEASE]: () => updates.openLatestRelease(),

apps/web/src/app/web-host.ts

@@ -34,6 +34,8 @@ import {
   type HostActDependencies,
   type PlatformActRows,
   refusedRows,
+  type TranscriptFollowActKind,
+  transcriptFollowActRows,
 } from "@luke/host/act-router";
 import { ACT_KIND } from "@luke/host/acts";
 import { AgentNoticeDoors } from "@luke/host/agent-notices";
@@ -250,6 +252,7 @@ const noticeDoors = (
 function platformRows(
   http: HttpClient.HttpClient,
   doors: WebNoticeDoors,
+  follows: Pick<PlatformActRows<WebSender>, TranscriptFollowActKind>,
 ): PlatformActRows<WebSender> {
   const feedback = feedbackDelivery({ url: new URL(FEEDBACK_PATH, location.origin).href });
   return {
@@ -263,6 +266,7 @@ function platformRows(
     [ACT_KIND.NOTIFICATIONS_TEST]: () => doors.postTest(),
     [ACT_KIND.FEEDBACK_SEND]: ({ submission }) =>
       Effect.provideService(feedback.deliver(submission), HttpClient.HttpClient, http),
+    ...follows,
   };
 }
 
@@ -431,7 +435,21 @@ const composedWeb = (run: WebHostOptions["run"]) =>
       const made = yield* createInProcessBridge<WebSender>({
         sender: window,
         routerFor: () =>
-          createHostActRouter(hostRowDependencies(operator), platformRows(http, doors)),
+          createHostActRouter(
+            hostRowDependencies(operator),
+            platformRows(
+              http,
+              doors,
+              // The tab's transcripts are followed at the host and each page said to the page, which is
+              // the tab's one panel and is gone only with the host.
+              transcriptFollowActRows<WebSender>({
+                host: operator.host,
+                deliver: (_page, changed) => events?.onTranscript(changed),
+                whenGone: () => undefined,
+                run,
+              }),
+            ),
+          ),
         run,
         state,
         windowFacts: () => ({ fullScreen: document.fullscreenElement !== null }),