fix(desktop): reserve deep links for main window

Co-authored-by: Rizz <302abe414ca6e3134763d2539bfcf145aea2a63fe5f8455204ed602fd40cf381@buzz.block.builderlab.xyz>
Signed-off-by: Taylor Ho <taylorkmho@gmail.com>

desktop/src/app/App.tsx

@@ -23,7 +23,10 @@ import { CommunityThemeController } from "@/shared/theme/CommunityThemeControlle
 import { useReloadShortcut } from "@/app/useReloadShortcut";
 import { useCloseWindowShortcut } from "@/app/useCloseWindowShortcut";
 import { KnownAgentPubkeysProvider } from "@/features/agents/useKnownAgentPubkeys";
-import { huddleWindowChannelId } from "@/features/huddle/lib/huddleWindow";
+import {
+  acceptsNativeDeepLinks,
+  currentCompanionWindowKind,
+} from "@/app/companionWindow";
 import { useAppOnboardingState } from "@/features/onboarding/hooks";
 import { useMachineOnboardingState } from "@/features/onboarding/machineOnboarding";
 import {
@@ -712,10 +715,12 @@ function MachineBootstrap({ sharedIdentity }: { sharedIdentity: boolean }) {
     [activeCommunity, communityOnboarding.start],
   );
 
-  // Community links are app-global work. A Huddle companion loads the same
+  // Community links are app-global work. Companion windows load the same
   // React tree, but must never race the main window for the native pending-link
-  // queue or replace its dedicated transcript surface with onboarding.
-  const acceptsCommunityDeepLinks = huddleWindowChannelId() === null;
+  // queue or replace their dedicated surface with onboarding.
+  const acceptsCommunityDeepLinks = acceptsNativeDeepLinks(
+    currentCompanionWindowKind(),
+  );
   useEffect(() => {
     if (!acceptsCommunityDeepLinks) return;
 

desktop/src/app/companionWindow.test.mjs

@@ -1,7 +1,10 @@
 import assert from "node:assert/strict";
 import { describe, it } from "node:test";
 
-import { companionWindowKindForLabel } from "./companionWindow.ts";
+import {
+  acceptsNativeDeepLinks,
+  companionWindowKindForLabel,
+} from "./companionWindow.ts";
 
 describe("companionWindowKindForLabel", () => {
   it("classifies focused companion labels", () => {
@@ -17,3 +20,11 @@ describe("companionWindowKindForLabel", () => {
     assert.equal(companionWindowKindForLabel("reader-document"), null);
   });
 });
+
+describe("acceptsNativeDeepLinks", () => {
+  it("reserves the pending-link queue for the main realm", () => {
+    assert.equal(acceptsNativeDeepLinks(null), true);
+    assert.equal(acceptsNativeDeepLinks("huddle"), false);
+    assert.equal(acceptsNativeDeepLinks("agent-activity"), false);
+  });
+});

desktop/src/app/companionWindow.ts

@@ -24,6 +24,13 @@ export function currentCompanionWindowKind(): CompanionWindowKind | null {
   }
 }
 
+/** Whether this realm owns the native pending deep-link queue. */
+export function acceptsNativeDeepLinks(
+  companionKind: CompanionWindowKind | null,
+): boolean {
+  return companionKind === null;
+}
+
 /** Whether this webview is a focused companion rather than the primary app. */
 export function isCompanionWindow(): boolean {
   return currentCompanionWindowKind() !== null;