Q88: a sign-in is saved only if a run can use and renew it

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/shared/ipc.ts

@@ -28,7 +28,6 @@ export const IPC_CHANNELS = {
   markChatSpaceRead: "agentcompany:mark-chat-space-read",
   saveProviderCredential: "agentcompany:save-provider-credential",
   revokeProviderCredential: "agentcompany:revoke-provider-credential",
-  launchProviderSignIn: "agentcompany:launch-provider-sign-in",
   startProviderOAuth: "agentcompany:start-provider-oauth",
   cancelProviderOAuth: "agentcompany:cancel-provider-oauth",
   checkProviderHealth: "agentcompany:check-provider-health",