fix(core): token race condition (#15320)

fix #15318
fix #15310

#### PR Dependency Tree


* **PR #15320** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Bug Fixes**
* Authenticated sessions are now restored automatically when the desktop
app starts.
* Previously saved access tokens are available immediately for
recognized endpoints.
* A problem initializing one saved session no longer prevents other
sessions from loading.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/electron/src/main/auth/auth-session.ts

@@ -143,6 +143,16 @@ export function getAuthSessionBroker(endpoint: string) {
   return broker;
 }
 
+export async function initializeAuthSessions() {
+  for (const endpoint of Object.keys(await readStore())) {
+    try {
+      getAuthSessionBroker(endpoint);
+    } catch (error) {
+      logger.error('failed to initialize auth session', endpoint, error);
+    }
+  }
+}
+
 export function isManagedAuthEndpoint(url: string) {
   try {
     const parsed = new URL(url);

packages/frontend/apps/electron/src/main/protocol.ts

@@ -14,6 +14,7 @@ import {
 import {
   executeAuthSessionRequest,
   getAccessTokenForUrl,
+  initializeAuthSessions,
   isManagedAuthEndpoint,
 } from './auth/auth-session';
 import { buildType, isDev } from './config';
@@ -213,7 +214,9 @@ function allowCors(
   );
 }
 
-export function registerProtocol() {
+export async function registerProtocol() {
+  await initializeAuthSessions();
+
   protocol.handle('assets', request => {
     return handleFileRequest(request);
   });