fix(platform): await session startup before register IPC returns

Register was racing pushState ahead of sessionReady, leaving the UI on the session-restore shell instead of onboarding.

Co-authored-by: Cursor <[email protected]>

index.js

@@ -1113,7 +1113,7 @@ class PearcordPlatform extends EventEmitter {
     }
   }
 
-  async _bootstrapAfterUser (user) {
+  async _bootstrapAfterUser (user, { waitSessionStartup = false } = {}) {
     this.onboarded = true
     writeOnboardedMarker(this.storagePath)
     this.presence = new PearcordPresence({ userId: user.id })
@@ -1200,7 +1200,9 @@ class PearcordPlatform extends EventEmitter {
     this._lastVoiceSpeakingGossipKey = ''
     this._lastVoiceSpeakingGossipAt = 0
     this.guilds = await this.listGuilds()
-    void this._finishSessionStartup()
+    const startup = this._finishSessionStartup()
+    if (waitSessionStartup) await startup
+    else void startup
     this.emit('user', user)
     return user
   }
@@ -1917,11 +1919,12 @@ class PearcordPlatform extends EventEmitter {
       const user = await this.identity.register({ username, displayName })
       this.guilds = []
       this.mode = 'home'
-      const boot = await this._bootstrapAfterUser(user)
+      const boot = await this._bootstrapAfterUser(user, { waitSessionStartup: true })
       span.end({
         userId: user?.id || null,
         guildCount: this.guilds?.length ?? 0,
         activeChannelId: this.activeChannelId || null,
+        sessionReady: this._sessionReady,
         spanKind: 'identity.register'
       })
       return boot