TT-7494 Offline to online sync didn't run.

[sarahentzel]

possible race condition: wait for the backup restore to be done before checking projects loaded

[Copilot]

Pull request overview

This PR addresses TT-7494 by eliminating a startup race where “Go Online” could trigger ITFSYNC before the IndexedDB backup restore finished, causing offlineproject-based filtering to run against an empty in-memory cache.

Changes:

• Ensure ITFSYNC waits for restoreBackup to finish on Electron online startup so offlineproject records are present in memory.
• Make the IndexedDB→memory “refill” logic idempotent by updating existing records instead of throwing on duplicates, and add coverage for that behavior.
• Improve robustness when determining export/import baseline dates and offline project selection by falling back to direct memory/backup queries when React-closure reads are stale.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/renderer/src/store/importexport/electronExport.tsx	Adds fallback queries for offlineproject timing and ensures needed records are present for ITFSYNC/FULLBACKUP filtering.
src/renderer/src/Sources.tsx	Awaits restoreBackup before running ITFSYNC during Electron online startup to prevent an empty-memory race.
src/renderer/src/crud/syncToMemory.ts	Makes backupToMemory idempotent by updating existing records instead of failing on addRecord.
src/renderer/src/crud/syncToMemory.test.ts	Adds a unit test validating backupToMemory updates an existing record without throwing.