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NewServer launches the SyncFileBrowserMounts goroutine (reads integrationMgr) from the constructor, BEFORE main.go's SetIntegrationManager write — so the init-only happens-before that covers the other Set* fields does NOT hold here, making it a genuine data race (handlers.go:358/360/1433 reads vs server.go:162 write). Converted the field to atomic.Pointer[integrations.Manager]; setter Stores, all 3 readers Load(). Regression test reproduces the concurrent access (clean under -race; flags on the pre-fix plain-pointer field). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>