Update: Session VQD support and streaming

Implement connection heartbeats and safer 500ms request gap

Fix VQD detection in diagnostics

Add IP check to diagnostics

Add /v1/diagnose endpoint for deep system health check

Prevent server crash on unhandled exceptions

Fix iframe crash in JSDOM and add verbose logging

Port server from Bun to Node.js http module

Operational deploy with camouflage UI

мяу

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