The agent runs apt/dnf/winget/windows on their own schedules (per-scanner
agent_subsystems rows still exist server-side) but the UI now collapses
them into a single "System Update Scanner" row. Chips on the description
line (APT, DNF, WINGET, Windows Update) light up from
agent.metadata.available_scanners — the real signal from
syncAvailableScanners — rather than the old os_type string heuristic
that sniffed "fedora" / "debian" out of the platform field.
The row is synthesized client-side from the per-scanner backers; no
'updates' DB row needed (the zombie kill landed in 7fb61a36). Toggle,
auto-run, interval, and Scan on the unified row cascade to every backing
per-scanner subsystem that actually exists for the agent.
Widened AgentSubsystem.subsystem type to string — the narrow union was
stale (DB has apt/dnf/winget/windows/storage/system/docker, plus the
synthetic 'updates' aggregate the UI produces).
Removed the os-string heuristic helper and its console.log noise.
03c72cb438