Proactive slowness detection with status bar warning

[EhabY]

Follow-up to AIGOV-193.

When a user is connected to a workspace and the network is degraded, the extension should detect it and surface it in the status bar.

Detection

The extension already polls NetworkInfo from the CLI proxy every 3 seconds. We add three configurable thresholds:

• coder.networkThreshold.latencyMs (default: 200) - latency above this triggers a warning
• coder.networkThreshold.downloadMbps (default: 5) - download speed below this triggers a warning
• coder.networkThreshold.uploadMbps (default: 0) - upload speed below this triggers a warning (disabled by default)

Setting any threshold to 0 disables that check. Each threshold is evaluated independently. To avoid flicker, the condition must persist across 3 consecutive polls (~9 seconds) before triggering, and 3 consecutive healthy polls to clear.

Status bar UX

• The existing network status bar item turns yellow (statusBarItem.warningBackground) when any threshold is crossed.

• The hover tooltip shows all live metrics with warning markers after the offending values:

  Latency: 350ms ⚠ (threshold: 200ms)
  Download: 45.2 Mbps
  Upload: 12.1 Mbps
  Connection: us-east (relay)
  Click for diagnostics
  

• Click action depends on what's degraded:

  • Only latency is bad: runs Ping Workspace
  • Only download/upload is bad: runs Speed Test
  • Multiple thresholds crossed: opens a QuickPick to choose between Ping, Speed Test, and Support Bundle

• In normal state, the tooltip shows the same metrics without warning markers.

Files to change

• src/remote/sshProcess.ts - threshold checking, warning state, tooltip, click handler
• package.json - new setting declarations

Part of AIGOV-193.