Include cached token metrics in Integration Test Average Token Usage dashboard panel

[Copilot]

The Integration Test Average Token Usage panel only surfaced input/output/total tokens, which hid cache-driven cost signals. This update adds cached token counts to the panel’s per-test averages and display so token usage is more representative.

• Dashboard token aggregation

  • Extended integration token usage row shaping to include per-run averages for:
    • cacheReadTokens
    • cacheWriteTokens
  • Kept existing sorting behavior by average totalTokens.

• Panel table rendering

  • Updated the token column header from In / Out / Total to:
    • In / Out / Cache Read / Cache Write / Total
  • Rendered cache read/write values inline with existing token metrics for each test row.

• Styling + regression coverage

  • Added token text styling for new cache token spans in the dashboard CSS.
  • Added a focused dashboard test to assert:
    • cached token averages are included in row construction
    • cache token fields/header are rendered.

rows.push({
  inputTokens: Math.round((usage.inputTokens || 0) / runCount),
  outputTokens: Math.round((usage.outputTokens || 0) / runCount),
  cacheReadTokens: Math.round((usage.cacheReadTokens || 0) / runCount),
  cacheWriteTokens: Math.round((usage.cacheWriteTokens || 0) / runCount),
  totalTokens: Math.round((usage.totalTokens || 0) / runCount),
});

[Copilot]

Pull request overview

This PR updates the dashboard’s “Integration Test Average Token Usage” panel so per-test averages include cache read/write token counts, improving visibility into cache-driven costs during integration runs.

Changes:

• Extended integration token usage row construction to compute cacheReadTokens and cacheWriteTokens per-run averages.
• Updated the panel rendering to display In / Out / Cache Read / Cache Write / Total and added new DOM spans for the cache metrics.
• Added CSS styling for the new cache token spans and introduced a focused dashboard test asserting the new fields/header are present.

Show a summary per file

File	Description
scripts/src/dashboard/tests/integration-token-usage.test.ts	Adds a regression test that asserts cached token metrics are included in row construction and rendered in the table.
dashboard/assets/style.css	Extends muted styling to the new cache token metric spans.
dashboard/assets/dashboard.js	Computes per-test cached token averages and renders cache read/write alongside existing token metrics in the panel.

Copilot's findings

• Files reviewed: 3/3 changed files
• Comments generated: 2