[ejsmith]

Summary

• keep the Stacks chart mounted while its table query refreshes
• keep the Sessions chart independent from unrelated fetch-client loading activity
• add Playwright coverage proving the Stacks, Events, and Sessions charts retain the same DOM node throughout a held refresh

Behavior

Charts continue showing their existing data during background refreshes and update in place when new data arrives. Initial loads still show the chart skeleton. No API contracts or persisted data are changed.

Verification

• npm run validate
• E2E_URL=https://localhost:36173 npx playwright test e2e/tests/chart-refresh.e2e.ts --project=chromium --workers=1
• local /next/ and /api/v2/about smoke checks returned HTTP 200

Breaking changes

None.

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
Exceptionless.Insulation	37%	35%	286	❌
Exceptionless.Core	76%	67%	10263	✔
Exceptionless.Web	85%	69%	7903	✔
Exceptionless.AppHost	38%	41%	147	❌
Summary	78% (25257 / 32249)	67% (11881 / 17628)	18599	✔