Improve stack and event refresh behavior, metrics, and tooltip contrast

[ejsmith]

Summary

• Use theme-aware foreground and muted colors for tag tooltip keyboard shortcuts in both light and dark themes.
• Calculate project and stack user cardinality over the same seven-day window.
• Stabilize Stack and Events reactive loading so semantically unchanged parameters do not churn state and each paging transition issues one list request.
• Treat aborted or malformed successful response bodies as errors instead of caching ProblemDetails as successful query data.
• Migrate all 73 FetchClient imports from the moved @exceptionless/fetchclient 0.44.0 package to the current @foundatiofx/fetchclient 1.3.3 package and refresh the lockfile.
• Add focused unit coverage plus Stack and Events chaos tests covering paging, detail teardown and navigation, visibility churn, background ingestion, burst notifications, and route remounts.

Why

The keyboard shortcut inherited the tooltip inverse styling even though it is rendered on a popover-colored surface, which made the icon nearly invisible. Stack user metrics also compared a seven-day stack count with an all-time project count; besides producing an inconsistent percentage, the broader project query could reach legacy indices and return a 500.

Runtime effect tracing found that eight Stack paging transitions issued 15 list requests. Slower CI tracing then exposed the equivalent timing-sensitive dependency churn on the Events list: the first cursor transition could issue two identical requests. Both list effects now depend on stable semantic request keys and invoke their loaders untracked, reducing eight transitions to eight requests on each page.

Repeated route remounts could also abort a response body read after an HTTP 200, causing FetchClient to return ProblemDetails as successful data; TanStack Query then cached that object where array data was expected, eventually producing reactive runtime failures. Deserialization failures no longer enter the success cache. The package-level behavior is tracked upstream in FoundatioFx/FetchClient#31.

The FetchClient repository and npm scope moved to FoundatioFX. This updates the application from the final @exceptionless/fetchclient release to npm latest for the supported package. The latest package retains the exports used by the application; Exceptionless also supplies its own errorCallback, preserving its existing ProblemDetails error behavior across the upstream major-version change.

Dependency review

• Current: @exceptionless/fetchclient 0.44.0
• Target: @foundatiofx/fetchclient 1.3.3 (latest, published 2026-03-02)
• Source: official repository, npm package, and v0.44.0...v1.3.3 comparison
• Compatibility: all 73 imports resolve; Svelte and TypeScript report 0 errors and 0 warnings; the production build succeeds
• Security: npm audit --omit=dev reports no advisory path through @foundatiofx/fetchclient; existing unrelated repository advisories remain outside this PR

Verification

• npm ci
• npm run validate
• npm run test:unit: 29 files / 326 tests passed
• npm run build
• Focused Vitest suite from the effect work: 45 passed
• Full local Chromium E2E suite from the effect work: 9 passed
• Events chaos regression repeated three times: 3 passed
• Stack chaos regression: eight page transitions / eight list requests; five detail mount cycles / zero list requests; 30 burst notifications / one list request; zero runtime or network errors
• Events chaos regression: eight page transitions / eight list requests; visibility and background resume / at most one list request each; 30 burst notifications / one list request; bounded event and stack detail requests; zero runtime or network errors
• Local Aspire App was healthy during effect validation; /next/ and /api/v2/about returned 200

Breaking changes

None.

[ejsmith]

/preview

[github-actions]

Preview deployed

• App: https://dev-app.exceptionless.io
• Collector: https://dev-collector.exceptionless.io
• Commit: 90329c84302e
• Version: 8.7.1-preview.issue.fix-stack-metrics-and-tag-tooltip.0.7
• Workflow run: view logs

[github-actions]

Package	Line Rate	Branch Rate	Complexity	Health
Exceptionless.Core	74%	66%	9587	➖
Exceptionless.AppHost	38%	40%	139	❌
Exceptionless.Insulation	37%	35%	286	❌
Exceptionless.Web	84%	67%	6935	✔
Summary	77% (22870 / 29790)	66% (10515 / 16026)	16947	✔