Rank registry leaderboard by equally weighted fixture wins

[lukekarrys]

Registry leaderboard cards now rank and display fixture wins, so one slow fixture cannot dominate the cross-fixture headline. Every selected fixture/variation pair has equal weight, including both registry variations on the average tab. The UI and README explain the metric, and fixture filtering recomputes wins and the shared denominator.

Exact ties each earn a win and share a displayed rank. Failed, partial, missing, non-finite, and non-positive results earn no wins or completions; cards show incomplete coverage without inventing timing penalties. Tool filters hide cards while wins remain measured against all registries. Fixture charts retain the underlying timings for judging the size of performance differences.

Validation:

• All 33 combined data/app regression tests pass, including large-fixture domination, ties, invalid results, all-failed contests, and fixture/variation filtering.
• App production build and targeted ESLint/Prettier checks pass.
• The inherited pull-request CI runs data tests and the app build.

Depends on #173; merge the data stack in order #172 → #170 → #173 → #174. Partial-result wording is reconciled with the win metric. The independent warmup fix #171 also passes the combined integration suite (44 tests total and a production build).

Closes #155

[coderabbitai]

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📥 Commits

Reviewing files that changed from the base of the PR and between 2a654d4 and 1b46b73.

📒 Files selected for processing (27)

• .github/workflows/benchmark.yaml
• .github/workflows/test.yml
• README.md
• app/package.json
• app/src/components/header.tsx
• app/src/components/history-chart.tsx
• app/src/components/ui/chart.tsx
• app/src/components/variation/chart.tsx
• app/src/components/variation/index.tsx
• app/src/components/variation/table.tsx
• app/src/hooks/use-history-data.ts
• app/src/lib/history-data.ts
• app/src/lib/registry-leaderboard.ts
• app/src/lib/run-completeness.ts
• app/src/lib/utils.ts
• app/src/types/chart-data.ts
• app/tests/partial-results.test.js
• app/tests/statistics.test.ts
• scripts/benchmark-data.test.js
• scripts/benchmark-statistics.js
• scripts/benchmark-statistics.test.js
• scripts/clean-benchmarks.js
• scripts/generate-chart.js
• scripts/history-data.test.js
• scripts/partial-results.test.js
• scripts/process-results.sh
• scripts/registry-leaderboard.test.js

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