fix: handle expect.soft in Harness runtime

[V3RON]

Summary

• make expect.soft work correctly in the Harness runtime by wiring Vitest's per-test expectation context during test execution
• preserve the original soft assertion stack so Metro highlights the user assertion instead of Harness internals
• keep internal Metro frame collapsing scoped to installed @react-native-harness/* packages and document the current expect.soft reporting limitation

Verification

• pnpm nx build @react-native-harness/runtime
• pnpm nx build @react-native-harness/bundler-metro
• pnpm nx test @react-native-harness/runtime
• pnpm vitest run src/tests/withRnHarness.test.ts
• pnpm harness ./src/tests/smoke.harness.ts

Limitation

• when multiple soft assertions fail in one test, Harness reports all failure messages, but only the first failure currently contributes the highlighted stack trace and code frame

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Project	Deployment	Actions	Updated (UTC)
react-native-harness	Ready	Preview, Comment	Apr 17, 2026 8:20am