refactor(perf): move to typescript

[akashdeep931]

Description

First TypeScript migration for the perf package. Source is now written in TypeScript and namespaced types are fully separated from modular types:

• Namespaced types live in lib/types/namespaced.ts and are aligned with the previous index.d.ts surface. This keeps the migration low-risk and makes it straightforward to remove namespaced support later.
• Modular types live in lib/types/modular.ts and are consumed only by the modular API; the same file also contains the modular implementation (getPerformance, initializePerformance, trace, httpMetric, newScreenTrace, startScreenTrace). lib/types/internal.ts defines PerformanceModuleWithModularArg for internal modular-call typing.
• The package continues to build with react-native-builder-bob (ESM + TypeScript declaration targets). No intentional changes to the public API or runtime behavior.

Breaking Changes

No consumer-facing breaking changes. Same public API and type surface; only the implementation and type file layout have changed (JS → TS, types split into types/namespaced.ts and types/modular.ts).

Related issues

Release Summary

@react-native-firebase/perf: TypeScript migration; namespaced and modular types separated into types/namespaced.ts and types/modular.ts. No API changes.

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• My change supports the following platforms;
  • Android
  • iOS
  • Other (macOS, web)
• My change includes tests;
  • e2e tests added or updated in packages/**/e2e (existing e2e unchanged; type-test and build validate TS)
  • jest tests added or updated in packages/**/__tests__ (existing tests updated for TS where applicable)
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

• yarn compile at repo root (builds all packages including perf).
• Run perf type-test: ensure packages/perf/type-test.ts is included in root tsc and passes.
• Run existing perf e2e: packages/perf/e2e/perf.e2e.js.
• Run perf jest tests if present: packages/perf/__tests__/.
• Verify local test app (e.g. tests app with perf) runs and can use perf.

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Project	Deployment	Actions	Updated (UTC)
react-native-firebase	Ready	Preview, Comment	Feb 25, 2026 6:26pm