chore: add test coverage measurement

[jeanfbrito]

What

Wires test coverage collection and reporting to establish a baseline. Measurement only — no threshold gate, so coverage never blocks a merge.

Starting coverage (baseline)

Measured locally with the new yarn test:coverage (282 pass, 2 skip):

Metric	Coverage
Statements	17.67% (1929/10911)
Branches	13.18% (676/5128)
Functions	11.87% (272/2290)
Lines	17.15% (1749/10195)

The denominator includes currently-untested directories (src/store/, src/ipc/, src/logging/, etc.), so this is a real coverage figure, not a tested-files ratio.

Changes

• jest.config.js — root-level collectCoverageFrom across src/**/*.{ts,tsx} (excludes specs, .d.ts, .jest, public); reporters text-summary + lcov + json-summary; output to coverage/. No coverageThreshold — deliberate.
• package.json — adds test:coverage (same flags as test + --coverage). test left untouched so the default path stays fast.
• .github/workflows/validate-pr.yml — runs yarn test:coverage; uploads coverage/ as an artifact (Linux-only, always(), non-blocking).
• .gitignore — ignores /coverage.

Notes

• Coverage instrumentation verified working under @kayahr/jest-electron-runner (both main + renderer projects) — no v8 fallback needed.
• Artifact upload chosen over Codecov to avoid requiring a CODECOV_TOKEN secret. Swap to codecov-action later if inline PR deltas / trend graphs are wanted.

Follow-ups (out of scope here)

• Add tests for pure-logic quick wins (store/, ipc/, logging/privacy, utils/versionUtils, navigation reducers).
• Once the baseline lands, add a coverageThreshold floor and ratchet it up per PR.

Summary by CodeRabbit

• Tests

  • Implemented automated code coverage reporting in the continuous integration pipeline.

• Chores

  • Updated test configuration to collect and track code coverage metrics during validation.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: cae4eeb4-0e14-4ca0-b460-8f9c02a4f159

📥 Commits

Reviewing files that changed from the base of the PR and between 4856b6b and 6da8330.

📒 Files selected for processing (4)

• .github/workflows/validate-pr.yml
• .gitignore
• jest.config.js
• package.json

📜 Recent review details

⏰ Context from checks skipped due to timeout. (3)

• GitHub Check: check (ubuntu-latest)
• GitHub Check: check (macos-latest)
• GitHub Check: check (windows-latest)

🔇 Additional comments (4)

jest.config.js (1)

2-12: LGTM!

package.json (1)

44-44: LGTM!

.github/workflows/validate-pr.yml (1)

44-51: LGTM!

.gitignore (1)

28-28: LGTM!

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Walkthrough

Adds Jest code coverage configuration (collectCoverageFrom, coverageReporters, coverageDirectory, coveragePathIgnorePatterns) and a test:coverage npm script. The CI validation workflow is updated to run yarn test:coverage and upload the coverage/ directory as a workflow artifact. The /coverage directory is added to .gitignore.

Changes

Coverage Reporting Setup

Layer / File(s)	Summary
Jest coverage config and test:coverage script jest.config.js, package.json	jest.config.js gains collectCoverageFrom targeting src/**/*.{ts,tsx} with exclusions, plus coverageReporters, coverageDirectory, and coveragePathIgnorePatterns. package.json adds a test:coverage script that runs Jest with --coverage and the same flags as the existing test script.
CI workflow and .gitignore integration .github/workflows/validate-pr.yml, .gitignore	The validate-pr workflow replaces yarn test with yarn test:coverage and appends an artifact upload step for coverage/ (ubuntu-latest only, always() condition, warn-if-empty). /coverage is added to .gitignore.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Suggested labels

type: chore

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: adding test coverage measurement infrastructure to the project.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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