GrowthLab v0.1.0-alpha.4 — local measurement dashboard

What changed

• Added a browser-local measurement panel for user-supplied CSV exports.
• Shows descriptive means, sample sizes, date range and arithmetic baseline comparisons.
• Keeps rows in browser memory and makes no provider request.
• Added bounded parser coverage and updated the public progress/site status to 57%.

Evidence boundary

The summary is labelled MEASURED because it is computed from the supplied file. It does not claim causality, statistical significance, rankings, traffic, revenue or conversion lift. This is a source prerelease; no standalone binaries or installers are attached.

Local validation

• Rust tests: 919 tests per binary, 917 passed, zero failures, two inherited ignored tests.
• UI tests: 170 passed.
• UI typecheck, i18n/style checks and production build passed.
• Synthetic Chrome upload smoke passed with no console warnings or errors.
• GitHub Actions remains manually disabled; checks run locally.