test(e2e): Playwright photos-ready flow + visual evidence (#65)

Drive batch → pick calibration → Mask (Black) → Axis → Measure Calculate → Photos ready against set1-48x2 fixtures on local vite preview. Capture screenshots under tests/e2e/artifacts/; commit README + small evidence JPEGs.
2026-09-15 21:38:45 +00:00
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+# E2E visual artifacts (#65)
+
+Screenshots from `npx playwright test` for Milestone 2 Photos-ready evidence.
+
+## How to run (local box — not ubudual :10880)
+
+```bash
+cd frontend
+npm ci
+npx playwright install chromium   # once per machine
+npm run test:e2e
+```
+
+Or against an already-running preview:
+
+```bash
+npm run build && npm run preview -- --host 127.0.0.1 --port 4173
+# other terminal:
+npx playwright test
+```
+
+Fixtures: `tests/fixtures/set1-48x2/` (L=48, thickness=2) and `set2-31x2p5/` (L=31, thickness=2.5). Black sheet — e2e selects **Black** and may nudge sensitivity.
+
+## Expected screenshots (this folder)
+
+| File | Step |
+|---|---|
+| `01-batch.png` | Batch with fixtures loaded |
+| `02-pick-calibration.png` | Pick calibration |
+| `03-mask.png` | Mask (Black sheet) ready to approve |
+| `04-axis.png` | Length axis |
+| `05-measure.png` | Measure with L / thickness filled |
+| `06-photos-ready.png` | Photos ready lineup (clean + overlay + siblings) |
+
+Large regenerating `*.png` and Playwright `test-results/` / `playwright-report/` are gitignored.
+Committed small evidence JPEGs live in `evidence/` (regenerate with a green `npm run test:e2e`, then re-encode if needed).
+
+## Unit tests
+
+`npm test` must still pass separately from Playwright.