test: regenerate visual regression baselines for main

[pietrushnic]

Previous baselines were generated with layout-fixes CSS (.slidev-layout padding-top: 0.5rem) that is not on main. This caused 8 visual regression test failures (2-28% pixel diff) due to a consistent ~40px vertical content shift.

Regenerated baselines from clean origin/main state to match actual Slidev default padding.

% SLIDEV_PORT=8002 ./scripts/run-tests.sh
Setting up test presentation repo...
Test repo ready
Starting dev server on port 8002...
Waiting for dev server to be ready...
Dev server is ready
Running Playwright tests...

Running 20 tests using 1 worker

  ✓   1 [chromium] › tests/smoke.spec.ts:17:3 › Dev Server › responds on configured port (2.7s)
  ✓   2 [chromium] › tests/smoke.spec.ts:22:3 › Dev Server › theme loads without console errors (8.8s)
  ✓   3 [chromium] › tests/smoke.spec.ts:44:3 › Dev Server › src: directive renders content (2.7s)
  ✓   4 [chromium] › tests/smoke.spec.ts:55:3 › Navigation › all slides load without OOM (20.9s)
  ✓   5 [chromium] › tests/smoke.spec.ts:64:3 › Navigation › presenter mode accessible (711ms)
  ✓   6 [chromium] › tests/smoke.spec.ts:69:3 › Navigation › overview mode accessible (527ms)
  ✓   7 [chromium] › tests/smoke.spec.ts:76:3 › Assets › images load without errors (2.2s)
  ✓   8 [chromium] › tests/smoke.spec.ts:92:3 › Keyboard Navigation › vim keys navigate slides (h/l) (3.3s)
  ✓   9 [chromium] › tests/smoke.spec.ts:110:3 › Keyboard Navigation › vim keys navigate slides (j/k) (3.8s)
  ✓  10 [chromium] › tests/visual-regression.spec.ts:13:3 › Layouts › cover (3.4s)
  ✓  11 [chromium] › tests/visual-regression.spec.ts:23:3 › Layouts › two-cols (3.2s)
  ✓  12 [chromium] › tests/visual-regression.spec.ts:33:3 › Layouts › two-cols-header (3.2s)
  ✓  13 [chromium] › tests/visual-regression.spec.ts:43:3 › Layouts › quote (3.1s)
  ✓  14 [chromium] › tests/visual-regression.spec.ts:55:3 › Components › figure with figcaption (3.2s)
  ✓  15 [chromium] › tests/visual-regression.spec.ts:67:3 › Components › Footnotes (3.4s)
  ✓  16 [chromium] › tests/visual-regression.spec.ts:78:3 › Components › table (3.2s)
  ✓  17 [chromium] › tests/visual-regression.spec.ts:91:3 › Footer › visible on content slides (2.4s)
  ✓  18 [chromium] › tests/visual-regression.spec.ts:99:3 › Footer › hidden on cover slides (2.5s)
  ✓  19 [chromium] › tests/visual-regression.spec.ts:107:3 › Presenter Mode › renders with notes panel (3.7s)
  ✓  20 [chromium] › tests/visual-regression.spec.ts:119:3 › Font Size Classes › code-10px and code-12px apply correctly (3.2s)

  20 passed (1.4m)
All tests passed!
Cleaning up...
slidev-test-server-996562

[macpijan]

It actually resolve problem reported in: #27 (comment)