Implementation Plan

Sequence

Finish task planning artifacts and validate the Trellis task.
Build the second wave before/after comparison:
- Capture "before" screenshots from the commit before 5f10b83.
- Capture "after" screenshots from current main.
- Use the existing Playwright mock visual suites so business data is synthetic.
- Write output/playwright/frontend-simplification-wave2-compare/index.html.
Run deployment preflight checks:
- frontend typecheck/build
- UI design rule checker
- deployment env contract checker
- git diff --check
Deploy with the approved safe command:
- SYNC_ENV=0 bash deploy/trialrun/deploy.sh
Run post-deploy readonly verification:
- live smoke readiness
- permission matrix
- PC readonly visual matrix
- mobile entry matrix
- WeCom rendering matrix
Record a concise postdeploy summary under research/, using only relative report references and redacted conclusions.
Run Trellis governance and final whitespace check.

Prefer a temporary git worktree for the "before" commit so the current working tree remains intact.
Do not use destructive checkout/reset commands in the main worktree.
Reuse test-generated screenshots where available:
- output/playwright/pc-core-workflow-visual-wave2/
- output/playwright/pc-detail-mobile-visual-wave3/
If the old and new screenshot filenames differ, normalize them by copying the selected images into the comparison output directory with stable names.

Unexpected dirty files outside the current task or generated comparison output.
Deployment script fails.
Public /ready fails.
Permission matrix reports a blocker.
PC readonly visual matrix reports a P1 blocker.
Any generated report contains secrets, raw payloads, full accounts or full local paths.