fix(webview): emit Playwright CT coverage LCOV

Author: edelauna

knip.json

@@ -32,7 +32,7 @@
 				"source-map",
 				"tailwindcss",
 				"tailwindcss-animate",
-				"monocart-coverage-reports"
+				"monocart-reporter"
 			]
 		},
 		"apps/cli": {

pnpm-lock.yaml

@@ -7,6 +7,9 @@
 
 # testing
 /coverage
+/coverage-ct
+/monocart-report
+/assets/monocart-coverage-app.js
 /playwright-report
 /test-results
 /playwright/.cache

webview-ui/.gitignore

@@ -50,3 +50,4 @@ Codecov tracks `webview-ui` coverage under the `webview-ui` flag.
 - If Docker is unavailable, `pnpm test:visual` can help diagnose test code, but do not create or update committed baselines from the host rendering environment.
 - Keep visual tests limited to components supported by the current Playwright harness. Add shared extension state, translation, React Query, or other provider support before snapshotting components that require it.
 - The current baseline naming assumes a single Chromium project. Include `{projectName}` in `snapshotPathTemplate` before adding another browser project.
+- Import `test` and `expect` from `webview-ui/playwright/coverage-fixture.ts` (not directly from `@playwright/experimental-ct-react`) so the auto-fixture collects V8 coverage for `monocart-reporter` — that's what produces `coverage-ct/lcov.info` for the Codecov upload.

webview-ui/AGENTS.md

@@ -107,7 +107,7 @@
 		"@vitest/ui": "4.1.9",
 		"babel-plugin-react-compiler": "1.0.0",
 		"jsdom": "26.1.0",
-		"monocart-coverage-reports": "^2.12.12",
+		"monocart-reporter": "^2.9.20",
 		"vite": "8.1.0",
 		"vitest": "4.1.9"
 	}