modified: .gitignore

modified:   .vscode/launch.json
	new file:   e2e/playwright-collect-coverage.spec.ts
	modified:   package-lock.json
	modified:   package.json
	modified:   playwright.config.ts
	new file:   scripts/merge-lcov.cjs
	new file:   scripts/normalize-lcov.cjs
	new file:   scripts/playwright-collect-coverage.cjs
	new file:   scripts/remap-and-report.cjs
	modified:   vite.config.ts
	new file:   vitest.config.ts

scripts/remap-and-report.cjs

@@ -0,0 +1,35 @@
+// scripts/remap-and-report.cjs
+const fs = require('fs');
+const path = require('path');
+const libCoverage = require('istanbul-lib-coverage');
+const libSourceMaps = require('istanbul-lib-source-maps');
+const libReport = require('istanbul-lib-report');
+const reports = require('istanbul-reports');
+
+const out = libCoverage.createCoverageMap({});
+const dir = path.join(process.cwd(), '.nyc_output');
+if (!fs.existsSync(dir)) {
+  console.error('.nyc_output not found');
+  process.exit(2);
+}
+const files = fs.readdirSync(dir).filter(f => f.endsWith('.json'));
+for (const f of files) {
+  const data = JSON.parse(fs.readFileSync(path.join(dir, f), 'utf8'));
+  out.merge(data);
+}
+
+// Remap using source maps
+const sourceMapStore = libSourceMaps.createSourceMapStore();
+const transformed = sourceMapStore.transformCoverage(out);
+const remapped = transformed.map;
+
+// Write reports
+const outDir = path.join(process.cwd(), 'coverage-reports', 'e2e');
+fs.mkdirSync(outDir, { recursive: true });
+const context = libReport.createContext({ dir: outDir, coverageMap: remapped });
+
+// lcov + html
+reports.create('lcovonly', {}).execute(context);
+reports.create('html', {}).execute(context);
+
+console.log('Wrote remapped e2e coverage to', outDir);