ci: wire up backend and frontend coverage reporting

Backend and frontend jobs now report to separate category series
(backend/frontend) using the multi-category support from #55, closing
the gap where the Playwright job never produced coverage at all.
Frontend coverage comes from Istanbul-instrumented e2e runs (nyc -> lcov),
gated behind VITE_COVERAGE so plain dev/test runs stay uninstrumented.

Also rename the worker to demo-coveragetracker-dev in wrangler.json.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

Author: tbjers

.github/workflows/ci.yml

@@ -33,6 +33,10 @@ jobs:
   test-e2e:
     name: Playwright Tests
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      id-token: write   # mint OIDC token for Worker ingest
+      checks: write     # post PR Check Run
     defaults:
       run:
         working-directory: dashboard
@@ -63,8 +67,8 @@ jobs:
         if: steps.playwright-cache.outputs.cache-hit == 'true'
         run: npx playwright install-deps chromium
 
-      - name: Run Playwright tests
-        run: npx playwright test
+      - name: Run Playwright tests with coverage
+        run: npm run test:e2e:coverage
 
       - name: Upload Playwright report
         uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
@@ -74,6 +78,13 @@ jobs:
           path: dashboard/playwright-report/
           retention-days: 30
 
+      - name: Report coverage
+        uses: CoverageTracker/coverage-tracker/.github/actions/report@v0.3.0
+        with:
+          worker-url: https://demo.coveragetracker.dev
+          coverage-path: dashboard/coverage/lcov.info
+          category: frontend
+
   backend-coverage:
     name: Worker Coverage
     runs-on: ubuntu-latest
@@ -107,3 +118,4 @@ jobs:
         uses: CoverageTracker/coverage-tracker/.github/actions/report@v0.3.0
         with:
           worker-url: https://demo.coveragetracker.dev
+          category: backend

dashboard/.gitignore

@@ -7,3 +7,4 @@ build/
 .dev.vars
 playwright-report/
 test-results/
+.nyc_output/