ci(ckeditor5): upload aggregate package coverage to Codecov

CI never produced coverage for packages/ckeditor5 (it ran in the catch-all
"rest of the tests" step without --coverage), and the codecov-action steps
upload only explicit hardcoded paths — so the package never reached Codecov.

- dev.yml: run the ckeditor5 browser-mode suite with --coverage in its own
  step (sharing the chromedriver setup the other CKEditor tests use), upload
  the lcov + junit results to Codecov under a new `ckeditor5` flag, and drop
  ckeditor5 from the no-coverage catch-all so it isn't run twice.
- vitest.config.ts: emit junit results and write coverage to
  test-output/vitest/coverage (matches the other suites' convention and lands
  under the already-gitignored test-output/ instead of an untracked coverage/).
- codecov.yml: add the `ckeditor5` flag scoped to packages/ckeditor5/src/.

This also makes CI enforce the package's 100% coverage gate (the threshold
already lived in vitest.config.ts but was never exercised under --coverage).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.github/workflows/dev.yml

@@ -130,6 +130,29 @@ jobs:
           pnpm run --filter=ckeditor5-mermaid test
           pnpm run --filter=ckeditor5-math test
 
+      - name: Run the CKEditor 5 aggregate tests
+        run: |
+          export CHROMEDRIVER_PATH=$(which chromedriver || find /usr/local/share -name chromedriver -type f 2>/dev/null | head -1)
+          echo "Using chromedriver at: $CHROMEDRIVER_PATH"
+          pnpm run --filter=ckeditor5 test --coverage
+
+      - name: Upload ckeditor5 coverage to Codecov
+        uses: codecov/codecov-action@v7
+        if: always()
+        with:
+          files: packages/ckeditor5/test-output/vitest/coverage/lcov.info
+          flags: ckeditor5
+          fail_ci_if_error: false
+
+      - name: Upload ckeditor5 test results to Codecov
+        uses: codecov/test-results-action@v1
+        if: ${{ !cancelled() }}
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: packages/ckeditor5/test-output/vitest/junit.xml
+          flags: ckeditor5
+          fail_ci_if_error: false
+
       - name: Run the desktop tests
         run: pnpm run --filter=desktop test --coverage
 
@@ -171,7 +194,7 @@ jobs:
           fail_ci_if_error: false
 
       - name: Run the rest of the tests
-        run: pnpm run --filter=\!client --filter=\!standalone --filter=\!server --filter=\!desktop --filter=\!commons --filter=\!ckeditor5-mermaid --filter=\!ckeditor5-math test
+        run: pnpm run --filter=\!client --filter=\!standalone --filter=\!server --filter=\!desktop --filter=\!commons --filter=\!ckeditor5-mermaid --filter=\!ckeditor5-math --filter=\!ckeditor5 test
 
   build_docker:
     name: Build Docker image

codecov.yml

@@ -41,6 +41,10 @@ flags:
     paths:
       - packages/commons/src/
     carryforward: true
+  ckeditor5:
+    paths:
+      - packages/ckeditor5/src/
+    carryforward: true
 
 comment:
   layout: "condensed_header, condensed_files, condensed_footer"

packages/ckeditor5/vitest.config.ts

@@ -13,6 +13,7 @@ export default defineConfig({
         include: ["src/**/*.spec.ts"],
         globals: true,
         watch: false,
+        reporters: ["default", ["junit", { outputFile: "./test-output/vitest/junit.xml", addFileAttribute: true }]],
         coverage: {
             thresholds: {
                 lines: 100,
@@ -21,6 +22,7 @@ export default defineConfig({
                 statements: 100
             },
             provider: "v8",
+            reportsDirectory: "./test-output/vitest/coverage",
             // Restrict to this package's own sources. The aggregate imports the sibling
             // @triliumnext/ckeditor5-* workspace packages, whose `src/` would otherwise bleed
             // into this report; they carry their own 100% coverage gates in their own packages.