fix: separate Jest and nyc coverage outputs to fix Codecov upload

Jest and nyc were both writing to `coverage/lcov.info`, causing nyc to
overwrite Jest output. Now each writes to its own subdirectory and the
codecov action explicitly uploads both files.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ggazzo

.github/workflows/ci-test-unit.yml

@@ -51,3 +51,4 @@ jobs:
           flags: unit
           verbose: true
           token: ${{ secrets.CODECOV_TOKEN }}
+          files: apps/meteor/coverage/jest/lcov.info,apps/meteor/coverage/nyc/lcov.info

apps/meteor/jest.config.ts

@@ -55,4 +55,5 @@ export default {
 	],
 	coverageProvider: 'v8',
 	collectCoverage: true,
+	coverageDirectory: 'coverage/jest',
 } satisfies Config;

apps/meteor/package.json

@@ -26,7 +26,7 @@
 		".testunit:definition": "mocha --config ./.mocharc.definition.js",
 		".testunit:jest": "TZ=UTC TS_NODE_COMPILER_OPTIONS='{\"allowJs\": false}' jest",
 		".testunit:server": "mocha --config ./.mocharc.js",
-		".testunit:server:cov": "nyc -r text -r lcov mocha --config ./.mocharc.js",
+		".testunit:server:cov": "nyc --report-dir coverage/nyc -r text -r lcov mocha --config ./.mocharc.js",
 		"build:ci": "METEOR_DEBUG_BUILD=1 METEOR_DISABLE_OPTIMISTIC_CACHING=1 meteor build --verbose --server-only --directory /tmp/dist",
 		"coverage": "TS_NODE_COMPILER_OPTIONS='{\"module\": \"commonjs\"}' nyc -r html mocha --config ./.mocharc.js",
 		"debug": "meteor run --inspect",