build(test): wire pnpm test to vitest, drop redundant test:vitest CI step

src/package.json:
- test: was mocha --import=tsx --recursive ...; now `vitest run` (vitest.config
  already includes tests/backend/specs, tests/backend-new/specs, and
  tests/container/specs)
- test-utils: vitest run with --testTimeout 5000
- test-container: vitest run tests/container/specs/api
- test:vitest renamed to test:watch (watch mode for local dev)

.github/workflows/backend-tests.yml:
- removed the redundant 'Run the new vitest tests' step from all 4 jobs since
  pnpm test now runs vitest itself

.github/workflows/backend-tests.yml

@@ -68,9 +68,6 @@ jobs:
       -
         name: Run the backend tests
         run: pnpm test
-      - name: Run the new vitest tests
-        working-directory: src
-        run: pnpm run test:vitest
 
   withpluginsLinux:
     env:
@@ -137,9 +134,6 @@ jobs:
       -
         name: Run the backend tests
         run: pnpm test
-      - name: Run the new vitest tests
-        working-directory: src
-        run: pnpm run test:vitest
 
   # Windows tests only run on push to develop/master, not on PRs
   withoutpluginsWindows:
@@ -189,9 +183,6 @@ jobs:
         name: Run the backend tests
         working-directory: src
         run: pnpm test
-      - name: Run the new vitest tests
-        working-directory: src
-        run: pnpm run test:vitest
 
   withpluginsWindows:
     env:
@@ -267,6 +258,3 @@ jobs:
         name: Run the backend tests
         working-directory: src
         run: pnpm test
-      - name: Run the new vitest tests
-        working-directory: src
-        run: pnpm run test:vitest

src/package.json

@@ -145,9 +145,9 @@
   },
   "scripts": {
     "lint": "eslint .",
-    "test": "cross-env NODE_ENV=production mocha --import=tsx --timeout 120000 --recursive tests/backend/specs/**.ts ../node_modules/ep_*/static/tests/backend/specs/**",
-    "test-utils": "cross-env NODE_ENV=production mocha --import=tsx --timeout 5000 --recursive tests/backend/specs/*utils.ts",
-    "test-container": "mocha --import=tsx --timeout 5000 tests/container/specs/api",
+    "test": "cross-env NODE_ENV=production vitest run",
+    "test-utils": "cross-env NODE_ENV=production vitest run tests/backend/specs --testTimeout 5000",
+    "test-container": "cross-env NODE_ENV=production vitest run tests/container/specs/api",
     "dev": "cross-env NODE_ENV=development  node --import tsx node/server.ts",
     "prod": "cross-env NODE_ENV=production node --import tsx node/server.ts",
     "ts-check": "tsc --noEmit",
@@ -157,7 +157,7 @@
     "test-admin": "cross-env NODE_ENV=production npx playwright test tests/frontend-new/admin-spec --workers 1 --project=chromium",
     "test-admin:ui": "cross-env NODE_ENV=production npx playwright test tests/frontend-new/admin-spec --ui --workers 1",
     "debug:socketio": "cross-env DEBUG=socket.io* node --import tsx node/server.ts",
-    "test:vitest": "vitest"
+    "test:watch": "cross-env NODE_ENV=production vitest"
   },
   "version": "2.7.2",
   "license": "Apache-2.0"