fix: resolve CI failures — npm ci lockfile + TypeScript lint errors

- Root cause: workspace config in root package.json caused npm ci in
  src/typescript/ to look for root lockfile (which was gitignored)
- Track root package-lock.json and run npm ci from root in all workflows
- Fix TypeScript lint: add missing Middleware/MiddlewareStack imports
  in src/index.ts convenience layer
- Update .gitignore to allow root package-lock.json
- All 1,893 tests pass (1,180 Python + 713 TypeScript)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: apartsin

.github/workflows/coverage.yml

@@ -42,7 +42,7 @@ jobs:
         with:
           node-version: "20"
       - name: Install dependencies
-        run: cd src/typescript && npm ci
+        run: npm ci
       - name: Run tests with coverage
         run: cd src/typescript && npx jest --coverage --coverageReporters=text --coverageReporters=cobertura
       - name: Upload TypeScript coverage

.github/workflows/publish-npm.yml

@@ -27,9 +27,8 @@ jobs:
 
       - name: Install and build
         run: |
-          cd src/typescript
           npm ci
-          npm run build
+          cd src/typescript && npm run build
 
       - name: Run tests
         run: cd src/typescript && npm test

.github/workflows/publish.yml

@@ -54,7 +54,6 @@ jobs:
           node-version: "20"
           registry-url: "https://registry.npmjs.org"
       - name: Install dependencies
-        working-directory: src/typescript
         run: npm ci
       - name: Build
         working-directory: src/typescript

.github/workflows/release.yml

@@ -46,8 +46,8 @@ jobs:
 
       - name: Build TypeScript package
         run: |
-          cd src/typescript
           npm ci
+          cd src/typescript
           npm run build
           npm pack
 

.github/workflows/tests.yml

@@ -22,7 +22,7 @@ jobs:
       - name: Python type check (mypy)
         run: pip install mypy && cd src/python && mypy modelmesh --ignore-missing-imports --no-error-summary || true
       - name: TypeScript lint (tsc --noEmit)
-        run: cd src/typescript && npm ci && npm run lint
+        run: npm ci && npm run --workspace src/typescript lint
       - name: Version consistency check
         run: |
           PY_VER=$(grep '^version' src/python/pyproject.toml | head -1 | sed 's/.*"\(.*\)"/\1/')
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node-version }}
-      - run: cd src/typescript && npm ci && npm test
+      - run: npm ci && npm test --workspace src/typescript
 
   docker:
     name: Docker Build

.gitignore

@@ -35,7 +35,8 @@ Thumbs.db
 # Node.js
 node_modules/
 *.tgz
-package-lock.json
+**/node_modules/**/package-lock.json
+!/package-lock.json
 !/src/typescript/package-lock.json
 
 # Test output