fix(ci): use npm install instead of npm ci

The project doesn't commit package-lock.json, so npm ci fails.
Use npm install with --omit=optional to skip FFmpeg optionalDeps.

Author: pproenca

.github/workflows/ci.yml

@@ -34,7 +34,7 @@ jobs:
           node-version: 22
 
       - name: Install dependencies
-        run: npm ci --omit=optional
+        run: npm install --omit=optional
 
       - name: Lint C++
         run: npm run lint:cpp
@@ -70,7 +70,7 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: Install dependencies
-        run: npm ci --omit=optional
+        run: npm install --omit=optional
 
       - name: Build
         run: npm run build
@@ -93,7 +93,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install dependencies
-        run: npm ci --omit=optional
+        run: npm install --omit=optional
 
       - name: Build
         run: npm run build
@@ -120,7 +120,7 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: Install dependencies
-        run: npm ci --omit=optional
+        run: npm install --omit=optional
 
       - name: Build
         run: npm run build
@@ -147,7 +147,7 @@ jobs:
           node-version: ${{ matrix.node }}
 
       - name: Install dependencies
-        run: npm ci --omit=optional
+        run: npm install --omit=optional
 
       - name: Build
         run: npm run build

openspec/changes/introduce-ci-workflow/tasks.md

@@ -70,7 +70,7 @@
 ## 9. Validation
 
 - [x] 9.1 Run workflow locally with `act` to validate syntax (if available)
-- [ ] 9.2 Push to branch and verify workflow triggers on PR
+- [x] 9.2 Push to branch and verify workflow triggers on PR (https://github.com/pproenca/node-webcodecs/pull/10)
 - [ ] 9.3 Verify lint job completes in under 2 minutes
 - [ ] 9.4 Verify all matrix entries build and test successfully
 - [x] 9.5 Test `npm install` locally includes FFmpeg optional dependency