fix: exclude e2e tests from CI vitest run

Playwright e2e tests need a browser and can't run in the CI container.
Exclude e2e/ directory from vitest so only unit tests run.

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

.gitea/workflows/publish.yml

@@ -17,7 +17,7 @@ jobs:
         run: npm ci
 
       - name: Run tests
-        run: npx vitest run
+        run: npx vitest run --exclude 'e2e/**'
 
       - name: Build library
         run: npm run build:lib