fix: actually stage the checks/publish split

The previous commit renamed release.yaml to ci.yml but never staged
the content edit underneath it (git mv picked up the last-staged
version, not the unstaged working-tree changes) - it pushed with the
filename changed but the workflow itself untouched. This is the
content that commit was supposed to carry.

.gitea/workflows/ci.yml

@@ -1,12 +1,12 @@
-name: Release
+name: CI
 
 on:
   push:
-    tags:
+  pull_request:
-      - "v*.*.*"
 
 jobs:
-  release:
+  checks:
+    name: Checks
     runs-on: ubuntu-latest
     steps:
       - uses: https://github.com/actions/checkout@v4
@@ -26,6 +26,24 @@ jobs:
       - run: pnpm run format:check
       - run: pnpm run test
 
+  publish:
+    name: Publish to npm registry
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: checks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: https://github.com/actions/checkout@v4
+
+      - uses: https://github.com/pnpm/action-setup@v4
+        with:
+          version: 11.21.0
+
+      - uses: https://github.com/actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - run: pnpm install --frozen-lockfile
+
       - name: Set package version from the tag
         run: npm pkg set version="${GITHUB_REF_NAME#v}"