feat(landing): implement dynamic version and release date display

.github/workflows/release.yml

@@ -59,6 +59,7 @@ jobs:
       - name: Inject version into source files
         run: |
           VERSION=${{ steps.version.outputs.VERSION }}
+          DATE=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
           echo "Injecting version $VERSION from tag $GITHUB_REF_NAME..."
 
           # 1. extension/manifest.base.json
@@ -73,8 +74,22 @@ jobs:
           jq --arg v "$VERSION" '.version = $v' package.json > tmp.json && mv tmp.json package.json
           echo "  ✓ package.json -> $VERSION"
 
+          # 4. website/version.json
+          jq -n --arg v "$VERSION" --arg d "$DATE" '{version: $v, date: $d}' > website/version.json
+          echo "  ✓ website/version.json -> version $VERSION, date $DATE"
+
           echo "Version injection complete."
 
+      - name: Commit and push version updates back to main
+        run: |
+          git config --local user.email "action@github.com"
+          git config --local user.name "GitHub Action"
+          git add extension/manifest.base.json shared/constants.js package.json website/version.json
+          git commit -m "chore(release): update versions to $GITHUB_REF_NAME [skip ci]" || echo "No changes to commit"
+          git push origin HEAD:main
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Build Extensions
         run: |
           npm install