fix(ci): use explicit path for frontend lockfile

Author: opencode

.github/workflows/ci.yml

@@ -75,7 +75,7 @@ jobs:
         with:
           node-version: "22"
           cache: npm
-          cache-dependency-path: "**/package-lock.json"
+          cache-dependency-path: frontend/package-lock.json
 
       - name: Install dependencies
         run: npm ci