chore: update GitHub workflows for consistency and clarity

- Standardized quotes in YAML files for better readability.
- Adjusted cache-dependency-path to point to the correct location.
- Removed unnecessary working-directory specifications to simplify the workflow.

.github/workflows/pr-check.yml

@@ -22,12 +22,10 @@ jobs:
         with:
           node-version: "20"
           cache: "npm"
-          cache-dependency-path: app/package-lock.json
+          cache-dependency-path: package-lock.json
 
       - name: Install dependencies
-        working-directory: ./app
         run: npm ci
 
       - name: Run build:electron
-        working-directory: ./app
         run: npm run build:electron