fix: apply final Copilot feedback improvements

- Update Node.js version to '20.x' for more consistent builds
- Improve TypeScript checking in pre-commit hooks to validate entire project
- Separate ESLint fixes from TypeScript checking for better performance
- Ensure cross-file type dependencies are properly validated

Author: KannuSingh

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '20.x'
 
       - name: Extract pnpm version from package.json
         id: get-pnpm-version

.lintstagedrc.json

@@ -1,4 +1,5 @@
 {
   "*.{ts,tsx,js,jsx,json,md}": ["prettier --write"],
-  "*.{ts,tsx}": ["eslint --fix", "tsc --noEmit --incremental"]
+  "*.{ts,tsx}": ["eslint --fix"],
+  "*": ["tsc --noEmit --incremental"]
 }