chore(pre-commit): add unit test hooks for backend and frontend

- Add test-backend hook to run Vitest for backend TypeScript files
- Add test-frontend hook to run Vitest for frontend TypeScript files with no-test pass-through
- Configure hooks to trigger on TypeScript file changes in respective directories
- Ensure unit tests run automatically during pre-commit phase for code quality

Author: alvagante

.pre-commit-config.yaml

@@ -61,6 +61,22 @@ repos:
         files: ^frontend/
         pass_filenames: false
 
+      - id: test-backend
+        name: Unit Tests (Backend)
+        entry: bash -c 'cd backend && npx vitest --run'
+        language: system
+        types_or: [ts, tsx]
+        files: ^backend/
+        pass_filenames: false
+
+      - id: test-frontend
+        name: Unit Tests (Frontend)
+        entry: bash -c 'cd frontend && npx vitest --run --passWithNoTests'
+        language: system
+        types_or: [ts, tsx]
+        files: ^frontend/
+        pass_filenames: false
+
   # Prevent duplicate/backup files
   - repo: local
     hooks: