feat: Frontend CSS refactoring and test improvements

Frontend:
- Refactored CSS architecture with new utility classes
- Updated dashboard components styling
- Improved responsive grid system
- Enhanced typography and variables
- Updated E2E and integration tests

Added:
- Claude Code slash commands for validation
- SSH tunnel and start test scripts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

reports-app/frontend/tests/e2e/complete-reports-functionality.spec.js

@@ -1,10 +1,8 @@
 import { test, expect } from '@playwright/test';
 import { LoginPage } from '../page-objects/LoginPage.js';
-import { DashboardPage } from '../page-objects/DashboardPage.js';
 
 test.describe('📊 Complete Reports Functionality Test', () => {
   let loginPage;
-  let dashboardPage;
   let networkRequests = [];
   let apiErrors = [];
 
@@ -34,7 +32,6 @@ test.describe('📊 Complete Reports Functionality Test', () => {
     });
 
     loginPage = new LoginPage(page);
-    dashboardPage = new DashboardPage(page);
   });
 
   test('🎯 Complete User Flow: Login → Dashboard → Reports', async ({ page }) => {
@@ -293,7 +290,7 @@ test.describe('📊 Complete Reports Functionality Test', () => {
     }
   });
 
-  test.afterEach(async ({ page }) => {
+  test.afterEach(async () => {
     // Generate test report
     console.log('\n📋 === TEST REPORT ===');
     console.log(`🌐 Total Network Requests: ${networkRequests.length}`);