Refactor frontend to Composition API and improve UI/UX

Major Changes:
- Migrate components from Options API to Composition API with <script setup>
- Add centralized service layer (serviceService, deliveryService, adminService)
- Implement new reusable components (EnhancedButton, EnhancedModal, StatCard, etc.)
- Add theme store for consistent theming across application
- Improve ServiceCalendar with federal holidays and better styling
- Refactor customer profile and tank estimation components
- Update all delivery and payment pages to use centralized services
- Add utility functions for formatting and validation
- Update Dockerfiles for better environment configuration
- Enhance Tailwind config with custom design tokens

UI Improvements:
- Modern, premium design with glassmorphism effects
- Improved form layouts with FloatingInput components
- Better loading states and empty states
- Enhanced modals and tables with consistent styling
- Responsive design improvements across all pages

Technical Improvements:
- Strict TypeScript types throughout
- Better error handling and validation
- Removed deprecated api.js in favor of TypeScript services
- Improved code organization and maintainability

src/pages/employee/edit.vue

@@ -161,13 +161,12 @@
       </div>
     </div>
   </div>
-  <Footer />
+  
 </template>
 <script lang="ts">
 import { defineComponent } from 'vue'
 import axios from 'axios'
 import authHeader from '../../services/auth.header'
-import Footer from '../../layouts/footers/footer.vue'
 import useValidate from "@vuelidate/core";
 import { minLength, required } from "@vuelidate/validators";
 
@@ -179,7 +178,6 @@ interface SelectOption {
 export default defineComponent({
   name: 'EmployeeEdit',
   components: {
-    Footer,
   },
   data() {
     return {