feat: Set up SessionMiddleware and Jinja2 Template Configuration

- Add SECRET_KEY environment variable and .env file for session management
- Configure SessionMiddleware with FastAPI for user session handling
- Set up Jinja2 template engine with template directory configuration
- Mount static files directory for CSS, JS, and image assets
- Create comprehensive base.html template with Bootstrap 5 CDN
- Add Bootstrap Icons and custom styling support
- Include responsive navigation with user authentication state
- Create placeholder CSS and JavaScript files for customization
- Add aiofiles dependency for static file serving

This establishes the web framework foundation with session management
and templating system ready for frontend development.

static/js/custom.js

@@ -0,0 +1,82 @@
+// Custom JavaScript for Delphi Database
+
+document.addEventListener('DOMContentLoaded', function() {
+    // Initialize tooltips if any
+    var tooltipTriggerList = [].slice.call(document.querySelectorAll('[data-bs-toggle="tooltip"]'));
+    var tooltipList = tooltipTriggerList.map(function (tooltipTriggerEl) {
+        return new bootstrap.Tooltip(tooltipTriggerEl);
+    });
+
+    // Auto-hide alerts after 5 seconds
+    var alerts = document.querySelectorAll('.alert:not(.alert-permanent)');
+    alerts.forEach(function(alert) {
+        setTimeout(function() {
+            var bsAlert = new bootstrap.Alert(alert);
+            bsAlert.close();
+        }, 5000);
+    });
+
+    // Confirm delete actions
+    var deleteButtons = document.querySelectorAll('[data-confirm-delete]');
+    deleteButtons.forEach(function(button) {
+        button.addEventListener('click', function(e) {
+            var message = this.getAttribute('data-confirm-delete') || 'Are you sure you want to delete this item?';
+            if (!confirm(message)) {
+                e.preventDefault();
+            }
+        });
+    });
+
+    // Form validation enhancement
+    var forms = document.querySelectorAll('.needs-validation');
+    Array.prototype.slice.call(forms).forEach(function(form) {
+        form.addEventListener('submit', function(event) {
+            if (!form.checkValidity()) {
+                event.preventDefault();
+                event.stopPropagation();
+            }
+            form.classList.add('was-validated');
+        }, false);
+    });
+
+    // Dynamic form field enabling/disabling
+    var toggleFields = document.querySelectorAll('[data-toggle-field]');
+    toggleFields.forEach(function(element) {
+        element.addEventListener('change', function() {
+            var targetSelector = this.getAttribute('data-toggle-field');
+            var targetField = document.querySelector(targetSelector);
+            if (targetField) {
+                targetField.disabled = !this.checked;
+            }
+        });
+    });
+});
+
+// Utility functions
+function formatDate(dateString) {
+    if (!dateString) return '';
+    var date = new Date(dateString);
+    return date.toLocaleDateString();
+}
+
+function formatCurrency(amount) {
+    if (!amount) return '$0.00';
+    return new Intl.NumberFormat('en-US', {
+        style: 'currency',
+        currency: 'USD'
+    }).format(amount);
+}
+
+function showLoading(button) {
+    if (button) {
+        button.disabled = true;
+        button.innerHTML = '<span class="spinner-border spinner-border-sm me-2"></span>Loading...';
+    }
+}
+
+function hideLoading(button, originalText) {
+    if (button) {
+        button.disabled = false;
+        button.innerHTML = originalText;
+    }
+}