Implement boxes management module with auto-numbered box creation

- Add boxes_crates database table with BIGINT IDs and 8-digit auto-numbered box_numbers
- Implement boxes CRUD operations (add, edit, update, delete, delete_multiple)
- Create boxes route handlers with POST actions for all operations
- Add boxes.html template with 3-panel layout matching warehouse locations module
- Implement barcode generation and printing with JsBarcode and QZ Tray integration
- Add browser print fallback for when QZ Tray is not available
- Simplify create box form to single button with auto-generation
- Fix JavaScript null reference errors with proper element validation
- Convert tuple data to dictionaries for Jinja2 template compatibility
- Register boxes blueprint in Flask app initialization

app/routes.py

@@ -77,6 +77,13 @@ def dashboard():
             'color': 'primary',
             'url': url_for('quality.quality_index')
         },
+        {
+            'name': 'Warehouse Module',
+            'description': 'Manage warehouse operations and inventory',
+            'icon': 'fa-warehouse',
+            'color': 'info',
+            'url': url_for('warehouse.warehouse_index')
+        },
         {
             'name': 'Settings',
             'description': 'Configure application settings',