Implemented routes and forms for adding and viewing food items by barcode, including templates for displaying and entering nutritional information. Enhanced the scan workflow to redirect to food item details or entry form. Added admin ability to delete food items. Improved UI for login and scan pages. Updated FoodItem model and form fields for consistency and accuracy.
Introduces a new /scan route and template for barcode scanning using ZXing in the browser. Adds a /nutri/<barcode> API endpoint to fetch food item nutrition data by barcode. Updates the FoodItem model to include a barcode field and a to_dict method for JSON serialization. Also updates seed data to include a barcode.
