Add food item management and improve barcode workflow

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.

application/admin/routes.py

@@ -1,6 +1,7 @@
-from flask import Blueprint, render_template, abort
+from flask import Blueprint, render_template, abort, redirect, url_for
 from flask_login import current_user
 from models import FoodItem
+from application import db
 
 admin_bp = Blueprint(
     "admin",
@@ -25,3 +26,12 @@ def food_items():
 @admin_bp.route("/barcode_test", methods=["GET"])
 def barcode_test():
     return render_template("barcode_test.html")
+
+
+@admin_bp.route("/delete_food/<int:id>", methods=["POST"])
+def delete_food(id):
+    item = FoodItem.query.get(id)
+    if item:
+        db.session.delete(item)
+        db.session.commit()
+    return redirect(url_for("admin.food_items"))