Introduces a new route and template for an enhanced daily log dashboard with macro nutrient summary. Refactors FoodItem model to add type annotations and a macros() method, and updates form handling to default missing values to zero. Also adds a navigation link to the new dashboard in the base template.
Added a route to serve /favicon.ico using send_from_directory and included the favicon.ico file in the static directory. This improves browser tab display and branding.
