Edit recipe - overhaul UX

[MadeInPierre]

When editing a recipe, the UX is confusing for newcomers:

• Try to automatically fix things the LLM might still let through: title too long, missing values, empty quantities
• No recipe image => bad looking meal card, add a placeholder
• Clear validation error messages on top of the page and next to the field, console.warn instead of console.error
• Ingredients section is bad, see below.

The ingredients UI should be remade:

• Type to add an ingredient, then the ingredient name is read-only
• Grid of ingredients with only amount/unit customizable
• Drag to set optional if possible? Otherwise keep button and document