Recipe Management System

Process an ordered sequence of recipe and user operations. Recipe IDs are assigned monotonically as recipe1, recipe2, and so on, and deleted IDs are never reused.

Each operation is a string array with one of these forms:

• ["ADD_RECIPE", name, ingredientsCsv, stepsCsv] adds a recipe when no existing recipe has the same name case-insensitively. It returns [recipeId], or an empty list on a name conflict.
• ["GET_RECIPE", recipeId] returns [name, ingredientsCsv, stepsCsv], or an empty list when the ID is missing.
• ["UPDATE_RECIPE", recipeId, name, ingredientsCsv, stepsCsv] replaces all recipe fields. It returns ["true"] on success and ["false"] for a missing ID or case-insensitive name conflict.
• ["DELETE_RECIPE", recipeId] removes the recipe and returns a lowercase boolean string.
• ["SEARCH_INGREDIENT", ingredient] returns IDs of recipes containing an exact case-insensitive ingredient. Order them by ingredient count ascending, then numeric recipe ID ascending.
• ["LIST_RECIPES", sortBy] returns every recipe ID. For ingredient_count, sort by ingredient count ascending and then numeric ID. Otherwise, including an unsupported value, sort by case-insensitive name ascending and then numeric ID.
• ["ADD_USER", username] returns ["true"] after adding a new case-sensitive username and ["false"] for a duplicate.
• ["EDIT_RECIPE", username, recipeId, name, ingredientsCsv, stepsCsv] lets any existing user replace an existing recipe, subject to the same name rule, and returns a lowercase boolean string.

Return one string-list result for every operation in input order.