Initial commit

MealPlan.Api/Models/ApplicationUser.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// Maps to the existing ASP.NET Core Identity "AspNetUsers" table.
+/// Only the columns described in the schema are mapped. Password verification uses
+/// ASP.NET Core Identity's <see cref="Microsoft.AspNetCore.Identity.IPasswordHasher{TUser}"/>,
+/// so no additional Identity tables are required for this read-only login flow.
+/// </summary>
+[Table("AspNetUsers")]
+public class ApplicationUser
+{
+    [Column("Id")]
+    public Guid Id { get; set; }
+
+    [Column("UserName")]
+    public string? UserName { get; set; }
+
+    [Column("Email")]
+    public string? Email { get; set; }
+
+    [Column("PasswordHash")]
+    public string? PasswordHash { get; set; }
+
+    [Column("CreatedAt")]
+    public DateTime CreatedAt { get; set; }
+
+    [Column("IsActive")]
+    public bool IsActive { get; set; }
+}

MealPlan.Api/Models/Ingredient.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// Maps to the existing "Ingredients" table.
+/// </summary>
+[Table("Ingredients")]
+public class Ingredient
+{
+    [Column("Id")]
+    public int Id { get; set; }
+
+    [Column("RecipeId")]
+    public int RecipeId { get; set; }
+
+    [Column("Name")]
+    [MaxLength(255)]
+    public string Name { get; set; } = string.Empty;
+
+    [Column("AmountGrams")]
+    public decimal? AmountGrams { get; set; }
+
+    [Column("Unit")]
+    [MaxLength(50)]
+    public string? Unit { get; set; }
+
+    [Column("SortOrder")]
+    public int SortOrder { get; set; }
+
+    public Recipe? Recipe { get; set; }
+}

MealPlan.Api/Models/MealCategory.cs

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+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// Meal categories. Integer values map directly to the "MealCategory" column on "Recipes".
+/// </summary>
+public enum MealCategory
+{
+    Breakfast = 0,
+    SecondBreakfast = 1,
+    Lunch = 2,
+    Dinner = 3
+}

MealPlan.Api/Models/Recipe.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// Maps to the existing "Recipes" table. Database-first; no migrations manage this table.
+/// </summary>
+[Table("Recipes")]
+public class Recipe
+{
+    [Column("Id")]
+    public int Id { get; set; }
+
+    [Column("Name")]
+    [MaxLength(255)]
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>Stored as INT in the DB (0..3). Mapped to the <see cref="MealCategory"/> enum.</summary>
+    [Column("MealCategory")]
+    public int MealCategory { get; set; }
+
+    [Column("Calories")]
+    public int? Calories { get; set; }
+
+    [Column("Protein")]
+    public decimal? Protein { get; set; }
+
+    [Column("Fat")]
+    public decimal? Fat { get; set; }
+
+    [Column("Carbs")]
+    public decimal? Carbs { get; set; }
+
+    [Column("PrepTimeMinutes")]
+    public int? PrepTimeMinutes { get; set; }
+
+    [Column("CreatedAt")]
+    public DateTime CreatedAt { get; set; }
+
+    [Column("UpdatedAt")]
+    public DateTime? UpdatedAt { get; set; }
+
+    [Column("IsActive")]
+    public bool IsActive { get; set; }
+
+    public ICollection<Ingredient> Ingredients { get; set; } = new List<Ingredient>();
+    public ICollection<RecipeStep> Steps { get; set; } = new List<RecipeStep>();
+}

MealPlan.Api/Models/RecipeStep.cs

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+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// Maps to the existing "RecipeSteps" table.
+/// </summary>
+[Table("RecipeSteps")]
+public class RecipeStep
+{
+    [Column("Id")]
+    public int Id { get; set; }
+
+    [Column("RecipeId")]
+    public int RecipeId { get; set; }
+
+    [Column("StepNumber")]
+    public int StepNumber { get; set; }
+
+    [Column("Description")]
+    public string Description { get; set; } = string.Empty;
+
+    public Recipe? Recipe { get; set; }
+}

MealPlan.Api/Models/RefreshToken.cs

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+namespace MealPlan.Api.Models;
+
+/// <summary>
+/// In-memory refresh token record. Stored in a singleton store rather than the database,
+/// because the existing schema must not be modified and no migrations may be created.
+/// Rotation: every successful refresh invalidates the previous token and issues a new one.
+/// </summary>
+public class RefreshToken
+{
+    public string Token { get; set; } = string.Empty;
+    public string UserId { get; set; } = string.Empty;
+    public DateTime ExpiresAtUtc { get; set; }
+    public DateTime CreatedAtUtc { get; set; }
+    public bool IsRevoked { get; set; }
+
+    public bool IsActive => !IsRevoked && DateTime.UtcNow < ExpiresAtUtc;
+}