Adds Database Structure in C# with Entity Framework

WatchLog/Data/Database/Shared/LinkTableSharedLabel.cs

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+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(SharedListLabelId), nameof(SharedListEntityId))]
+    public class LinkTableSharedLabel
+    {
+        // --- Foreign Keys ---
+        public int SharedListLabelId { get; set; }
+
+        public int SharedListEntityId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListLabelId))]
+        public virtual SharedListLabel SharedListLabel { get; set; } = null!;
+
+        [ForeignKey(nameof(SharedListEntityId))]
+        public virtual SharedListEntity SharedListEntity { get; set; } = null!;
+    }
+}

WatchLog/Data/Database/Shared/LinkTableSharedStreamingPlatform.cs

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+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(SharedListEnityId), nameof(StreamingPlatformId))]
+    public class LinkTableSharedStreamingPlatform
+    {
+        // --- Foreign Keys ---
+        public int SharedListEnityId { get; set; }
+        public int StreamingPlatformId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListEnityId))]
+        public virtual SharedListEntity SharedListEntity { get; set; } = null!;
+
+        [ForeignKey(nameof(StreamingPlatformId))]
+        public virtual StreamingPlatform StreamingPlatform { get; set; } = null!;
+    }
+}

WatchLog/Data/Database/Shared/LinkTableSharedUser.cs

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+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(SharedListId), nameof(UserId))]
+    public class LinkTableSharedUser
+    {
+        // --- Foreign Keys ---
+        public int SharedListId { get; set; }
+        public int UserId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListId))]
+        public virtual SharedList SharedList { get; set; } = null!;
+
+        [ForeignKey(nameof(UserId))]
+        public virtual User User { get; set; } = null!;
+    }
+}

WatchLog/Data/Database/Shared/SharedList.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.ComponentModel.DataAnnotations;
+
+namespace WatchLog.Data
+{
+    public class SharedList
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [MaxLength(150)]
+        public required string Name { get; set; }
+
+        [Required]
+        public required DateTime CreationTime { get; set; }
+
+        public DateTime? LastChange { get; set; }
+
+
+        // --- Navigation Properties ---
+        public virtual ICollection<LinkTableSharedUser> SharedListUsers { get; set; } = new List<LinkTableSharedUser>();
+
+        public virtual ICollection<SharedListEntity> SharedListEntities { get; set; } = new List<SharedListEntity>();
+
+        public virtual ICollection<SharedWatchStatus> SharedWatchStatuses { get; set; } = new List<SharedWatchStatus>();
+
+        public virtual ICollection<SharedListLabel> SharedListLabels { get; set; } = new List<SharedListLabel>();
+    }
+}

WatchLog/Data/Database/Shared/SharedListEntity.cs

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+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
+
+namespace WatchLog.Data
+{
+    [PrimaryKey(nameof(SharedListId), nameof(GlobalEntityId))]
+    public class SharedListEntity
+    {
+        // --- Foreign Keys ---
+        public int SharedListId { get; set; }
+        public int GlobalEntityId { get; set; }
+
+        // --- Weiterer Foreign Key ---
+        public int? SharedWatchStatusId { get; set; }
+
+
+        // --- Datenfelder für den Listeneintrag ---
+        public bool Favorite { get; set; } = false;
+
+        [MaxLength(1000)]
+        public string? Description { get; set; }
+
+        public int? Season { get; set; }
+
+        public int? Episode { get; set; }
+
+        [Required]
+        public required DateTime CreationTime { get; set; }
+
+        public DateTime? LastChange { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListId))]
+        public virtual SharedList SharedList { get; set; } = null!;
+
+        [ForeignKey(nameof(GlobalEntityId))]
+        public virtual GlobalEntity GlobalEntity { get; set; } = null!;
+
+        [ForeignKey(nameof(SharedWatchStatusId))]
+        public virtual SharedWatchStatus? SharedWatchStatus { get; set; }
+
+        public virtual ICollection<LinkTableSharedLabel> LinkTableSharedLabels { get; set; } = new List<LinkTableSharedLabel>();
+
+        public virtual ICollection<LinkTablePrivateStreamingPlatform> LinkTablePrivateStreamingPlatforms { get; set; } = new List<LinkTablePrivateStreamingPlatform>();
+    }
+}

WatchLog/Data/Database/Shared/SharedListLabel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace WatchLog.Data
+{
+    public class SharedListLabel
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [MaxLength(50)]
+        public required string Name { get; set; }
+
+        [Required]
+        public required DateTime CreationTime { get; set; }
+
+        public DateTime? LastChange { get; set; }
+
+
+        // --- Foreign Key ---
+        [Required]
+        public int SharedListId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListId))]
+        public virtual SharedList SharedList { get; set; } = null!;
+
+        public virtual ICollection<LinkTableSharedLabel> LinkTableSharedLabels { get; set; } = new List<LinkTableSharedLabel>();
+    }
+}

WatchLog/Data/Database/Shared/SharedWatchStatus.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace WatchLog.Data
+{
+    public class SharedWatchStatus
+    {
+        [Key]
+        public int Id { get; set; }
+
+        [Required]
+        [MaxLength(50)]
+        public required string Name { get; set; }
+
+        [MaxLength(255)]
+        public string? Description { get; set; } 
+
+        [MaxLength(7)]
+        public string? ColorCode { get; set; }
+
+        [Required]
+        public required DateTime CreationTime { get; set; }
+
+        public DateTime? LastChange { get; set; }
+
+
+        // --- Foreign Key ---
+        [Required]
+        public int SharedListId { get; set; }
+
+
+        // --- Navigation Properties ---
+        [ForeignKey(nameof(SharedListId))]
+        public virtual SharedList SharedList { get; set; } = null!;
+
+        public virtual ICollection<SharedListEntity> SharedListEntities { get; set; } = new List<SharedListEntity>();
+    }
+}