feat(feedback): Fehler-melden-Dialog + ID-kopieren (Stammbaum/Akte/Wurf)

Rechtsklick auf eine Maus im Stammbaum öffnet ein Kontextmenü mit „ID kopieren"
(Clipboard + Toast) und „Fehler melden". Zusätzlich „Fehler melden"-Buttons in
der Rennmausakte und der Wurf-Ansicht. Der Dialog erfasst eine Beschreibung und
sendet sie samt Debug-Kontext (Ansicht, Tier-/Wurf-ID + Name, URL, Zeitstempel,
User-Agent) an POST /feedback; gespeichert in einer neuen Feedback-Tabelle.

Backend: Feedback-Entity (lose nullable GerbilId/LitterId ohne FK), Endpoints
POST/GET /feedback, EF-Migration AddFeedback. Die Tabelle wird vom Import-Ingest
NICHT geleert — Feedback überlebt Re-Ingests (Test deckt das ab).

Tests: FeedbackEndpointTests (persistiert, 400 bei leer, übersteht Ingest-Wipe);
e2e feedback.spec.ts. tsc/eslint/vitest(129)/playwright(6)/dotnet(212) grün.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

GerbilManagerWebAPI/ApplicationContext.cs

@@ -24,6 +24,7 @@ public class ApplicationContext : DbContext
     public DbSet<Media> Media => Set<Media>();
     public DbSet<Request> Requests => Set<Request>();
     public DbSet<MailSettings> MailSettings => Set<MailSettings>();
+    public DbSet<Feedback> Feedback => Set<Feedback>();
 
     // Keep Gerbil.NameSearch in sync on every save (separator-insensitive search key),
     // so it can never drift from Name regardless of which code path mutates the entity.
@@ -202,6 +203,15 @@ public class ApplicationContext : DbContext
         modelBuilder.Entity<MailSettings>()
             .HasData(new MailSettings { Id = GerbilManagerWebAPI.Models.MailSettings.SingletonId });
 
+        // FEEDBACK: deliberately relationship-free. GerbilId/LitterId are plain nullable
+        // Guid columns (no navigation properties → EF creates NO foreign key), so the
+        // import re-ingest wipe of Gerbils/Litters never cascades into — or breaks —
+        // feedback rows. They survive re-ingest, which is the whole point.
+        modelBuilder.Entity<Feedback>(e =>
+        {
+            e.HasIndex(f => f.CreatedAt);
+        });
+
         // DB-4: German collation on remaining searched/sorted text columns (Npgsql-only).
         if (isNpgsql)
         {

GerbilManagerWebAPI/Dtos/FeedbackDtos.cs

@@ -0,0 +1,25 @@
+namespace GerbilManagerWebAPI.Dtos
+{
+    /// <summary>FEEDBACK: payload for POST /feedback (the "Fehler melden" dialog).</summary>
+    public record FeedbackInput(
+        string Message,
+        string Context,
+        Guid? GerbilId,
+        Guid? LitterId,
+        string? EntityName,
+        string? Url,
+        DateTimeOffset? ClientTimestamp);
+
+    /// <summary>FEEDBACK: response DTO for a stored report.</summary>
+    public record FeedbackDto(
+        Guid Id,
+        string Message,
+        string Context,
+        Guid? GerbilId,
+        Guid? LitterId,
+        string? EntityName,
+        string? Url,
+        DateTimeOffset? ClientTimestamp,
+        string? UserAgent,
+        DateTimeOffset CreatedAt);
+}

GerbilManagerWebAPI/Endpoints/FeedbackEndpoints.cs

@@ -0,0 +1,62 @@
+using GerbilManagerWebAPI.Dtos;
+using GerbilManagerWebAPI.Models;
+using Microsoft.AspNetCore.Http.HttpResults;
+using Microsoft.EntityFrameworkCore;
+
+namespace GerbilManagerWebAPI.Endpoints
+{
+    /// <summary>
+    /// FEEDBACK: the "Fehler melden" report sink.
+    ///   POST /feedback  -> persist a user bug report (with captured debug context), returns 201.
+    ///   GET  /feedback  -> list reports, newest first (for later review).
+    /// Feedback is decoupled from gerbils/litters (loose nullable Guid columns, no FK), so
+    /// rows survive the import re-ingest wipe.
+    /// </summary>
+    public static class FeedbackEndpoints
+    {
+        public static IEndpointRouteBuilder MapFeedbackEndpoints(this IEndpointRouteBuilder app)
+        {
+            var group = app.MapGroup("/feedback").WithTags("Feedback");
+
+            group.MapPost("/", async Task<Results<Created<FeedbackDto>, BadRequest<string>>> (
+                FeedbackInput input, ApplicationContext db, HttpContext http) =>
+            {
+                if (string.IsNullOrWhiteSpace(input.Message))
+                    return TypedResults.BadRequest("Message darf nicht leer sein.");
+
+                var entity = new Feedback
+                {
+                    Id = Guid.NewGuid(),
+                    Message = input.Message.Trim(),
+                    Context = string.IsNullOrWhiteSpace(input.Context) ? "unknown" : input.Context.Trim(),
+                    GerbilId = input.GerbilId,
+                    LitterId = input.LitterId,
+                    EntityName = input.EntityName,
+                    Url = input.Url,
+                    ClientTimestamp = input.ClientTimestamp,
+                    UserAgent = http.Request.Headers.UserAgent.ToString() is { Length: > 0 } ua ? ua : null,
+                    CreatedAt = DateTimeOffset.UtcNow,
+                };
+                db.Feedback.Add(entity);
+                await db.SaveChangesAsync();
+                return TypedResults.Created($"/feedback/{entity.Id}", ToDto(entity));
+            });
+
+            group.MapGet("/", async (ApplicationContext db) =>
+            {
+                // Order in memory: SQLite (test host) cannot ORDER BY a DateTimeOffset column.
+                var rows = await db.Feedback.AsNoTracking().ToListAsync();
+                return TypedResults.Ok(rows
+                    .OrderByDescending(f => f.CreatedAt)
+                    .Select(ToDto)
+                    .ToList());
+            });
+
+            return app;
+        }
+
+        private static FeedbackDto ToDto(Feedback f) =>
+            new(f.Id, f.Message, f.Context, f.GerbilId, f.LitterId, f.EntityName, f.Url,
+                f.ClientTimestamp, f.UserAgent, f.CreatedAt);
+    }
+}

GerbilManagerWebAPI/Migrations/20260622131928_AddFeedback.cs

@@ -0,0 +1,47 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddFeedback : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Feedback",
+                columns: table => new
+                {
+                    Id = table.Column<Guid>(type: "uuid", nullable: false),
+                    Message = table.Column<string>(type: "text", nullable: false),
+                    Context = table.Column<string>(type: "text", nullable: false),
+                    GerbilId = table.Column<Guid>(type: "uuid", nullable: true),
+                    LitterId = table.Column<Guid>(type: "uuid", nullable: true),
+                    EntityName = table.Column<string>(type: "text", nullable: true),
+                    Url = table.Column<string>(type: "text", nullable: true),
+                    ClientTimestamp = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: true),
+                    UserAgent = table.Column<string>(type: "text", nullable: true),
+                    CreatedAt = table.Column<DateTimeOffset>(type: "timestamp with time zone", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Feedback", x => x.Id);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Feedback_CreatedAt",
+                table: "Feedback",
+                column: "CreatedAt");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Feedback");
+        }
+    }
+}

GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs

@@ -793,6 +793,48 @@ namespace GerbilManagerWebAPI.Migrations
                     b.ToTable("EnclosurePhotos");
                 });
 
+            modelBuilder.Entity("GerbilManagerWebAPI.Models.Feedback", b =>
+                {
+                    b.Property<Guid>("Id")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("uuid");
+
+                    b.Property<DateTimeOffset?>("ClientTimestamp")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("Context")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<DateTimeOffset>("CreatedAt")
+                        .HasColumnType("timestamp with time zone");
+
+                    b.Property<string>("EntityName")
+                        .HasColumnType("text");
+
+                    b.Property<Guid?>("GerbilId")
+                        .HasColumnType("uuid");
+
+                    b.Property<Guid?>("LitterId")
+                        .HasColumnType("uuid");
+
+                    b.Property<string>("Message")
+                        .IsRequired()
+                        .HasColumnType("text");
+
+                    b.Property<string>("Url")
+                        .HasColumnType("text");
+
+                    b.Property<string>("UserAgent")
+                        .HasColumnType("text");
+
+                    b.HasKey("Id");
+
+                    b.HasIndex("CreatedAt");
+
+                    b.ToTable("Feedback");
+                });
+
             modelBuilder.Entity("GerbilManagerWebAPI.Models.Gerbil", b =>
                 {
                     b.Property<Guid>("Id")

GerbilManagerWebAPI/Models/Feedback.cs

@@ -0,0 +1,44 @@
+using System.ComponentModel.DataAnnotations;
+
+namespace GerbilManagerWebAPI.Models
+{
+    /// <summary>
+    /// FEEDBACK: a user-submitted "Fehler melden" report. Decoupled from the rest of the
+    /// model on purpose — GerbilId/LitterId are plain nullable Guid columns (NOT enforced
+    /// foreign keys), so the import re-ingest wipe (IngestResolvedService) can delete
+    /// gerbils/litters without deleting or breaking feedback rows. The captured EntityName
+    /// keeps the report human-readable even after the referenced animal is gone.
+    /// </summary>
+    public class Feedback
+    {
+        [Key]
+        public Guid Id { get; set; }
+
+        /// <summary>The user's free-text description of the problem.</summary>
+        public required string Message { get; set; }
+
+        /// <summary>Which view the report came from: stammbaum | gerbil-detail | litter-detail.</summary>
+        public required string Context { get; set; }
+
+        /// <summary>Loose reference (no FK) to the gerbil the report is about, if any.</summary>
+        public Guid? GerbilId { get; set; }
+
+        /// <summary>Loose reference (no FK) to the litter the report is about, if any.</summary>
+        public Guid? LitterId { get; set; }
+
+        /// <summary>Captured name of the referenced animal/litter (survives an ingest wipe).</summary>
+        public string? EntityName { get; set; }
+
+        /// <summary>The client URL/route the report was filed from.</summary>
+        public string? Url { get; set; }
+
+        /// <summary>Client-supplied timestamp (when the user submitted, in their browser).</summary>
+        public DateTimeOffset? ClientTimestamp { get; set; }
+
+        /// <summary>Optional browser user-agent for diagnostics.</summary>
+        public string? UserAgent { get; set; }
+
+        /// <summary>Server-side creation time.</summary>
+        public DateTimeOffset CreatedAt { get; set; }
+    }
+}

GerbilManagerWebAPI/Program.cs

@@ -126,6 +126,7 @@ app.MapExportEndpoints();
 app.MapCmsEndpoints();
 app.MapRequestEndpoints();
 app.MapNamesEndpoints();
+app.MapFeedbackEndpoints();
 
 app.Run();