feat(tickets): Volltextsuche + Kategorien, 👍/👎-Rückmeldung & ähnliche gelöste Tickets

- Suche: Volltext über Nachricht/Frage/Antwort/Changelog/Name/Kategorie, plus
  Kategorie-Filter (KI-gesetzte Kategorie als Chip + Auswahlmenü), je innerhalb der
  aktiven Ansicht.
- 👍/👎 auf gelösten Tickets: 👍 speichert die Rückmeldung, 👎 öffnet das Ticket
  wieder (zurück in die Rückfragen) und bittet um die fehlende Info.
- Melde-Fenster: schlägt beim Tippen ähnliche bereits gelöste Tickets vor
  (Wort-Überlappung + Bonus bei gleichem Tier/Wurf/Kontakt) — Self-Service.

Backend: Feedback.Category + Feedback.Helpful (+ PUT-Handling), Migration
FeedbackCategoryAndHelpful (beide nullable). Tests: 260 Backend grün, e2e Tickets
Desktop +4 (Suche/Kategorie/👍/👎), vitest 149.

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

GerbilManagerWebAPI/Dtos/FeedbackDtos.cs

@@ -47,7 +47,11 @@ namespace GerbilManagerWebAPI.Dtos
         /// <summary>When a genuinely-resolved ticket (no pending Rückfrage) was reopened; else null.</summary>
         DateTimeOffset? ReopenedAt = null,
         /// <summary>Soft-delete marker: when the ticket was deleted via the UI (recoverable); else null.</summary>
-        DateTimeOffset? DeletedAt = null);
+        DateTimeOffset? DeletedAt = null,
+        /// <summary>Optional AI-set category/topic for filtering (e.g. "Genetik", "Import"); null = none.</summary>
+        string? Category = null,
+        /// <summary>Was the resolution helpful? true=👍, false=👎, null=no feedback yet.</summary>
+        bool? Helpful = null);
 
     /// <summary>
     /// FEEDBACK: payload for PUT /feedback/{id}. Edit the message and/or toggle status,
@@ -60,5 +64,9 @@ namespace GerbilManagerWebAPI.Dtos
         string? Question,
         string? Answer,
         string? FixNote,
-        string? AgentContext);
+        string? AgentContext,
+        /// <summary>Set/clear the ticket category. Empty/whitespace clears it.</summary>
+        string? Category = null,
+        /// <summary>👍/👎 on a resolved ticket. null leaves it unchanged.</summary>
+        bool? Helpful = null);
 }

GerbilManagerWebAPI/Endpoints/FeedbackEndpoints.cs

@@ -178,6 +178,17 @@ namespace GerbilManagerWebAPI.Endpoints
                     entity.AgentContext = c.Length == 0 ? null : c;
                 }
 
+                // KATEGORIE: frei wählbares Thema für Filter/Übersicht; leer = löschen.
+                if (input.Category is not null)
+                {
+                    var cat = input.Category.Trim();
+                    entity.Category = cat.Length == 0 ? null : cat;
+                }
+
+                // HILFREICH (👍/👎): nur setzen, wenn übermittelt (null = unverändert).
+                if (input.Helpful is not null)
+                    entity.Helpful = input.Helpful;
+
                 await db.SaveChangesAsync();
                 return TypedResults.Ok(ToDto(entity));
             });
@@ -264,6 +275,6 @@ namespace GerbilManagerWebAPI.Endpoints
             new(f.Id, f.Message, f.Context, f.GerbilId, f.LitterId, f.ContactId, f.EntityName, f.Url,
                 f.ClientTimestamp, f.UserAgent, f.CreatedAt, f.Status, f.ResolvedAt,
                 f.Question, f.Answer, f.AnsweredAt, f.FixNote, f.AgentContext,
-                DeserializeThread(f.Thread), f.ReopenedAt, f.DeletedAt);
+                DeserializeThread(f.Thread), f.ReopenedAt, f.DeletedAt, f.Category, f.Helpful);
     }
 }

GerbilManagerWebAPI/Migrations/20260623091325_FeedbackCategoryAndHelpful.cs

@@ -0,0 +1,38 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    /// <inheritdoc />
+    public partial class FeedbackCategoryAndHelpful : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "Category",
+                table: "Feedback",
+                type: "text",
+                nullable: true);
+
+            migrationBuilder.AddColumn<bool>(
+                name: "Helpful",
+                table: "Feedback",
+                type: "boolean",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "Category",
+                table: "Feedback");
+
+            migrationBuilder.DropColumn(
+                name: "Helpful",
+                table: "Feedback");
+        }
+    }
+}

GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs

@@ -893,6 +893,9 @@ namespace GerbilManagerWebAPI.Migrations
                     b.Property<DateTimeOffset?>("AnsweredAt")
                         .HasColumnType("timestamp with time zone");
 
+                    b.Property<string>("Category")
+                        .HasColumnType("text");
+
                     b.Property<DateTimeOffset?>("ClientTimestamp")
                         .HasColumnType("timestamp with time zone");
 
@@ -918,6 +921,9 @@ namespace GerbilManagerWebAPI.Migrations
                     b.Property<Guid?>("GerbilId")
                         .HasColumnType("uuid");
 
+                    b.Property<bool?>("Helpful")
+                        .HasColumnType("boolean");
+
                     b.Property<Guid?>("LitterId")
                         .HasColumnType("uuid");
 

GerbilManagerWebAPI/Models/Feedback.cs

@@ -70,6 +70,18 @@ namespace GerbilManagerWebAPI.Models
         /// </summary>
         public DateTimeOffset? DeletedAt { get; set; }
 
+        /// <summary>
+        /// Optionale Kategorie/Thema (von der KI gesetzt) für Filter + Übersicht, z. B.
+        /// "Genetik", "Import", "Stammbaum", "Daten", "Foto". Frei wählbar (kein FK), null = ohne.
+        /// </summary>
+        public string? Category { get; set; }
+
+        /// <summary>
+        /// War die Lösung hilfreich? (Daumen hoch/runter auf gelösten Tickets.) true = 👍,
+        /// false = 👎 (löst i. d. R. ein Wiederöffnen aus), null = noch keine Rückmeldung.
+        /// </summary>
+        public bool? Helpful { get; set; }
+
         /// <summary>A clarifying question (Rückfrage) a maintainer attaches to the ticket; null if none.</summary>
         public string? Question { get; set; }