SEARCH-1: separator-insensitive NameSearch + OriginBreeder (Herkunft) filter

- Gerbil.NameSearch (lowercase, strip whitespace/.-_) auto-synced in ApplicationContext
  .SaveChanges; Gridify-filterable so 'clan kleine chaoten' matches 'Clan-Kleine-Chaoten'
  (client strips separators the same way). GerbilSearch.Normalize shared helper.
- Gerbil.OriginBreeder (free-text Herkunft) on DTO+Input, set by the FEAT-8 import from the
  source Zucht (imported animals have no OriginContact). Gridify-filterable.
- GET /gerbils/breeders: distinct non-empty OriginBreeder values for the Herkunft dropdown.
- Migration AddSearchFields (+ NameSearch backfill SQL for existing rows).

GerbilManagerWebAPI/ApplicationContext.cs

@@ -18,6 +18,29 @@ public class ApplicationContext : DbContext
     public DbSet<SaleContract> SaleContracts => Set<SaleContract>();
     public DbSet<BreederSettings> BreederSettings => Set<BreederSettings>();
 
+    // 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.
+    public override int SaveChanges(bool acceptAllChangesOnSuccess)
+    {
+        SyncNameSearch();
+        return base.SaveChanges(acceptAllChangesOnSuccess);
+    }
+
+    public override Task<int> SaveChangesAsync(bool acceptAllChangesOnSuccess, CancellationToken cancellationToken = default)
+    {
+        SyncNameSearch();
+        return base.SaveChangesAsync(acceptAllChangesOnSuccess, cancellationToken);
+    }
+
+    private void SyncNameSearch()
+    {
+        foreach (var entry in ChangeTracker.Entries<Gerbil>())
+        {
+            if (entry.State is EntityState.Added or EntityState.Modified)
+                entry.Entity.NameSearch = GerbilSearch.Normalize(entry.Entity.Name);
+        }
+    }
+
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         modelBuilder.Entity<Gerbil>(e =>

GerbilManagerWebAPI/Dtos/ApiDtos.cs

@@ -24,7 +24,8 @@ namespace GerbilManagerWebAPI.Dtos
         string? Genotype,
         string? Notes,
         string? ImportSource,
-        string? ExternalRef);
+        string? ExternalRef,
+        string? OriginBreeder);
 
     public record LitterDto(
         Guid Id,
@@ -69,7 +70,8 @@ namespace GerbilManagerWebAPI.Dtos
         string? Genotype,
         string? Notes,
         string? ImportSource,
-        string? ExternalRef);
+        string? ExternalRef,
+        string? OriginBreeder);
 
     public record LitterInput(
         string Name,

GerbilManagerWebAPI/Endpoints/GerbilEndpoints.cs

@@ -19,6 +19,13 @@ namespace GerbilManagerWebAPI.Endpoints
                 TypedResults.Ok(await db.Gerbils.AsNoTracking()
                     .ToPagedResultAsync(query, ToDto)));
 
+            // GET /gerbils/breeders — distinct non-empty Herkunft values for the Tiere filter dropdown
+            group.MapGet("/breeders", async (ApplicationContext db) =>
+                TypedResults.Ok(await db.Gerbils.AsNoTracking()
+                    .Where(g => g.OriginBreeder != null && g.OriginBreeder != "")
+                    .Select(g => g.OriginBreeder!)
+                    .Distinct().OrderBy(b => b).ToListAsync()));
+
             // GET /gerbils/{id}
             group.MapGet("/{id:guid}", async Task<Results<Ok<GerbilDto>, NotFound>> (Guid id, ApplicationContext db) =>
             {
@@ -87,11 +94,12 @@ namespace GerbilManagerWebAPI.Endpoints
             g.Notes = i.Notes;
             g.ImportSource = i.ImportSource;
             g.ExternalRef = i.ExternalRef;
+            g.OriginBreeder = i.OriginBreeder;
         }
 
         internal static GerbilDto ToDto(Gerbil g) => new(
             g.Id, g.Name, g.Gender, g.Status, g.LitterId, g.OriginContactId, g.ReceiverContactId,
             g.EnclosureId, g.ColorVarietyId, g.DateOfBirth, g.DateOfDeath, g.CauseOfDeath,
-            g.GoHomeDate, g.Genotype, g.Notes, g.ImportSource, g.ExternalRef);
+            g.GoHomeDate, g.Genotype, g.Notes, g.ImportSource, g.ExternalRef, g.OriginBreeder);
     }
 }

GerbilManagerWebAPI/Import/ImportService.cs

@@ -176,6 +176,7 @@ namespace GerbilManagerWebAPI.Import
                         Genotype = ComposeGenotype(a.Genotype),
                         ImportSource = ImportSourceTag,
                         ExternalRef = a.Id,
+                        OriginBreeder = string.IsNullOrWhiteSpace(a.Zucht) ? null : a.Zucht.Trim(),
                         RawImportData = JsonSerializer.Serialize(new
                         {
                             a.Genotype.RawGenotype,

GerbilManagerWebAPI/Migrations/20260606070015_AddSearchFields.cs

@@ -0,0 +1,44 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace GerbilManagerWebAPI.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddSearchFields : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<string>(
+                name: "NameSearch",
+                table: "Gerbils",
+                type: "text",
+                nullable: true);
+
+            migrationBuilder.AddColumn<string>(
+                name: "OriginBreeder",
+                table: "Gerbils",
+                type: "text",
+                nullable: true);
+
+            // Backfill NameSearch for existing rows (lowercase, strip whitespace/.-_),
+            // matching GerbilSearch.Normalize. New/updated rows stay in sync via
+            // ApplicationContext.SaveChanges.
+            migrationBuilder.Sql(
+                "UPDATE \"Gerbils\" SET \"NameSearch\" = lower(regexp_replace(\"Name\", '[[:space:]._-]', '', 'g'));");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "NameSearch",
+                table: "Gerbils");
+
+            migrationBuilder.DropColumn(
+                name: "OriginBreeder",
+                table: "Gerbils");
+        }
+    }
+}

GerbilManagerWebAPI/Migrations/ApplicationContextModelSnapshot.cs

@@ -696,9 +696,15 @@ namespace GerbilManagerWebAPI.Migrations
                         .IsRequired()
                         .HasColumnType("text");
 
+                    b.Property<string>("NameSearch")
+                        .HasColumnType("text");
+
                     b.Property<string>("Notes")
                         .HasColumnType("text");
 
+                    b.Property<string>("OriginBreeder")
+                        .HasColumnType("text");
+
                     b.Property<Guid?>("OriginContactId")
                         .HasColumnType("uuid");
 

GerbilManagerWebAPI/Models/Gerbil.cs

@@ -50,5 +50,27 @@ namespace GerbilManagerWebAPI.Models
         /// <summary>Raw import payload preserved verbatim (rawGenotype + unmappedTokens like
         /// the Uw locus / WFNZ markers) so nothing from the spreadsheets is lost. JSON text.</summary>
         public string? RawImportData { get; set; }
+
+        /// <summary>Breeder/Herkunft (cattery/Zucht) as free text — set by the FEAT-8 import from
+        /// the source Zucht (imported animals have no OriginContact). Gridify-filterable; the
+        /// distinct values back the Tiere "Herkunft" dropdown (GET /gerbils/breeders).</summary>
+        public string? OriginBreeder { get; set; }
+
+        /// <summary>Separator-insensitive search key: Name lowercased with whitespace/.-_ stripped.
+        /// Kept in sync automatically on save (see ApplicationContext.SaveChanges). Gridify-filterable
+        /// so "clan kleine chaoten" matches "Clan-Kleine-Chaoten" (client strips separators too).</summary>
+        public string? NameSearch { get; set; }
+    }
+
+    /// <summary>Shared normalisation for the separator-insensitive name search.</summary>
+    public static class GerbilSearch
+    {
+        public static string Normalize(string? name)
+        {
+            if (string.IsNullOrEmpty(name)) return "";
+            var chars = name.ToLowerInvariant()
+                .Where(c => !char.IsWhiteSpace(c) && c != '-' && c != '.' && c != '_');
+            return new string(chars.ToArray());
+        }
     }
 }