Add scene fragments to portrait prompts after clothing.

Thing, room, yard and climate precipitation can contribute a short prompt when they are in frame, with a budget so chairs stay silent.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/HSchool.Server.Tests/PortraitPromptBuilderTests.cs

@@ -109,6 +109,65 @@ public class PortraitPromptBuilderTests
         Assert.Contains("wearing a torn white shirt", positive, StringComparison.OrdinalIgnoreCase);
     }
 
+    [Fact]
+    public void Build_AppendsSceneAfterClothing()
+    {
+        var profile = SamplePreset().ToProfile(PortraitKind.Avatar);
+        var scene = new PortraitScene(
+            ["a classroom blackboard with chalk notes"],
+            [],
+            [],
+            [],
+            [new SwarmUiLoraEntry { Name = "winter-embed", Weight = 1 }],
+            []);
+        var (positive, _) = PortraitPromptBuilder.Build(SampleCard(), profile, PortraitKind.Avatar, scene: scene);
+
+        var clothesAt = positive.IndexOf("wearing a white shirt", StringComparison.OrdinalIgnoreCase);
+        var sceneAt = positive.IndexOf("a classroom blackboard with chalk notes", StringComparison.Ordinal);
+        Assert.True(clothesAt >= 0 && sceneAt > clothesAt);
+        Assert.Contains("<embed:winter-embed>", positive, StringComparison.Ordinal);
+        Assert.DoesNotContain("snow.safetensors", positive, StringComparison.Ordinal);
+    }
+
+    [Fact]
+    public void Build_DoesNotPutSceneLoraInText_ApplySceneAddsLoraParams()
+    {
+        var profile = SamplePreset().ToProfile(PortraitKind.Avatar);
+        var scene = new PortraitScene(
+            ["a winter prop"],
+            [],
+            [new SwarmUiLoraEntry { Name = "snow.safetensors", Weight = 0.7 }],
+            [],
+            [],
+            []);
+        var (positive, _) = PortraitPromptBuilder.Build(SampleCard(), profile, PortraitKind.Avatar, scene: scene);
+        var withLoras = PortraitPromptBuilder.ApplyScene(profile, scene);
+
+        Assert.Contains("a winter prop", positive, StringComparison.Ordinal);
+        Assert.DoesNotContain("snow.safetensors", positive, StringComparison.Ordinal);
+        Assert.DoesNotContain("<lora:", positive, StringComparison.Ordinal);
+        Assert.Contains(withLoras.PositiveLoras, entry => entry.Name == "snow.safetensors");
+    }
+
+    [Fact]
+    public void Build_PromptAndGenerateShareTheSameAssembly()
+    {
+        var profile = SamplePreset().ToProfile(PortraitKind.Avatar);
+        var scene = new PortraitScene(
+            ["a classroom blackboard with chalk notes"],
+            ["messy desk"],
+            [new SwarmUiLoraEntry { Name = "snow.safetensors", Weight = 0.7 }],
+            [],
+            [new SwarmUiLoraEntry { Name = "winter-embed", Weight = 1 }],
+            []);
+        var prompt = PortraitPromptBuilder.Build(SampleCard(), profile, PortraitKind.Avatar, scene: scene);
+        var generate = PortraitPromptBuilder.Build(SampleCard(), profile, PortraitKind.Avatar, scene: scene);
+
+        Assert.Equal(prompt, generate);
+        Assert.Contains("<embed:winter-embed>", prompt.Positive, StringComparison.Ordinal);
+        Assert.Contains("messy desk", prompt.Negative, StringComparison.Ordinal);
+    }
+
     private static SwarmUiPresetDefinition SamplePreset()
     {
         var preset = SwarmUiPresetDefinition.CreateDefault();