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>

src/HSchool.Content/Defs.cs

@@ -120,6 +120,9 @@ public sealed class ThingDef : Def
     /// are granted per subject instead). Apparel ignores this and fills layers.
     /// </summary>
     public float CarryChance { get; init; }
+
+    /// <summary>Portrait fragment when this thing is in the person's frame. Null or empty — silent.</summary>
+    public PromptContribution? Prompt { get; init; }
 }
 
 public sealed class PositionDef : Def;
@@ -169,6 +172,9 @@ public sealed class RoomDef : Def
     /// When set, pupil lockers in this room go to students of that sex (<c>male</c> / <c>female</c>).
     /// </summary>
     public string? LockerSex { get; init; }
+
+    /// <summary>Portrait fragment when the person is in a room of this def. Null or empty — silent.</summary>
+    public PromptContribution? Prompt { get; init; }
 }
 
 public sealed class BuildingDef : Def;
@@ -179,4 +185,7 @@ public sealed class TerritoryDef : Def
 {
     /// <summary>Game minutes spent occupying the yard when walking through it.</summary>
     public float TravelMinutes { get; init; }
+
+    /// <summary>Portrait fragment when the person is in this yard. Null or empty — silent.</summary>
+    public PromptContribution? Prompt { get; init; }
 }