Удалены лишние сервисы

ARCHITECTURE.md

@@ -199,24 +199,20 @@ For a 64×64 image, 1 document, 1 layer, 16-color palette:
 | Interface              | Methods (key)                                    |
 |------------------------|--------------------------------------------------|
 | `ICompositor`          | `uint[] Composite(MinintDocument, int w, int h)` |
-| `IPaletteService`      | `int EnsureColor(doc, RgbaColor)`, `void CompactPalette(doc)` |
 | `IDrawingService`      | `void ApplyBrush(layer, x, y, radius, colorIdx, w, h)` |
 | `IFloodFillService`    | `void Fill(layer, x, y, newColorIdx, w, h)`      |
 | `IImageEffectService`  | `void AdjustContrast(doc, float factor)`, `void ToGrayscale(doc)` |
 | `IPatternGenerator`    | `MinintDocument Generate(PatternParams)`          |
-| `IFragmentService`     | `void CopyFragment(src, dst, rect, destPoint)`   |
 
 ### 4.3 Core — Service Implementations
 
 | Class                  | Implements              | Notes                              |
 |------------------------|-------------------------|------------------------------------|
 | `Compositor`           | `ICompositor`           | Alpha-blends layers bottom→top     |
-| `PaletteService`       | `IPaletteService`       | Color lookup, add, compact         |
 | `DrawingService`       | `IDrawingService`       | Circle mask brush/eraser           |
 | `FloodFillService`     | `IFloodFillService`     | BFS flood fill on index array      |
 | `ImageEffectService`   | `IImageEffectService`   | Palette-based contrast/grayscale   |
 | `PatternGenerator`     | `IPatternGenerator`     | Checkerboard, gradient, stripes…   |
-| `FragmentService`      | `IFragmentService`      | Copy rect with palette merging     |
 
 ### 4.4 Infrastructure
 
@@ -294,7 +290,7 @@ while queue not empty:
 
 ### 5.4 Palette Compaction
 
-On save (or on demand):
+Optional optimization (not implemented as a separate service; could be applied on save or on demand):
 1. Scan all layers, collect used indices into a `HashSet<int>`.
 2. Build new palette = only used colors (keep index 0 = transparent).
 3. Build old→new index mapping.
@@ -306,12 +302,12 @@ On save (or on demand):
 for each pixel (sx, sy) in source rect:
     srcIdx = srcLayer.Pixels[sy * W + sx]
     srcColor = srcDoc.Palette[srcIdx]
-    dstIdx = dstDoc.PaletteService.EnsureColor(srcColor)
+    dstIdx = dstDoc.EnsureColorCached(srcColor)
     dstLayer.Pixels[destY * W + destX] = dstIdx
     destX++; ...
 ```
 
-`EnsureColor` checks if color exists in target palette; if not, appends it and returns the new index.
+`EnsureColorCached` checks if color exists in target palette; if not, appends it and returns the new index.
 
 ### 5.6 Contrast (A1)