docs: update game patterns documentation

docs/GamePatterns.md

@@ -13,7 +13,7 @@ packages/my-game/
 │   ├── game/          # Pure game logic (re-exported from boardgame-core)
 │   ├── scenes/        # Phaser scenes (MenuScene, GameScene)
 │   ├── spawners/      # Data-driven object lifecycle
-│   ├── renderers/     # Renderers for game objects
+│   ├── gameobjects/   # Phaser GameObject or Container extensions
 │   ├── state/         # UI-only reactive state
 │   ├── config.ts      # Centralized layout & style constants
 │   └── ui/App.tsx     # Preact root component
@@ -24,7 +24,7 @@ packages/my-game/
 | `game/` | State, commands, prompts, validation (pure logic) |
 | `scenes/` | Phaser lifecycle, input handling, visual composition |
 | `spawners/` | Reactive game object spawn/update/despawn |
-| `renderers/` | Phaser visual representation of game objects |
+| `gameobjects/` | Phaser GameObjects or containers |
 | `state/` | UI-only reactive state (selection, hover, etc.) |
 | `ui/` | Preact components bridging Phaser and DOM |
 
@@ -51,9 +51,9 @@ Use `MutableSignal` for UI-only state, separate from game state.
 - Clean up effects on object `'destroy'` to prevent leaks.
 - See: `packages/onitama-game/src/state/ui.ts`
 
-### 4. Custom Containers
+### 4. Custom GameObjects / Containers
 Extend `Phaser.GameObjects.Container` to encapsulate visuals and state.
-- Store logical state as private signals.
+- Use signals from `states/`, avoid relying on complex interal state.
 - Use `effect()` for reactive highlights/selections.
 
 ### 5. Tween Interruption
@@ -66,6 +66,12 @@ Otherwise the game logic will hang.
 Use `await this.sceneController.launch('SceneKey')`.
 Register scenes in `App.tsx` via `<PhaserScene>`. Pass data via `data` prop.
 
+### 7. Central Config
+Use `src/config/layout.ts` for shared constants like `CELL_SIZE`, `BOARD_OFFSET`, etc.
+Use `src/config/colors.ts` for shared colors.
+Use `src/config/text.ts` for text styles.
+
+
 ## Best Practices
 
 - **Centralize Config**: Keep `CELL_SIZE`, `BOARD_OFFSET`, colors, etc., in `src/config.ts` with `as const`. Avoid magic numbers.