feat: implement textured line clear effects and refine UI alignment

- **Visual Effects**: Upgraded line clear particles to use the game's block texture instead of simple circles, matching the reference web game's aesthetic.
- **Particle Physics**: Tuned particle velocity, gravity, and fade rates for a more dynamic explosion effect.
- **Rendering Integration**: Updated [main.cpp](cci:7://file:///d:/Sites/Work/tetris/src/main.cpp:0:0-0:0) and `GameRenderer` to pass the block texture to the effect system and correctly trigger animations upon line completion.
- **Menu UI**: Fixed [MenuState](cci:1://file:///d:/Sites/Work/tetris/src/states/MenuState.cpp:19:0-19:55) layout calculations to use fixed logical dimensions (1200x1000), ensuring consistent centering and alignment of the logo, buttons, and settings icon across different window sizes.
- **Code Cleanup**: Refactored `PlayingState` to delegate effect triggering to the rendering layer where correct screen coordinates are available.

src/graphics/renderers/GameRenderer.h

@@ -0,0 +1,40 @@
+#pragma once
+#include <SDL3/SDL.h>
+#include "../../gameplay/core/Game.h"
+
+// Forward declarations
+class FontAtlas;
+class LineEffect;
+
+/**
+ * GameRenderer - Utility class for rendering the Tetris game board and HUD.
+ * 
+ * This class encapsulates all the game-specific rendering logic that was
+ * previously in main.cpp, making it reusable across different contexts.
+ */
+class GameRenderer {
+public:
+    // Render the complete playing state including game board, HUD, and effects
+    static void renderPlayingState(
+        SDL_Renderer* renderer,
+        Game* game,
+        FontAtlas* pixelFont,
+        LineEffect* lineEffect,
+        SDL_Texture* blocksTex,
+        float logicalW,
+        float logicalH,
+        float logicalScale,
+        float winW,
+        float winH,
+        bool showExitConfirmPopup
+    );
+
+private:
+    // Helper functions for drawing game elements
+    static void drawBlockTexture(SDL_Renderer* renderer, SDL_Texture* blocksTex, float x, float y, float size, int blockType);
+    static void drawPiece(SDL_Renderer* renderer, SDL_Texture* blocksTex, const Game::Piece& piece, float ox, float oy, float tileSize, bool isGhost = false);
+    static void drawSmallPiece(SDL_Renderer* renderer, SDL_Texture* blocksTex, PieceType pieceType, float x, float y, float tileSize);
+    
+    // Helper function for drawing rectangles
+    static void drawRect(SDL_Renderer* renderer, float x, float y, float w, float h, SDL_Color c);
+};