feat(touch): add press/release detection with touch-down tracking

libraries/KlubhausCore/src/DisplayManager.h

@@ -143,6 +143,68 @@ public:
             _drv->updateHint(x, y, active);
     }
 
+    /// Show touch feedback - highlights the tile at given coordinates
+    /// Returns true if a valid tile is being touched
+    bool showTouchFeedback(int x, int y) {
+        if(!_drv || _gridCols <= 0) return false;
+        
+        // Transform touch coordinates
+        _drv->transformTouch(&x, &y);
+        
+        int headerH = 30;
+        if(y < headerH) return false;
+        
+        // Calculate which cell
+        int cellW = _drv->width() / _gridCols;
+        int cellH = (_drv->height() - headerH) / _gridRows;
+        
+        int col = x / cellW;
+        int row = (y - headerH) / cellH;
+        
+        if(col < 0 || col >= _gridCols || row < 0 || row >= _gridRows)
+            return false;
+        
+        // Find which tile is at this position
+        for(int i = 0; i < _tileCount; i++) {
+            const TileLayout& lay = _layouts[i];
+            if(lay.col <= col && col < lay.col + lay.cols &&
+               lay.row <= row && lay.row + lay.rows > row) {
+                // Found the tile - draw highlight via driver
+                _drv->updateHint(lay.x, lay.y, true);  // active=true means show feedback
+                return true;
+            }
+        }
+        return false;
+    }
+    
+    /// Clear touch feedback
+    void clearTouchFeedback() {
+        if(_drv)
+            _drv->updateHint(0, 0, false);  // active=false means clear
+    }
+    
+    /// Check if current position is still in same tile as touch-down
+    bool isSameTile(int downX, int downY, int currentX, int currentY) const {
+        if(!_drv || _gridCols <= 0 || downX < 0) return false;
+        
+        int dx = downX, dy = downY;
+        int cx = currentX, cy = currentY;
+        
+        _drv->transformTouch(&dx, &dy);
+        _drv->transformTouch(&cx, &cy);
+        
+        int headerH = 30;
+        int cellW = _drv->width() / _gridCols;
+        int cellH = (_drv->height() - headerH) / _gridRows;
+        
+        int downCol = dx / cellW;
+        int downRow = (dy - headerH) / cellH;
+        int curCol = cx / cellW;
+        int curRow = (cy - headerH) / cellH;
+        
+        return downCol == curCol && downRow == curRow;
+    }
+
     int width() { return _drv ? _drv->width() : 0; }
     int height() { return _drv ? _drv->height() : 0; }