Fix grid placement logic

Modules/Config.lua

@@ -230,18 +230,24 @@ StaticGridFrame = {
     ---@param rowspan number
     ---@param colspan number
     Add = function(self, frame, rowspan, colspan)
+        if rowspan > self.rows or colspan > self.columns then
+            print("Rowspan or colspan exceeds grid dimensions.")
+            return
+        end
+
         for row = 1, self.rows do
             for col = 1, self.columns do
                 if not self.occupancy[row][col] then
                     local canPlace = true
                     for r = row, row + rowspan - 1 do
                         for c = col, col + colspan - 1 do
-                            if not self.occupancy[r] or self.occupancy[r][c] then
+                            -- Check if r or c is out of bounds or if the cell is occupied
+                            if r > self.rows or c > self.columns or self.occupancy[r][c] then
                                 canPlace = false
                                 break
                             end
-                            if not canPlace then break end
                         end
+                        if not canPlace then break end
                     end
                     if canPlace then
                         local x = (col - 1) * self.cellWidth