fix: enhance SVG initialization and scaling in card rendering

lib/mtg_card_maker.rb

@@ -161,7 +161,7 @@ class Template
     def initialize(width: CARD_WIDTH, height: CARD_HEIGHT, embed_font: false)
       @width = width
       @height = height
-      @svg = Victor::SVG.new width: width, height: height
+      @svg = Victor::SVG.new width: width, height: height, viewBox: "0 0 #{width} #{height}"
       embed_font(embed: embed_font)
     end
 

lib/mtg_card_maker/sprite_sheet_builder.rb

@@ -65,7 +65,12 @@ def add_card_to_sprite(xml, card_file, index, embed_font)
       return unless svg_element
 
       xml.g(transform: "translate(#{position[:x]}, #{position[:y]})") do
-        add_card_children(xml, svg_element, embed_font)
+        # Add the card with its own viewBox for proper scaling
+        xml.svg(viewBox: "0 0 #{CARD_WIDTH} #{CARD_HEIGHT}",
+                width: CARD_WIDTH,
+                height: CARD_HEIGHT) do
+          add_card_children(xml, svg_element, embed_font)
+        end
       end
     end