feat: reduce image export scaling to a clean 2x factor to avoid excessively large file sizes

Author: ThisIs-Developer

script.js

@@ -10249,7 +10249,7 @@ document.addEventListener("DOMContentLoaded", async function () {
   function svgToCanvas(svgEl) {
     return new Promise((resolve, reject) => {
       const bbox = svgEl.getBoundingClientRect();
-      const scale = Math.max(window.devicePixelRatio || 1, 3);
+      const scale = 2; // 2x scale for high quality without excessive file size
       const width  = Math.max(Math.round(bbox.width),  1);
       const height = Math.max(Math.round(bbox.height), 1);
 
@@ -10843,7 +10843,7 @@ document.addEventListener("DOMContentLoaded", async function () {
     return new Promise((resolve, reject) => {
       try {
         const canvas = document.createElement('canvas');
-        const scale = 3; // 3x scale for high-definition (crisp text)
+        const scale = 2; // 2x scale for high quality without being excessively large
 
         let width = imgEl.naturalWidth || imgEl.width || 800;
         let height = imgEl.naturalHeight || imgEl.height || 600;
@@ -10853,13 +10853,6 @@ document.addEventListener("DOMContentLoaded", async function () {
           height = originalDim.height;
         }
 
-        // Enforce a minimum base width of 1600px to guarantee crisp detail on large D2 diagrams
-        if (width < 1600) {
-          const aspect = height / width;
-          width = 1600;
-          height = width * aspect;
-        }
-        
         canvas.width = width * scale;
         canvas.height = height * scale;