fix(svgcanvas): Handle 'none' stroke color in SVG elements (#1084)

This update modifies the stroke color handling in both the SvgCanvas and ext-connector modules. When the stroke color is set to 'none', it now correctly assigns an empty string or 'none' instead of a hex value, ensuring proper rendering of SVG elements without strokes.

packages/svgcanvas/svgcanvas.js

@@ -201,7 +201,9 @@ class SvgCanvas {
           this.curConfig.initFill.color,
         fill_paint: null,
         fill_opacity: this.curConfig.initFill.opacity,
-        stroke: `#${this.curConfig.initStroke.color}`,
+        stroke:
+          (this.curConfig.initStroke.color === 'none' ? '' : '#') +
+          this.curConfig.initStroke.color,
         stroke_paint: null,
         stroke_opacity: this.curConfig.initStroke.opacity,
         stroke_width: this.curConfig.initStroke.width,

src/editor/extensions/ext-connector/ext-connector.js

@@ -447,7 +447,10 @@ export default {
               attr: {
                 id: 'conn_' + svgCanvas.getNextId(),
                 points: `${x},${y} ${x},${y} ${startX},${startY}`,
-                stroke: `#${initStroke.color}`,
+                stroke:
+                  initStroke.color === 'none'
+                    ? 'none'
+                    : `#${initStroke.color}`,
                 'stroke-width':
                   !startElem.stroke_width || startElem.stroke_width === 0
                     ? initStroke.width