Fix: Measurement text invisible in SVG export due to white color

Measurements in OpenWebCAD use a default line color of white. When exporting to SVG, the SvgDrawController correctly changes white lines and fills to black for visibility against the SVG's white background.

However, the text color for measurements was passed directly to the SVG text element. If the measurement color was white (default), the text would be white on a white background, rendering it invisible.

This commit modifies the `SvgDrawController.drawText` method to check if the incoming text color is white. If it is, the color is changed to black ('#000') before rendering the SVG text element. Other colors are unaffected, ensuring they appear as intended in the SVG output.

Author: google-labs-jules[bot]

src/drawControllers/svg.drawController.ts

@@ -211,8 +211,17 @@ export class SvgDrawController implements DrawController {
 			...options,
 		};
 
+    let finalTextColor = textOptions.textColor;
+    const lowerCaseTextColor = textOptions.textColor.toLowerCase();
+    if (lowerCaseTextColor === '#fff' || lowerCaseTextColor === '#ffffff' || lowerCaseTextColor === 'white') {
+        finalTextColor = '#000'; // Change to black if current color is white
+    }
+    // No need to handle black to white, as SVG background is white.
+    // Other colors will remain as they are.
+
 		this.svgStrings.push(
-			`<text x="${canvasBasePoint.x}" y="${canvasBasePoint.y}" fill="${textOptions.textColor}" font-size="${textOptions.fontSize}" font-family="${textOptions.fontFamily}">${label}</text>`
+        // Use finalTextColor here
+        `<text x="${canvasBasePoint.x}" y="${canvasBasePoint.y}" fill="${finalTextColor}" font-size="${textOptions.fontSize}" font-family="${textOptions.fontFamily}">${label}</text>`
 		);
 	}