[#1998] Fix hard to read text in dark labels (#2029)

Text in file type labels in the summary view are hard to read,
particularly when the label background is dark.

Let's make the text in the labels readable when the label
background is dark.

frontend/src/views/c-authorship.vue

@@ -760,8 +760,8 @@ export default defineComponent({
       return `${file.lineCount} (${file.lineCount - (file.blankLineCount ?? 0)})`;
     },
 
-    getFontColor() {
-      return window.getFontColor;
+    getFontColor(color: string) {
+      return window.getFontColor(color);
     },
   },
 });

frontend/src/views/c-summary.vue

@@ -930,8 +930,8 @@ export default defineComponent({
       return window.getDateStr(datems);
     },
 
-    getFontColor() {
-      return window.getFontColor;
+    getFontColor(color: string) {
+      return window.getFontColor(color);
     },
   },
 });

frontend/src/views/c-zoom.vue

@@ -505,8 +505,8 @@ export default defineComponent({
       return false;
     },
 
-    getFontColor() {
-      return window.getFontColor;
+    getFontColor(color: string) {
+      return window.getFontColor(color);
     },
   },
 });