fix: Use resolved absolute URL in SSR fetch instead of relative path

The url variable was computed correctly but never used - fetch() still
received the original relative COMPONENTS_JSON_URL, causing "Failed to
parse URL from /components.json" on server-side rendering.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: davila7

dashboard/src/lib/data.ts

@@ -22,7 +22,7 @@ export async function fetchComponents(): Promise<ComponentsData> {
   const timeoutId = setTimeout(() => controller.abort(), 15000);
 
   try {
-    const res = await fetch(COMPONENTS_JSON_URL, {
+    const res = await fetch(url, {
       signal: controller.signal,
     });
     clearTimeout(timeoutId);