Auto-Sync and Manual Refresh: Ensured fresh data on reload and added Sync button

api/fetch-ads.ts

@@ -14,7 +14,13 @@ export default async function handler(req: VercelRequest, res: VercelResponse) {
 
     try {
         console.log('[fetch-ads] Fetching Ads from Dropbox...');
-        const response = await fetch(ADS_DROPBOX_URL);
+        const response = await fetch(ADS_DROPBOX_URL, {
+            cache: 'no-store',
+            headers: {
+                'Pragma': 'no-cache',
+                'Cache-Control': 'no-cache'
+            }
+        });
 
         if (!response.ok) {
             throw new Error(`Dropbox responded with ${response.status}`);