fix: trim whitespace from network sync URL and API key; clarify source URL format in UI

Copy-paste often adds trailing whitespace that breaks the API key comparison.
Updated placeholder and description to show the correct URL format (no port number).

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

apps/Backend/src/routes/database-management.ts

@@ -574,7 +574,12 @@ router.get("/network-sync-config", (req, res) => {
 router.put("/network-sync-config", (req: Request, res: Response): any => {
   if (!req.user?.id) return res.status(401).json({ error: "Unauthorized" });
   const { enabled, syncHour, sourceUrl, apiKey } = req.body;
-  const updated = writeSyncConfig({ enabled, syncHour, sourceUrl, apiKey });
+  const updated = writeSyncConfig({
+    enabled,
+    syncHour,
+    sourceUrl: typeof sourceUrl === "string" ? sourceUrl.trim() : sourceUrl,
+    apiKey: typeof apiKey === "string" ? apiKey.trim() : apiKey,
+  });
   res.json(updated);
 });
 

apps/Frontend/src/components/database-management/network-backup-manager.tsx

@@ -92,8 +92,8 @@ export function NetworkBackupManager() {
       const res = await apiRequest("PUT", "/api/database-management/network-sync-config", {
         enabled,
         syncHour,
-        sourceUrl,
-        apiKey: receiverApiKey,
+        sourceUrl: sourceUrl.trim(),
+        apiKey: receiverApiKey.trim(),
       });
       return res.json();
     },
@@ -191,7 +191,7 @@ export function NetworkBackupManager() {
           <p className="text-xs text-gray-500">
             Configure this machine to pull a fresh copy of the database and all uploaded
             files (patient photos, cloud storage, documents) from another PC at a scheduled
-            time each day. Enter the source PC's local IP address and its Backup Key.
+            time each day. Enter the source PC's URL (e.g. http://192.168.0.94 — no port number) and the Backup Key shown in the source PC's Network Backup section.
           </p>
 
           {/* Enable toggle + time picker on same row */}
@@ -229,7 +229,7 @@ export function NetworkBackupManager() {
           <div className="space-y-2">
             <label className="text-xs font-medium text-gray-600">Source PC URL</label>
             <Input
-              placeholder="http://192.168.0.94:3000"
+              placeholder="http://192.168.0.94"
               value={sourceUrl}
               onChange={(e) => setSourceUrl(e.target.value)}
             />