fix: correct Traccar Client setup instructions

- Remove unreliable QR code scanning, add direct app store links
- Fix server URL to use HTTP (not HTTPS) for port 5055
- OsmAnd protocol doesn't use SSL
- Emphasize that official Traccar Client app is required

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/src/pages/GpsTracking.tsx

@@ -776,23 +776,32 @@ export function GpsTracking() {
                   </div>
                 )}
 
-                {/* QR Code for Traccar Client app */}
-                <div className="bg-white p-4 rounded-lg border border-border">
+                {/* Manual Configuration - Traccar Client doesn't reliably scan QR codes */}
+                <div className="bg-blue-50 dark:bg-blue-950/30 p-4 rounded-lg border border-blue-200 dark:border-blue-800">
                   <div className="flex items-center gap-2 mb-3">
-                    <QrCode className="h-5 w-5 text-primary" />
-                    <span className="text-sm font-medium text-foreground">Scan with Traccar Client</span>
+                    <Smartphone className="h-5 w-5 text-blue-600" />
+                    <span className="text-sm font-medium text-blue-800 dark:text-blue-200">Download Traccar Client</span>
                   </div>
-                  <div className="flex justify-center">
-                    {/* Traccar Client expects: serverUrl?id=xxx&interval=xxx&accuracy=high */}
-                    <QRCodeSVG
-                      value={`https://${enrollmentResult.serverUrl.replace(/:\d+$/, '')}?id=${enrollmentResult.deviceIdentifier}&interval=${settings?.updateIntervalSeconds || 60}&accuracy=high`}
-                      size={180}
-                      level="M"
-                      includeMargin={true}
-                    />
+                  <div className="flex gap-2 justify-center mb-3">
+                    <a
+                      href="https://apps.apple.com/app/traccar-client/id843156974"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="px-3 py-1 bg-blue-600 text-white text-sm rounded hover:bg-blue-700"
+                    >
+                      iOS App Store
+                    </a>
+                    <a
+                      href="https://play.google.com/store/apps/details?id=org.traccar.client"
+                      target="_blank"
+                      rel="noopener noreferrer"
+                      className="px-3 py-1 bg-green-600 text-white text-sm rounded hover:bg-green-700"
+                    >
+                      Google Play
+                    </a>
                   </div>
-                  <p className="text-xs text-center text-muted-foreground mt-2">
-                    Open Traccar Client → Settings → Scan QR Code
+                  <p className="text-xs text-center text-blue-700 dark:text-blue-300">
+                    Must use official Traccar Client app (not other GPS apps)
                   </p>
                 </div>