Fix GPS globe startup and satellite polling errors

routes/gps.py

@@ -207,21 +207,22 @@ def get_position():
             })
 
 
-@gps_bp.route('/satellites')
-def get_satellites():
-    """Get current satellite sky view data."""
-    reader = get_gps_reader()
-
-    if not reader or not reader.is_running:
-        return jsonify({
-            'status': 'error',
-            'message': 'GPS client not running'
-        }), 400
-
-    sky = reader.sky
-    if sky:
-        return jsonify({
-            'status': 'ok',
+@gps_bp.route('/satellites')
+def get_satellites():
+    """Get current satellite sky view data."""
+    reader = get_gps_reader()
+
+    if not reader or not reader.is_running:
+        return jsonify({
+            'status': 'waiting',
+            'running': False,
+            'message': 'GPS client not running'
+        })
+
+    sky = reader.sky
+    if sky:
+        return jsonify({
+            'status': 'ok',
             'sky': sky.to_dict()
         })
     else: