many updates

FitnessSync/backend/templates/discovery.html

@@ -440,5 +440,23 @@
             alert('Error saving segment: ' + err.message);
         }
     }
+    // Handle Query Params
+    document.addEventListener('DOMContentLoaded', () => {
+        const urlParams = new URLSearchParams(window.location.search);
+        const actId = urlParams.get('activity_id');
+        
+        if (actId) {
+            // Switch to single tab
+            const tabEl = document.getElementById('single-tab');
+            const tab = new bootstrap.Tab(tabEl);
+            tab.show();
+            
+            // Fill ID
+            document.getElementById('activityId').value = actId;
+            
+            // Trigger search
+            document.getElementById('singleSearchBtn').click();
+        }
+    });
 </script>
 {% endblock %}