fix(ui): fix user_loans SQL query with HAVING clause for status filter

- Fix COUNT() misuse in SQLite subquery
- Use HAVING clause for aggregate function filtering (with_loans, no_loans)
- Properly count distinct users for pagination
- Maintain all search and pagination functionality

app.py

@@ -316,6 +316,7 @@ def user_loans():
         
         conditions = []
         params = []
+        having_conditions = []
         
         # Add search filter
         if search:
@@ -323,31 +324,38 @@ def user_loans():
             search_param = f"%{search}%"
             params.extend([search_param, search_param, search_param])
         
-        # Add status filter
+        # Add status filter (use HAVING for aggregate functions)
         if status_filter == 'with_loans':
-            conditions.append("COUNT(l.id) > 0")
+            having_conditions.append("COUNT(l.id) > 0")
         elif status_filter == 'no_loans':
-            conditions.append("COUNT(l.id) = 0")
+            having_conditions.append("COUNT(l.id) = 0")
         
-        # Combine conditions
+        # Combine conditions for WHERE clause
+        where_clause = ""
         if conditions:
-            query += " WHERE " + " AND ".join(conditions)
+            where_clause = " WHERE " + " AND ".join(conditions)
+        
+        # Combine HAVING conditions
+        having_clause = ""
+        if having_conditions:
+            having_clause = " HAVING " + " AND ".join(having_conditions)
         
         # Group by and order
-        query += " GROUP BY u.id, u.name, u.identification, u.email, u.phone"
-        query += " ORDER BY u.name COLLATE NOCASE"
+        group_by = " GROUP BY u.id, u.name, u.identification, u.email, u.phone"
+        order_by = " ORDER BY u.name COLLATE NOCASE"
         
         # Get total count for pagination
-        count_query = f"SELECT COUNT(*) FROM ({query})"
+        # We need to count distinct users matching the criteria
+        count_query = f"SELECT COUNT(DISTINCT u.id) FROM users u LEFT JOIN loans l ON u.id = l.user_id AND l.status = 'active'{where_clause}{having_clause}"
         cursor.execute(count_query, params)
         total_users = cursor.fetchone()[0]
         total_pages = (total_users + per_page - 1) // per_page
         
-        # Add pagination to query
-        query += f" LIMIT {per_page} OFFSET {offset}"
+        # Build final query with pagination
+        final_query = query + where_clause + group_by + having_clause + order_by + f" LIMIT {per_page} OFFSET {offset}"
         
         # Execute main query
-        cursor.execute(query, params)
+        cursor.execute(final_query, params)
         users = cursor.fetchall()
         
         # Convert to list of dicts for template
@@ -388,6 +396,8 @@ def user_loans():
                                per_page=per_page)
 
 
+
+
 @app.route('/user_loans/<int:user_id>')
 def user_loans_detail(user_id):
     """