cast to percentage

server/src/routes/chemicals.ts

@@ -13,7 +13,7 @@ function camelToSnake(str: string): string {
 router.get('/', async (req, res) => {
   try {
     const result = await pool.query(
-      'SELECT * FROM chemicals WHERE user_id = $1 ORDER BY created_at DESC',
+      'SELECT *, percentage_full::float AS percentage_full FROM chemicals WHERE user_id = $1 ORDER BY created_at DESC',
       [req.user!.id]
     );
     // Map snake_case columns back to camelCase for the frontend