feat: Add "Recebimento" dashboard page with data visualization, session management, and a loading screen.

pages/rec.py

@@ -238,12 +238,13 @@ setTimeout(next, 300);
 """
 
 loading_placeholder = st.empty()
-loading_placeholder.components.v1.html(loading_html, height=0)
+
+with loading_placeholder:
+    components.html(loading_html, height=0)
 
 df_recebimento = read_ws("recebimento")
 df_rec_dados   = read_ws("rec_dados")
 
-# Fecha o loading ao terminar
 loading_placeholder.empty()