Add app.py, backend, requirements, ignore models folder

app.py

@@ -136,6 +136,6 @@ elif page == "Reports & Plots":
         if os.path.exists(p):
             with rows[i % 2]:
                 st.markdown(f"**{title}**")
-                st.image(p, use_container_width=True)
+                st.image(p)
         else:
             st.info(f"{fname} not available yet.")