src/streamlit_app.py

import streamlit as st
import pandas as pd

st.set_page_config(page_title="CSV Viewer", layout="wide")

st.title("📄 CSV File Viewer")

uploaded_file = st.file_uploader(
    "Choose a CSV file",
    type="csv",
    accept_multiple_files=False,
)

if uploaded_file is not None:
    try:
        df = pd.read_csv(uploaded_file)
        st.success(f"Loaded {uploaded_file.name} ({df.shape[0]} rows × {df.shape[1]} columns)")
        st.dataframe(df, use_container_width=True)
    except Exception as e:
        st.error(f"Error reading file: {e}")
else:
    st.info("Upload a CSV file to view its contents as a table.")