feat: Add CSV report viewing functionality to technical scanner page

src/streamlit_app.py

@@ -18,6 +18,30 @@ def init_session_state():
     if 'page' not in st.session_state:
         st.session_state.page = 'Trading Journal'
 
+def load_scanner_reports():
+    """Load and return available scanner reports"""
+    import os
+    import pandas as pd
+    from datetime import datetime
+    
+    reports = []
+    reports_dir = "scanner_results"
+    
+    if os.path.exists(reports_dir):
+        for file in os.listdir(reports_dir):
+            if file.endswith(".csv"):
+                file_path = os.path.join(reports_dir, file)
+                # Get file creation time
+                created = datetime.fromtimestamp(os.path.getctime(file_path))
+                reports.append({
+                    'name': file,
+                    'path': file_path,
+                    'created': created
+                })
+    
+    # Sort by creation time, newest first
+    return sorted(reports, key=lambda x: x['created'], reverse=True)
+
 def format_datetime(dt):
     """Format datetime for display"""
     if dt:
@@ -269,6 +293,10 @@ def trading_journal_page():
 def technical_scanner_page():
     st.header("Technical Scanner")
     
+    # Create tabs for scanner and reports
+    scanner_tab, reports_tab = st.tabs(["Run Scanner", "View Reports"])
+    
+    with scanner_tab:
         scanner_type = st.selectbox(
             "Select Scanner",
             ["SunnyBands", "ATR-EMA", "ATR-EMA v2"]
@@ -305,6 +333,39 @@ def technical_scanner_page():
                 except Exception as e:
                     st.error(f"Error running scanner: {str(e)}")
     
+    with reports_tab:
+        st.subheader("Scanner Reports")
+        
+        reports = load_scanner_reports()
+        if reports:
+            # Create a selectbox to choose the report
+            selected_report = st.selectbox(
+                "Select Report",
+                options=reports,
+                format_func=lambda x: f"{x['name']} ({x['created'].strftime('%Y-%m-%d %H:%M')})"
+            )
+            
+            if selected_report:
+                try:
+                    # Load and display the CSV
+                    df = pd.read_csv(selected_report['path'])
+                    
+                    # Add download button
+                    st.download_button(
+                        label="Download Report",
+                        data=df.to_csv(index=False),
+                        file_name=selected_report['name'],
+                        mime='text/csv'
+                    )
+                    
+                    # Display the dataframe
+                    st.dataframe(df)
+                    
+                except Exception as e:
+                    st.error(f"Error loading report: {str(e)}")
+        else:
+            st.info("No scanner reports found")
+
 def main():
     st.set_page_config(page_title="Trading System", layout="wide")
     init_session_state()