Fix NameError: positions_table not defined

- Removed demo.load line that referenced deleted positions_table
- Fixed investment performance demo.load to use HTML function
- Application should now start without errors

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

app.py

@@ -1868,14 +1868,13 @@ def create_dashboard():
             outputs=[portfolio_value, buying_power, cash, day_change, equity]
         )
         demo.load(fn=create_portfolio_chart, outputs=[portfolio_chart])
-        demo.load(fn=refresh_positions_table, outputs=[positions_table])
         demo.load(
             fn=refresh_vm_stats,
             outputs=[total_ipos, ipos_invested, cs_stocks, investment_rate, last_updated]
         )
         demo.load(fn=create_ipo_discovery_chart, outputs=[ipo_chart])
         demo.load(fn=refresh_ipo_discoveries_table, outputs=[ipo_table])
-        demo.load(fn=refresh_investment_performance_table, outputs=[investment_performance_table])
+        demo.load(fn=refresh_investment_performance_html, outputs=[investment_performance_table])
     
     return demo