Add pie/donut charts showing portfolio breakdown by sector (technology, utilities, consumer staples, etc.) and geography (US, international) to help users identify concentration risk. ## Acceptance Criteria - [ ] Fetch sector/industry data per ticker from yfinance - [ ] - [ ] Pie chart: portfolio weight by sector - [ ] - [ ] Pie chart: portfolio weight by country/region - [ ] - [ ] Click-through to filter positions by sector - [ ] - [ ] Export breakdown as CSV
Add pie/donut charts showing portfolio breakdown by sector (technology, utilities, consumer staples, etc.) and geography (US, international) to help users identify concentration risk.
Acceptance Criteria