Description
Add a simple line chart to the Portfolio screen showing total value over time (1D, 1W, 1M). Complexity: High (200 points) 📉

Requirements and Context

• Use a library like react-native-wagmi-charts or victory-native.
• Depends on: GET /portfolio/history.

Success Criteria (Done)

• Line chart integrated at the top of the Portfolio tab.
• Time range selector (tabs for 1D, 1W, 1M, ALL).
• Smooth loading state while fetching historical data.

Suggested Execution

• Branch: feat/mobile-portfolio-charts
• Implementation: Ensure charts are performant and match the theme.

Test and Commit

• Testing: Verify chart updates correctly when switching time ranges.
• Example Commit Message: feat(mobile): add interactive portfolio performance charts
• Screenshots: Include a screenshot of the Portfolio screen with the chart.