#4 Issue 4: [Chart] Energy Consumption History

[elizabetheonoja-art]

Description:
Users want to track their spending. Implement a bar chart showing Daily Cost for the last 30 days.

Acceptance Criteria:

[ ] X-Axis: Date (Day).

[ ] Y-Axis: Cost (XLM/USDC).

[ ] Tooltip: "You spent 5 XLM on Jan 12".

[ ] Fetch data from Backend API.

Priority: Medium
Labels: analytics, data