## Summary
Adds daily granularity support to the dashboard Net Worth Evolution
chart, mirroring the daily balance feature added for individual account
pages in #135.
## Why
The net worth chart only supported monthly granularity, making it
impossible to see short-term net worth fluctuations. Users who track
daily balances need a way to visualize day-over-day net worth changes
across all accounts.
## Screenshots
<img width="1263" height="714" alt="image"
src="https://github.com/user-attachments/assets/646e7e21-5c1b-42dc-9a20-5e9b6d5d72b4"
/>
<img width="1261" height="715" alt="image"
src="https://github.com/user-attachments/assets/b9fe5080-55f3-485a-a566-1d25d83518c7"
/>