Adds a stacked area chart under the Allocation tab that displays how the
portfolio allocation percentages have changed across months.
Fixes#25
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Adds multi-source selection to the evolution chart source filter.
Users can now tap multiple sources to compare their evolution side by side,
regardless of which category they belong to.
Fixes#24
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
alexandrev-tibco
alexandrev