fix(app-crm): replace owner chart with forecast-category chart on sales dashboard

The 'Opportunities by Owner' horizontal-bar widget grouped opportunities by
the owner lookup field. In the standalone demo only one user exists
(the admin auto-created on first sign-up), so every opportunity has
owner=null and the chart collapsed to a single anonymous bar.

Replace it with 'Pipeline by Forecast Category' which groups by
forecast_category (best_case / commit / pipeline / closed / omitted) —
already populated with real distribution by the seed dataset, giving a
meaningful sales view without depending on user seeding.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: hotlong