docs: regenerate dashboard-ia diagram to match corrected prose

The Dashboard docs page commit (4f37f72) corrected the prose + alt-text
to drop the false "multi-view" claim, but the diagram image itself still
visually showed a "Fullscreen + multi-view" branch. Regenerated via
Nano Banana Pro using the original as input image to preserve every
other element (color palette, card borders, ADMIN pills, line tick
marks, caption text, grid background).

Now matches reality on every surface: no Settings > Camera Groups,
no multi-view, no false grouping claim.

Both .jpg and .webp variants regenerated.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Sbussiso