Add Components/Loading.razor and swap the ad-hoc `<p>Lädt…</p>` guard
visuals for it across the four reports, three edit dialogs, and three
chart pages (the last three now show the placeholder instead of a
blank page while waiting for view data). Kept as a pure visual so
each call site changes from `<p>Lädt…</p>` to `<Loading/>` with no
other churn.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Claudio Schaad
58ca05f83e