This commit improves / simplifies the media handling within the app.
Until now we always had to provide the type of the media file (item
media / source icon) when we wanted to display it. This is now not
necessary anymore. Instead we always display the image from it's
original path when the url starts with "http://" or "https://".
Additionally we also check the platform to proxy the image request on
the web. If the image doesn't start with "http://" or "https://" we
always try to display the image from the Supabase storage.
For this we also adjusted the corresponding Deno function, so that we
check if the image starts with "http://" or "https://" before we upload
it to the Supabase storage. If this is the case we upload the source
icon to the Supabase storage. If the upload fails, we will use the
original path of the icon.
Last but not least this commit also introduces our own
"CachedNetworkImage" widget, which wraps the original
"CachedNetworkImage" widget. Our own widget will ensure that we use the
correct url for the image request, so that we do not have to use this
function all over the app anymore. Later this widget can also be used to
introduce our own cache manager.
Improve the media handling within the app. We do not save the media
files for items to the Supabase storage anymore. The source icons are
now only saved in the Supabase storage, the usage of an url as source
icon is not possible anymore.
The media files for items are directly retrieved from the corresponding
url or for the web version from the "image-proxy-v1" Supabase function.
If the image is retireved from the Supabase function we cache the image
in the browser via the cache control headers. If the image is directly
retrieved from it's url it's cached by the "CachedNetworkImage" widget.
