Keep technology logos and images inside text safe from pruning

Media::referencedPaths() is what `content:prune --media` asks before
deleting a file, and it did not know about two kinds of image a page
shows:

- A technology's logo. Every logo on the radar looked orphaned, and one
  prune would have deleted all of them.
- Images inside rich text — a page's body, a project's description,
  decisions and postmortem — whether attached in the panel's editor or
  uploaded through the API and written in as <img src>. They are now
  found in the HTML, in every language, bin included.

The page body's editor also states where attachments go — the media
disk, pages/content, public — instead of relying on Filament's
defaults: the HTML reaches the frontend as it is, and a private file
would be a broken image there.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Filament/Resources/Pages/Schemas/PageForm.php

@@ -75,6 +75,15 @@ class PageForm
 
                         RichEditor::make("body.{$locale}")
                             ->label(__('panel.pages.fields.body'))
+                            // Images in the text go where every other upload
+                            // does, public: the HTML travels to the frontend
+                            // as it is, with each image's URL written in, and
+                            // a private file would be a broken image there.
+                            // Media::referencedPaths() finds them in the body,
+                            // so pruning never takes one a page still shows.
+                            ->fileAttachmentsDisk(config('media.disk'))
+                            ->fileAttachmentsDirectory('pages/content')
+                            ->fileAttachmentsVisibility('public')
                             ->columnSpanFull(),
                     ]),
                 ]),