a Media section, browsing the site's originals in place

a new section above Administration. it embeds THE PLATFORM'S OWN file browser rather
than drawing a file list — upload, delete, rename, move, thumbnails, the context
menu and every task hanging off it already exist and are maintained in one place. a
plugin's own would be a second to keep in step, arriving without any of that.

`basePath` IS A JAIL, not a starting folder: `useFileBrowserApp` resets currentPath
whenever it leaves, so pointing it at `<root>/media/originals` means the breadcrumb
stops there and `derived/` is not reachable by navigating. that is what was asked
for — people work in originals, derived is made for them.

IT IS A GUARDRAIL AND NOT A PERMISSION BOUNDARY, and the panel says so in its own
docstring because the difference will matter to whoever reads this next. the
file-browser API is unchanged and still addresses the whole home: anyone with file
access reaches derived/ through the Files screen. this prevents an accident, not a
determined person. confining it properly means scoping that API per user, which is a
platform change and a much larger one.

the panel also says, once, that derived/ exists and is made from these — otherwise
somebody who knows about it would think it had been lost.

`rootRelative` is new on the settings API because only the SERVER knows what home
is. the file browser addresses everything relative to a root, and a browser deriving
that prefix from the absolute path would be guessing. null when the root sits
outside home — a legitimate setting the browser cannot address, which the panel
explains rather than rendering an empty folder.

NOTHING HERE IS FOFOS-SPECIFIC, which matters now that this plugin is the template
for other site admins: the root is a setting, media/originals is the layout this
plugin creates, and both are read from the API. another site's plugin changes the
label.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

manifest.ts

@@ -35,7 +35,7 @@ import type { PluginManifest } from '@@/plugins/manifest';
  */
 export const manifest: PluginManifest = {
   publisher: 'officerdev',
-  version: '2026.08.29.18',
+  version: '2026.08.29.19',
   platform: '>=1.0.0',
 
   label: 'Fofos',