- GET /api/files/{id}/preview: an allow-list on the stored extension (downloads/preview.py) picks
image / PDF / text; served inline under `CSP: sandbox; frame-ancestors 'self'`, the type from the
table; HTML and SVG arrive as plain text; a text is its first 1 MiB (X-Preview-Truncated), sent
as UTF-8 whatever it was written in (BOM, UTF-8, else cp1250); a NUL means binary: 415
- the list says which preview each file gets (asset.preview); FE/BE contract on kinds and header
- the viewer (shared dialog shell): ← / → through the list's such files in its order, Save, open in
a tab, the file's menu; one stage height for every kind; a no-preview card offers the file
- the name, the card's picture and the menu's Preview open it; an image up to 8 MB is its own
thumbnail
- Own folders are made, renamed and deleted from the rail (right click, long press,
Shift+F10) or the "…" beside an open folder's name; any folder's retention is a
submenu (7/30/90 days, until deleted). Deleting confirms where its files go.
- List or grid per folder, sharing one sort; the grid is the one media card.
- A file dropped anywhere on the page opens Upload with it, bound for the folder
on screen.
- A link (?item=) or the upload notice opens Files on the file: its page turned
to, the keyboard on it, a ring round it.
- An in-place name field left by Enter or Escape hands the focus back to what
replaced it (the row, the entry, the "…") instead of dropping it on <body>.
- The table's saved page size is per account.
peter