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feat(files): a file that is not media opens in a viewer — an image, a PDF, text as text

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- 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
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peter
2026-10-12 15:28:31 +02:00
parent 6707550513
commit fb8fb980e5
26 changed files with 1090 additions and 48 deletions
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docs/DESIGN.md
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@@ -779,3 +779,4 @@ of a full-width panel and nothing on the right.
| 2026-10-11 | Running downloads | An app-wide tray, bottom right, shown only while something runs or failed (reason + retry), foldable to a pill | A rail icon with a count and a popover | Downloading became an action you start anywhere; a running one must be visible without going to look |
| 2026-10-11 | Download done | The notification says whether it plays on a phone and carries Link másolása + Megnyitás (the folder, the item focused); never an automatic jump | A plain "ready" notice; auto-navigation to the item | The daily path is paste → done → copy the link; a jump would pull the user out of what they were doing |
| 2026-10-11 | Library row quick icons (owner A) | On a wide list only the ⋯ holds a place; Copy link, Share and Save come up over the date while the row is hovered or holds the keyboard; a card (phone) keeps them in its own line; Keeps narrower | Three icons always in sight (the name kept ~150px at 1200); dropping Added below 64rem | Owner: the name is what a row is read by; every action stays in the ⋯ and the right-click menu |
| 2026-10-12 | Files preview (owner ★) | A file that is not media opens from its name in the dialog shell, wide: an image, a PDF in the browser's own viewer, text as numbered plain text (HTML and SVG too) with a wrap toggle, else a no-preview card with Save; ← / → page the list's such files in its order; an image under 8 MB is its own thumbnail | A side panel beside the list; a new browser tab; pdf.js; syntax highlighting; a click that saves a file without a preview | Owner: one way to open anything, paged like the list; the browser's PDF viewer is free and isolated; a page is never rendered on our origin |