Files
native/locales
Linus Rath 409cdb139e feat: preview images, text and PDFs in the Files tab
Tapping a file in the Files tab downloaded it and went straight to the
Android "Open with" chooser or the iOS share sheet. It now opens the
reader's attachment preview for the types that preview can show, and
hands only the rest to another app, as before.

- `filePreviewKind` (`src/lib/file-preview.ts`) builds on the reader's
  `previewKindFor` and adds source code and config files as text; HTML,
  SVG, images React Native cannot decode and PDFs on Android (no in-app
  renderer) still go to another app
- files over a cap per type (text 512 KB, .eml 10 MB, images 25 MB,
  PDFs 50 MB) open in another app instead; when a node has no size,
  the downloaded file is checked
- the preview downloads the file once, with the same authenticated
  download as Download, into a temp folder of its own; Open with, Share
  and Download reuse that copy, so they work without another fetch
- the folder is deleted when the preview closes, or left to the
  stale-export sweep, which now also clears preview folders, once
  another app got the file
- the per-file menu offers Preview and "Open with…" instead of the
  combined "Preview / Share"
- the shared preview gains a header Open button, an optional Download
  button, labels on its icon buttons and a fallback when an image does
  not decode; the .eml parsing moves into `emlPreviewFromBytes`, which
  the reader uses too
2026-09-24 19:28:37 +02:00
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