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Ed Zynda d27022bcfb feat(ui): render half-block thumbnails for attached images (#47)
* feat(ui): render half-block thumbnails for attached images (#46)

- Add internal/ui/imagepreview package: Render() draws low-res
  thumbnails using Unicode half-blocks (▀) + truecolor/256-color SGR,
  which survives tmux/zellij (no graphics protocol)
- Cache a rendered thumbnail per pending clipboard image in the input
  component; render once at attach time, never per frame
- Fall back to the existing [N image(s) attached] text pill when the
  terminal lacks truecolor/256-color support
- Document Ctrl+V paste, Ctrl+U clear, and the preview in the docs
  site and README keyboard shortcuts

Fixes #46

* fix(ui): render image thumbnails off the event loop and cap size

- Render thumbnails asynchronously via a tea.Cmd instead of calling
  the decode + resample path synchronously inside Update(), which
  blocked the Bubble Tea event loop
- Add thumbnailReadyMsg + an imageGen generation counter so async
  results land on the correct pendingImages slot and stale renders
  after a clear/re-attach are discarded
- Guard imagepreview.Render against decompression bombs by checking
  DecodeConfig dimensions against a max before full decode

* fix(ui): skip image preview when input width is too small

- Return 0 from thumbCols when width <= 6 so a full-size thumbnail is
  no longer rendered for tiny or uninitialized (width 0) terminals;
  the caller falls back to the text pill
2026-06-04 14:36:39 +03:00
..
2026-03-19 17:29:35 +03:00