[regendorf-ux]

What this changes

edit.image-crop was partial ("for added images: trim each side, clipped"). Images already on the
page can now be cropped too:

• ImageChange::Crop([f64; 4]) (edit/src/images.rs): the part to keep, in user space, becomes a
  m l l l h W n clipping path - the box's corners mapped by the inverse of the scope's matrix - placed
  just inside the scope that holds the image (the private-crop scope from Resize exclusive image crops across nested states and content streams #1269), or a new q … Q
  around the Do. A clipping path already at the scope's start (the picture's earlier crop) is
  replaced, so a crop can grow back. The pixels are never scaled, and a later move or resize wraps the
  scope, so the crop travels with the picture.
• Engine ImageEdit::Crop (undo label "Crop image"); tool image_edit action crop with rect
  (top-left-origin points, the part to keep).
• Window (edit_text_ui.rs): right-click a selected picture ▸ Crop Image puts it in crop mode
  (CropMode, exported): eight handles trim (the inside pans), the part that goes is dimmed, Enter or
  Done applies, Esc or Cancel leaves; Remove Crop (enabled when the picture is cropped) shows the whole
  picture again.
• Rows for the three new labels in all 21 languages, with their checksums in ATTRIBUTION.toml; parity
  edit.image-crop → shipped, with what is still missing.

How you verified it

Re-run on 2026-10-14 at 9beb327, after merging main at v0.8.0 (9931329) into the branch:

• cargo fmt --all --check
• cargo clippy --workspace --all-targets -- -D warnings: clean
• cargo nextest run --workspace -E 'package(pdfcraft-automation) | package(pdfcraft-edit) | package(pdfcraft-engine) | package(pdfcraft-ui-egui)' (every test of the crates this PR changes): 1677 run, 1677 passed
• cargo xtask assets, cargo xtask parity and cargo xtask layers: ok

Running every ui-egui test caught primary_ui_fonts_cover_latin_and_cyrillic_catalogs failing: the Bulgarian crop hint used "ѝ", which JetBrains Mono lacks. The hint is reworded without it (9beb327).

Tests. New behaviour, so the tests exercise APIs this PR adds. cropping_an_existing_image_clips_it_and_moves_with_it
(engine): the crop clips the rendered picture, a later move carries the crop, cropping again can grow it
back, and a box with no area is refused. cropping_a_picture_with_its_handles (ui-egui):
dragging the bottom-right handle and pressing Enter crops; Esc leaves crop mode without a change.
editing_page_images_through_tools (automation) gains a crop step.

Anything a reviewer should look at first

• The labels in the 20 non-English language files were written by an AI model from the English
  wording; a native speaker's review of those rows would be welcome.
• The Properties panel gets no Crop… button here: the right-click menu is the way in. A button there
  belongs with a larger Properties change.
• Not done: handles for added images (they keep their % fields), and a clip shared by several objects in
  the original file is left as it is.
• Overlap with feat: Acrobat UI parity for image editing, text formatting, and UI stabilization and Bug Fixes #2155 (opened after this one, +3739 lines): among its many changes it adds a 4-point
  image-specific interactive crop in the same files (edit/src/images.rs, edit_text_ui.rs). This PR is
  only the crop: ImageChange::Crop with its edit, tool and handles, tested on its own. Whichever you
  prefer is fine; if feat: Acrobat UI parity for image editing, text formatting, and UI stabilization and Bug Fixes #2155's crop lands first I'll rebase this down to what it adds, or close it.

Never-crash

• No new unwrap/expect/panic! outside tests
• The crop box must be finite (|v| ≤ 1e12) and have area; a placement that cannot be inverted is refused
• No unsafe

Provenance

• No asset added beyond translation rows; behaviour from ISO 32000's clipping paths and black-box
  observation of Acrobat's crop handles

Security

• No network access

Parity and reach

• parity/acrobat-features.toml updated with what is still missing
• Headless through image_edit action crop
• No documented behaviour changed

🤖 Generated with Claude Code

[echelon]

Thank you @regendorf-ux for cropping existing page images with handles! It's merged into main now.

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