v1.9.0

Added

• Lossless rotation — new Images menu entries Rotate 90° CCW, Rotate 90° CW, Rotate 180°, and Apply EXIF orientation; same buttons in the ImageViewer toolbar between zoom controls and action buttons.
  • JPEG: uses jpegtran (bundled in the PyInstaller executable); raises a RuntimeError shown as a warning dialog if unavailable.
  • Other formats (PNG, TIFF, BMP, WebP): uses Pillow — always lossless.
  • After JPEG rotation the EXIF Orientation tag is stripped via piexif.
  • Apply EXIF orientation is disabled when the selected image has no EXIF orientation tag; enabled/disabled state is kept in sync with the selection.
• Rotation undo — rotation operations are pushed to _undo_stack as ("rotation", [(path, undo_op, orig_orient)]) and undone by the existing Undo button; the button label changes to Undo rotation (N).
• image_ops.py — new module: is_jpeg, get_exif_orientation, set_exif_orientation, _strip_jpeg_orientation, _find_jpegtran, _jpeg_apply, _pil_apply, _pil_save_lossless, rotate_lossless.
• piexif dependency — added to pyproject.toml, environment.yml, and as a PyInstaller hidden import.
• jpegtran in PyInstaller bundle — pbpicat.spec now locates jpegtran via shutil.which at build time and includes it as a binary; _find_jpegtran checks sys._MEIPASS first.
• tools/fix_po_dates.py — normalises POT-Creation-Date and PO-Revision-Date headers to eliminate spurious diffs between locales.
• tools/po_check.py — inspects .po files (statistics, untranslated entries, pattern search) without grepping or calling msgfmt (both break on multi-line entries).
• i18n strings — translated rotation action labels and status messages in all eight locales (de, en, es, fr, it, ru, vi, zh_CN).

Changed

• make translate — now passes --no-location to pybabel extract (removes file/line references from .pot) and runs tools/fix_po_dates.py after pybabel update to keep date headers stable.
• ImageViewer toolbar — rotation buttons (↺ ↻ ↕ EXIF) inserted between zoom controls and action buttons; Apply EXIF orientation button disabled when loaded image has no orientation tag.
• SPEC.md — updated to document lossless rotation actions, their enabled/disabled rules, and the revised ImageViewer toolbar layout.
• README.md — updated to document lossless rotation, Open/Open with actions, keyboard navigation, Renumber from 1, ImageViewer keyboard shortcuts, and the Settings menu restructuring (Catalog configuration vs. Program settings).

Fixed

• Row selection on click after scroll — clicking the Nth visible row (after scrolling) previously selected the Nth row from the top of the list instead of the actual clicked row. Root cause: focusInEvent called selectRow(0) before the click was processed, scrolling the viewport and shifting row coordinates. Fixed by skipping auto-select when event.reason() == MouseFocusReason.