EXIF support and display in the right panel.
New features:
- Extract basic metadata (filename, format, resolution, file size, color type)
- Parse EXIF data (camera, date, exposure, aperture, ISO, focal length, GPS)
- Display metadata in collapsible right panel (toggle with 'i' key)
- Auto-refresh metadata on document navigation
Changes by file:
Cargo.toml, Cargo.lock:
- Add kamadak-exif dependency for EXIF parsing
i18n/en/noctua.ftl:
- Add translation strings for all metadata labels
src/app/document/meta.rs:
- New module for metadata types (BasicMeta, ExifMeta, DocumentMeta)
- Extraction logic with EXIF parsing via kamadak-exif
- Helper methods for formatted display (resolution, file size, camera, GPS)
src/app/document/mod.rs:
- Re-export meta module
src/app/document/{raster,vector,portable}.rs:
- Add extract_metadata() method stubs (full impl for raster)
src/app/document/file.rs:
- Reset metadata on document change
src/app/message.rs:
- Add ToggleRightPanel and RefreshMetadata messages
src/app/model.rs:
- Add metadata: Option<DocumentMeta> field
- Add show_right_panel: bool field
src/app/update.rs:
- Handle panel toggle and metadata refresh
- Auto-refresh metadata on navigation when panel visible
src/app/view/panels.rs:
- Implement right_panel() with metadata display
- Conditional sections for basic info and EXIF data
src/app/view/canvas.rs:
- Integrate right panel into layout"
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