feat: added ability to preserve exif metadata, fixed a quality slider…

[CodeDead]

… display issue

[Copilot]

Pull request overview

Adds an option to preserve EXIF metadata during image compression and fixes the JPEG quality slider value display, wiring the new setting through the UI → settings persistence → compression pipeline.

Changes:

• Add “Preserve EXIF data” setting (UI toggle, persisted in config.json, and passed into compression).
• Implement EXIF extraction/re-injection for supported output formats using img-parts.
• Fix quality slider to reflect the current JPEG quality value (instead of always starting at 100).

Reviewed changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/views/settings_view.rs	Adds the new “Preserve EXIF data” checkbox to Settings UI.
src/views/main_view.rs	Fixes initial quality slider value to use state.quality for JPEG.
src/services/image_service.rs	Extracts EXIF from source and re-injects into output via img-parts.
src/models/language.rs	Adds localized string key for the new setting label.
src/components/settings.rs	Adds preserve_exif to persisted settings with default value.
src/components/app.rs	Wires new toggle message + passes preserve_exif into compression task; adjusts settings window height.
languages/*.json	Adds preserveExifData translations for all embedded languages.
README.md	Documents metadata preservation feature and new dependency.
Cargo.toml	Adds img-parts dependency; bumps rust-version.
Cargo.lock	Locks img-parts and transitive dependency updates.

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