feat: outfits screen with create, select, delete

[jvsena42]

Summary

Add the Outfits tab as the second screen in the app. Users can create outfits by combining wardrobe items, view them in a card list with category-aware thumbnails, and select/delete outfits. Deleting a wardrobe item now cascade-deletes all outfits that contain it.

Changes

• OutfitViewModel (MVI): new shared ViewModel with intents for loading outfits, creating outfits (with item selection + category filtering), toggling selection, and deleting. Loads itemCategories map at init for thumbnail icons.
• OutfitRepository: updated interface and implementation to use Result<T> pattern with runCatching, consistent with WardrobeRepository.
• OutfitsScreen (Android + iOS): full screen with normal header (+ Create button), selection mode (delete button + cancel), empty state (CTA opens create sheet), responsive tablet layout, and 5 previews per platform.
• OutfitCard (Android + iOS): 170dp card with item thumbnail row (category-specific icons from CategoryDropdown drawables/SF Symbols), colored count badge, outfit name, date, and chevron.
• CreateOutfitSheet (Android + iOS): bottom sheet / navigation sheet with outfit name field, category filter chips, item selection grid with photo thumbnails and checkboxes, and gradient save button.
• Tab navigation: wired bottom bar so WARDROBE and OUTFITS tabs switch screens on both platforms.
• Cascade delete: deleting a wardrobe item now removes all outfits containing that item (via getOutfitIdsForItem SQL query + transaction in WardrobeRepositoryImpl).
• Outfits refresh: outfits screen reloads on appear to reflect wardrobe changes.
• Koin DI: registered OutfitRepository and OutfitViewModel in shared module.
• Tests: 14 unit tests for OutfitViewModel (init, load, filter, select, create success/failure, delete success/failure) + updated WardrobeRepositoryImplTest for cascade delete.

Test plan

• Create an outfit from the outfits screen (empty state CTA or header + Create button)
• Verify item thumbnails show correct category icons in outfit cards
• Long-press to select outfits, delete them via confirmation dialog
• Delete a wardrobe item and verify its outfits are removed when switching to Outfits tab
• Filter items by category in the create outfit sheet
• Verify tablet layout renders correctly on both screens
• Run ./gradlew :shared:allTests — all 22 tests pass
• Run ./gradlew detekt — clean

Checklist

• ./gradlew detekt passes
• Tested on Android
• Tested on iOS
• Updated documentation (if applicable)

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