feat: default outfit name from item names

[jvsena42]

Summary

Closes #43. Saving an outfit without a name previously blocked the save button; now the name is optional and an unnamed outfit falls back to its item names joined by " + " (e.g. Black T-Shirt + Navy Jeans).

The fallback lives in OutfitRepositoryImpl rather than in either UI, so Android and iOS share one implementation — consistent with the project's MVI + Repository split where business logic belongs in repository implementations.

Changes

• Add getNamesByIds to ClothingItem.sq — one query for all selected items instead of one row read per item. Guarded against empty collections, since SQLDelight expands IN ? to IN (), which SQLite rejects.
• Add resolveName() to OutfitRepositoryImpl, applied in both createOutfit and updateOutfit, so clearing the name while editing regenerates it. Names follow the selection order; ids with no matching row are skipped.
• Drop the blank-name guard in OutfitViewModel.createOutfit — at least one selected item is still required.
• Enable the save button on item selection alone (Compose + SwiftUI) and mark the name hint optional in all four string files (en / pt-BR × Android / iOS).
• Truncate outfit card titles to one line on both platforms, since a generated name concatenates every item.
• Update the create-first-outfit journey wording to match the new hint.
• New OutfitRepositoryImplTest (name preserved, blank/whitespace fallback, selection ordering, missing ids, update path) and two new OutfitViewModelTest cases (blank-name pass-through, empty-selection guard).

Test plan

• ./gradlew :shared:allTests and ./gradlew :shared:testAndroidHostTest pass
• ./gradlew :composeApp:assembleDebug builds
• Manual: Outfits → create outfit → select 2+ items → leave the name empty → save; the card title reads Item A + Item B
• Manual: open that outfit → edit → clear the name → save; the name regenerates from the current selection
• Manual: create an outfit with a typed name; the typed name is kept verbatim

Checklist

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

Note: the iOS simulator test task is skipped on Linux and the Swift changes are unbuilt here — they need Xcode to verify.

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