refactor: 프론트엔드 리펙토링

docs/architecture/frontend-application-foundation.md

@@ -105,6 +105,39 @@ Central installed catalogs are aggregation points only:
 Feature-specific composition belongs under the feature itself. Central
 catalogs must not grow feature-specific branching logic.
 
+Adapter contributions declare the platform capabilities they consume through
+`needs`. The generic contribution seam in
+`src/features/feature-adapter-contribution.ts` derives the context from that
+list, so an HTTP-only feature cannot reach IndexedDB and an IndexedDB-only
+feature does not receive the HTTP executor. It also binds
+`featureId -> ApplicationFeatureInputs[featureId]` at the contribution
+definition site instead of recovering that relationship with a final catalog
+cast.
+
+A contribution becomes composable only through
+`defineFeatureAdapterContribution()`. That factory adds the private
+contribution brand required by `composeFeatureAdapterInputs()`; a raw object
+with the same visible fields is rejected by TypeScript and checked again at
+runtime. The negative type fixture
+`invalid-direct-feature-composition.ts` is part of FE-GATE-003 so this
+authority cannot be bypassed by calling the composer directly.
+
+For IndexedDB-backed features, `createIndexedDbRepositoryProvider()` is the
+composition helper that maps feature-owned repository identities to typed
+`IndexedDbRepositoryPort` instances. It does not create a universal storage
+repository or move dataset/migration/lifecycle policy into the feature.
+
+The repository now has two executable contribution shapes:
+
+- Reference feature: `needs: ["http"]`
+- Local Draft feature: `needs: ["indexedDb"]`
+
+Local Draft is a compiled architecture consumer used to prove the second
+capability shape; it is not added to the default product manifest. Its
+browser-capability test composes the feature over the real
+`createIndexedDbRuntime` and native IndexedDB, proving that this seam is not
+limited to an in-memory contract fixture.
+
 ## Presentation consumer surface
 
 `ApplicationProvider` remains the composition root for presentation, but new