Phase 5: Föderations-Endpunkte — Cards ist föderierter Peer

Endpoints (alle Pfade aus app-manifest.json):
- POST /api/v1/share/receive — User-JWT-Auth, ShareEnvelope-Strict-
  Validation (cross-user-forbidden), Recipient-Match, Type-Accept-
  Lookup über Manifest, Payload-Schema-Validation, Handler-Dispatch
- POST /api/v1/tools/:name — User-JWT, dispatch nach `cards.create`
  und `cards.search` mit Tool-Schemas aus @cards/domain
- GET /api/v1/search — User-JWT, ILIKE auf cards.fields jsonb +
  decks.name, baut SearchResultEnvelope für mana-search-Aggregator
- GET /api/v1/dsgvo/export?user_id=… — Service-Key, voll-Bundle aller
  Cards-Daten des Users (decks, cards, reviews, study_sessions, tags,
  media_refs, import_jobs)
- POST /api/v1/dsgvo/delete — Service-Key, kaskadiert via FK-Cascade
  decks → cards → reviews/media_refs/card_tags/tags/study_sessions
  plus separates Cleanup von import_jobs

Share-Handlers (apps/api/src/share-handlers/):
- create_card_from_quote (mana/quote → front=text, back=source)
- save_link_as_card (mana/url → front=title, back=url+description)
- create_card_from_text (mana/text → front=erste-zeile, back=rest)
Alle landen via ensureInboxDeck() in einem auto-erstellten "Inbox"-Deck
pro User, inklusive automatischer FSRS-Reviews-Init in Transaktion.

Lokales Protocol-Mirror in @cards/domain/src/protocol/ (envelope,
payloads, search): TEMPORARY-Markierung mit Swap-Plan auf
@mana/shared-share-protocol via Verdaccio sobald NPM_AUTH_TOKEN da ist.
Spec-strict — UUID für user_id, ULID für share_id, Crockford-Base32.

Service-Key-Middleware mit constant-time-Compare gegen
process.env.CARDS_DSGVO_SERVICE_KEY (Phase F-1: ersetzt durch
mana-auth.app_service_keys-Lookup).

Tests:
- 70 Vitest-Tests grün (27 cards-domain + 43 apps/api):
  - share.test.ts: Auth-Gate, Cross-User-Sperre, User-Mismatch (403),
    Wrong-Recipient (422), Unknown-Type (422), Invalid-Payload (422),
    Wrapped { envelope, delivery_token }-Body akzeptiert
  - tools.test.ts: Auth, Unknown-Tool (404), cards.create-Validation,
    cards.search-Envelope-Shape
  - search.test.ts: Auth, Missing-Query (422), Query-too-long (422),
    Envelope-Version 0.1 + envelope-Felder
  - dsgvo.test.ts: Service-Key-Gate (401), Missing-User-ID (400),
    Export-Bundle-Shape, Delete-Counts, Key-not-configured (500)
- pnpm run type-check ✅ 4/4 packages
- E2E-Smoke gegen Postgres: Quote-Share→Inbox-Deck→Karte→Search-Hit→
  DSGVO-Export+Delete-Roundtrip clean (alle 3 Tabellen 0 nach delete)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.env.example

@@ -34,3 +34,11 @@ NPM_AUTH_TOKEN=
 
 # === MinIO (über mana-media) ===
 CARDS_MEDIA_BUCKET=cards-storage
+
+# === DSGVO Service-Key ===
+# X-Service-Key-Wert, mit dem mana-admin DSGVO-Export/Delete-Calls
+# autorisiert. In Prod aus mana-auth.app_service_keys.
+CARDS_DSGVO_SERVICE_KEY=msk_dev_change_me_dsgvo
+
+# === Public-URL für Deep-Links in Share-Handlers + Search-Hits ===
+CARDS_PUBLIC_URL=http://localhost:3082