chore(lint): SwiftLint-Config + 0-Warnings-Pass + Swift-6-Concurrency-Fixes

Bringt cards-native auf 0 SwiftLint-Violations bei 75 Files. Build-Status
unverändert grün (xcodebuild iOS Debug).

.swiftlint.yml
- identifier_name excludes erweitert um math/index-Konventionen
  (i, j, n, m, x, y, w, h, r, g, b, a, c, d, s, f, p, q, t, l) —
  in algorithmischem Code klarer als verbose
- opening_brace disabled — kollidiert mit SwiftFormats
  wrapMultilineStatementBraces (SwiftFormat ist im Pre-Commit-Hook
  und gewinnt)

Code-Modernisierungen (real, nicht nur Annotations)
- Cloze.swift: regex-Tuple bekommt `swiftlint:disable large_tuple`-
  Region — Regex-Output-Type ist Builder-bedingt nicht reduzierbar
- Media.swift: `data(using: .utf8)` → `Data(s.utf8)` (non-failable),
  `String(data:as:)` → `String(bytes:encoding:)`
- CardsTheme.swift: HSL-Wert-Typ statt anonymes 3-Tupel —
  konkretere Call-Sites, kein `large_tuple`-Warning mehr
- MediaCache.swift: `CacheEntry`-Struct statt 3-Tupel im Prune-Pfad
- GradeQueue / MediaCache / StudySession / MarketplaceStore: OSLog-
  Interpolations auf lokale Variablen ziehen — fixt Swift-6-Strict-
  Concurrency-Fail bei Actor-isolated-Property-Zugriff aus
  @Sendable-Autoclosure
- DeckMutations.swift, MarketplaceModeration.swift: verschachtelte
  VersionInfo-Sub-Types auf Top-Level (`PullUpdateVersion`,
  `OwnedMarketplaceVersion`) — fixt `nesting`-Warning
- Tests/UnitTests/*.swift: alle `""".data(using: .utf8)!` migriert auf
  `Data("""…""".utf8)`; force-cast `as!` in MutationEncodingTests
  durch guard-let + throw ersetzt

Pragmatische Disables (mit Doc-Comment-Begründung)
- DeckEditorView / MarketplacePublishView / DeckDetailView /
  PublicDeckView / DeckListView / CardEditorView / CardsAPI:
  `swiftlint:disable type_body_length` (+ teilweise file_length)
  als Region-Disable mit `enable` nach dem Struct. Begründung im
  Doc-Comment: Multi-State-Maschinen mit shared Toolbar + Sheets;
  Aufspalten würde nur @Binding-Plumbing produzieren

Auto-Format-Aufräumung
- Redundante `Sendable`-Conformance entfernt (Swift 6 leitet das
  bei Wert-Typen mit Sendable-Mitgliedern automatisch ab)
- EnvironmentValues nutzt jetzt @Entry-Macro statt manueller
  EnvironmentKey-Boilerplate
- Brace-Reformatting + Import-Sortierung auf allen 75 Files

Ergebnis: 80 Warnings + 3 Errors → 0 / 0.

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

Sources/Core/Domain/Card.swift

@@ -2,7 +2,7 @@ import Foundation
 
 /// Card-DTO. Wire-Format aus `cards/apps/api/src/lib/dto.ts:toCardDto`
 /// und `cards/packages/cards-domain/src/schemas/card.ts`.
-struct Card: Codable, Identifiable, Hashable, Sendable {
+struct Card: Codable, Identifiable, Hashable {
     let id: String
     let deckId: String
     let userId: String
@@ -29,7 +29,7 @@ struct Card: Codable, Identifiable, Hashable, Sendable {
 /// Card-Type-Enum. Vollständig aus `CardTypeSchema`. In β-2 rendern
 /// wir nur `basic`, `basic-reverse`, `cloze`. Die anderen Types
 /// kommen in β-3 und β-4 dazu, sind aber jetzt schon decodierbar.
-enum CardType: String, Codable, Sendable, CaseIterable {
+enum CardType: String, Codable, CaseIterable {
     case basic
     case basicReverse = "basic-reverse"
     case cloze
@@ -43,7 +43,7 @@ enum CardType: String, Codable, Sendable, CaseIterable {
 /// Server liefert nur 4 Felder (id, deckId, type, fields) als Drizzle-
 /// Joined-Subset — Achtung: `deckId` hier in **camelCase**, nicht
 /// snake_case wie sonst.
-struct ReviewCard: Codable, Hashable, Sendable {
+struct ReviewCard: Codable, Hashable {
     let id: String
     let deckId: String
     let type: CardType

Sources/Core/Domain/CardMutations.swift

@@ -10,7 +10,7 @@ import Foundation
 /// - multiple-choice: `front`, `answer`
 /// - image-occlusion: `image_ref`, `mask_regions` (β-4)
 /// - audio-front: `audio_ref`, `back` (β-4)
-struct CardCreateBody: Encodable, Sendable {
+struct CardCreateBody: Encodable {
     let deckId: String
     let type: CardType
     let fields: [String: String]
@@ -26,7 +26,7 @@ struct CardCreateBody: Encodable, Sendable {
 
 /// Body für `PATCH /api/v1/cards/:id`. Nur `fields` und `media_refs` —
 /// Type und deck_id sind immutable (Server-Schema).
-struct CardUpdateBody: Encodable, Sendable {
+struct CardUpdateBody: Encodable {
     var fields: [String: String]?
     var mediaRefs: [String]?
 

Sources/Core/Domain/Cloze.swift

@@ -12,12 +12,18 @@ import Foundation
 /// 1-basierte Cluster-ID. Mehrere Cluster pro Karte → mehrere
 /// Sub-Index-Reviews.
 enum Cloze {
+    // swiftlint:disable large_tuple
+
     /// Pattern für `{{cN::answer(::hint)?}}`. Pro Call konstruiert,
     /// weil `Regex` unter Strict-Concurrency nicht Sendable ist.
+    /// Tuple-Output (whole-match, id, answer, hint?) ist Regex-Builder-
+    /// bedingt — Lint-Regel `large_tuple` greift hier nicht.
     private static var clusterPattern: Regex<(Substring, Substring, Substring, Substring?)> {
         #/\{\{c(\d+)::([^}]*?)(?:::([^}]*?))?\}\}/#
     }
 
+    // swiftlint:enable large_tuple
+
     /// Distinct Cluster-IDs, sortiert.
     static func extractClusterIds(_ text: String) -> [Int] {
         var ids = Set<Int>()

Sources/Core/Domain/Deck.swift

@@ -2,7 +2,7 @@ import Foundation
 
 /// Deck-DTO. Wire-Format aus `cards/apps/api/src/lib/dto.ts:toDeckDto`.
 /// snake_case-Felder via `CodingKeys`, Optionals explizit nullable.
-struct Deck: Codable, Identifiable, Hashable, Sendable {
+struct Deck: Codable, Identifiable, Hashable {
     let id: String
     let userId: String
     let name: String
@@ -41,14 +41,14 @@ struct Deck: Codable, Identifiable, Hashable, Sendable {
     }
 }
 
-enum DeckVisibility: String, Codable, Sendable {
+enum DeckVisibility: String, Codable {
     case `private`
     case space
     case `public`
 }
 
 /// Aus `cards/packages/cards-domain/src/schemas/deck.ts:DECK_CATEGORY_IDS`.
-enum DeckCategory: String, Codable, Sendable, CaseIterable {
+enum DeckCategory: String, Codable, CaseIterable {
     case language
     case medicine
     case science
@@ -82,7 +82,7 @@ enum DeckCategory: String, Codable, Sendable, CaseIterable {
 /// FSRS-Settings — Native bleibt schematisch agnostisch, FSRS rechnet
 /// nur der Server. Wir behalten die Felder als roh-JSON, damit eine
 /// neue Setting auf dem Server uns nicht bricht.
-struct FsrsSettings: Codable, Sendable, Hashable {
+struct FsrsSettings: Codable, Hashable {
     let requestRetention: Double?
     let maximumInterval: Int?
     let enableFuzz: Bool?
@@ -114,23 +114,23 @@ struct FsrsSettings: Codable, Sendable, Hashable {
 }
 
 /// Server-Response von `GET /api/v1/decks`.
-struct DeckListResponse: Decodable, Sendable {
+struct DeckListResponse: Decodable {
     let decks: [Deck]
     let total: Int
 }
 
 /// Server-Response von `GET /api/v1/cards?deck_id=...`.
-struct CardListResponse: Decodable, Sendable {
+struct CardListResponse: Decodable {
     let cards: [Card]
     let total: Int
 }
 
 /// Server-Response von `GET /api/v1/reviews/due?deck_id=...`.
-struct DueReviewsResponse: Decodable, Sendable {
+struct DueReviewsResponse: Decodable {
     let total: Int
 }
 
 /// Server-Response von `GET /api/v1/decks/:deckId/distractors`.
-struct DistractorsResponse: Decodable, Sendable {
+struct DistractorsResponse: Decodable {
     let distractors: [String]
 }

Sources/Core/Domain/Marketplace.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 /// Browse-Eintrag aus `/api/v1/marketplace/decks` und `.../explore`.
-struct PublicDeckEntry: Codable, Hashable, Sendable, Identifiable {
+struct PublicDeckEntry: Codable, Hashable, Identifiable {
     let slug: String
     let title: String
     let description: String?
@@ -16,7 +16,9 @@ struct PublicDeckEntry: Codable, Hashable, Sendable, Identifiable {
     let createdAt: Date
     let owner: PublicDeckOwner
 
-    var id: String { slug }
+    var id: String {
+        slug
+    }
 
     enum CodingKeys: String, CodingKey {
         case slug, title, description, language, category, license
@@ -29,10 +31,12 @@ struct PublicDeckEntry: Codable, Hashable, Sendable, Identifiable {
         case owner
     }
 
-    var isPaid: Bool { priceCredits > 0 }
+    var isPaid: Bool {
+        priceCredits > 0
+    }
 }
 
-struct PublicDeckOwner: Codable, Hashable, Sendable {
+struct PublicDeckOwner: Codable, Hashable {
     let slug: String
     let displayName: String
     let verifiedMana: Bool
@@ -62,19 +66,19 @@ struct PublicDeckOwner: Codable, Hashable, Sendable {
 }
 
 /// Response von `GET /api/v1/marketplace/explore`.
-struct ExploreResponse: Decodable, Sendable {
+struct ExploreResponse: Decodable {
     let featured: [PublicDeckEntry]
     let trending: [PublicDeckEntry]
 }
 
 /// Response von `GET /api/v1/marketplace/decks`.
-struct BrowseResponse: Decodable, Sendable {
+struct BrowseResponse: Decodable {
     let items: [PublicDeckEntry]
     let total: Int
 }
 
 /// Vollständiges Public-Deck aus `GET /api/v1/marketplace/decks/:slug`.
-struct PublicDeck: Codable, Hashable, Sendable, Identifiable {
+struct PublicDeck: Codable, Hashable, Identifiable {
     let id: String
     let slug: String
     let title: String
@@ -100,7 +104,7 @@ struct PublicDeck: Codable, Hashable, Sendable, Identifiable {
     }
 }
 
-struct PublicDeckVersion: Codable, Hashable, Sendable, Identifiable {
+struct PublicDeckVersion: Codable, Hashable, Identifiable {
     let id: String
     let deckId: String
     let semver: String
@@ -123,7 +127,7 @@ struct PublicDeckVersion: Codable, Hashable, Sendable, Identifiable {
 }
 
 /// Response von `GET /api/v1/marketplace/decks/:slug`.
-struct PublicDeckDetail: Decodable, Sendable {
+struct PublicDeckDetail: Decodable {
     let deck: PublicDeck
     let latestVersion: PublicDeckVersion?
     let owner: PublicDeckOwner?
@@ -136,7 +140,7 @@ struct PublicDeckDetail: Decodable, Sendable {
 }
 
 /// Response von `POST /api/v1/marketplace/decks/:slug/subscribe`.
-struct SubscribeResponse: Decodable, Sendable {
+struct SubscribeResponse: Decodable {
     let subscribed: Bool
     let deckSlug: String
     let currentVersionId: String?
@@ -151,7 +155,7 @@ struct SubscribeResponse: Decodable, Sendable {
 }
 
 /// Browse-Sort-Optionen aus `BrowseQuerySchema`.
-enum MarketplaceSort: String, Sendable, CaseIterable {
+enum MarketplaceSort: String, CaseIterable {
     case recent
     case popular
     case trending

Sources/Core/Domain/Media.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 /// Response von `POST /api/v1/media/upload`.
-struct MediaUploadResponse: Decodable, Sendable {
+struct MediaUploadResponse: Decodable {
     let id: String
     let url: String
     let mimeType: String
@@ -19,7 +19,7 @@ struct MediaUploadResponse: Decodable, Sendable {
     }
 }
 
-enum MediaKind: String, Codable, Sendable {
+enum MediaKind: String, Codable {
     case image
     case audio
     case video
@@ -29,7 +29,7 @@ enum MediaKind: String, Codable, Sendable {
 /// Image-Occlusion-Mask-Region.
 /// `mask_regions`-Feld ist ein JSON-Array-**String** in `fields`,
 /// nicht ein Object — Server-Schema-Constraint (`fields: Record<string,string>`).
-struct MaskRegion: Codable, Hashable, Sendable, Identifiable {
+struct MaskRegion: Codable, Hashable, Identifiable {
     let id: String
     let x: Double // 0..1 relativ
     let y: Double
@@ -53,7 +53,7 @@ enum MaskRegions {
     /// Bei Parse- oder Schema-Fehler: leere Liste. Sortiert nach ID
     /// (lexikographisch, gleich wie Server-Sortierung).
     static func parse(_ json: String) -> [MaskRegion] {
-        guard let data = json.data(using: .utf8) else { return [] }
+        let data = Data(json.utf8)
         guard let regions = try? JSONDecoder().decode([MaskRegion].self, from: data) else { return [] }
         return regions.sorted { $0.id < $1.id }
     }
@@ -73,8 +73,10 @@ enum MaskRegions {
     static func encode(_ regions: [MaskRegion]) -> String {
         let encoder = JSONEncoder()
         encoder.outputFormatting = [.sortedKeys]
-        guard let data = try? encoder.encode(regions) else { return "[]" }
-        return String(decoding: data, as: UTF8.self)
+        guard let data = try? encoder.encode(regions),
+              let json = String(bytes: data, encoding: .utf8)
+        else { return "[]" }
+        return json
     }
 }
 
@@ -88,7 +90,7 @@ extension CardFieldsBuilder {
     ) -> [String: String] {
         var fields: [String: String] = [
             "image_ref": imageRef,
-            "mask_regions": MaskRegions.encode(regions),
+            "mask_regions": MaskRegions.encode(regions)
         ]
         if let note, !note.isEmpty {
             fields["note"] = note

Sources/Core/Domain/Review.swift

@@ -2,7 +2,7 @@ import Foundation
 
 /// Rating-Werte für `POST /reviews/:cardId/:subIndex/grade`.
 /// Aus `cards/packages/cards-domain/src/schemas/review.ts:RatingSchema`.
-enum Rating: String, Codable, Sendable, CaseIterable {
+enum Rating: String, Codable, CaseIterable {
     case again
     case hard
     case good
@@ -30,7 +30,7 @@ enum Rating: String, Codable, Sendable, CaseIterable {
 }
 
 /// FSRS-Review-State. Aus `ReviewStateSchema`.
-enum ReviewState: String, Codable, Sendable {
+enum ReviewState: String, Codable {
     case new
     case learning
     case review
@@ -38,7 +38,7 @@ enum ReviewState: String, Codable, Sendable {
 }
 
 /// Review-DTO. Wire-Format aus `cards/apps/api/src/routes/reviews.ts:toReviewDto`.
-struct Review: Codable, Hashable, Sendable {
+struct Review: Codable, Hashable {
     let cardId: String
     let subIndex: Int
     let userId: String
@@ -71,11 +71,13 @@ struct Review: Codable, Hashable, Sendable {
 }
 
 /// Eintrag aus `/reviews/due?deck_id=X` — Review + zugehörige Card.
-struct DueReview: Codable, Hashable, Sendable, Identifiable {
+struct DueReview: Codable, Hashable, Identifiable {
     let review: Review
     let card: ReviewCard
 
-    var id: String { "\(review.cardId)-\(review.subIndex)" }
+    var id: String {
+        "\(review.cardId)-\(review.subIndex)"
+    }
 
     init(from decoder: Decoder) throws {
         let container = try decoder.container(keyedBy: CodingKeys.self)
@@ -96,13 +98,13 @@ struct DueReview: Codable, Hashable, Sendable, Identifiable {
 }
 
 /// Wrapper-Response von `GET /api/v1/reviews/due?deck_id=X`.
-struct DueReviewsListResponse: Decodable, Sendable {
+struct DueReviewsListResponse: Decodable {
     let reviews: [DueReview]
     let total: Int
 }
 
 /// Body für `POST /reviews/:cardId/:subIndex/grade`.
-struct GradeReviewBody: Encodable, Sendable {
+struct GradeReviewBody: Encodable {
     let rating: Rating
     let reviewedAt: Date
 

Sources/Core/Domain/Typing.swift

@@ -5,7 +5,7 @@ import Foundation
 /// Normalisierung (lowercase, trim, NFD-Diakritika-Stripping),
 /// dann exact-match → `correct`. Sonst Levenshtein-Distanz mit
 /// Threshold `max(1, floor(answer.length * 0.2))` → `close`.
-enum TypingMatch: Sendable, Equatable {
+enum TypingMatch: Equatable {
     case correct
     case close
     case wrong