chore(repo): iOS-App als ios/ ins Hauptrepo uebernehmen

Calendarr-IOS wird mit vollstaendiger Historie als Unterverzeichnis
ios/ eingebunden. Damit liegen Server, Web, Android und iOS in einem
gemeinsamen Repo.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

ios/CalendarrWatchComplications/WatchCalendarSelectionIntent.swift

@@ -0,0 +1,44 @@
+import AppIntents
+import WidgetKit
+import CalendarrCore
+
+/// One calendar option in a complication's configuration.
+struct WatchCalendarEntity: AppEntity, Identifiable {
+    let id: String
+    let name: String
+
+    static var typeDisplayRepresentation: TypeDisplayRepresentation = "Kalender"
+    static var defaultQuery = WatchCalendarEntityQuery()
+
+    var displayRepresentation: DisplayRepresentation {
+        DisplayRepresentation(title: LocalizedStringResource(stringLiteral: name))
+    }
+}
+
+/// Reads the calendars from this watch's App Group container, so configuration
+/// needs no network call and no phone.
+struct WatchCalendarEntityQuery: EntityQuery {
+    func entities(for identifiers: [String]) async throws -> [WatchCalendarEntity] {
+        let wanted = Set(identifiers)
+        return SnapshotStore().readCalendars()
+            .filter { wanted.contains($0.id) }
+            .map { WatchCalendarEntity(id: $0.id, name: $0.name) }
+    }
+
+    func suggestedEntities() async throws -> [WatchCalendarEntity] {
+        SnapshotStore().readCalendars().map { WatchCalendarEntity(id: $0.id, name: $0.name) }
+    }
+}
+
+/// Per-complication override of the calendar selection. The in-app toggles are
+/// the primary path — intent configuration on a watch face is awkward to
+/// operate — so an empty selection means "whatever the app is set to".
+struct WatchCalendarSelectionIntent: WidgetConfigurationIntent {
+    static var title: LocalizedStringResource = "Kalender auswählen"
+    static var description = IntentDescription("Leer = die Auswahl aus der Watch-App.")
+
+    // Must be optional: WidgetConfigurationIntent requires optional parameter
+    // types, and the watchOS SDK enforces it where iOS lets a bare array pass.
+    @Parameter(title: "Kalender")
+    var selectedCalendars: [WatchCalendarEntity]?
+}