v0.7.0 — Phase β-6 Native-Polish

Drei Sub-Pakete: Keyboard-Shortcuts, Daily-Reminder-Notifications,
WidgetKit-Extension mit App-Group-Daten-Sharing. Siri-Shortcuts
und Share-Extension auf β-7 verschoben — niedrige Priorität, die
drei großen Brocken decken 90% des Native-Polish ab.

Keyboard-Shortcuts:
- Hidden Buttons in StudySessionView mit .keyboardShortcut
- Space = flip, 1/2/3/4 = again/hard/good/easy
- iPad-Magic-Keyboard + macOS-tauglich

Daily-Reminders:
- NotificationManager @Observable mit UNUserNotificationCenter
- Authorization-State + Permission-Request-Flow
- UNCalendarNotificationTrigger täglich zur konfigurierten Zeit
- SettingsView in AccountView mit Toggle + DatePicker
- UserDefaults-Persistierung von Hour/Minute/Enabled

WidgetKit-Extension:
- WidgetSnapshot Codable mit topDecks (Top-3 by dueCount) + totalDueCount
- WidgetSnapshotStore schreibt in group.ev.mana.cards-Container
- DeckListStore.refresh schreibt Snapshot + WidgetCenter.reloadAllTimelines
- CardsWidgetExtension-Target im project.yml (app-extension)
- CardsWidgetBundle + CardsDueWidget mit 5 Familien (small/medium/
  accessoryCircular/accessoryInline/accessoryRectangular)
- DueProvider TimelineProvider mit 30-min-Refresh
- DueWidgetView Family-Switch
- WidgetSnapshot.swift shared in beiden Targets via XcodeGen sources
- App-Group im Haupt- und Widget-Entitlement

35 Tests grün (keine neuen Tests in β-6 — WidgetKit + Notifications
sind System-API-Integrationen, Tests wären überwiegend Mocks).
Build inkl. Widget-Extension grün.

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

Sources/Features/Study/StudySessionView.swift

@@ -72,6 +72,7 @@ struct StudySessionView: View {
                         flipHaptic()
                         session.flip()
                     }
+                keyboardShortcuts(session: session)
                 if session.isFlipped {
                     RatingBar { rating in
                         Task { await session.grade(rating) }
@@ -157,6 +158,31 @@ struct StudySessionView: View {
         .frame(maxWidth: .infinity, maxHeight: .infinity)
     }
 
+    /// Unsichtbare Buttons mit Keyboard-Shortcuts. Funktionieren auf
+    /// iPad (Magic Keyboard) und macOS. Space = flip, 1-4 = Rating.
+    @ViewBuilder
+    private func keyboardShortcuts(session: StudySession) -> some View {
+        Group {
+            Button("Flip") {
+                flipHaptic()
+                session.flip()
+            }
+            .keyboardShortcut(.space, modifiers: [])
+
+            if session.isFlipped {
+                ForEach(Rating.allCases, id: \.self) { rating in
+                    Button(rating.label) {
+                        Task { await session.grade(rating) }
+                    }
+                    .keyboardShortcut(KeyEquivalent(Character(rating.shortcut)), modifiers: [])
+                }
+            }
+        }
+        .frame(width: 0, height: 0)
+        .opacity(0)
+        .accessibilityHidden(true)
+    }
+
     private func flipHaptic() {
         #if canImport(UIKit)
         UIImpactFeedbackGenerator(style: .soft).impactOccurred()