feat: show relative time in notifications + move default duration to profile settings

Notifications now show "in 30 Min. · 10:00" instead of just the time,
giving users immediate context about how soon the event is.

Default event duration picker moved from the View section to right below
the privacy setting, grouped under the calendar/profile settings area.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Calendarr iOS/Views/SettingsView.swift

@@ -39,6 +39,7 @@ struct SettingsView: View {
             Form {
                 profilSection
                 privatsphaereSection
+                termindauerSection
                 benachrichtigungenSection
                 geteilterKalenderSection
                 liquidGlassSection
@@ -147,6 +148,21 @@ struct SettingsView: View {
         }
     }
 
+    // MARK: – Standardtermindauer
+
+    var termindauerSection: some View {
+        Section {
+            Picker(L10n.t("settings.default_duration", appLang), selection: $defaultEventDurationMinutes) {
+                ForEach([15, 30, 45, 60, 90, 120, 240], id: \.self) { m in
+                    Text(ReminderOptions.durationLabel(m, appLang)).tag(m)
+                }
+            }
+            .onChange(of: defaultEventDurationMinutes) { _, _ in SettingsSync.push(api: api) }
+        } header: {
+            Text(L10n.t("settings.calview", appLang))
+        }
+    }
+
     // MARK: – Geteilter Kalender
 
     var geteilterKalenderSection: some View {
@@ -361,12 +377,6 @@ struct SettingsView: View {
             }
             Toggle(L10n.t("settings.dimpast", appLang), isOn: $dimPastEvents)
                 .tint(Color.accentColor)
-            Picker(L10n.t("settings.default_duration", appLang), selection: $defaultEventDurationMinutes) {
-                ForEach([15, 30, 45, 60, 90, 120, 240], id: \.self) { m in
-                    Text(ReminderOptions.durationLabel(m, appLang)).tag(m)
-                }
-            }
-            .onChange(of: defaultEventDurationMinutes) { _, _ in SettingsSync.push(api: api) }
         }
     }